TW1 postcode district: Richmond upon Thames and around

TW1 is a postcode district in England, with 665 postcodes in use in 5 sectors. It has postcodes in Richmond upon Thames and Hounslow. It is split between 2 councils: Richmond upon Thames (626 postcodes) and Hounslow (39).

Postcodes in use
665
Sectors
5
Councils
2 councils
Places
2 places

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

Every postcode in TW1, by flood risk

Map of every postcode in TW1, by flood risk Of the 665 postcodes in TW1 that ONS places, 20 have a home or business at high risk, 23 are at medium risk at worst, 107 are at low risk at worst, 46 are at very low risk only and 469 are not on the Environment Agency's at-risk list. 4 groups of postcodes at high or medium risk are outlined: 11 postcodes at high or medium risk; 9 postcodes at high or medium risk; 8 postcodes at high or medium risk; 7 postcodes at high or medium risk. Places named: Richmond upon Thames. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A316 TW1 1AA: not on the flood risk listTW1 1AF: not on the flood risk listTW1 1AH: not on the flood risk listTW1 1AJ: not on the flood risk listTW1 1AL: not on the flood risk listTW1 1AQ: not on the flood risk listTW1 1AU: not on the flood risk listTW1 1AW: not on the flood risk listTW1 1AX: not on the flood risk listTW1 1AY: not on the flood risk listTW1 1AZ: not on the flood risk listTW1 1BA: not on the flood risk listTW1 1BB: not on the flood risk listTW1 1BE: not on the flood risk listTW1 1BH: not on the flood risk listTW1 1BJ: not on the flood risk listTW1 1BL: not on the flood risk listTW1 1BN: not on the flood risk listTW1 1BP: not on the flood risk listTW1 1BS: not on the flood risk listTW1 1BT: not on the flood risk listTW1 1BU: not on the flood risk listTW1 1BW: not on the flood risk listTW1 1BX: not on the flood risk listTW1 1BY: not on the flood risk listTW1 1BZ: not on the flood risk listTW1 1DA: not on the flood risk listTW1 1DQ: not on the flood risk listTW1 1DS: not on the flood risk listTW1 1DX: not on the flood risk listTW1 1EA: not on the flood risk listTW1 1EE: not on the flood risk listTW1 1EF: not on the flood risk listTW1 1EG: not on the flood risk listTW1 1EJ: not on the flood risk listTW1 1EL: not on the flood risk listTW1 1EN: not on the flood risk listTW1 1EQ: not on the flood risk listTW1 1ER: not on the flood risk listTW1 1ET: not on the flood risk listTW1 1EU: not on the flood risk listTW1 1EW: not on the flood risk listTW1 1EX: not on the flood risk listTW1 1EZ: not on the flood risk listTW1 1FD: not on the flood risk listTW1 1FE: not on the flood risk listTW1 1HA: not on the flood risk listTW1 1HB: not on the flood risk listTW1 1HD: not on the flood risk listTW1 1HG: not on the flood risk listTW1 1HU: not on the flood risk listTW1 1HX: not on the flood risk listTW1 1JA: not on the flood risk listTW1 1JB: not on the flood risk listTW1 1LJ: not on the flood risk listTW1 1LR: not on the flood risk listTW1 1LU: not on the flood risk listTW1 1LX: not on the flood risk listTW1 1LZ: not on the flood risk listTW1 1NA: not on the flood risk listTW1 1NB: not on the flood risk listTW1 1ND: not on the flood risk listTW1 1NE: not on the flood risk listTW1 1NG: not on the flood risk listTW1 1NH: not on the flood risk listTW1 1NJ: not on the flood risk listTW1 1NL: not on the flood risk listTW1 1NN: not on the flood risk listTW1 1NP: not on the flood risk listTW1 1NQ: not on the flood risk listTW1 1NW: not on the flood risk listTW1 1PG: not on the flood risk listTW1 1PJ: not on the flood risk listTW1 1PL: not on the flood risk listTW1 1PN: not on the flood risk listTW1 1PR: not on the flood risk listTW1 1PS: not on the flood risk listTW1 1PU: not on the flood risk listTW1 1PX: not on the flood risk listTW1 1PY: not on the flood risk listTW1 1QB: not on the flood risk listTW1 1QD: not on the flood risk