SL4 postcode district: Windsor and around

SL4 is a postcode district in England, with 1,376 postcodes in use in 7 sectors. It has postcodes in Windsor, Old Windsor and Wraysbury, Eton and 1 more place. It is split between 5 councils: Windsor and Maidenhead (1,255 postcodes), Bracknell Forest (97), Buckinghamshire (20) and 2 others. 2 of its 1,376 postcodes are in Surrey. ONS lists no county for the other 1,374.

Postcodes in use
1,376
Sectors
7
Councils
5 councils
Places
4 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SL4, by flood risk

Map of every postcode in SL4, by flood risk Of the 1,376 postcodes in SL4 that ONS places, 71 have a home or business at high risk, 80 are at medium risk at worst, 344 are at low risk at worst, 76 are at very low risk only and 805 are not on the Environment Agency's at-risk list. 6 groups of postcodes at high or medium risk are outlined: 35 postcodes at high or medium risk; 19 postcodes at high or medium risk; 11 postcodes at high or medium risk; 8 postcodes at high or medium risk; 8 postcodes at high or medium risk; 7 postcodes at high or medium risk. Places named: Windsor, Datchet, Eton, Winkfield Row, Eton Wick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A330M4A328A4 SL4 1AA: not on the flood risk listSL4 1AG: not on the flood risk listSL4 1AT: not on the flood risk listSL4 1BE: not on the flood risk listSL4 1BG: not on the flood risk listSL4 1BN: not on the flood risk listSL4 1BP: not on the flood risk listSL4 1BY: not on the flood risk listSL4 1DA: not on the flood risk listSL4 1DG: not on the flood risk listSL4 1DL: not on the flood risk listSL4 1DS: not on the flood risk listSL4 1DT: not on the flood risk listSL4 1EN: not on the flood risk listSL4 1ER: not on the flood risk listSL4 1EU: not on the flood risk listSL4 1GF: not on the flood risk listSL4 1HA: not on the flood risk listSL4 1HD: not on the flood risk listSL4 1HE: not on the flood risk listSL4 1HH: not on the flood risk listSL4 1HJ: not on the flood risk listSL4 1HL: not on the flood risk listSL4 1HN: not on the flood risk listSL4 1HP: not on the flood risk listSL4 1HS: not on the flood risk listSL4 1HU: not on the flood risk listSL4 1HY: not on the flood risk listSL4 1HZ: not on the flood risk listSL4 1JA: not on the flood risk listSL4 1JB: not on the flood risk listSL4 1JH: not on the flood risk listSL4 1JJ: not on the flood risk listSL4 1LA: not on the flood risk listSL4 1LB: not on the flood risk listSL4 1LD: not on the flood risk listSL4 1LJ: not on the flood risk listSL4 1LP: not on the flood risk listSL4 1LU: not on the flood risk listSL4 1NJ: not on the flood risk listSL4 1PA: not on the flood risk listSL4 1RQ: not on the flood risk listSL4 1UT: not on the flood risk listSL4 2AA: not on the flood risk listSL4 2AR: not on the flood risk listSL4 2AS: not on the flood risk listSL4 2AX: not on the flood risk listSL4 2AY: not on the flood risk listSL4 2AZ: not on the flood risk listSL4 2BA: not on the flood risk listSL4 2BD: not on the flood risk listSL4 2BE: not on the flood risk listSL4 2BG: not on the flood risk listSL4 2BH: not on the flood risk listSL4 2BJ: not on the flood risk listSL4 2BL: not on the flood risk listSL4 2BQ: not on the flood risk listSL4 2BS: not on the flood risk listSL4 2BT: not on the flood risk listSL4 2BU: not on the flood risk listSL4 2BW: not on the flood risk listSL4 2BY: not on the flood risk listSL4 2BZ: not on the flood risk listSL4 2DA: not on the flood risk listSL4 2DB: not on the flood risk listSL4 2DD: not on the flood risk listSL4 2DE: not on the flood risk listSL4 2DG: not on the flood risk listSL4 2DH: not on the flood risk listSL4 2DJ: not on the flood risk listSL4 2DN: not on the flood risk listSL4 2DP: not on the flood risk listSL4 2DS: not on the flood risk listSL4 2DT: not on the flood risk listSL4 2DW: not on the flood risk listSL4 2DY: not on the flood risk listSL4 2DZ: not on the flood risk listSL4 2ED: not on the flood risk listSL4 2EE: not on the flood risk listSL4 2EG: not on the flood risk listSL4 2EP: not on the flood risk listSL4 2EQ: not on the flood risk listSL4 2ES: not on the flood risk listSL4 2ET: not on the flood risk listSL4 2EU: not on the flood risk listSL4 2EX: not on the flood risk listSL4 2EY: not on the flood risk listSL4 2FA: not on the flood risk listSL4 2FE: not on the flood risk listSL4 2HA: not on the flood risk listSL4 2HD: not on the flood risk listSL4 2HH: not on the flood risk listSL4 2HJ: not on the flood risk listSL4 2HL: not on the flood risk listSL4 2HN: not on the flood risk listSL4 2HP: not on the flood risk listSL4 2HR: not on the flood risk listSL4 2HS: not on the flood risk listSL4 2HT: not on the flood risk listSL4 2HU: not on the flood risk listSL4 2HW: not on the flood risk listSL4 2HX: not on the flood risk listSL4 2HY: not on the flood risk listSL4 2HZ: not on the flood risk listSL4 2JA: not on the flood risk listSL4 2JB: not on the flood risk listSL4 2JD: not on the flood risk listSL4 2LD: not on the flood risk listSL4 2LL: not on the flood risk listSL4 2LW: not on the flood risk