TW18 postcode district: Staines-upon-Thames and around

TW18 is a postcode district mostly in Surrey, with 748 postcodes in use in 5 sectors. It has postcodes in Staines-upon-Thames, Egham and Laleham. It is split between 3 councils: Spelthorne (600 postcodes), Runnymede (141) and Windsor and Maidenhead (7). 741 are in Surrey. ONS lists no county for the other 7.

Postcodes in use
748
Sectors
5
Councils
3 councils
Places
3 places

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

Every postcode in TW18, by flood risk

Map of every postcode in TW18, by flood risk Of the 748 postcodes in TW18 that ONS places, 161 have a home or business at high risk, 134 are at medium risk at worst, 244 are at low risk at worst, 76 are at very low risk only and 133 are not on the Environment Agency's at-risk list. 6 groups of postcodes at high or medium risk are outlined: 102 postcodes at high or medium risk; 76 postcodes at high or medium risk; 20 postcodes at high or medium risk; 18 postcodes at high or medium risk; 18 postcodes at high or medium risk; 9 postcodes at high or medium risk. Places named: Staines-upon-Thames, Laleham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A30M3A320M25 TW18 1AL: not on the flood risk listTW18 1BF: not on the flood risk listTW18 1EB: not on the flood risk listTW18 1EE: not on the flood risk listTW18 1EF: not on the flood risk listTW18 1EG: not on the flood risk listTW18 1HA: not on the flood risk listTW18 1HJ: not on the flood risk listTW18 1HL: not on the flood risk listTW18 1HN: not on the flood risk listTW18 1HP: not on the flood risk listTW18 1HW: not on the flood risk listTW18 1LN: not on the flood risk listTW18 1LQ: not on the flood risk listTW18 1LR: not on the flood risk listTW18 1PY: not on the flood risk listTW18 1SD: not on the flood risk listTW18 1SH: not on the flood risk listTW18 1SL: not on the flood risk listTW18 1SN: not on the flood risk listTW18 1SQ: not on the flood risk listTW18 1SR: not on the flood risk listTW18 1ST: not on the flood risk listTW18 1SW: not on the flood risk listTW18 1SY: not on the flood risk listTW18 1UD: not on the flood risk listTW18 1UE: not on the flood risk listTW18 1UG: not on the flood risk listTW18 1XE: not on the flood risk listTW18 2AD: not on the flood risk listTW18 2BF: not on the flood risk listTW18 2BJ: not on the flood risk listTW18 2BL: not on the flood risk listTW18 2BZ: not on the flood risk listTW18 2DB: not on the flood risk listTW18 2DD: not on the flood risk listTW18 2DF: not on the flood risk listTW18 2DG: not on the flood risk listTW18 2EF: not on the flood risk listTW18 2EG: not on the flood risk listTW18 2ER: not on the flood risk listTW18 2FD: not on the flood risk listTW18 2GP: not on the flood risk listTW18 2HJ: not on the flood risk listTW18 2HL: not on the flood risk listTW18 2HR: not on the flood risk listTW18 2JN: not on the flood risk listTW18 2PT: not on the flood risk listTW18 3FE: not on the flood risk listTW18 3FF: not on the flood risk listTW18 3FG: not on the flood risk listTW18 3FH: not on the flood risk listTW18 3HP: not on the flood risk listTW18 4AJ: not on the flood risk listTW18 4AP: not on the flood risk listTW18 4AY: not on the flood risk listTW18 4BF: not on the flood risk listTW18 4BG: not on the flood risk listTW18 4BJ: not on the flood risk listTW18 4DL: not on the flood risk listTW18 4DQ: not on the flood risk listTW18 4DY: not on the flood risk listTW18 4EB: not on the flood risk listTW18 4EE: not on the flood risk listTW18 4EX: not on the flood risk listTW18 4HL: not on the flood risk listTW18 4HP: not on the flood risk listTW18 4HW: not on the flood risk listTW18 4HX: not on the flood risk listTW18 4JB: not on the flood risk listTW18 4JJ: not on the flood risk listTW18 4JQ: not on the flood risk listTW18 4JU: not on the flood risk listTW18 4JY: not on the flood risk listTW18 4LD: not on the flood risk listTW18 4PP: not on the flood risk listTW18 4QH: not on the flood risk listTW18 4QU: not on the flood risk listTW18 4QY: not on the flood risk listTW18 4SG: not on the flood risk listTW18 4WA: not on the flood risk listTW18 4XX: not on the flood risk listTW18 4XY: not on the flood risk listTW18 4YF: not on the flood risk listTW18 4YJ: not on the flood risk listTW18 1AA: very low flood risk onlyTW18 1AE: very low flood risk onlyTW18 1AS: very low flood risk onlyTW18 1AU: very low flood risk onlyTW18 1AX: very low flood risk onlyTW18 1AY: very low flood risk onlyTW18 1AZ: very low flood risk onlyTW18 1BA: very low flood risk onlyTW18 1BB: very low flood risk onlyTW18 1BJ: very low flood risk onlyTW18 1BL: very low flood risk onlyTW18 1BP: very low flood risk onlyTW18 1BT: very low flood risk onlyTW18 1BU: very low flood risk onlyTW18 1BX: very low flood risk onlyTW18 1BZ: very low flood risk onlyTW18 1DA: very low flood risk onlyTW18 1DB: very low flood risk onlyTW18 1DE: very low flood risk onlyTW18 1DZ: very low flood risk onlyTW18 1ED: very low flood risk onlyTW18 1GA: very low flood risk onlyTW18 1HX: very low flood risk onlyTW18 1HY: very low flood risk onlyTW18 1HZ: very low flood risk onlyTW18 1JA: very low flood risk onlyTW18 1JB: very low flood risk onlyTW18 1JD: very low flood risk onlyTW18 1JE: very low flood risk onlyTW18 1JF: very low flood risk onlyTW18 1JG: very low flood risk onlyTW18 1JH: very low flood risk onlyTW18 1JJ: very low flood risk onlyTW18 1JL: very low flood risk onlyTW18 1JQ: very low flood risk onlyTW18 1JY: very low flood risk onlyTW18 1LH: very low flood risk onlyTW18 1LJ: very low flood risk onlyTW18 1LP: very low flood risk onlyTW18 1LS: very low flood risk onlyTW18 1LT: very low flood risk onlyTW18 1LU: very low flood risk onlyTW18 1LW: very low flood risk onlyTW18 1NE: very low flood risk onlyTW18 1PD: very low flood risk onlyTW18 1TB: very low flood risk onlyTW18 1TD: very low flood risk onlyTW18 1XS: very low flood risk onlyTW18 2BN: very low flood risk onlyTW18 2BT: very low flood risk onlyTW18 2BU: very low flood risk onlyTW18 4HD: very low flood risk onlyTW18 4AX: very low flood risk onlyTW18 4BP: very low flood risk onlyTW18 4BW: very low flood risk onlyTW18 4DD: very low flood risk onlyTW18 4DN: very low flood risk onlyTW18 4EZ: very low flood risk onlyTW18 4HB: very low flood risk onlyTW18 4HF: very low flood risk onlyTW18 4HY: very low flood risk onlyTW18 4JG: very low flood risk onlyTW18 4JL: very low flood risk onlyTW18 4JN: very low flood risk onlyTW18 4JX: very low flood risk onlyTW18 4LY: very low flood risk onlyTW18 4LZ: very low flood risk onlyTW18 4NG: very low flood risk onlyTW18 4NT: very low flood risk onlyTW18 4NZ: very low flood risk onlyTW18 4QN: very low flood risk onlyTW18 4RN: very low flood risk onlyTW18 4RW: very low flood risk onlyTW18 1AB: low flood risk at worstTW18 1AH: low flood risk at worstTW18 1AQ: low flood risk at worstTW18 1AT: low flood risk at worstTW18 1AW: low flood risk at worstTW18 1BD: low flood risk at worstTW18 1BG: low flood risk at worstTW18 1BY: low flood risk at worstTW18 1DD: low flood risk at worstTW18 1DF: low flood risk at worstTW18 1DG: low flood risk at worstTW18 1DH: low flood risk at worstTW18 1DL: low flood risk at worstTW18 1DN: low flood risk at worstTW18 1DP: low flood risk at worstTW18 1DQ: low flood risk at worstTW18 1DR: low flood risk at worstTW18 1DW: low flood risk at worstTW18 1EA: low flood risk at worstTW18 1EH: low flood risk at worstTW18 1EN: low flood risk at worstTW18 1EP: low flood risk at worstTW18 1EQ: low flood risk at worstTW18 1ER: low flood risk at worstTW18 1ES: low flood risk at worstTW18 1ET: low flood risk at worstTW18 1EW: low flood risk at worstTW18 1FB: low flood risk at worstTW18 1GN: low flood risk at worstTW18 1HB: low flood risk at worstTW18 1HD: low flood risk at worstTW18 1HE: low flood risk at worstTW18 1HF: low flood risk at worstTW18 1HG: low flood risk at worstTW18 1HQ: low flood risk at worstTW18 1HR: low flood risk at worstTW18 1HS: low flood risk at worstTW18 1JN: low flood risk at worstTW18 1JP: low flood risk at worstTW18 1JR: low flood risk at worstTW18 1JS: low flood risk at worstTW18 1JT: low flood risk at worstTW18 1JU: low flood risk at worstTW18 1JW: low flood risk at worstTW18 1JX: low flood risk at worstTW18 1JZ: low flood risk at worstTW18 1LX: low flood risk at worstTW18 1LY: low flood risk at worstTW18 1LZ: low flood risk at worstTW18 1NA: low flood risk at worstTW18 1NB: low flood risk at worstTW18 1ND: low flood risk at worstTW18 1NF: low flood risk at worstTW18 1NG: low flood risk at worstTW18 1NH: low flood risk at worstTW18 1NQ: low flood risk at worstTW18 1PA: low flood risk at worstTW18 1PB: low flood risk at worstTW18 1PE: low flood risk at worstTW18 1PF: low flood risk at worstTW18 1PG: low flood risk at worstTW18 1PH: low flood risk at worstTW18 1PJ: low flood risk at worstTW18 1PL: low flood risk at worstTW18 1PN: low flood risk at worstTW18 1PP: low flood risk at worstTW18 1PQ: low flood risk at worstTW18 1PR: low flood risk at worstTW18 1PS: low flood risk at worstTW18 1PT: low flood risk at worstTW18 1PW: low flood risk at worstTW18 1PX: low flood risk at worstTW18 1QF: low flood risk at worstTW18 1QG: low flood risk at worstTW18 1QJ: low flood risk at worstTW18 1QL: low flood risk at worstTW18 1QN: low flood risk at worstTW18 1QP: low flood risk at worstTW18 1QQ: low flood risk at worstTW18 1QW: low flood risk at worstTW18 1RP: low flood risk at worstTW18 1RY: low flood risk at worstTW18 1RZ: low flood risk at worstTW18 1SE: low flood risk at worstTW18 1SJ: low flood risk at worstTW18 1TA: low flood risk at worstTW18 1UB: low flood risk at worstTW18 1UF: low flood risk at worstTW18 1XB: low flood risk at worstTW18 2AA: low flood risk at worstTW18 2AE: low flood risk at worstTW18 2AF: low flood risk at worstTW18 2AG: low flood risk at worstTW18 2AH: low flood risk at worstTW18 2AJ: low flood risk at worstTW18 2AQ: low flood risk at worstTW18 2BA: low flood risk at worstTW18 2BB: low flood risk at worstTW18 2BD: low flood risk at worstTW18 2BW: low flood risk at worstTW18 2BX: low flood risk at worstTW18 2BY: low flood risk at worstTW18 2DH: low flood risk at worstTW18 2DJ: low flood risk at worstTW18 2DN: low flood risk at worstTW18 2ES: low flood risk at worstTW18 2DU: low flood risk at worstTW18 2DW: low flood risk at worstTW18 2DY: low flood risk at worstTW18 2DZ: low flood risk at worstTW18 2EA: low flood risk at worstTW18 2EB: low flood risk at worstTW18 2EH: low flood risk at worstTW18 2EP: low flood risk at worstTW18 2EQ: low flood risk at worstTW18 2EW: low flood risk at worstTW18 2EY: low flood risk at worstTW18 2FA: low flood risk at worstTW18 2FB: low flood risk at worstTW18 2HE: low flood risk at worstTW18 2HN: low flood risk at worstTW18 2HP: low flood risk at worstTW18 2HS: low flood risk at worstTW18 2HY: low flood risk at worstTW18 2JD: low flood risk at worstTW18 2JF: low flood risk at worstTW18 2JT: low flood risk at worstTW18 2JU: low flood risk at worstTW18 