TW3 postcode district: Hounslow and around

TW3 is a postcode district in England, with 787 postcodes in use in 5 sectors. It has postcodes in Hounslow and Richmond upon Thames. It is split between 2 councils: Hounslow (759 postcodes) and Richmond upon Thames (28).

Postcodes in use
787
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 TW3, by flood risk

Map of every postcode in TW3, by flood risk Of the 787 postcodes in TW3 that ONS places, 787 are not on the Environment Agency's at-risk list. Places named: Hounslow. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A4 TW3 1AA: not on the flood risk listTW3 1AE: not on the flood risk listTW3 1AG: not on the flood risk listTW3 1AH: not on the flood risk listTW3 1AJ: not on the flood risk listTW3 1AL: not on the flood risk listTW3 1AN: not on the flood risk listTW3 1AQ: not on the flood risk listTW3 1AR: not on the flood risk listTW3 1AS: not on the flood risk listTW3 1AT: not on the flood risk listTW3 1AU: not on the flood risk listTW3 1AW: not on the flood risk listTW3 1AX: not on the flood risk listTW3 1AY: not on the flood risk listTW3 1AZ: not on the flood risk listTW3 1BA: not on the flood risk listTW3 1BF: not on the flood risk listTW3 1BG: not on the flood risk listTW3 1BH: not on the flood risk listTW3 1BL: not on the flood risk listTW3 1BN: not on the flood risk listTW3 1BQ: not on the flood risk listTW3 1BT: not on the flood risk listTW3 1BX: not on the flood risk listTW3 1BY: not on the flood risk listTW3 1DA: not on the flood risk listTW3 1DH: not on the flood risk listTW3 1DJ: not on the flood risk listTW3 1DL: not on the flood risk listTW3 1DQ: not on the flood risk listTW3 1DT: not on the flood risk listTW3 1DU: not on the flood risk listTW3 1DY: not on the flood risk listTW3 1DZ: not on the flood risk listTW3 1EA: not on the flood risk listTW3 1EB: not on the flood risk listTW3 1ED: not on the flood risk listTW3 1EE: not on the flood risk listTW3 1EF: not on the flood risk listTW3 1EH: not on the flood risk listTW3 1EL: not on the flood risk listTW3 1ER: not on the flood risk listTW3 1ES: not on the flood risk listTW3 1EU: not on the flood risk listTW3 1EX: not on the flood risk listTW3 1EZ: not on the flood risk listTW3 1FA: not on the flood risk listTW3 1GA: not on the flood risk listTW3 1GB: not on the flood risk listTW3 1GD: not on the flood risk listTW3 1GE: not on the flood risk listTW3 1GH: not on the flood risk listTW3 1GJ: not on the flood risk listTW3 1GN: not on the flood risk listTW3 1HA: not on the flood risk listTW3 1HB: not on the flood risk listTW3 1HE: not on the flood risk listTW3 1HG: not on the flood risk listTW3 1HH: not on the flood risk listTW3 1HL: not on the flood risk listTW3 1JA: not on the flood risk listTW3 1JG: not on the flood risk listTW3 1JH: not on the flood risk listTW3 1JL: not on the flood risk listTW3 1JQ: not on the flood risk listTW3 1JS: not on the flood risk listTW3 1JX: not on the flood risk listTW3 1JY: not on the flood risk listTW3 1JZ: not on the flood risk listTW3 1LA: not on the flood risk listTW3 1LB: not on the flood risk listTW3 1LD: not on the flood risk listTW3 1LG: not on the flood risk listTW3 1LH: not on the flood risk listTW3 1LJ: not on the flood risk listTW3 1LQ: not on the flood risk listTW3 1LR: not on the flood risk listTW3 1LS: not on the flood risk listTW3 1LX: not on the flood risk listTW3 1LY: not on the flood risk listTW3 1NA: not on the flood risk listTW3 1NB: not on the flood risk listTW3 1NF: not on the flood risk listTW3 1NH: not on the flood risk listTW3 1NP: not on the flood risk listTW3 1NS: not on the flood risk listTW3 1NT: not on the flood risk listTW3 1NU: not on the flood risk listTW3 1NW: not on the flood risk listTW3 1NX: not on the flood risk listTW3 1PA: not on the flood risk listTW3 1PB: not on the flood risk listTW3 1PE: not on the flood risk listTW3 1PG: not on the flood risk listTW3 1PH: not on the flood risk listTW3 1PJ: not on the flood risk listTW3 1PL: not on the flood risk listTW3 1PN: not on the flood risk listTW3 1PP: not on the flood risk listTW3 1PQ: not