listSL4 2QR: not on the flood risk listSL4 2QT: not on the flood risk listSL4 2QZ: not on the flood risk listSL4 2RA: not on the flood risk listSL4 3AG: not on the flood risk listSL4 3AJ: not on the flood risk listSL4 3AN: not on the flood risk listSL4 3AP: not on the flood risk listSL4 3AR: not on the flood risk listSL4 3AS: not on the flood risk listSL4 3AU: not on the flood risk listSL4 3AX: not on the flood risk listSL4 3AZ: not on the flood risk listSL4 3BD: not on the flood risk listSL4 3BH: not on the flood risk listSL4 3BL: not on the flood risk listSL4 3BY: not on the flood risk listSL4 3DA: not on the flood risk listSL4 3DB: not on the flood risk listSL4 3DG: not on the flood risk listSL4 3DH: not on the flood risk listSL4 3DL: not on the flood risk listSL4 3DN: not on the flood risk listSL4 3DP: not on the flood risk listSL4 3DS: not on the flood risk listSL4 3DT: not on the flood risk listSL4 3DU: not on the flood risk listSL4 3DW: not on the flood risk listSL4 3DX: not on the flood risk listSL4 3DY: not on the flood risk listSL4 3DZ: not on the flood risk listSL4 3EA: not on the flood risk listSL4 3EE: not on the flood risk listSL4 3EH: not on the flood risk listSL4 3EN: not on the flood risk listSL4 3EP: not on the flood risk listSL4 3ES: not on the flood risk listSL4 3ET: not on the flood risk listSL4 3EU: not on the flood risk listSL4 3EX: not on the flood risk listSL4 3EZ: not on the flood risk listSL4 3FA: not on the flood risk listSL4 3FE: not on the flood risk listSL4 3FF: not on the flood risk listSL4 3FG: not on the flood risk listSL4 3FJ: not on the flood risk listSL4 3FL: not on the flood risk listSL4 3FQ: not on the flood risk listSL4 3HB: not on the flood risk listSL4 3HE: not on the flood risk listSL4 3JE: not on the flood risk listSL4 3JG: not on the flood risk listSL4 3JY: not on the flood risk listSL4 3JZ: not on the flood risk listSL4 3LA: not on the flood risk listSL4 3LD: not on the flood risk listSL4 3LE: not on the flood risk listSL4 3LF: not on the flood risk listSL4 3LN: not on the flood risk listSL4 3LP: not on the flood risk listSL4 3LR: not on the flood risk listSL4 3LT: not on the flood risk listSL4 3LU: not on the flood risk listSL4 3LW: not on the flood risk listSL4 3LY: not on the flood risk listSL4 3LZ: not on the flood risk listSL4 3NA: not on the flood risk listSL4 3NB: not on the flood risk listSL4 3NE: not on the flood risk listSL4 3NF: not on the flood risk listSL4 3NG: not on the flood risk listSL4 3NH: not on the flood risk listSL4 3NJ: not on the flood risk listSL4 3NL: not on the flood risk listSL4 3NP: not on the flood risk listSL4 3NQ: not on the flood risk listSL4 3NT: not on the flood risk listSL4 3NU: not on the flood risk listSL4 3NW: not on the flood risk listSL4 3NY: not on the flood risk listSL4 3NZ: not on the flood risk listSL4 3PB: not on the flood risk listSL4 3PD: not on the flood risk listSL4 3PF: not on the flood risk listSL4 3PG: not on the flood risk listSL4 3PH: not on the flood risk listSL4 3PJ: not on the flood risk listSL4 3PP: not on the flood risk listSL4 3PQ: not on the flood risk listSL4 3PS: not on the flood risk listSL4 3PT: not on the flood risk listSL4 3PU: not on the flood risk listSL4 3PW: not on the flood risk listSL4 3PY: not on the flood risk listSL4 3PZ: not on the flood risk listSL4 3QA: not on the flood risk listSL4 3QP: not on the flood risk listSL4 3QR: not on the flood risk listSL4 3QS: not on the flood risk listSL4 3QT: not on the flood risk listSL4 3QU: not on the flood risk listSL4 3QX: not on the flood risk listSL4 3QY: not on the flood risk listSL4 3QZ: not on the flood risk listSL4 3RA: not on the flood risk listSL4 3RB: not on the flood risk listSL4 3RD: not on the flood risk listSL4 3RE: not on the flood risk listSL4 3RF: not on the flood risk listSL4 3RG: not on the flood risk listSL4 3RH: not on the flood risk listSL4 3RL: not on the flood risk listSL4 3RQ: not on the flood risk listSL4 3RR: not on the flood risk listSL4 3RT: not on the flood risk listSL4 3RU: not on the flood risk listSL4 3RW: not on the flood risk listSL4 3RX: not on the flood risk listSL4 3RY: not on the flood risk listSL4 3RZ: not on the flood risk listSL4 3SB: not on the flood risk listSL4 3SD: not on the flood risk listSL4 3SP: not on the flood risk listSL4 3SU: not on the flood risk listSL4 3SX: not on the flood risk listSL4 3SY: not on the flood risk listSL4 3TA: not on the flood risk listSL4 3TN: not on the flood risk listSL4 3TR: not on the flood risk listSL4 3TS: not on the flood risk listSL4 3TW: not on the flood risk listSL4 3YL: not on the flood risk listSL4 4AA: not on the flood risk listSL4 4AB: not on the flood risk listSL4 4AD: not on the flood risk listSL4 4AE: not on the flood risk listSL4 4AF: not on the flood risk listSL4 4AG: not on the flood risk listSL4 4AH: not on the flood risk listSL4 4AJ: not on the flood risk listSL4 4AL: not on the flood risk listSL4 4AN: not on the flood risk listSL4 4AP: not on the flood risk listSL4 4AQ: not on the flood risk listSL4 4AR: not on the flood risk listSL4 