listTW1 1QE: not on the flood risk listTW1 1QF: not on the flood risk listTW1 1QG: not on the flood risk listTW1 1QH: not on the flood risk listTW1 1QQ: not on the flood risk listTW1 1RA: not on the flood risk listTW1 1RB: not on the flood risk listTW1 1RD: not on the flood risk listTW1 1RE: not on the flood risk listTW1 1RF: not on the flood risk listTW1 1RG: not on the flood risk listTW1 1RJ: not on the flood risk listTW1 1RL: not on the flood risk listTW1 1RQ: not on the flood risk listTW1 1RR: not on the flood risk listTW1 1RS: not on the flood risk listTW1 1RT: not on the flood risk listTW1 1RW: not on the flood risk listTW1 1SD: not on the flood risk listTW1 2AH: not on the flood risk listTW1 2AJ: not on the flood risk listTW1 2AL: not on the flood risk listTW1 2AN: not on the flood risk listTW1 2AP: not on the flood risk listTW1 2AR: not on the flood risk listTW1 2AS: not on the flood risk listTW1 2AW: not on the flood risk listTW1 2AX: not on the flood risk listTW1 2AY: not on the flood risk listTW1 2AZ: not on the flood risk listTW1 2BB: not on the flood risk listTW1 2BD: not on the flood risk listTW1 2BE: not on the flood risk listTW1 2BQ: not on the flood risk listTW1 2BT: not on the flood risk listTW1 2BU: not on the flood risk listTW1 2DE: not on the flood risk listTW1 2DF: not on the flood risk listTW1 2DG: not on the flood risk listTW1 2DH: not on the flood risk listTW1 2DJ: not on the flood risk listTW1 2DL: not on the flood risk listTW1 2DQ: not on the flood risk listTW1 2DS: not on the flood risk listTW1 2DT: not on the flood risk listTW1 2DU: not on the flood risk listTW1 2EJ: not on the flood risk listTW1 2ER: not on the flood risk listTW1 2HE: not on the flood risk listTW1 2JB: not on the flood risk listTW1 2JD: not on the flood risk listTW1 2JE: not on the flood risk listTW1 2JF: not on the flood risk listTW1 2JG: not on the flood risk listTW1 2JH: not on the flood risk listTW1 2JJ: not on the flood risk listTW1 2JL: not on the flood risk listTW1 2JN: not on the flood risk listTW1 2JQ: not on the flood risk listTW1 2JR: not on the flood risk listTW1 2JS: not on the flood risk listTW1 2JT: not on the flood risk listTW1 2JU: not on the flood risk listTW1 2JX: not on the flood risk listTW1 2JY: not on the flood risk listTW1 2JZ: not on the flood risk listTW1 2LB: not on the flood risk listTW1 2LE: not on the flood risk listTW1 2LH: not on the flood risk listTW1 2LJ: not on the flood risk listTW1 2LL: not on the flood risk listTW1 2LN: not on the flood risk listTW1 2LP: not on the flood risk listTW1 2LR: not on the flood risk listTW1 2LS: not on the flood risk listTW1 2LT: not on the flood risk listTW1 2LU: not on the flood risk listTW1 2LW: not on the flood risk listTW1 2LX: not on the flood risk listTW1 2LY: not on the flood risk listTW1 2NG: not on the flood risk listTW1 2NH: not on the flood risk listTW1 2NJ: not on the flood risk listTW1 2NL: not on the flood risk listTW1 2NN: not on the flood risk listTW1 2NP: not on the flood risk listTW1 2NS: not on the flood risk listTW1 2NT: not on the flood risk listTW1 2PF: not on the flood risk listTW1 2PG: not on the flood risk listTW1 2PJ: not on the flood risk listTW1 2PQ: not on the flood risk listTW1 2PS: not on the flood risk listTW1 2PU: not on the flood risk listTW1 2QS: not on the flood risk listTW1 2QT: not on the flood risk listTW1 2QU: not on the flood risk listTW1 2QX: not on the flood risk listTW1 2QY: not on the flood risk listTW1 2TG: not on the flood risk listTW1 2TH: not on the flood risk listTW1 2TJ: not on the flood risk listTW1 2TP: not on the flood risk listTW1 2TX: not on the flood risk listTW1 3AA: not on the flood risk listTW1 3AB: not on the flood risk listTW1 3AD: not on the flood risk listTW1 3AE: not on the flood risk listTW1 3AF: not on the flood risk listTW1 3AG: not on the flood risk listTW1 3AH: not on the flood