on the flood risk listTW3 1PS: not on the flood risk listTW3 1PT: not on the flood risk listTW3 1PU: not on the flood risk listTW3 1PW: not on the flood risk listTW3 1PX: not on the flood risk listTW3 1QA: not on the flood risk listTW3 1QB: not on the flood risk listTW3 1QD: not on the flood risk listTW3 1QE: not on the flood risk listTW3 1QG: not on the flood risk listTW3 1QH: not on the flood risk listTW3 1QJ: not on the flood risk listTW3 1QL: not on the flood risk listTW3 1QP: not on the flood risk listTW3 1QQ: not on the flood risk listTW3 1QR: not on the flood risk listTW3 1QS: not on the flood risk listTW3 1QT: not on the flood risk listTW3 1QU: not on the flood risk listTW3 1QX: not on the flood risk listTW3 1QZ: not on the flood risk listTW3 1RB: not on the flood risk listTW3 1RF: not on the flood risk listTW3 1RH: not on the flood risk listTW3 1RS: not on the flood risk listTW3 1RZ: not on the flood risk listTW3 1SB: not on the flood risk listTW3 1SD: not on the flood risk listTW3 1SE: not on the flood risk listTW3 1SF: not on the flood risk listTW3 1SG: not on the flood risk listTW3 1SJ: not on the flood risk listTW3 1SL: not on the flood risk listTW3 1SN: not on the flood risk listTW3 1SP: not on the flood risk listTW3 1SQ: not on the flood risk listTW3 1SR: not on the flood risk listTW3 1SS: not on the flood risk listTW3 1SU: not on the flood risk listTW3 1SW: not on the flood risk listTW3 1SX: not on the flood risk listTW3 1SY: not on the flood risk listTW3 1SZ: not on the flood risk listTW3 1TT: not on the flood risk listTW3 1UA: not on the flood risk listTW3 1UE: not on the flood risk listTW3 1UF: not on the flood risk listTW3 1UG: not on the flood risk listTW3 1UL: not on the flood risk listTW3 1UN: not on the flood risk listTW3 1UP: not on the flood risk listTW3 1UQ: not on the flood risk listTW3 1UW: not on the flood risk listTW3 1UX: not on the flood risk listTW3 1UY: not on the flood risk listTW3 1UZ: not on the flood risk listTW3 1XA: not on the flood risk listTW3 1XB: not on the flood risk listTW3 1XD: not on the flood risk listTW3 1XE: not on the flood risk listTW3 1XF: not on the flood risk listTW3 1XG: not on the flood risk listTW3 1XH: not on the flood risk listTW3 1XJ: not on the flood risk listTW3 1XL: not on the flood risk listTW3 1XN: not on the flood risk listTW3 1XP: not on the flood risk listTW3 1XQ: not on the flood risk listTW3 1XS: not on the flood risk listTW3 1XT: not on the flood risk listTW3 1XU: not on the flood risk listTW3 1XW: not on the flood risk listTW3 1XX: not on the flood risk listTW3 1XY: not on the flood risk listTW3 1XZ: not on the flood risk listTW3 1YA: not on the flood risk listTW3 1YE: not on the flood risk listTW3 1YF: not on the flood risk listTW3 1YG: not on the flood risk listTW3 1YH: not on the flood risk listTW3 1YJ: not on the flood risk listTW3 1YL: not on the flood risk listTW3 1YN: not on the flood risk listTW3 1YQ: not on the flood risk listTW3 1YR: not on the flood risk listTW3 1YS: not on the flood risk listTW3 1YT: not on the flood risk listTW3 1YU: not on the flood risk listTW3 1YW: not on the flood risk listTW3 1YX: not on the flood risk listTW3 1YY: not on the flood risk listTW3 2AA: not on the flood risk listTW3 2AD: not on the flood risk listTW3 2AG: not on the flood risk listTW3 2AH: not on the flood risk listTW3 2AL: not on the flood risk listTW3 2AN: not on the flood risk listTW3 2AP: not on the flood risk listTW3 2AQ: not on the flood risk listTW3 2AT: not on the flood risk listTW3 2AU: not on the flood risk listTW3 2AX: not on the flood risk listTW3 2AY: not on the flood risk listTW3 2BA: not on the flood risk listTW3 2BD: not on the flood risk listTW3 2BE: not on the flood risk listTW3 2BG: not on the flood risk listTW3 2BH: not on the flood risk listTW3 2BJ: not on the flood risk listTW3 2BL: not on the flood risk listTW3 2BN: not on the flood risk listTW3 2BP: not on the flood risk listTW3 2BQ: not on the flood risk listTW3 2BS: not on the flood risk listTW3 2BT: not on the flood risk listTW3 2BW: not on the flood risk listTW3 2DA: not