4AS: not on the flood risk listSL4 4AT: not on the flood risk listSL4 4AU: not on the flood risk listSL4 4AW: not on the flood risk listSL4 4AX: not on the flood risk listSL4 4AY: not on the flood risk listSL4 4AZ: not on the flood risk listSL4 4BA: not on the flood risk listSL4 4BD: not on the flood risk listSL4 4BE: not on the flood risk listSL4 4BF: not on the flood risk listSL4 4BG: not on the flood risk listSL4 4BH: not on the flood risk listSL4 4BJ: not on the flood risk listSL4 4BL: not on the flood risk listSL4 4BP: not on the flood risk listSL4 4BQ: not on the flood risk listSL4 4BS: not on the flood risk listSL4 4BU: not on the flood risk listSL4 4BW: not on the flood risk listSL4 4BX: not on the flood risk listSL4 4BY: not on the flood risk listSL4 4BZ: not on the flood risk listSL4 4DA: not on the flood risk listSL4 4DB: not on the flood risk listSL4 4DD: not on the flood risk listSL4 4DE: not on the flood risk listSL4 4DH: not on the flood risk listSL4 4DP: not on the flood risk listSL4 4DQ: not on the flood risk listSL4 4DR: not on the flood risk listSL4 4DS: not on the flood risk listSL4 4DT: not on the flood risk listSL4 4DU: not on the flood risk listSL4 4DW: not on the flood risk listSL4 4DX: not on the flood risk listSL4 4DY: not on the flood risk listSL4 4DZ: not on the flood risk listSL4 4EA: not on the flood risk listSL4 4EB: not on the flood risk listSL4 4EG: not on the flood risk listSL4 4EH: not on the flood risk listSL4 4EJ: not on the flood risk listSL4 4EL: not on the flood risk listSL4 4EN: not on the flood risk listSL4 4ER: not on the flood risk listSL4 4ET: not on the flood risk listSL4 4EU: not on the flood risk listSL4 4EW: not on the flood risk listSL4 4EX: not on the flood risk listSL4 4FB: not on the flood risk listSL4 4FG: not on the flood risk listSL4 4GE: not on the flood risk listSL4 4GY: not on the flood risk listSL4 4HA: not on the flood risk listSL4 4HB: not on the flood risk listSL4 4HD: not on the flood risk listSL4 4HE: not on the flood risk listSL4 4HF: not on the flood risk listSL4 4HG: not on the flood risk listSL4 4HH: not on the flood risk listSL4 4HL: not on the flood risk listSL4 4HQ: not on the flood risk listSL4 4HU: not on the flood risk listSL4 4HX: not on the flood risk listSL4 4HY: not on the flood risk listSL4 4JA: not on the flood risk listSL4 4JB: not on the flood risk listSL4 4JD: not on the flood risk listSL4 4JE: not on the flood risk listSL4 4JF: not on the flood risk listSL4 4JG: not on the flood risk listSL4 4JH: not on the flood risk listSL4 4JJ: not on the flood risk listSL4 4JL: not on the flood risk listSL4 4JP: not on the flood risk listSL4 4JQ: not on the flood risk listSL4 4JR: not on the flood risk listSL4 4JS: not on the flood risk listSL4 4JT: not on the flood risk listSL4 4JU: not on the flood risk listSL4 4JX: not on the flood risk listSL4 4JY: not on the flood risk listSL4 4LA: not on the flood risk listSL4 4LE: not on the flood risk listSL4 4LF: not on the flood risk listSL4 4LG: not on the flood risk listSL4 4LH: not on the flood risk listSL4 4LN: not on the flood risk listSL4 4LP: not on the flood risk listSL4 4LR: not on the flood risk listSL4 4LS: not on the flood risk listSL4 4LY: not on the flood risk listSL4 4LZ: not on the flood risk listSL4 4NE: not on the flood risk listSL4 4NF: not on the flood risk listSL4 4NG: not on the flood risk listSL4 4NH: not on the flood risk listSL4 4NL: not on the flood risk listSL4 4NP: not on the flood risk listSL4 4NQ: not on the flood risk listSL4 4NS: not on the flood risk listSL4 4NT: not on the flood risk listSL4 4NW: not on the flood risk listSL4 4NZ: not on the flood risk listSL4 4PA: not on the flood risk listSL4 4PD: not on the flood risk listSL4 4PE: not on the flood risk listSL4 4PF: not on the flood risk listSL4 4PG: not on the flood risk listSL4 4PH: not on the flood risk listSL4 4PJ: not on the flood risk listSL4 4PL: not on the flood risk listSL4 4PN: not on the flood risk listSL4 4PQ: not on the flood risk listSL4 4PR: not on the flood risk listSL4 4PS: not on the flood risk listSL4 4PT: not on the flood risk listSL4 4PW: not on the flood risk listSL4 4PX: not on the flood risk listSL4 4PY: not on the flood risk listSL4 4QA: not on the flood risk listSL4 4QD: not on the flood risk listSL4 4QE: not on the flood risk listSL4 4QF: not on the flood risk listSL4 4QG: not on the flood risk listSL4 4QH: not on the flood risk listSL4 4QJ: not on the flood risk listSL4 4QL: not on the flood risk listSL4 4QN: not on the flood risk listSL4 4QP: not on the flood risk listSL4 4QR: not on the flood risk listSL4 4QS: not on the flood risk listSL4 4QT: not on the flood risk listSL4 4QU: not on the flood risk listSL4 4QW: not on the flood risk listSL4 4QY: not on the flood risk listSL4 4QZ: not on the flood risk listSL4 4RA: not on the flood risk listSL4 4RH: not on the flood risk listSL4 4RJ: not on the flood risk listSL4 4RL: not on the flood risk listSL4 4RP: not on the flood risk listSL4 4RR: not on the flood risk listSL4 4RS: not on the flood risk listSL4 4RU: not