TW3 3 postcode sector in the TW3 district

TW3 3 is a sector of the TW3 district: every postcode that starts TW3 3. It has 196 postcodes in use, 2 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 3 sector, and which are new since 2020

Map of every postcode in the TW3 3 sector, by new since 2020 Of the 196 postcodes in the TW3 3 sector that ONS places, 5 are new since 2020 and 191 were in use before 2020. Places named: Hounslow Heath, Hounslow West. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A4 TW3 3AA: before 2020TW3 3AB: before 2020TW3 3AD: before 2020TW3 3AE: before 2020TW3 3AF: before 2020TW3 3AG: before 2020TW3 3AH: before 2020TW3 3AJ: before 2020TW3 3AL: before 2020TW3 3AN: before 2020TW3 3AP: before 2020TW3 3AQ: before 2020TW3 3AR: before 2020TW3 3AS: before 2020TW3 3AT: before 2020TW3 3AW: before 2020TW3 3BB: before 2020TW3 3BD: before 2020TW3 3BJ: before 2020TW3 3BN: before 2020TW3 3BP: before 2020TW3 3BS: before 2020TW3 3BT: before 2020TW3 3BU: before 2020TW3 3BW: before 2020TW3 3DA: before 2020TW3 3DB: before 2020TW3 3DD: before 2020TW3 3DE: before 2020TW3 3DF: before 2020TW3 3DG: before 2020TW3 3DH: before 2020TW3 3DL: before 2020TW3 3DQ: before 2020TW3 3DU: before 2020TW3 3DW: before 2020TW3 3EB: before 2020TW3 3ED: before 2020TW3 3EH: before 2020TW3 3EJ: before 2020TW3 3EL: before 2020TW3 3EN: before 2020TW3 3EP: before 2020TW3 3EQ: before 2020TW3 3ER: before 2020TW3 3ES: before 2020TW3 3ET: before 2020TW3 3EW: before 2020TW3 3EX: before 2020TW3 3EY: before 2020TW3 3FF: before 2020TW3 3FG: before 2020TW3 3FH: before 2020TW3 3FJ: before 2020TW3 3FL: before 2020TW3 3FN: before 2020TW3 3FP: before 2020TW3 3FQ: before 2020TW3 3FR: before 2020TW3 3FS: before 2020TW3 3FT: before 2020TW3 3FW: before 2020TW3 3FX: before 2020TW3 3FY: before 2020TW3 3FZ: before 2020TW3 3GH: before 2020TW3 3HH: before 2020TW3 3HP: before 2020TW3 3HW: before 2020TW3 3HY: before 2020TW3 3JB: before 2020TW3 3JJ: before 2020TW3 3JR: before 2020TW3 3JS: before 2020TW3 3JT: before 2020TW3 3JW: before 2020TW3 3JY: before 2020TW3 3JZ: before 2020TW3 3LF: before 2020TW3 3LH: before 2020TW3 3LJ: before 2020TW3 3LL: before 2020TW3 3LQ: before 2020TW3 3LR: before 2020TW3 3LS: before 2020TW3 3LU: before 2020TW3 3LX: before 2020TW3 3LZ: before 2020TW3 3NE: before 2020TW3 3NN: before 2020TW3 3NR: before 2020TW3 3NT: before 2020TW3 3NU: before 2020TW3 3NX: before 2020TW3 3PB: before 2020TW3 3PE: before 2020TW3 3PR: before 2020TW3 3PT: before 2020TW3 3PU: before 2020TW3 3PW: before 2020TW3 3PX: before 2020TW3 3PY: before 2020TW3 3PZ: before 2020TW3 3QB: before 2020TW3 3QD: before 2020TW3 3QE: before 2020TW3 3QF: before 2020TW3 3QG: before 2020TW3 3QH: before 2020TW3 3QJ: before 2020TW3 3QL: before 2020TW3 3QN: before 2020TW3 3QP: before 2020TW3 3QQ: before 2020TW3 3QR: before 2020TW3 3QS: before 2020TW3 3QT: before 2020TW3 3QU: before 2020TW3 3QW: before 2020TW3 3QX: before 2020TW3 3QY: before 2020TW3 3QZ: before 2020TW3 3RA: before 2020TW3 3RB: before 2020TW3 3RD: before 2020TW3 3RF: before 2020TW3 3RG: before 2020TW3 3RH: before 2020TW3 3RJ: before 2020TW3 3RL: before 2020TW3 3RN: before 2020TW3 3RP: before 2020TW3 3RQ: before 2020TW3 3RR: before 2020TW3 3RS: before 2020TW3 3RT: before 2020TW3 3RU: before 2020TW3 3RW: before 2020TW3 3RX: before 2020TW3 3RY: before 2020TW3 3RZ: before 2020TW3 3SA: before 2020TW3 3SB: before 2020TW3 3SD: before 2020TW3 3SE: before 2020TW3 3SF: before 2020TW3 3SG: before 2020TW3 3SH: before 2020TW3 3SJ: before 2020TW3 3SL: before 2020TW3 3SN: before 2020TW3 3SQ: before 2020TW3 3ST: before 2020TW3 3SU: before 2020TW3 3SW: before 2020TW3 3SX: before 2020TW3 3SY: before 2020TW3 3TD: before 2020TW3 3TE: before 2020TW3 3TF: before 2020TW3 3TG: before 2020TW3 3TJ: before 2020TW3 3TL: before 2020TW3 3TN: before 2020TW3 3TQ: before 2020TW3 3TR: before 2020TW3 3TS: before 2020TW3 3TT: before 2020TW3 3TU: before 2020TW3 3TX: before 2020TW3 3TY: before 2020TW3 3UA: before 2020TW3 3UD: before 2020TW3 3UE: before 2020TW3 3UH: before 2020TW3 3UJ: before 2020TW3 3UL: before 2020TW3 3UN: before 2020TW3 3UP: before 2020TW3 3UQ: before 2020TW3 3UW: before 2020TW3 3UZ: before 2020TW3 3FU: new since 2020TW3 3GL: new since 2020TW3 3GN: new since 2020TW3 3GP: new since 2020TW3 3GQ: new since 2020 Hounslow HeathHounslow West Map of every postcode in the TW3 3 sector, by new since 2020 Of the 196 postcodes in the TW3 3 sector that ONS places, 5 are new since 2020 and 191 were in use before 2020. Places named: Hounslow Heath, Hounslow West. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Hounslow HeathHounslow West
  • New since 2020: 5
  • In use before 2020: 191