on the flood risk listTW3 2DB: not on the flood risk listTW3 2DD: not on the flood risk listTW3 2DE: not on the flood risk listTW3 2DF: not on the flood risk listTW3 2DG: not on the flood risk listTW3 2DH: not on the flood risk listTW3 2DL: not on the flood risk listTW3 2DP: not on the flood risk listTW3 2DQ: not on the flood risk listTW3 2DR: not on the flood risk listTW3 2DS: not on the flood risk listTW3 2DT: not on the flood risk listTW3 2DU: not on the flood risk listTW3 2DW: not on the flood risk listTW3 2DX: not on the flood risk listTW3 2DY: not on the flood risk listTW3 2DZ: not on the flood risk listTW3 2EA: not on the flood risk listTW3 2EB: not on the flood risk listTW3 2EG: not on the flood risk listTW3 2EH: not on the flood risk listTW3 2EJ: not on the flood risk listTW3 2EL: not on the flood risk listTW3 2EN: not on the flood risk listTW3 2EP: not on the flood risk listTW3 2ES: not on the flood risk listTW3 2EU: not on the flood risk listTW3 2EW: not on the flood risk listTW3 2EX: not on the flood risk listTW3 2EY: not on the flood risk listTW3 2EZ: not on the flood risk listTW3 2HA: not on the flood risk listTW3 2HB: not on the flood risk listTW3 2HD: not on the flood risk listTW3 2HE: not on the flood risk listTW3 2HF: not on the flood risk listTW3 2HG: not on the flood risk listTW3 2HH: not on the flood risk listTW3 2HJ: not on the flood risk listTW3 2HL: not on the flood risk listTW3 2HN: not on the flood risk listTW3 2HP: not on the flood risk listTW3 2HQ: not on the flood risk listTW3 2HW: not on the flood risk listTW3 2JA: not on the flood risk listTW3 2JB: not on the flood risk listTW3 2JD: not on the flood risk listTW3 2JE: not on the flood risk listTW3 2JF: not on the flood risk listTW3 2JG: not on the flood risk listTW3 2JH: not on the flood risk listTW3 2JJ: not on the flood risk listTW3 2JL: not on the flood risk listTW3 2JN: not on the flood risk listTW3 2JP: not on the flood risk listTW3 2JQ: not on the flood risk listTW3 2JR: not on the flood risk listTW3 2JS: not on the flood risk listTW3 2JT: not on the flood risk listTW3 2JU: not on the flood risk listTW3 2JX: not on the flood risk listTW3 2JY: not on the flood risk listTW3 2LE: not on the flood risk listTW3 2LF: not on the flood risk listTW3 2LG: not on the flood risk listTW3 2LH: not on the flood risk listTW3 2LJ: not on the flood risk listTW3 2LL: not on the flood risk listTW3 2LN: not on the flood risk listTW3 2LP: not on the flood risk listTW3 2LQ: not on the flood risk listTW3 2LR: not on the flood risk listTW3 2LS: not on the flood risk listTW3 2LT: not on the flood risk listTW3 2LU: not on the flood risk listTW3 2LW: not on the flood risk listTW3 2LX: not on the flood risk listTW3 2LY: not on the flood risk listTW3 2LZ: not on the flood risk listTW3 2NA: not on the flood risk listTW3 2NB: not on the flood risk listTW3 2NE: not on the flood risk listTW3 2NH: not on the flood risk listTW3 2NJ: not on the flood risk listTW3 2NL: not on the flood risk listTW3 2NN: not on the flood risk listTW3 2NP: not on the flood risk listTW3 2NR: not on the flood risk listTW3 2NS: not on the flood risk listTW3 2NT: not on the flood risk listTW3 2NU: not on the flood risk listTW3 2NW: not on the flood risk listTW3 2NX: not on the flood risk listTW3 2PA: not on the flood risk listTW3 2PB: not on the flood risk listTW3 2PD: not on the flood risk listTW3 2PE: not on the flood risk listTW3 2PF: not on the flood risk listTW3 2PJ: not on the flood risk listTW3 2PL: not on the flood risk listTW3 2PN: not on the flood risk listTW3 2PP: not on the flood risk listTW3 2PR: not on the flood risk listTW3 2PS: not on the flood risk listTW3 2PT: not on the flood risk listTW3 2PU: not on the flood risk listTW3 2PW: not on the flood risk listTW3 2PX: not on the flood risk listTW3 2PY: not on the flood risk listTW3 2PZ: not on the flood risk listTW3 2QH: not on the flood risk listTW3 2QJ: not on the flood risk listTW3 2QL: not on the flood risk listTW3 2QP: not on the flood risk listTW3 2QR: not on the flood risk listTW3 2QT: not on the flood risk listTW3 2QU: not