on the flood risk listSL4 4RW: not on the flood risk listSL4 4RX: not on the flood risk listSL4 4RZ: not on the flood risk listSL4 4SA: not on the flood risk listSL4 4SB: not on the flood risk listSL4 4SD: not on the flood risk listSL4 4SG: not on the flood risk listSL4 4SJ: not on the flood risk listSL4 4SL: not on the flood risk listSL4 4SP: not on the flood risk listSL4 4SR: not on the flood risk listSL4 4SS: not on the flood risk listSL4 4SU: not on the flood risk listSL4 4SW: not on the flood risk listSL4 4SY: not on the flood risk listSL4 4TA: not on the flood risk listSL4 4TB: not on the flood risk listSL4 4TE: not on the flood risk listSL4 4TH: not on the flood risk listSL4 4TL: not on the flood risk listSL4 4TN: not on the flood risk listSL4 4TP: not on the flood risk listSL4 4TR: not on the flood risk listSL4 4TT: not on the flood risk listSL4 4TU: not on the flood risk listSL4 4TW: not on the flood risk listSL4 4TZ: not on the flood risk listSL4 4UA: not on the flood risk listSL4 4UB: not on the flood risk listSL4 4UD: not on the flood risk listSL4 4UE: not on the flood risk listSL4 4UH: not on the flood risk listSL4 4UL: not on the flood risk listSL4 4UN: not on the flood risk listSL4 4UP: not on the flood risk listSL4 4UR: not on the flood risk listSL4 4US: not on the flood risk listSL4 4UT: not on the flood risk listSL4 4XA: not on the flood risk listSL4 4XD: not on the flood risk listSL4 4XE: not on the flood risk listSL4 4XH: not on the flood risk listSL4 4XL: not on the flood risk listSL4 4XN: not on the flood risk listSL4 4XP: not on the flood risk listSL4 4XR: not on the flood risk listSL4 4XS: not on the flood risk listSL4 4XT: not on the flood risk listSL4 4XW: not on the flood risk listSL4 4XX: not on the flood risk listSL4 4XZ: not on the flood risk listSL4 4YA: not on the flood risk listSL4 4YB: not on the flood risk listSL4 4YE: not on the flood risk listSL4 4YG: not on the flood risk listSL4 4YH: not on the flood risk listSL4 4YJ: not on the flood risk listSL4 4YL: not on the flood risk listSL4 4YN: not on the flood risk listSL4 4YP: not on the flood risk listSL4 4YQ: not on the flood risk listSL4 4YR: not on the flood risk listSL4 4YS: not on the flood risk listSL4 4YT: not on the flood risk listSL4 4YU: not on the flood risk listSL4 4YX: not on the flood risk listSL4 4YY: not on the flood risk listSL4 4YZ: not on the flood risk listSL4 5AD: not on the flood risk listSL4 5AF: not on the flood risk listSL4 5AL: not on the flood risk listSL4 5BB: not on the flood risk listSL4 5BD: not on the flood risk listSL4 5BH: not on the flood risk listSL4 5FZ: not on the flood risk listSL4 5GF: not on the flood risk listSL4 5GT: not on the flood risk listSL4 5GX: not on the flood risk listSL4 5GY: not on the flood risk listSL4 5GZ: not on the flood risk listSL4 5LP: not on the flood risk listSL4 5LQ: not on the flood risk listSL4 5LR: not on the flood risk listSL4 5LS: not on the flood risk listSL4 5LT: not on the flood risk listSL4 5LU: not on the flood risk listSL4 5LW: not on the flood risk listSL4 5LX: not on the flood risk listSL4 5NN: not on the flood risk listSL4 5NP: not on the flood risk listSL4 5NR: not on the flood risk listSL4 5NT: not on the flood risk listSL4 5PE: not on the flood risk listSL4 5PH: not on the flood risk listSL4 5PQ: not on the flood risk listSL4 5PR: not on the flood risk listSL4 5PY: not on the flood risk listSL4 5QA: not on the flood risk listSL4 5QB: not on the flood risk listSL4 5QD: not on the flood risk listSL4 5QE: not on the flood risk listSL4 5QP: not on the flood risk listSL4 5QR: not on the flood risk listSL4 5QS: not on the flood risk listSL4 5QT: not on the flood risk listSL4 5QU: not on the flood risk listSL4 5RA: not on the flood risk listSL4 5RD: not on the flood risk listSL4 5RE: not on the flood risk listSL4 5RG: not on the flood risk listSL4 5RJ: not on the flood risk listSL4 5RL: not on the flood risk listSL4 5RP: not on the flood risk listSL4 5RQ: not on the flood risk listSL4 5RR: not on the flood risk listSL4 5RS: not on the flood risk listSL4 5RT: not on the flood risk listSL4 5RW: not on the flood risk listSL4 5SF: not on the flood risk listSL4 5SG: not on the flood risk listSL4 5SH: not on the flood risk listSL4 5SL: not on the flood risk listSL4 5SN: not on the flood risk listSL4 5SP: not on the flood risk listSL4 5ST: not on the flood risk listSL4 5SU: not on the flood risk listSL4 5SZ: not on the flood risk listSL4 5TD: not on the flood risk listSL4 5UA: not on the flood risk listSL4 5UD: not on the flood risk listSL4 5UF: not on the flood risk listSL4 5UP: not on the flood risk listSL4 5UQ: not on the flood risk listSL4 5UR: not on the flood risk listSL4 5WF: not on the flood risk listSL4 5WH: not on the flood risk listSL4 1DP: very low flood risk onlySL4 2AF: very low flood risk onlySL4 2JH: very low flood risk onlySL4 2JS: very low flood risk onlySL4 2LG: very low flood risk onlySL4 2LQ: very low flood risk onlySL4 2ND: very low flood risk onlySL4 2NF: very low flood risk onlySL4 2PN: very low flood risk onlySL4 