2LF: low flood risk at worstTW18 2LG: low flood risk at worstTW18 2LH: low flood risk at worstTW18 2LJ: low flood risk at worstTW18 2LL: low flood risk at worstTW18 2LN: low flood risk at worstTW18 2LQ: low flood risk at worstTW18 2NR: low flood risk at worstTW18 2NW: low flood risk at worstTW18 2QA: low flood risk at worstTW18 2QD: low flood risk at worstTW18 2QE: low flood risk at worstTW18 2QT: low flood risk at worstTW18 2QY: low flood risk at worstTW18 2RD: low flood risk at worstTW18 2RU: low flood risk at worstTW18 2SB: low flood risk at worstTW18 2SJ: low flood risk at worstTW18 2SN: low flood risk at worstTW18 2SW: low flood risk at worstTW18 2SY: low flood risk at worstTW18 3FB: low flood risk at worstTW18 3HS: low flood risk at worstTW18 3JD: low flood risk at worstTW18 4AB: low flood risk at worstTW18 4AG: low flood risk at worstTW18 4AH: low flood risk at worstTW18 4EY: low flood risk at worstTW18 4AS: low flood risk at worstTW18 4BB: low flood risk at worstTW18 4BD: low flood risk at worstTW18 4BL: low flood risk at worstTW18 4BN: low flood risk at worstTW18 4BY: low flood risk at worstTW18 4DE: low flood risk at worstTW18 4DF: low flood risk at worstTW18 4NL: low flood risk at worstTW18 4EQ: low flood risk at worstTW18 4EW: low flood risk at worstTW18 4HA: low flood risk at worstTW18 4HN: low flood risk at worstTW18 4HR: low flood risk at worstTW18 4HS: low flood risk at worstTW18 4HT: low flood risk at worstTW18 4HU: low flood risk at worstTW18 4HZ: low flood risk at worstTW18 4JH: low flood risk at worstTW18 4JT: low flood risk at worstTW18 4JW: low flood risk at worstTW18 4JZ: low flood risk at worstTW18 4LA: low flood risk at worstTW18 4LB: low flood risk at worstTW18 4LG: low flood risk at worstTW18 4LH: low flood risk at worstTW18 4LP: low flood risk at worstTW18 4LQ: low flood risk at worstTW18 4LR: low flood risk at worstTW18 4LS: low flood risk at worstTW18 4LT: low flood risk at worstTW18 4LU: low flood risk at worstTW18 4LW: low flood risk at worstTW18 4LX: low flood risk at worstTW18 4NB: low flood risk at worstTW18 4NE: low flood risk at worstTW18 4NF: low flood risk at worstTW18 4NH: low flood risk at worstTW18 4NJ: low flood risk at worstTW18 4NP: low flood risk at worstTW18 4NQ: low flood risk at worstTW18 4NR: low flood risk at worstTW18 4NS: low flood risk at worstTW18 4NU: low flood risk at worstTW18 4NW: low flood risk at worstTW18 4PA: low flood risk at worstTW18 4PB: low flood risk at worstTW18 4PD: low flood risk at worstTW18 4QD: low flood risk at worstTW18 4QJ: low flood risk at worstTW18 4QL: low flood risk at worstTW18 4QP: low flood risk at worstTW18 4QX: low flood risk at worstTW18 4RH: low flood risk at worstTW18 4RJ: low flood risk at worstTW18 4RL: low flood risk at worstTW18 4RR: low flood risk at worstTW18 4RS: low flood risk at worstTW18 4RT: low flood risk at worstTW18 4RU: low flood risk at worstTW18 4RX: low flood risk at worstTW18 4RY: low flood risk at worstTW18 4SH: low flood risk at worstTW18 4SN: low flood risk at worstTW18 4SW: low flood risk at worstTW18 4TD: low flood risk at worstTW18 4TN: low flood risk at worstTW18 4UP: low flood risk at worstTW18 4US: low flood risk at worstTW18 4XH: low flood risk at worstTW18 4XP: low flood risk at worstTW18 4XR: low flood risk at worstTW18 4XT: low flood risk at worstTW18 4YG: low flood risk at worstTW18 4YH: low flood risk at worstTW18 4YU: low flood risk at worstTW18 4YW: low flood risk at worstTW18 4ZN: low flood risk at worstTW18 4ZT: low flood risk at worstTW18 4ZX: low flood risk at worstTW18 1AG: medium flood risk at worstTW18 1AN: medium flood risk at worstTW18 1AR: medium flood risk