on the flood risk listTW3 2QW: not on the flood risk listTW3 2QX: not on the flood risk listTW3 2RA: not on the flood risk listTW3 2RB: not on the flood risk listTW3 2RD: not on the flood risk listTW3 2RE: not on the flood risk listTW3 2RF: not on the flood risk listTW3 2RG: not on the flood risk listTW3 2RH: not on the flood risk listTW3 2RJ: not on the flood risk listTW3 2RQ: not on the flood risk listTW3 3AA: not on the flood risk listTW3 3AB: not on the flood risk listTW3 3AD: not on the flood risk listTW3 3AE: not on the flood risk listTW3 3AF: not on the flood risk listTW3 3AG: not on the flood risk listTW3 3AH: not on the flood risk listTW3 3AJ: not on the flood risk listTW3 3AL: not on the flood risk listTW3 3AN: not on the flood risk listTW3 3AP: not on the flood risk listTW3 3AQ: not on the flood risk listTW3 3AR: not on the flood risk listTW3 3AS: not on the flood risk listTW3 3AT: not on the flood risk listTW3 3AW: not on the flood risk listTW3 3BB: not on the flood risk listTW3 3BD: not on the flood risk listTW3 3BJ: not on the flood risk listTW3 3BN: not on the flood risk listTW3 3BP: not on the flood risk listTW3 3BS: not on the flood risk listTW3 3BT: not on the flood risk listTW3 3BU: not on the flood risk listTW3 3BW: not on the flood risk listTW3 3DA: not on the flood risk listTW3 3DB: not on the flood risk listTW3 3DD: not on the flood risk listTW3 3DE: not on the flood risk listTW3 3DF: not on the flood risk listTW3 3DG: not on the flood risk listTW3 3DH: not on the flood risk listTW3 3DL: not on the flood risk listTW3 3DQ: not on the flood risk listTW3 3DU: not on the flood risk listTW3 3DW: not on the flood risk listTW3 3EB: not on the flood risk listTW3 3ED: not on the flood risk listTW3 3EH: not on the flood risk listTW3 3EJ: not on the flood risk listTW3 3EL: not on the flood risk listTW3 3EN: not on the flood risk listTW3 3EP: not on the flood risk listTW3 3EQ: not on the flood risk listTW3 3ER: not on the flood risk listTW3 3ES: not on the flood risk listTW3 3ET: not on the flood risk listTW3 3EW: not on the flood risk listTW3 3EX: not on the flood risk listTW3 3EY: not on the flood risk listTW3 3FF: not on the flood risk listTW3 3FG: not on the flood risk listTW3 3FH: not on the flood risk listTW3 3FJ: not on the flood risk listTW3 3FL: not on the flood risk listTW3 3FN: not on the flood risk listTW3 3FP: not on the flood risk listTW3 3FQ: not on the flood risk listTW3 3FR: not on the flood risk listTW3 3FS: not on the flood risk listTW3 3FT: not on the flood risk listTW3 3FU: not on the flood risk listTW3 3FW: not on the flood risk listTW3 3FX: not on the flood risk listTW3 3FY: not on the flood risk listTW3 3FZ: not on the flood risk listTW3 3GH: not on the flood risk listTW3 3GL: not on the flood risk listTW3 3GN: not on the flood risk listTW3 3GP: not on the flood risk listTW3 3GQ: not on the flood risk listTW3 3HH: not on the flood risk listTW3 3HP: not on the flood risk listTW3 3HW: not on the flood risk listTW3 3HY: not on the flood risk listTW3 3JB: not on the flood risk listTW3 3JJ: not on the flood risk listTW3 3JR: not on the flood risk listTW3 3JS: not on the flood risk listTW3 3JT: not on the flood risk listTW3 3JW: not on the flood risk listTW3 3JY: not on the flood risk listTW3 3JZ: not on the flood risk listTW3 3LF: not on the flood risk listTW3 3LH: not on the flood risk listTW3 3LJ: not on the flood risk listTW3 3LL: not on the flood risk listTW3 3LQ: not on the flood risk listTW3 3LR: not on the flood risk listTW3 3LS: not on the flood risk listTW3 3LU: not on the flood risk listTW3 3LX: not on the flood risk listTW3 3LZ: not on the flood risk listTW3 3NE: not on the flood risk listTW3 3NN: not on the flood risk listTW3 3NR: not on the flood risk listTW3 3NT: not on the flood risk listTW3 3NX: not on the flood risk listTW3 3PB: not on the flood risk listTW3 3PE: not on the flood risk listTW3 3PR: not on the flood risk listTW3 3PT: not on the flood risk listTW3 3PU: not on the flood risk listTW3 3PW: not on the flood risk listTW3 3PX: not on the flood risk listTW3 3PY: not on