risk listTW1 3AJ: not on the flood risk listTW1 3AL: not on the flood risk listTW1 3AN: not on the flood risk listTW1 3AP: not on the flood risk listTW1 3AQ: not on the flood risk listTW1 3AR: not on the flood risk listTW1 3AS: not on the flood risk listTW1 3AT: not on the flood risk listTW1 3AU: not on the flood risk listTW1 3AW: not on the flood risk listTW1 3AX: not on the flood risk listTW1 3AY: not on the flood risk listTW1 3BA: not on the flood risk listTW1 3BE: not on the flood risk listTW1 3BF: not on the flood risk listTW1 3BH: not on the flood risk listTW1 3BW: not on the flood risk listTW1 3BZ: not on the flood risk listTW1 3DA: not on the flood risk listTW1 3DB: not on the flood risk listTW1 3DD: not on the flood risk listTW1 3DE: not on the flood risk listTW1 3DF: not on the flood risk listTW1 3EG: not on the flood risk listTW1 3EH: not on the flood risk listTW1 3EJ: not on the flood risk listTW1 3EP: not on the flood risk listTW1 3EQ: not on the flood risk listTW1 3ER: not on the flood risk listTW1 3ES: not on the flood risk listTW1 3EW: not on the flood risk listTW1 3EX: not on the flood risk listTW1 3HB: not on the flood risk listTW1 3HD: not on the flood risk listTW1 3HE: not on the flood risk listTW1 3HG: not on the flood risk listTW1 3HH: not on the flood risk listTW1 3HJ: not on the flood risk listTW1 3HP: not on the flood risk listTW1 3HQ: not on the flood risk listTW1 3HR: not on the flood risk listTW1 3HT: not on the flood risk listTW1 3HW: not on the flood risk listTW1 3JB: not on the flood risk listTW1 3JD: not on the flood risk listTW1 3JF: not on the flood risk listTW1 3JS: not on the flood risk listTW1 3JT: not on the flood risk listTW1 3JU: not on the flood risk listTW1 3JZ: not on the flood risk listTW1 3LD: not on the flood risk listTW1 3LJ: not on the flood risk listTW1 3LP: not on the flood risk listTW1 3LS: not on the flood risk listTW1 3ND: not on the flood risk listTW1 3NE: not on the flood risk listTW1 3NF: not on the flood risk listTW1 3NG: not on the flood risk listTW1 3NH: not on the flood risk listTW1 3NZ: not on the flood risk listTW1 3PA: not on the flood risk listTW1 3PB: not on the flood risk listTW1 3QS: not on the flood risk listTW1 3RJ: not on the flood risk listTW1 3RP: not on the flood risk listTW1 3RR: not on the flood risk listTW1 3RZ: not on the flood risk listTW1 3SD: not on the flood risk listTW1 3SE: not on the flood risk listTW1 3SG: not on the flood risk listTW1 3SH: not on the flood risk listTW1 3SN: not on the flood risk listTW1 3SX: not on the flood risk listTW1 3SY: not on the flood risk listTW1 3SZ: not on the flood risk listTW1 4AD: not on the flood risk listTW1 4AE: not on the flood risk listTW1 4AF: not on the flood risk listTW1 4AG: not on the flood risk listTW1 4AJ: not on the flood risk listTW1 4AQ: not on the flood risk listTW1 4AS: not on the flood risk listTW1 4AT: not on the flood risk listTW1 4AW: not on the flood risk listTW1 4AX: not on the flood risk listTW1 4AZ: not on the flood risk listTW1 4BB: not on the flood risk listTW1 4BF: not on the flood risk listTW1 4BH: not on the flood risk listTW1 4BN: not on the flood risk listTW1 4BP: not on the flood risk listTW1 4BQ: not on the flood risk listTW1 4BW: not on the flood risk listTW1 4BX: not on the flood risk listTW1 4BY: not on the flood risk listTW1 4BZ: not on the flood risk listTW1 4DB: not on the flood risk listTW1 4DG: not on the flood risk listTW1 4DH: not on the flood risk listTW1 4DN: not on the flood risk listTW1 4DP: not on the flood risk listTW1 4DQ: not on the flood risk listTW1 4DS: not on the flood risk listTW1 4EA: not on the flood risk listTW1 4EG: not on the flood risk listTW1 4EN: not on the flood risk listTW1 4ES: not on the flood risk listTW1 4ET: not on the flood risk listTW1 4EU: not on the flood risk listTW1 4EX: not on the flood risk listTW1 4EY: not on the flood