2QF: very low flood risk onlySL4 2RF: very low flood risk onlySL4 2RG: very low flood risk onlySL4 2RH: very low flood risk onlySL4 2RT: very low flood risk onlySL4 2RU: very low flood risk onlySL4 2RX: very low flood risk onlySL4 2RY: very low flood risk onlySL4 2RZ: very low flood risk onlySL4 2ST: very low flood risk onlySL4 2SY: very low flood risk onlySL4 3SJ: very low flood risk onlySL4 3DR: very low flood risk onlySL4 3EG: very low flood risk onlySL4 3EQ: very low flood risk onlySL4 3HA: very low flood risk onlySL4 3HD: very low flood risk onlySL4 3JA: very low flood risk onlySL4 3JB: very low flood risk onlySL4 3JJ: very low flood risk onlySL4 3JP: very low flood risk onlySL4 3LL: very low flood risk onlySL4 3QB: very low flood risk onlySL4 3QF: very low flood risk onlySL4 3SS: very low flood risk onlySL4 5AZ: very low flood risk onlySL4 5HJ: very low flood risk onlySL4 5HT: very low flood risk onlySL4 5PP: very low flood risk onlySL4 5PT: very low flood risk onlySL4 5PU: very low flood risk onlySL4 5PW: very low flood risk onlySL4 5QY: very low flood risk onlySL4 5SE: very low flood risk onlySL4 6DG: very low flood risk onlySL4 6DJ: very low flood risk onlySL4 6PA: very low flood risk onlySL4 6PZ: very low flood risk onlySL4 6QL: very low flood risk onlySL4 6QP: very low flood risk onlySL4 6QT: very low flood risk onlySL4 1BF: low flood risk at worstSL4 1JF: low flood risk at worstSL4 1PJ: low flood risk at worstSL4 1PL: low flood risk at worstSL4 1PU: low flood risk at worstSL4 1QL: low flood risk at worstSL4 1QZ: low flood risk at worstSL4 1RD: low flood risk at worstSL4 1RT: low flood risk at worstSL4 1RX: low flood risk at worstSL4 1RY: low flood risk at worstSL4 1SA: low flood risk at worstSL4 1SB: low flood risk at worstSL4 1SR: low flood risk at worstSL4 1SS: low flood risk at worstSL4 1ST: low flood risk at worstSL4 1SZ: low flood risk at worstSL4 1TB: low flood risk at worstSL4 1TH: low flood risk at worstSL4 2AQ: low flood risk at worstSL4 2PX: low flood risk at worstSL4 2GA: low flood risk at worstSL4 2JN: low flood risk at worstSL4 2JU: low flood risk at worstSL4 2LB: low flood risk at worstSL4 2LF: low flood risk at worstSL4 2LH: low flood risk at worstSL4 2LJ: low flood risk at worstSL4 2LN: low flood risk at worstSL4 2LP: low flood risk at worstSL4 2LS: low flood risk at worstSL4 2LT: low flood risk at worstSL4 2LU: low flood risk at worstSL4 2LX: low flood risk at worstSL4 2LY: low flood risk at worstSL4 2NB: low flood risk at worstSL4 2NE: low flood risk at worstSL4 2NG: low flood risk at worstSL4 2NH: low flood risk at worstSL4 2NJ: low flood risk at worstSL4 2NQ: low flood risk at worstSL4 2NT: low flood risk at worstSL4 2NU: low flood risk at worstSL4 2NZ: low flood risk at worstSL4 2PF: low flood risk at worstSL4 2PH: low flood risk at worstSL4 2RP: low flood risk at worstSL4 2PL: low flood risk at worstSL4 2PP: low flood risk at worstSL4 2PQ: low flood risk at worstSL4 2PR: low flood risk at worstSL4 2PS: low flood risk at worstSL4 2PW: low flood risk at worstSL4 2QA: low flood risk at worstSL4 2QB: low flood risk at worstSL4 2QD: low flood risk at worstSL4 2QE: low flood risk at worstSL4 2QQ: low flood risk at worstSL4 2QJ: low flood risk at worstSL4 2QS: low flood risk at worstSL4 2QW: low flood risk at worstSL4 2RR: low flood risk at worstSL4 2RS: low flood risk at worstSL4 2SB: low flood risk at worstSL4 2SD: low flood risk at worstSL4 2SH: low flood risk at worstSL4 2SJ: low flood risk at worstSL4 2SQ: low flood risk at worstSL4 2SZ: low flood risk at worstSL4 3BA: low flood risk at worstSL4 3HH: low flood risk at worstSL4 3HL: low flood risk at worstSL4 3HN: low flood risk at worstSL4 3HQ: low flood risk at worstSL4 3HU: low flood risk at worstSL4 3HW: low flood risk at worstSL4 3QD: low flood risk at worstSL4 3QN: low flood risk at worstSL4 3SA: low flood risk at worstSL4 3SE: low flood risk at worstSL4 3SF: low flood risk at worstSL4 3TP: low flood risk at worstSL4 4QQ: low flood risk at worstSL4 4SE: low flood risk at worstSL4 4SH: low flood risk at worstSL4 5AA: low flood risk at worstSL4 5AB: low flood risk at worstSL4 5AH: low flood risk at worstSL4 5AN: low flood risk at worstSL4 5AP: low flood risk at worstSL4 5AR: low flood risk at worstSL4 5AS: low flood risk at worstSL4 5AU: low flood risk at worstSL4 5AX: low flood risk at worstSL4 5AY: low flood risk at worstSL4 5BG: low flood risk at worstSL4 5BL: low flood risk at worstSL4 5BP: low flood risk at worstSL4 5BU: low flood risk at worstSL4 5BX: low flood risk at worstSL4 5BY: low flood risk at worstSL4 5BZ: low flood risk at worstSL4 5DB: low flood risk at worstSL4 5DG: low flood risk at worstSL4 5DJ: low flood risk at worstSL4 5DL: low flood risk at worstSL4 5DP: low flood risk at worstSL4 5DR: low flood risk at worstSL4 5DT: low flood risk at worstSL4 5DU: low flood risk at worstSL4 5DY: low flood risk at worstSL4 5EB: low flood risk at worstSL4 5ED: low flood risk at worstSL4 5EG: low flood risk at worstSL4 5EH: low flood risk at worstSL4 5EJ: low flood risk at worstSL4 5EN: low flood risk