the flood risk listTW3 3PZ: not on the flood risk listTW3 3QB: not on the flood risk listTW3 3QD: not on the flood risk listTW3 3QE: not on the flood risk listTW3 3QF: not on the flood risk listTW3 3QG: not on the flood risk listTW3 3QH: not on the flood risk listTW3 3QJ: not on the flood risk listTW3 3QL: not on the flood risk listTW3 3QN: not on the flood risk listTW3 3QP: not on the flood risk listTW3 3QQ: not on the flood risk listTW3 3QR: not on the flood risk listTW3 3QS: not on the flood risk listTW3 3QT: not on the flood risk listTW3 3QU: not on the flood risk listTW3 3QW: not on the flood risk listTW3 3QX: not on the flood risk listTW3 3QY: not on the flood risk listTW3 3QZ: not on the flood risk listTW3 3RA: not on the flood risk listTW3 3RB: not on the flood risk listTW3 3RD: not on the flood risk listTW3 3RF: not on the flood risk listTW3 3RG: not on the flood risk listTW3 3RH: not on the flood risk listTW3 3RJ: not on the flood risk listTW3 3RL: not on the flood risk listTW3 3RN: not on the flood risk listTW3 3RP: not on the flood risk listTW3 3RQ: not on the flood risk listTW3 3RR: not on the flood risk listTW3 3RS: not on the flood risk listTW3 3RT: not on the flood risk listTW3 3RU: not on the flood risk listTW3 3RW: not on the flood risk listTW3 3RX: not on the flood risk listTW3 3RY: not on the flood risk listTW3 3RZ: not on the flood risk listTW3 3SA: not on the flood risk listTW3 3SB: not on the flood risk listTW3 3SD: not on the flood risk listTW3 3SE: not on the flood risk listTW3 3SF: not on the flood risk listTW3 3SG: not on the flood risk listTW3 3SH: not on the flood risk listTW3 3SJ: not on the flood risk listTW3 3SL: not on the flood risk listTW3 3SN: not on the flood risk listTW3 3SQ: not on the flood risk listTW3 3ST: not on the flood risk listTW3 3SU: not on the flood risk listTW3 3SW: not on the flood risk listTW3 3SX: not on the flood risk listTW3 3SY: not on the flood risk listTW3 3TD: not on the flood risk listTW3 3TE: not on the flood risk listTW3 3TF: not on the flood risk listTW3 3TG: not on the flood risk listTW3 3TJ: not on the flood risk listTW3 3TL: not on the flood risk listTW3 3TN: not on the flood risk listTW3 3TQ: not on the flood risk listTW3 3TR: not on the flood risk listTW3 3TS: not on the flood risk listTW3 3TT: not on the flood risk listTW3 3TU: not on the flood risk listTW3 3TX: not on the flood risk listTW3 3TY: not on the flood risk listTW3 3UA: not on the flood risk listTW3 3UD: not on the flood risk listTW3 3UE: not on the flood risk listTW3 3UH: not on the flood risk listTW3 3UJ: not on the flood risk listTW3 3UL: not on the flood risk listTW3 3UN: not on the flood risk listTW3 3UP: not on the flood risk listTW3 3UQ: not on the flood risk listTW3 3UW: not on the flood risk listTW3 3UZ: not on the flood risk listTW3 4AA: not on the flood risk listTW3 4AB: not on the flood risk listTW3 4AD: not on the flood risk listTW3 4AE: not on the flood risk listTW3 4AF: not on the flood risk listTW3 4AG: not on the flood risk listTW3 4AH: not on the flood risk listTW3 4AJ: not on the flood risk listTW3 4AL: not on the flood risk listTW3 4AN: not on the flood risk listTW3 4AP: not on the flood risk listTW3 4AQ: not on the flood risk listTW3 4AR: not on the flood risk listTW3 4AS: not on the flood risk listTW3 4AW: not on the flood risk listTW3 4AX: not on the flood risk listTW3 4AY: not on the flood risk listTW3 4AZ: not on the flood risk listTW3 4BB: not on the flood risk listTW3 4BD: not on the flood risk listTW3 4BE: not on the flood risk listTW3 4BF: not on the flood risk listTW3 4BG: not on the flood risk listTW3 4BJ: not on the flood risk listTW3 4BL: not on the flood risk listTW3 4BN: not on the flood risk listTW3 4BP: not on the flood risk listTW3 4BQ: not on the flood risk listTW3 4BS: not on the flood risk listTW3 4BT: not on the flood risk listTW3 4BU: not on the flood risk listTW3 4BW: not on the flood risk listTW3 4BX: not on the flood risk listTW3 4BZ: not on the flood risk listTW3 4DA: not on the flood risk listTW3 4DB: not on the flood risk listTW3 4DD: not on