risk listTW1 4EZ: not on the flood risk listTW1 4HB: not on the flood risk listTW1 4HD: not on the flood risk listTW1 4HE: not on the flood risk listTW1 4HF: not on the flood risk listTW1 4HG: not on the flood risk listTW1 4HH: not on the flood risk listTW1 4HJ: not on the flood risk listTW1 4HQ: not on the flood risk listTW1 4HR: not on the flood risk listTW1 4HS: not on the flood risk listTW1 4HT: not on the flood risk listTW1 4HU: not on the flood risk listTW1 4HW: not on the flood risk listTW1 4HX: not on the flood risk listTW1 4HY: not on the flood risk listTW1 4HZ: not on the flood risk listTW1 4JA: not on the flood risk listTW1 4JB: not on the flood risk listTW1 4JF: not on the flood risk listTW1 4JG: not on the flood risk listTW1 4JH: not on the flood risk listTW1 4JJ: not on the flood risk listTW1 4JP: not on the flood risk listTW1 4JQ: not on the flood risk listTW1 4JR: not on the flood risk listTW1 4JT: not on the flood risk listTW1 4JU: not on the flood risk listTW1 4JW: not on the flood risk listTW1 4JX: not on the flood risk listTW1 4JY: not on the flood risk listTW1 4JZ: not on the flood risk listTW1 4LA: not on the flood risk listTW1 4LE: not on the flood risk listTW1 4LG: not on the flood risk listTW1 4LJ: not on the flood risk listTW1 4LL: not on the flood risk listTW1 4LR: not on the flood risk listTW1 4LS: not on the flood risk listTW1 4LU: not on the flood risk listTW1 4LX: not on the flood risk listTW1 4LY: not on the flood risk listTW1 4LZ: not on the flood risk listTW1 4NA: not on the flood risk listTW1 4NB: not on the flood risk listTW1 4ND: not on the flood risk listTW1 4NE: not on the flood risk listTW1 4NF: not on the flood risk listTW1 4NG: not on the flood risk listTW1 4NH: not on the flood risk listTW1 4NJ: not on the flood risk listTW1 4NL: not on the flood risk listTW1 4NQ: not on the flood risk listTW1 4PB: not on the flood risk listTW1 4PD: not on the flood risk listTW1 4PE: not on the flood risk listTW1 4PG: not on the flood risk listTW1 4PH: not on the flood risk listTW1 4PJ: not on the flood risk listTW1 4PL: not on the flood risk listTW1 4PP: not on the flood risk listTW1 4PQ: not on the flood risk listTW1 4PT: not on the flood risk listTW1 4PU: not on the flood risk listTW1 4PW: not on the flood risk listTW1 4PX: not on the flood risk listTW1 4PY: not on the flood risk listTW1 4PZ: not on the flood risk listTW1 4QA: not on the flood risk listTW1 4QB: not on the flood risk listTW1 4QD: not on the flood risk listTW1 4QN: not on the flood risk listTW1 4QP: not on the flood risk listTW1 4QR: not on the flood risk listTW1 4QS: not on the flood risk listTW1 4QT: not on the flood risk listTW1 4QU: not on the flood risk listTW1 4QW: not on the flood risk listTW1 4QX: not on the flood risk listTW1 4QY: not on the flood risk listTW1 4QZ: not on the flood risk listTW1 4RA: not on the flood risk listTW1 4RE: not on the flood risk listTW1 4RF: not on the flood risk listTW1 4RG: not on the flood risk listTW1 4RL: not on the flood risk listTW1 4RQ: not on the flood risk listTW1 4RT: not on the flood risk listTW1 4SU: not on the flood risk listTW1 4SX: not on the flood risk listTW1 4SY: not on the flood risk listTW1 4SZ: not on the flood risk listTW1 4TA: not on the flood risk listTW1 4TB: not on the flood risk listTW1 4TD: not on the flood risk listTW1 4TE: not on the flood risk listTW1 4TF: not on the flood risk listTW1 4TG: not on the flood risk listTW1 4TH: not on the flood risk listTW1 4TL: not on the flood risk listTW1 4TN: not on the flood risk listTW1 4TP: not on the flood risk listTW1 4TT: not on the flood risk listTW1 9SD: not on the flood risk listTW1 1AR: very low flood risk onlyTW1 1BD: very low flood risk onlyTW1 1FA: very low flood risk onlyTW1 1FF: very low flood risk onlyTW1 1JN: very low flood risk onlyTW1 1JP: very low flood risk onlyTW1 1JT: very low flood risk