at worstSL4 5EP: low flood risk at worstSL4 5EQ: low flood risk at worstSL4 5ER: low flood risk at worstSL4 5ES: low flood risk at worstSL4 5ET: low flood risk at worstSL4 5EW: low flood risk at worstSL4 5EY: low flood risk at worstSL4 5EZ: low flood risk at worstSL4 5FF: low flood risk at worstSL4 5FG: low flood risk at worstSL4 5FW: low flood risk at worstSL4 5FY: low flood risk at worstSL4 5GD: low flood risk at worstSL4 5GG: low flood risk at worstSL4 5GL: low flood risk at worstSL4 5GR: low flood risk at worstSL4 5GS: low flood risk at worstSL4 5GW: low flood risk at worstSL4 5HA: low flood risk at worstSL4 5HD: low flood risk at worstSL4 5HF: low flood risk at worstSL4 5HG: low flood risk at worstSL4 5HL: low flood risk at worstSL4 5HN: low flood risk at worstSL4 5HP: low flood risk at worstSL4 5HQ: low flood risk at worstSL4 5HU: low flood risk at worstSL4 5HW: low flood risk at worstSL4 5JD: low flood risk at worstSL4 5JE: low flood risk at worstSL4 5JL: low flood risk at worstSL4 5JN: low flood risk at worstSL4 5JS: low flood risk at worstSL4 5JT: low flood risk at worstSL4 5JY: low flood risk at worstSL4 5JZ: low flood risk at worstSL4 5LA: low flood risk at worstSL4 5LB: low flood risk at worstSL4 5LD: low flood risk at worstSL4 5LG: low flood risk at worstSL4 5LH: low flood risk at worstSL4 5LJ: low flood risk at worstSL4 5NG: low flood risk at worstSL4 5LZ: low flood risk at worstSL4 5NA: low flood risk at worstSL4 5NE: low flood risk at worstSL4 5NF: low flood risk at worstSL4 5NH: low flood risk at worstSL4 5NL: low flood risk at worstSL4 5PF: low flood risk at worstSL4 5PG: low flood risk at worstSL4 5PJ: low flood risk at worstSL4 5PL: low flood risk at worstSL4 5PN: low flood risk at worstSL4 5TP: low flood risk at worstSL4 5TW: low flood risk at worstSL4 5TY: low flood risk at worstSL4 5TZ: low flood risk at worstSL4 5UJ: low flood risk at worstSL4 5UN: low flood risk at worstSL4 6AA: low flood risk at worstSL4 6AB: low flood risk at worstSL4 6AE: low flood risk at worstSL4 6AL: low flood risk at worstSL4 6BD: low flood risk at worstSL4 6BG: low flood risk at worstSL4 6DD: low flood risk at worstSL4 6DH: low flood risk at worstSL4 6DN: low flood risk at worstSL4 6DT: low flood risk at worstSL4 6DX: low flood risk at worstSL4 6DY: low flood risk at worstSL4 6EB: low flood risk at worstSL4 6EH: low flood risk at worstSL4 6EE: low flood risk at worstSL4 6EF: low flood risk at worstSL4 6EN: low flood risk at worstSL4 6EU: low flood risk at worstSL4 6EX: low flood risk at worstSL4 6EY: low flood risk at worstSL4 6FJ: low flood risk at worstSL4 6HB: low flood risk at worstSL4 6JA: low flood risk at worstSL4 6JE: low flood risk at worstSL4 6JF: low flood risk at worstSL4 6JH: low flood risk at worstSL4 6JL: low flood risk at worstSL4 6JP: low flood risk at worstSL4 6JR: low flood risk at worstSL4 6JU: low flood risk at worstSL4 6JY: low flood risk at worstSL4 6LB: low flood risk at worstSL4 6LD: low flood risk at worstSL4 6LH: low flood risk at worstSL4 6LP: low flood risk at worstSL4 6LT: low flood risk at worstSL4 6LU: low flood risk at worstSL4 6LX: low flood risk at worstSL4 6LZ: low flood risk at worstSL4 6NA: low flood risk at worstSL4 6NB: low flood risk at worstSL4 6ND: low flood risk at worstSL4 6NE: low flood risk at worstSL4 6NF: low flood risk at worstSL4 6NG: low flood risk at worstSL4 6NH: low flood risk at worstSL4 6NJ: low flood risk at worstSL4 6NL: low flood risk at worstSL4 6NN: low flood risk at worstSL4 6NQ: low flood risk at worstSL4 6NW: low flood risk at worstSL4 6PE: low flood risk at worstSL4 6PF: low flood risk at worstSL4 6PL: low flood risk at worstSL4 6PP: low flood risk at worstSL4 6PS: low flood risk at worstSL4 6PX: low flood risk at worstSL4 6PY: low flood risk at worstSL4 6QA: low flood risk at worstSL4 6QB: low flood risk at worstSL4 6QE: low flood risk at worstSL4 6QG: low flood risk at worstSL4 6QH: low flood risk at worstSL4 6QJ: low flood risk at worstSL4 6QN: low flood risk at worstSL4 6QQ: low flood risk at worstSL4 6QR: low flood risk at worstSL4 6QW: low flood risk at worstSL4 6SS: low flood risk at worstSL4 1AN: medium flood risk at worstSL4 1QT: medium flood risk at worstSL4 1QY: medium flood risk at worstSL4 1RB: medium flood risk at worstSL4 1RS: medium flood risk at worstSL4 1SE: medium flood risk at worstSL4 1SQ: medium flood risk at worstSL4 1TG: medium flood risk at worstSL4 2BF: medium flood risk at worstSL4 2JG: medium flood risk at worstSL4 2JJ: medium flood risk at worstSL4 2JR: medium flood risk at worstSL4 2LA: medium flood risk at worstSL4 2LR: medium flood risk at worstSL4 2NR: medium flood risk at worstSL4 2NW: medium flood risk at worstSL4 2NX: medium flood risk at worstSL4 2NY: medium flood risk at worstSL4 2PA: medium flood risk at worstSL4 2PB: medium flood risk at worstSL4 2PT: medium flood risk at worstSL4 2PU: medium flood risk at worstSL4 2RN: medium flood risk at worstSL4 2RW: medium flood risk at worstSL4 2SA: medium flood risk at worstSL4 2SG: medium flood risk at worstSL4 3HS: medium flood risk at worstSL4 