at worstTW18 1EJ: medium flood risk at worstTW18 1EL: medium flood risk at worstTW18 1QR: medium flood risk at worstTW18 1QS: medium flood risk at worstTW18 1QT: medium flood risk at worstTW18 1QU: medium flood risk at worstTW18 1QX: medium flood risk at worstTW18 1QY: medium flood risk at worstTW18 1QZ: medium flood risk at worstTW18 1RB: medium flood risk at worstTW18 1RR: medium flood risk at worstTW18 1RS: medium flood risk at worstTW18 1RT: medium flood risk at worstTW18 1RU: medium flood risk at worstTW18 1RW: medium flood risk at worstTW18 1XH: medium flood risk at worstTW18 2AB: medium flood risk at worstTW18 2AN: medium flood risk at worstTW18 2AX: medium flood risk at worstTW18 2AY: medium flood risk at worstTW18 2DS: medium flood risk at worstTW18 2EN: medium flood risk at worstTW18 2EX: medium flood risk at worstTW18 2HB: medium flood risk at worstTW18 2HQ: medium flood risk at worstTW18 2JA: medium flood risk at worstTW18 2JJ: medium flood risk at worstTW18 2JL: medium flood risk at worstTW18 2JX: medium flood risk at worstTW18 2JY: medium flood risk at worstTW18 2JZ: medium flood risk at worstTW18 2LA: medium flood risk at worstTW18 2LB: medium flood risk at worstTW18 2LR: medium flood risk at worstTW18 2NB: medium flood risk at worstTW18 2NP: medium flood risk at worstTW18 2NQ: medium flood risk at worstTW18 2NS: medium flood risk at worstTW18 2NT: medium flood risk at worstTW18 2NU: medium flood risk at worstTW18 2PL: medium flood risk at worstTW18 2PN: medium flood risk at worstTW18 2PP: medium flood risk at worstTW18 2PR: medium flood risk at worstTW18 2PS: medium flood risk at worstTW18 2PU: medium flood risk at worstTW18 2PX: medium flood risk at worstTW18 2QB: medium flood risk at worstTW18 2QF: medium flood risk at worstTW18 2QG: medium flood risk at worstTW18 2QH: medium flood risk at worstTW18 2QL: medium flood risk at worstTW18 2QQ: medium flood risk at worstTW18 2QU: medium flood risk at worstTW18 2QX: medium flood risk at worstTW18 2QZ: medium flood risk at worstTW18 2RA: medium flood risk at worstTW18 2RB: medium flood risk at worstTW18 2RN: medium flood risk at worstTW18 2RS: medium flood risk at worstTW18 2RT: medium flood risk at worstTW18 2SA: medium flood risk at worstTW18 2SD: medium flood risk at worstTW18 2SE: medium flood risk at worstTW18 2SF: medium flood risk at worstTW18 2SG: medium flood risk at worstTW18 2SH: medium flood risk at worstTW18 2SP: medium flood risk at worstTW18 2SQ: medium flood risk at worstTW18 2SR: medium flood risk at worstTW18 2SS: medium flood risk at worstTW18 2ST: medium flood risk at worstTW18 2SU: medium flood risk at worstTW18 2TD: medium flood risk at worstTW18 2TF: medium flood risk at worstTW18 3AL: medium flood risk at worstTW18 3AQ: medium flood risk at worstTW18 3AR: medium flood risk at worstTW18 3AS: medium flood risk at worstTW18 3AT: medium flood risk at worstTW18 3AU: medium flood risk at worstTW18 3AW: medium flood risk at worstTW18 3AX: medium flood risk at worstTW18 3AY: medium flood risk at worstTW18 3AZ: medium flood risk at worstTW18 3BF: medium flood risk at worstTW18 3BG: medium flood risk at worstTW18 3BU: medium flood risk at worstTW18 3BX: medium flood risk at worstTW18 3DA: medium flood risk at worstTW18 3DH: medium flood risk at worstTW18 3DJ: medium flood risk at worstTW18 3DP: medium flood risk at worstTW18 3EB: medium flood risk at worstTW18 3ED: medium flood risk at worstTW18 3EE: medium flood risk at worstTW18 3EF: medium flood risk at worstTW18 3EG: medium flood risk at worstTW18 3EQ: medium flood risk at worstTW18 3FD: medium flood risk at worstTW18 3HD: medium flood risk at worstTW18 3HF: medium flood risk at worstTW18 3HJ: medium flood risk at worstTW18 3HQ: medium flood risk at worstTW18 3JA: medium flood risk at worstTW18 3JE: medium flood risk at worstTW18 3JQ: medium flood risk at worstTW18 4DP: medium flood risk at worstTW18 4EA: medium flood risk at worstTW18 4PG: medium flood risk at worstTW18 4PQ: medium flood risk at worstTW18 4PR: medium flood risk at worstTW18 4PT: medium flood risk at worstTW18 4QB: medium flood risk at worstTW18 4RB: medium flood risk at worstTW18 4RP: medium flood risk at worstTW18 4SJ: medium flood risk at worstTW18 4TB: medium flood risk at worstTW18 4TW: medium flood risk at worstTW18 4WB: medium flood risk at worstTW18 4XL: medium flood risk at worstTW18 4YA: medium flood risk at worstTW18 4YP: medium flood risk at worstTW18 4YR: medium flood risk at worstTW18 4YT: medium flood risk at worstTW18 4YX: medium flood risk at worstTW18 4YY: medium flood risk at worstTW18 4ZB: medium flood risk at worstTW18 1AD: high flood riskTW18 1AJ: high flood riskTW18 1AP: high flood riskTW18 1DS: high flood riskTW18 1HH: high flood riskTW18 1RX: high flood riskTW18 1SB: high flood riskTW18 1SS: high flood riskTW18 1SX: high flood riskTW18 1UA: high flood riskTW18 1UQ: high flood riskTW18 1XD: high flood riskTW18 1YA: high flood riskTW18 2AP: high flood riskTW18 2AW: high flood riskTW18 2AZ: high flood riskTW18 2DA: high flood riskTW18 2DE: high flood riskTW18 2DL: high flood riskTW18 2DX: high flood riskTW18 2ED: high flood riskTW18 2EE: high flood riskTW18 2EL: high flood riskTW18 2HA: high flood riskTW18 2HD: high flood riskTW18 2HF: high flood riskTW18 2HG: high flood riskTW18 2HH: high flood riskTW18 2HT: high flood riskTW18 2HU: high flood riskTW18 2HX: high flood riskTW18 2JH: high flood riskTW18 2LE: high flood riskTW18 2LW: high flood riskTW18 2NA: high flood riskTW18 2ND: high flood riskTW18 2NE: high flood riskTW18 2NF: high flood riskTW18 2NG: high flood riskTW18 2NX: high flood riskTW18 2NY: high flood riskTW18 2PA: high flood riskTW18 2PD: high flood riskTW18 2PE: high flood riskTW18 2PF: high flood riskTW18 2PG: high flood riskTW18 2PH: high flood riskTW18 2PJ: high flood riskTW18 2PQ: high flood riskTW18 2PW: high flood riskTW18 2QJ: high flood riskTW18 2QR: high flood riskTW18 2QS: high flood riskTW18 2QW: high flood riskTW18 2RP: high flood riskTW18 2RR: high flood riskTW18 2RW: high flood riskTW18 2SL: high flood riskTW18 2SX: high flood riskTW18 2SZ: high flood riskTW18 2TA: high flood riskTW18 2TB: high flood riskTW18 2TE: high flood riskTW18 3AD: high flood riskTW18 3AE: high flood riskTW18 3AF: high flood riskTW18 3AG: high flood riskTW18 3AP: high flood riskTW18 3BA: high flood riskTW18 3DB: high flood riskTW18 3DD: high flood riskTW18 3DE: high flood riskTW18 3DF: high flood riskTW18 3DG: high flood riskTW18 3DQ: high flood riskTW18 3DU: high flood riskTW18 3DW: high flood riskTW18 3HR: high flood riskTW18 3EH: high flood riskTW18 3EJ: high flood riskTW18 3EP: high flood riskTW18 3ER: high flood riskTW18 3ES: high flood riskTW18 3ET: high flood riskTW18 3EU: high flood riskTW18 3EW: high flood riskTW18 3EX: high flood riskTW18 3EY: high flood riskTW18 3EZ: high flood riskTW18 3FA: high flood riskTW18 3HB: high flood riskTW18 3HE: high flood riskTW18 3HG: high flood riskTW18 3HH: high flood riskTW18 3HN: high flood riskTW18 3HT: high flood riskTW18 3HU: high flood riskTW18 3HW: high flood riskTW18 3HX: high flood riskTW18 3JF: high flood riskTW18 3JH: high flood riskTW18 3JJ: high flood riskTW18 3JL: high flood riskTW18 3JN: high flood riskTW18 3JS: high flood riskTW18 3JT: high flood riskTW18 3JU: high flood riskTW18 3JX: high flood