onlyTW1 1JU: very low flood risk onlyTW1 1JW: very low flood risk onlyTW1 1JY: very low flood risk onlyTW1 1LA: very low flood risk onlyTW1 1LB: very low flood risk onlyTW1 1LD: very low flood risk onlyTW1 1LE: very low flood risk onlyTW1 1LF: very low flood risk onlyTW1 1PH: very low flood risk onlyTW1 1PW: very low flood risk onlyTW1 1PZ: very low flood risk onlyTW1 1QJ: very low flood risk onlyTW1 1QL: very low flood risk onlyTW1 1QN: very low flood risk onlyTW1 1QT: very low flood risk onlyTW1 1RH: very low flood risk onlyTW1 2AA: very low flood risk onlyTW1 2AT: very low flood risk onlyTW1 2AU: very low flood risk onlyTW1 2BG: very low flood risk onlyTW1 2BS: very low flood risk onlyTW1 2NQ: very low flood risk onlyTW1 2PB: very low flood risk onlyTW1 2PD: very low flood risk onlyTW1 2PT: very low flood risk onlyTW1 2QB: very low flood risk onlyTW1 2TE: very low flood risk onlyTW1 3EE: very low flood risk onlyTW1 3EL: very low flood risk onlyTW1 3EN: very low flood risk onlyTW1 3HN: very low flood risk onlyTW1 3HS: very low flood risk onlyTW1 3HU: very low flood risk onlyTW1 3HX: very low flood risk onlyTW1 3HY: very low flood risk onlyTW1 3JA: very low flood risk onlyTW1 3NJ: very low flood risk onlyTW1 3SP: very low flood risk onlyTW1 1AG: low flood risk at worstTW1 1AN: low flood risk at worstTW1 1AP: low flood risk at worstTW1 1AS: low flood risk at worstTW1 1DB: low flood risk at worstTW1 1DE: low flood risk at worstTW1 1DF: low flood risk at worstTW1 1DG: low flood risk at worstTW1 1EB: low flood risk at worstTW1 1HP: low flood risk at worstTW1 1HR: low flood risk at worstTW1 1HS: low flood risk at worstTW1 1HT: low flood risk at worstTW1 1HW: low flood risk at worstTW1 1JE: low flood risk at worstTW1 1JF: low flood risk at worstTW1 1JG: low flood risk at worstTW1 1JQ: low flood risk at worstTW1 1JR: low flood risk at worstTW1 1JS: low flood risk at worstTW1 1JX: low flood risk at worstTW1 1LG: low flood risk at worstTW1 1LH: low flood risk at worstTW1 1LQ: low flood risk at worstTW1 1LY: low flood risk at worstTW1 1NF: low flood risk at worstTW1 1NZ: low flood risk at worstTW1 1PA: low flood risk at worstTW1 1PB: low flood risk at worstTW1 1PD: low flood risk at worstTW1 1PE: low flood risk at worstTW1 1PF: low flood risk at worstTW1 1PP: low flood risk at worstTW1 1PQ: low flood risk at worstTW1 1QP: low flood risk at worstTW1 1QR: low flood risk at worstTW1 1QS: low flood risk at worstTW1 1QU: low flood risk at worstTW1 1QW: low flood risk at worstTW1 1QX: low flood risk at worstTW1 1QY: low flood risk at worstTW1 1RP: low flood risk at worstTW1 1RU: low flood risk at worstTW1 1RX: low flood risk at worstTW1 1RY: low flood risk at worstTW1 2AG: low flood risk at worstTW1 2BX: low flood risk at worstTW1 2BZ: low flood risk at worstTW1 2DA: low flood risk at worstTW1 2DB: low flood risk at worstTW1 2DX: low flood risk at worstTW1 2DY: low flood risk at worstTW1 2DZ: low flood risk at worstTW1 2EA: low flood risk at worstTW1 2EB: low flood risk at worstTW1 2EF: low flood risk at worstTW1 2EL: low flood risk at worstTW1 2EX: low flood risk at worstTW1 2HF: low flood risk at worstTW1 2HG: low flood risk at worstTW1 2HH: low flood risk at worstTW1 2HL: low flood risk at worstTW1 2HN: low flood risk at worstTW1 2HQ: low flood risk at worstTW1 2HR: low flood risk at worstTW1 2HS: low flood risk at worstTW1 2HT: low flood risk at worstTW1 2HU: low flood risk at worstTW1 2HY: low flood risk at worstTW1 2HZ: low flood risk at worstTW1 2JA: low flood risk at worstTW1 2JP: low flood risk at worstTW1 2PX: low flood risk at worstTW1 2PY: low flood risk at worstTW1 2QA: low flood risk at worstTW1 2QD: low flood risk at worstTW1 2QE: low flood risk at worstTW1 2QF: low flood risk at worstTW1 2QH: low flood risk at worstTW1 2QJ: low flood risk at worstTW1 2QN: low flood risk at worstTW1 2TA: low flood risk at worstTW1 