3JL: medium flood risk at worstSL4 3JN: medium flood risk at worstSL4 3JR: medium flood risk at worstSL4 3JS: medium flood risk at worstSL4 4PZ: medium flood risk at worstSL4 5JA: medium flood risk at worstSL4 5JQ: medium flood risk at worstSL4 5TJ: medium flood risk at worstSL4 5TN: medium flood risk at worstSL4 5TS: medium flood risk at worstSL4 5TU: medium flood risk at worstSL4 6AN: medium flood risk at worstSL4 6AP: medium flood risk at worstSL4 6AQ: medium flood risk at worstSL4 6AS: medium flood risk at worstSL4 6AZ: medium flood risk at worstSL4 6BN: medium flood risk at worstSL4 6EJ: medium flood risk at worstSL4 6ER: medium flood risk at worstSL4 6ET: medium flood risk at worstSL4 6HJ: medium flood risk at worstSL4 6JN: medium flood risk at worstSL4 6JT: medium flood risk at worstSL4 6JX: medium flood risk at worstSL4 6LA: medium flood risk at worstSL4 6LF: medium flood risk at worstSL4 6LL: medium flood risk at worstSL4 6PB: medium flood risk at worstSL4 6PD: medium flood risk at worstSL4 6PG: medium flood risk at worstSL4 6QD: medium flood risk at worstSL4 6QY: medium flood risk at worstSL4 6QZ: medium flood risk at worstSL4 1QN: high flood riskSL4 1JE: high flood riskSL4 1QE: high flood riskSL4 1QX: high flood riskSL4 2AB: high flood riskSL4 2AD: high flood riskSL4 2AG: high flood riskSL4 2AH: high flood riskSL4 2AJ: high flood riskSL4 2AN: high flood riskSL4 2AP: high flood riskSL4 2AW: high flood riskSL4 2FB: high flood riskSL4 2FF: high flood riskSL4 2JL: high flood riskSL4 2JQ: high flood riskSL4 2JT: high flood riskSL4 2JW: high flood riskSL4 2JX: high flood riskSL4 2JY: high flood riskSL4 2JZ: high flood riskSL4 2NS: high flood riskSL4 2PG: high flood riskSL4 2RJ: high flood riskSL4 2QG: high flood riskSL4 2QL: high flood riskSL4 2QY: high flood riskSL4 2RB: high flood riskSL4 2RD: high flood riskSL4 2RE: high flood riskSL4 2SE: high flood riskSL4 3ER: high flood riskSL4 3JQ: high flood riskSL4 4SF: high flood riskSL4 5HZ: high flood riskSL4 5JB: high flood riskSL4 5JH: high flood riskSL4 5JJ: high flood riskSL4 5TG: high flood riskSL4 5TH: high flood riskSL4 5UG: high flood riskSL4 5UL: high flood riskSL4 6AR: high flood riskSL4 6BJ: high flood riskSL4 6BQ: high flood riskSL4 6BS: high flood riskSL4 6BT: high flood riskSL4 6BU: high flood riskSL4 6BW: high flood riskSL4 6DB: high flood riskSL4 6DW: high flood riskSL4 6DU: high flood riskSL4 6EG: high flood riskSL4 6ES: high flood riskSL4 6HD: high flood riskSL4 6HL: high flood riskSL4 6HN: high flood riskSL4 6HP: high flood riskSL4 6HR: high flood riskSL4 6HU: high flood riskSL4 6HW: high flood riskSL4 6HX: high flood riskSL4 6QS: high flood riskSL4 6QU: high flood risk WindsorDatchetEtonWinkfield RowEton Wick 35 postcodes at high or medium risk, outlined: this goes to SL4 6FB, the one with most homes and businesses at high risk35 postcodes at high or medium risk19 postcodes at high or medium risk, outlined: this goes to SL4 2JL, the one with most homes and businesses at high risk19 postcodes at high or medium risk11 postcodes at high or medium risk, outlined: this goes to SL4 2AW, the one with most homes and businesses at high risk11 postcodes at high or medium risk8 postcodes at high or medium risk, outlined: this goes to SL4 3JQ, the one with most homes and businesses at high risk8 postcodes at high or medium risk8 postcodes at high or medium risk, outlined: this goes to SL4 6LQ, the one with most homes and businesses at high risk8 postcodes at high or medium risk7 postcodes at high or medium risk, outlined: this goes to SL4 5TG, the one with most homes and businesses at high risk7 postcodes at high or medium risk Map of every postcode in SL4, by flood risk Of the 1,376 postcodes in SL4 that ONS places, 71 have a home or business at high risk, 80 are at medium risk at worst, 344 are at low risk at worst, 76 are at very low risk only and 805 are not on the Environment Agency's at-risk list. 6 groups of postcodes at high or medium risk are outlined: 35 postcodes at high or medium risk; 19 postcodes at high or medium risk; 11 postcodes at high or medium risk; 8 postcodes at high or medium risk; 8 postcodes at high or medium risk; 7 postcodes at high or medium risk. Places named: Windsor, Old Windsor and Wraysbury, Eton, Winkfield Row. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A328 WindsorOld Windsor and WraysburyEtonWinkfield Row 8 postcodes at high or medium risk, outlined: this goes to SL4 6LQ, the one with most homes and businesses at high risk8 postcodes at high or medium risk
  • A home or business at high risk: 71
  • At medium risk at worst: 80
  • At low risk at worst: 344
  • At very low risk only: 76
  • Not on the at-risk list: 805
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 1,376 postcodes in SL4 that ONS places, 71 have a home or business at high risk, 80 are at medium risk at worst, 344 are at low risk at worst, 76 are at very low risk only and 805 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 51.4753, longitude -0.6276. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