riskTW18 3JY: high flood riskTW18 3LA: high flood riskTW18 3LB: high flood riskTW18 3LD: high flood riskTW18 3LF: high flood riskTW18 3LG: high flood riskTW18 3LH: high flood riskTW18 3LJ: high flood riskTW18 3LL: high flood riskTW18 3LN: high flood riskTW18 3LP: high flood riskTW18 3LQ: high flood riskTW18 3LR: high flood riskTW18 3LS: high flood riskTW18 3LT: high flood riskTW18 3LU: high flood riskTW18 3LW: high flood riskTW18 3LX: high flood riskTW18 3LY: high flood riskTW18 3LZ: high flood riskTW18 3NB: high flood riskTW18 3ND: high flood riskTW18 3NF: high flood riskTW18 3NG: high flood riskTW18 3NH: high flood riskTW18 3NJ: high flood riskTW18 3NL: high flood riskTW18 3NP: high flood riskTW18 3NQ: high flood riskTW18 3NW: high flood riskTW18 3NZ: high flood riskTW18 4BU: high flood riskTW18 4EN: high flood riskTW18 4EP: high flood riskTW18 4RZ: high flood riskTW18 4SD: high flood riskTW18 4SP: high flood riskTW18 4SY: high flood riskTW18 4TG: high flood riskTW18 4TS: high flood riskTW18 4TT: high flood riskTW18 4TU: high flood riskTW18 4TX: high flood riskTW18 4TY: high flood riskTW18 4TZ: high flood riskTW18 4UA: high flood riskTW18 4UW: high flood riskTW18 4XE: high flood riskTW18 4XZ: high flood riskTW18 4YD: high flood riskTW18 4YE: high flood riskTW18 4YZ: high flood risk Staines-upon-ThamesLaleham 102 postcodes at high or medium risk, outlined: this goes to TW18 3JY, the one with most homes and businesses at high risk102 postcodes at high or medium risk76 postcodes at high or medium risk, outlined: this goes to TW18 2QR, the one with most homes and businesses at high risk76 postcodes at high or medium risk20 postcodes at high or medium risk, outlined: this goes to TW18 3ND, the one with most homes and businesses at high risk20 postcodes at high or medium risk18 postcodes at high or medium risk, outlined: this goes to TW18 1DS, the one with most homes and businesses at high risk18 postcodes at high or medium risk18 postcodes at high or medium risk, outlined: this goes to TW18 2SZ, the one with most homes and businesses at high risk18 postcodes at high or medium risk9 postcodes at high or medium risk, outlined: this goes to TW18 1QX, the one with most homes and businesses at high risk9 postcodes at high or medium risk Map of every postcode in TW18, by flood risk Of the 748 postcodes in TW18 that ONS places, 161 have a home or business at high risk, 134 are at medium risk at worst, 244 are at low risk at worst, 76 are at very low risk only and 133 are not on the Environment Agency's at-risk list. 6 groups of postcodes at high or medium risk are outlined: 102 postcodes at high or medium risk; 76 postcodes at high or medium risk; 20 postcodes at high or medium risk; 18 postcodes at high or medium risk; 18 postcodes at high or medium risk; 9 postcodes at high or medium risk. Places named: Staines-upon-Thames, Laleham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A30M3 Staines-upon-ThamesLaleham 18 postcodes at high or medium risk, outlined: this goes to TW18 1DS, the one with most homes and businesses at high risk18 postcodes at high or medium risk
  • A home or business at high risk: 161
  • At medium risk at worst: 134
  • At low risk at worst: 244
  • At very low risk only: 76
  • Not on the at-risk list: 133
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 748 postcodes in TW18 that ONS places, 161 have a home or business at high risk, 134 are at medium risk at worst, 244 are at low risk at worst, 76 are at very low risk only and 133 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 51.4278, longitude -0.5043. 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