2TB: low flood risk at worstTW1 2TD: low flood risk at worstTW1 2TF: low flood risk at worstTW1 2TL: low flood risk at worstTW1 2TN: low flood risk at worstTW1 2TQ: low flood risk at worstTW1 2TR: low flood risk at worstTW1 2TS: low flood risk at worstTW1 2TT: low flood risk at worstTW1 2TU: low flood risk at worstTW1 2TW: low flood risk at worstTW1 2TY: low flood risk at worstTW1 3BB: low flood risk at worstTW1 3DG: low flood risk at worstTW1 3DH: low flood risk at worstTW1 3DP: low flood risk at worstTW1 3DQ: low flood risk at worstTW1 3NP: low flood risk at worstTW1 3NU: low flood risk at worstTW1 4PA: low flood risk at worstTW1 4PS: low flood risk at worstTW1 4QJ: low flood risk at worstTW1 4RB: low flood risk at worstTW1 4SG: low flood risk at worstTW1 3BJ: medium flood risk at worstTW1 3DJ: medium flood risk at worstTW1 3DR: medium flood risk at worstTW1 3DS: medium flood risk at worstTW1 3DT: medium flood risk at worstTW1 3DW: medium flood risk at worstTW1 3DX: medium flood risk at worstTW1 3NR: medium flood risk at worstTW1 3NX: medium flood risk at worstTW1 3NY: medium flood risk at worstTW1 4RU: medium flood risk at worstTW1 4SB: medium flood risk at worstTW1 4SD: medium flood risk at worstTW1 4SE: medium flood risk at worstTW1 4SF: medium flood risk at worstTW1 4SH: medium flood risk at worstTW1 4SL: medium flood risk at worstTW1 4SQ: medium flood risk at worstTW1 4SR: medium flood risk at worstTW1 4ST: medium flood risk at worstTW1 4TJ: medium flood risk at worstTW1 4TQ: medium flood risk at worstTW1 4TR: medium flood risk at worstTW1 1DD: high flood riskTW1 1ES: high flood riskTW1 1JD: high flood riskTW1 1QZ: high flood riskTW1 2DD: high flood riskTW1 2QG: high flood riskTW1 3BL: high flood riskTW1 3DL: high flood riskTW1 3DN: high flood riskTW1 3DU: high flood riskTW1 3DY: high flood riskTW1 3EA: high flood riskTW1 4QG: high flood riskTW1 4QH: high flood riskTW1 4QL: high flood riskTW1 4RP: high flood riskTW1 4RX: high flood riskTW1 4RY: high flood riskTW1 4SJ: high flood riskTW1 4SW: high flood risk Richmond upon Thames 11 postcodes at high or medium risk, outlined: this goes to TW1 4SW, the one with most homes and businesses at high risk11 postcodes at high or medium risk9 postcodes at high or medium risk, outlined: this goes to TW1 3DY, the one with most homes and businesses at high risk9 postcodes at high or medium risk8 postcodes at high or medium risk, outlined: this goes to TW1 4RX, 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 TW1 3DL, the one with most homes and businesses at high risk7 postcodes at high or medium risk Map of every postcode in TW1, by flood risk Of the 665 postcodes in TW1 that ONS places, 20 have a home or business at high risk, 23 are at medium risk at worst, 107 are at low risk at worst, 46 are at very low risk only and 469 are not on the Environment Agency's at-risk list. 4 groups of postcodes at high or medium risk are outlined: 11 postcodes at high or medium risk; 9 postcodes at high or medium risk; 8 postcodes at high or medium risk; 7 postcodes at high or medium risk. Places named: Richmond upon Thames. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A316 Richmond upon Thames 7 postcodes at high or medium risk, outlined: this goes to TW1 3DL, the one with most homes and businesses at high risk7 postcodes at high or medium risk
  • A home or business at high risk: 20
  • At medium risk at worst: 23
  • At low risk at worst: 107
  • At very low risk only: 46
  • Not on the at-risk list: 469
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 665 postcodes in TW1 that ONS places, 20 have a home or business at high risk, 23 are at medium risk at worst, 107 are at low risk at worst, 46 are at very low risk only and 469 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 51.4510, longitude -0.3254. 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

