TW3 1 postcode sector in the TW3 district

TW3 1 is a sector of the TW3 district: every postcode that starts TW3 1. It has 210 postcodes in use, 9 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the TW3 1 sector, by flood risk

Map of every postcode in the TW3 1 sector, by flood risk Of the 210 postcodes in the TW3 1 sector that ONS places, 210 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 250 m. 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 1AP: 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 1EW: not on the flood risk listTW3 1EX: not on the flood risk listTW3 1EY: not on the flood risk listTW3 1EZ: not on the flood risk listTW3 1FA: not on the flood risk listTW3 1FZ: 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 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 1ZA: not on the flood risk list Hounslow Map of every postcode in the TW3 1 sector, by flood risk Of the 210 postcodes in the TW3 1 sector that ONS places, 210 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 250 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: 210

Of the 210 postcodes in the TW3 1 sector that ONS places, 210 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.

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 do homes sell for in TW3 1?

Homes in TW3 1 sold for a typical £306,000 in the 12 months to August 2026, across 56 sales, down 10% on the 12 months before, HM Land Registry's figures show.

£306,000 typical price, the 12 months to August 2026
£340,000 12 months to August 2025
▼ down 10% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached 2 sales, too few to price
  • Terraced £437,500 12 sales
  • Flat or maisonette £275,000 41 sales

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

Standard sales of homes at market value at the postcodes that start TW3 1. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

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 1

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

TW3 1AATW3 1AETW3 1AGTW3 1AHTW3 1AJTW3 1ALTW3 1ANTW3 1APTW3 1AQTW3 1ARTW3 1ASTW3 1ATTW3 1AUTW3 1AWTW3 1AXTW3 1AYTW3 1AZTW3 1BATW3 1BFTW3 1BGTW3 1BHTW3 1BLTW3 1BNTW3 1BQTW3 1BTTW3 1BXTW3 1BYTW3 1DATW3 1DHTW3 1DJTW3 1DLTW3 1DQTW3 1DTTW3 1DUTW3 1DYTW3 1DZTW3 1EATW3 1EBTW3 1EDTW3 1EETW3 1EFTW3 1EHTW3 1ELTW3 1ERTW3 1ESTW3 1ETTW3 1EUTW3 1EWTW3 1EXTW3 1EYTW3 1EZTW3 1FATW3 1FHTW3 1FUTW3 1FZTW3 1GATW3 1GBTW3 1GDTW3 1GETW3 1GFTW3 1GHTW3 1GJTW3 1GLTW3 1GNTW3 1HATW3 1HBTW3 1HETW3 1HGTW3 1HHTW3 1HLTW3 1HYTW3 1JATW3 1JGTW3 1JHTW3 1JLTW3 1JQTW3 1JSTW3 1JXTW3 1JYTW3 1JZTW3 1LATW3 1LBTW3 1LDTW3 1LGTW3 1LHTW3 1LJTW3 1LQTW3 1LRTW3 1LSTW3 1LXTW3 1LYTW3 1NATW3 1NBTW3 1NDTW3 1NFTW3 1NHTW3 1NJTW3 1NLTW3 1NNTW3 1NPTW3 1NQTW3 1NSTW3 1NTTW3 1NUTW3 1NWTW3 1NXTW3 1PATW3 1PBTW3 1PETW3 1PGTW3 1PHTW3 1PJTW3 1PLTW3 1PNTW3 1PPTW3 1PQTW3 1PSTW3 1PTTW3 1PUTW3 1PWTW3 1PXTW3 1QATW3 1QBTW3 1QDTW3 1QETW3 1QGTW3 1QHTW3 1QJTW3 1QLTW3 1QPTW3 1QQTW3 1QRTW3 1QSTW3 1QTTW3 1QUTW3 1QXTW3 1QZTW3 1RBTW3 1RFTW3 1RHTW3 1RSTW3 1RZTW3 1SBTW3 1SDTW3 1SETW3 1SFTW3 1SGTW3 1SJTW3 1SLTW3 1SNTW3 1SPTW3 1SQTW3 1SRTW3 1SSTW3 1SUTW3 1SWTW3 1SXTW3 1SYTW3 1SZTW3 1TATW3 1TTTW3 1UATW3 1UETW3 1UFTW3 1UGTW3 1ULTW3 1UNTW3 1UPTW3 1UQTW3 1UWTW3 1UXTW3 1UYTW3 1UZTW3 1XATW3 1XBTW3 1XDTW3 1XETW3 1XFTW3 1XGTW3 1XHTW3 1XJTW3 1XLTW3 1XNTW3 1XPTW3 1XQTW3 1XSTW3 1XTTW3 1XUTW3 1XWTW3 1XXTW3 1XYTW3 1XZTW3 1YATW3 1YETW3 1YFTW3 1YGTW3 1YHTW3 1YJTW3 1YLTW3 1YNTW3 1YQTW3 1YRTW3 1YSTW3 1YTTW3 1YUTW3 1YWTW3 1YXTW3 1YYTW3 1ZATW3 1ZS

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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