the flood risk listTW3 4DE: not on the flood risk listTW3 4DF: not on the flood risk listTW3 4DG: not on the flood risk listTW3 4DH: not on the flood risk listTW3 4DJ: not on the flood risk listTW3 4DL: not on the flood risk listTW3 4DN: not on the flood risk listTW3 4DP: not on the flood risk listTW3 4DR: not on the flood risk listTW3 4DS: not on the flood risk listTW3 4DT: not on the flood risk listTW3 4DU: not on the flood risk listTW3 4DX: not on the flood risk listTW3 4DY: not on the flood risk listTW3 4DZ: not on the flood risk listTW3 4EA: not on the flood risk listTW3 4EB: not on the flood risk listTW3 4EJ: not on the flood risk listTW3 4EN: not on the flood risk listTW3 4EP: not on the flood risk listTW3 4ER: not on the flood risk listTW3 4ES: not on the flood risk listTW3 4ET: not on the flood risk listTW3 4EU: not on the flood risk listTW3 4EW: not on the flood risk listTW3 4EX: not on the flood risk listTW3 4EY: not on the flood risk listTW3 4EZ: not on the flood risk listTW3 4FA: not on the flood risk listTW3 4FB: not on the flood risk listTW3 4FD: not on the flood risk listTW3 4FE: not on the flood risk listTW3 4FF: not on the flood risk listTW3 4FG: not on the flood risk listTW3 4FH: not on the flood risk listTW3 4FJ: not on the flood risk listTW3 4FL: not on the flood risk listTW3 4FN: not on the flood risk listTW3 4FP: not on the flood risk listTW3 4FS: not on the flood risk listTW3 4FT: not on the flood risk listTW3 4FU: not on the flood risk listTW3 4FX: not on the flood risk listTW3 4FZ: not on the flood risk listTW3 4GB: not on the flood risk listTW3 4GD: not on the flood risk listTW3 4GE: not on the flood risk listTW3 4GF: not on the flood risk listTW3 4GH: not on the flood risk listTW3 4GJ: not on the flood risk listTW3 4GP: not on the flood risk listTW3 4HA: not on the flood risk listTW3 4HB: not on the flood risk listTW3 4HE: not on the flood risk listTW3 4HN: not on the flood risk listTW3 4HP: not on the flood risk listTW3 4HR: not on the flood risk listTW3 4HS: not on the flood risk listTW3 4HT: not on the flood risk listTW3 4HU: not on the flood risk listTW3 4HW: not on the flood risk listTW3 4HX: not on the flood risk listTW3 4HY: not on the flood risk listTW3 4JD: not on the flood risk listTW3 4JE: not on the flood risk listTW3 4JF: not on the flood risk listTW3 4JG: not on the flood risk listTW3 4JJ: not on the flood risk listTW3 4JL: not on the flood risk listTW3 4JN: not on the flood risk listTW3 4JP: not on the flood risk listTW3 4JR: not on the flood risk listTW3 4JS: not on the flood risk listTW3 4JW: not on the flood risk listTW3 4JX: not on the flood risk listTW3 4JZ: not on the flood risk listTW3 4LA: not on the flood risk listTW3 4LB: not on the flood risk listTW3 4LD: not on the flood risk listTW3 4LE: not on the flood risk listTW3 4LF: not on the flood risk listTW3 4LG: not on the flood risk listTW3 4LH: not on the flood risk listTW3 4LJ: not on the flood risk listTW3 4LL: not on the flood risk listTW3 4LN: not on the flood risk listTW3 4LP: not on the flood risk listTW3 4LQ: not on the flood risk listTW3 4LR: not on the flood risk listTW3 4LS: not on the flood risk listTW3 4LT: not on the flood risk listTW3 4LU: not on the flood risk listTW3 4LW: not on the flood risk listTW3 4LX: not on the flood risk listTW3 4LY: not on the flood risk listTW3 4LZ: not on the flood risk listTW3 4NA: not on the flood risk listTW3 4NB: not on the flood risk listTW3 4NE: not on the flood risk listTW3 4NF: not on the flood risk listTW3 4NG: not on the flood risk listTW3 4NH: not on the flood risk listTW3 4NJ: not on the flood risk listTW3 4NL: not on the flood risk listTW3 4NN: not on the flood risk listTW3 4NW: not on the flood risk listTW3 9SA: not on the flood risk listTW3 9SB: not on the flood risk list Hounslow Map of every postcode in TW3, by flood risk Of the 787 postcodes in TW3 that ONS places, 787 are not on the Environment Agency's at-risk list. Places named: Hounslow. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Hounslow
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 787