161 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.

TW18 3JY85 at high riskTW18 4BU66 at high riskTW18 4TY59 at high riskTW18 2QR50 at high riskTW18 4TZ43 at high riskTW18 2PQ37 at high riskTW18 3ND34 at high riskTW18 2RP34 at high riskTW18 2PD34 at high riskTW18 3EW34 at high riskTW18 3LG34 at high riskTW18 3LX34 at high risk

Where the postcodes at high or medium risk lie together

  • 102 postcodes at high or medium risk, outlined on the map. TW18 3JY, is the one with most homes and businesses at high risk.
  • 76 postcodes at high or medium risk, outlined on the map. TW18 2QR, is the one with most homes and businesses at high risk.
  • 20 postcodes at high or medium risk, outlined on the map. TW18 3ND, is the one with most homes and businesses at high risk.
  • 18 postcodes at high or medium risk, outlined on the map. TW18 1DS, is the one with most homes and businesses at high risk.
  • 18 postcodes at high or medium risk, outlined on the map. TW18 2SZ, is the one with most homes and businesses at high risk.
  • 9 postcodes at high or medium risk, outlined on the map. TW18 1QX, is the one with most homes and businesses at high risk.

What broadband can you get in TW18?

Ofcom reports on 691 of the 748 postcodes in TW18. At 514 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit514 of 691
Postcodes where every home can get superfast657 of 691

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 TW18 at risk of flooding?

615 of the 748 postcodes in TW18 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 4,232 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 615 of 748 postcodes High: 2,040Medium: 2,192Low: 5,596Very low: 2,045

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 TW18?

Homes in TW18 sold for a typical £450,000 in the 12 months to August 2026, across 300 sales, up 3.4% on the 12 months before, HM Land Registry's figures show.

£450,000 typical price, the 12 months to August 2026
12 months to August 2025
£435,000
12 months to August 2026
£450,000

▲ up 3.4% on the 12 months before

Detached£627,000 47 sales
Semi-detached£518,000 93 sales
Terraced£440,000 78 sales
Flat or maisonette£288,500 82 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 TW18

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

TW18 1202 postcodesTW18 2194 postcodesTW18 3121 postcodesTW18 4202 postcodesTW18 929 postcodes
UK postcode format explained

Places in TW18

Towns and villages with postcodes in TW18, and how many each has here.

Staines-upon-Thames postcodes,572Egham postcodes,98Laleham postcodes,65

Who covers TW18

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

  • Spelthorne600
  • Runnymede and Weybridge141
  • Windsor7

Police force areas

  • Surrey741
  • Thames Valley7

Next to TW18

TW17 postcode district TW19 postcode district All TW districts Staines-upon-Thames postcodes

"Next to" is by number: the districts before and after TW18 in the TW area.

Check a postcode

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