The postcodes at high risk

71 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

SL4 2JY39 at high riskSL4 2AW28 at high riskSL4 2AD24 at high riskSL4 2AH18 at high riskSL4 6HW18 at high riskSL4 2AG16 at high riskSL4 2JL14 at high riskSL4 5JJ13 at high riskSL4 6FB12 at high riskSL4 6BT11 at high riskSL4 5TG10 at high riskSL4 6HX10 at high risk

Where the postcodes at high or medium risk lie together

  • 35 postcodes at high or medium risk, outlined on the map. SL4 6FB, is the one with most homes and businesses at high risk.
  • 19 postcodes at high or medium risk, outlined on the map. SL4 2JL, is the one with most homes and businesses at high risk.
  • 11 postcodes at high or medium risk, outlined on the map. SL4 2AW, is the one with most homes and businesses at high risk.
  • 8 postcodes at high or medium risk, outlined on the map. SL4 3JQ, is the one with most homes and businesses at high risk.
  • 8 postcodes at high or medium risk, outlined on the map. SL4 6LQ, is the one with most homes and businesses at high risk.
  • 7 postcodes at high or medium risk, outlined on the map. SL4 5TG, is the one with most homes and businesses at high risk.

What broadband can you get in SL4?

Ofcom reports on 1,284 of the 1,376 postcodes in SL4. At 853 of them every home and business can get gigabit broadband, and at 4 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit853 of 1,284
Postcodes where every home can get superfast1,135 of 1,284
Postcodes where some cannot get decent broadband4 of 1,284

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is SL4 at risk of flooding?

571 of the 1,376 postcodes in SL4 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 1,299 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 571 of 1,376 postcodes High: 420Medium: 879Low: 6,283Very low: 1,548

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SL4?

Homes in SL4 sold for a typical £500,000 in the 12 months to August 2026, across 407 sales, down 2.7% on the 12 months before, HM Land Registry's figures show.

£500,000 typical price, the 12 months to August 2026
12 months to August 2025
£513,750
12 months to August 2026
£500,000

▼ down 2.7% on the 12 months before

Detached£800,000 68 sales
Semi-detached£575,000 106 sales
Terraced£490,000 125 sales
Flat or maisonette£303,750 108 sales

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in SL4

Pick a sector, then a postcode. A sector is the district plus the next digit.

SL4 1158 postcodesSL4 2216 postcodesSL4 3238 postcodesSL4 4294 postcodesSL4 5260 postcodesSL4 6177 postcodesSL4 933 postcodes
UK postcode format explained

Places in SL4

Towns and villages with postcodes in SL4, and how many each has here.

Windsor postcodes,910Old Windsor and Wraysbury postcodes,121Eton postcodes,91Eton Wick postcodes,50

Who covers SL4

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Windsor1,230
  • Maidenhead124
  • Beaconsfield20
  • Slough2

Police force areas

  • Thames Valley1,374
  • Surrey2

Next to SL4

SL3 postcode district SL5 postcode district All SL districts Windsor postcodes

"Next to" is by number: the districts before and after SL4 in the SL area.

Check a postcode

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