20 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.

TW1 3DY90 at high riskTW1 2DD39 at high riskTW1 3EA19 at high riskTW1 4RX11 at high riskTW1 3DL6 at high riskTW1 4QH6 at high riskTW1 3DU5 at high riskTW1 4QG4 at high riskTW1 4SW3 at high riskTW1 4SJ2 at high riskTW1 4RP2 at high riskTW1 3BL2 at high risk

Where the postcodes at high or medium risk lie together

  • 11 postcodes at high or medium risk, outlined on the map. TW1 4SW, is the one with most homes and businesses at high risk.
  • 9 postcodes at high or medium risk, outlined on the map. TW1 3DY, is the one with most homes and businesses at high risk.
  • 8 postcodes at high or medium risk, outlined on the map. TW1 4RX, is the one with most homes and businesses at high risk.
  • 7 postcodes at high or medium risk, outlined on the map. TW1 3DL, is the one with most homes and businesses at high risk.

What broadband can you get in TW1?

Ofcom reports on 622 of the 665 postcodes in TW1. At 485 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit485 of 622
Postcodes where every home can get superfast561 of 622

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 TW1 at risk of flooding?

196 of the 665 postcodes in TW1 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 617 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 196 of 665 postcodes High: 199Medium: 418Low: 1,419Very low: 769

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 TW1?

Homes in TW1 sold for a typical £740,000 in the 12 months to August 2026, across 311 sales, up 8% on the 12 months before, HM Land Registry's figures show.

£740,000 typical price, the 12 months to August 2026
12 months to August 2025
£685,000
12 months to August 2026
£740,000

▲ up 8% on the 12 months before

Detached£1,600,000 13 sales
Semi-detached£1,320,000 51 sales
Terraced£1,051,600 101 sales
Flat or maisonette£487,500 146 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 TW1

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

TW1 1177 postcodesTW1 2151 postcodesTW1 3122 postcodesTW1 4168 postcodesTW1 947 postcodes
UK postcode format explained

Places in TW1

Towns and villages with postcodes in TW1, and how many each has here.

Richmond upon Thames postcodes,625Hounslow postcodes,40

Who covers TW1

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

  • Twickenham626
  • Brentford and Isleworth39

Police force areas

  • Metropolitan Police665

Next to TW1

TW2 postcode district All TW districts Richmond upon Thames postcodes

"Next to" is by number: the district after TW1 in the TW area.

Check a postcode

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