Of the 196 postcodes in the TW3 3 sector that ONS places, 5 are new since 2020 and 191 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode. Names in italics are council wards: we hold no town or village names here.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; when each came into use: the same directory; 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 5 newest postcodes

TW3 3GNMay 2024TW3 3GLApril 2024TW3 3GQNovember 2022TW3 3GPDecember 2021TW3 3FUJanuary 2020

What do homes sell for in TW3 3?

Homes in TW3 3 sold for a typical £371,500 in the 12 months to August 2026, across 40 sales, up 17.9% on the 12 months before, HM Land Registry's figures show.

£371,500 typical price, the 12 months to August 2026
£315,000 12 months to August 2025
▲ up 17.9% on the 12 months before
  • Semi-detached £544,000 16 sales
  • Terraced £485,500 6 sales
  • Flat or maisonette £246,500 18 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 3. 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 3

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 3AATW3 3ABTW3 3ADTW3 3AETW3 3AFTW3 3AGTW3 3AHTW3 3AJTW3 3ALTW3 3ANTW3 3APTW3 3AQTW3 3ARTW3 3ASTW3 3ATTW3 3AWTW3 3BBTW3 3BDTW3 3BJTW3 3BNTW3 3BPTW3 3BSTW3 3BTTW3 3BUTW3 3BWTW3 3DATW3 3DBTW3 3DDTW3 3DETW3 3DFTW3 3DGTW3 3DHTW3 3DLTW3 3DQTW3 3DUTW3 3DWTW3 3EBTW3 3EDTW3 3EHTW3 3EJTW3 3ELTW3 3ENTW3 3EPTW3 3EQTW3 3ERTW3 3ESTW3 3ETTW3 3EWTW3 3EXTW3 3EYTW3 3FFTW3 3FGTW3 3FHTW3 3FJTW3 3FLTW3 3FNTW3 3FPTW3 3FQTW3 3FRTW3 3FSTW3 3FTTW3 3FUTW3 3FWTW3 3FXTW3 3FYTW3 3FZTW3 3GBTW3 3GDTW3 3GETW3 3GFTW3 3GGTW3 3GHTW3 3GLTW3 3GNTW3 3GPTW3 3GQTW3 3HHTW3 3HJTW3 3HPTW3 3HWTW3 3HYTW3 3JBTW3 3JJTW3 3JRTW3 3JSTW3 3JTTW3 3JWTW3 3JYTW3 3JZTW3 3LFTW3 3LHTW3 3LJTW3 3LLTW3 3LNTW3 3LQTW3 3LRTW3 3LSTW3 3LUTW3 3LXTW3 3LZTW3 3NETW3 3NNTW3 3NRTW3 3NTTW3 3NUTW3 3NXTW3 3PBTW3 3PETW3 3PJTW3 3PRTW3 3PTTW3 3PUTW3 3PWTW3 3PXTW3 3PYTW3 3PZTW3 3QBTW3 3QDTW3 3QETW3 3QFTW3 3QGTW3 3QHTW3 3QJTW3 3QLTW3 3QNTW3 3QPTW3 3QQTW3 3QRTW3 3QSTW3 3QTTW3 3QUTW3 3QWTW3 3QXTW3 3QYTW3 3QZTW3 3RATW3 3RBTW3 3RDTW3 3RETW3 3RFTW3 3RGTW3 3RHTW3 3RJTW3 3RLTW3 3RNTW3 3RPTW3 3RQTW3 3RRTW3 3RSTW3 3RTTW3 3RUTW3 3RWTW3 3RXTW3 3RYTW3 3RZTW3 3SATW3 3SBTW3 3SDTW3 3SETW3 3SFTW3 3SGTW3 3SHTW3 3SJTW3 3SLTW3 3SNTW3 3SQTW3 3STTW3 3SUTW3 3SWTW3 3SXTW3 3SYTW3 3TDTW3 3TETW3 3TFTW3 3TGTW3 3TJTW3 3TLTW3 3TNTW3 3TQTW3 3TRTW3 3TSTW3 3TTTW3 3TUTW3 3TXTW3 3TYTW3 3UATW3 3UDTW3 3UETW3 3UHTW3 3UJTW3 3ULTW3 3UNTW3 3UPTW3 3UQTW3 3UWTW3 3UZ

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.

Check a postcode

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