Of the 787 postcodes in TW3 that ONS places, 787 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. 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 51.4683, longitude -0.3640. 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

What broadband can you get in TW3?

Ofcom reports on 668 of the 787 postcodes in TW3. At 516 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit516 of 668
Postcodes where every home can get superfast631 of 668

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 TW3 at risk of flooding?

None of the 787 postcodes in TW3 is on the Environment Agency's list of postcodes with a home or business in an area at risk of flooding from rivers or the sea.

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 TW3?

Homes in TW3 sold for a typical £435,000 in the 12 months to August 2026, across 186 sales, up 2.4% on the 12 months before, HM Land Registry's figures show.

£435,000 typical price, the 12 months to August 2026
£425,000 12 months to August 2025
▲ up 2.4% on the 12 months before
  • Detached £558,580 8 sales
  • Semi-detached £570,000 51 sales
  • Terraced £500,000 53 sales
  • Flat or maisonette £286,500 74 sales

Each bar is that kind's typical price, against the most expensive kind here.

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 TW3

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

TW3 1210 postcodesTW3 2158 postcodesTW3 3196 postcodesTW3 4152 postcodesTW3 971 postcodes
UK postcode format explained

Places in TW3

Towns and villages with postcodes in TW3, and how many each has here.

Hounslow postcodes,765Richmond upon Thames postcodes,22

Who covers TW3

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

  • Brentford and Isleworth655
  • Feltham and Heston127
  • Twickenham5

Police force areas

  • Metropolitan Police787

Next to TW3

TW2 postcode district TW4 postcode district All TW districts Hounslow postcodes

"Next to" is by number: the districts before and after TW3 in the TW area.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.