TW18 3 postcode sector in the TW18 district

TW18 3 is a sector of the TW18 district: every postcode that starts TW18 3. It has 121 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 TW18 3 sector, and which are new since 2020

Map of every postcode in the TW18 3 sector, by new since 2020 Of the 121 postcodes in the TW18 3 sector that ONS places, 6 are new since 2020 and 115 were in use before 2020. Places named: Staines-upon-Thames. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A320 TW18 3AD: before 2020TW18 3AE: before 2020TW18 3AF: before 2020TW18 3AG: before 2020TW18 3AL: before 2020TW18 3AP: before 2020TW18 3AQ: before 2020TW18 3AR: before 2020TW18 3AS: before 2020TW18 3AT: before 2020TW18 3AU: before 2020TW18 3AW: before 2020TW18 3AX: before 2020TW18 3AY: before 2020TW18 3AZ: before 2020TW18 3BA: before 2020TW18 3BF: before 2020TW18 3BG: before 2020TW18 3BU: before 2020TW18 3BW: before 2020TW18 3BX: before 2020TW18 3DA: before 2020TW18 3DB: before 2020TW18 3DD: before 2020TW18 3DE: before 2020TW18 3DF: before 2020TW18 3DG: before 2020TW18 3DH: before 2020TW18 3DJ: before 2020TW18 3DP: before 2020TW18 3DQ: before 2020TW18 3DU: before 2020TW18 3DW: before 2020TW18 3EB: before 2020TW18 3ED: before 2020TW18 3EE: before 2020TW18 3EF: before 2020TW18 3EG: before 2020TW18 3EH: before 2020TW18 3EJ: before 2020TW18 3EP: before 2020TW18 3EQ: before 2020TW18 3ER: before 2020TW18 3ES: before 2020TW18 3ET: before 2020TW18 3EU: before 2020TW18 3EW: before 2020TW18 3EX: before 2020TW18 3EY: before 2020TW18 3EZ: before 2020TW18 3FA: before 2020TW18 3HB: before 2020TW18 3HD: before 2020TW18 3HE: before 2020TW18 3HF: before 2020TW18 3HG: before 2020TW18 3HH: before 2020TW18 3HJ: before 2020TW18 3HN: before 2020TW18 3HP: before 2020TW18 3HQ: before 2020TW18 3HS: before 2020TW18 3HT: before 2020TW18 3HU: before 2020TW18 3HW: before 2020TW18 3HX: before 2020TW18 3JA: before 2020TW18 3JB: before 2020TW18 3JD: before 2020TW18 3JE: before 2020TW18 3JF: before 2020TW18 3JH: before 2020TW18 3JJ: before 2020TW18 3JL: before 2020TW18 3JN: before 2020TW18 3JQ: before 2020TW18 3JS: before 2020TW18 3JT: before 2020TW18 3JU: before 2020TW18 3JX: before 2020TW18 3JY: before 2020TW18 3LA: before 2020TW18 3LB: before 2020TW18 3LD: before 2020TW18 3LF: before 2020TW18 3LG: before 2020TW18 3LH: before 2020TW18 3LJ: before 2020TW18 3LL: before 2020TW18 3LN: before 2020TW18 3LP: before 2020TW18 3LQ: before 2020TW18 3LR: before 2020TW18 3LS: before 2020TW18 3LT: before 2020TW18 3LU: before 2020TW18 3LW: before 2020TW18 3LX: before 2020TW18 3LY: before 2020TW18 3LZ: before 2020TW18 3NB: before 2020TW18 3ND: before 2020TW18 3NF: before 2020TW18 3NG: before 2020TW18 3NH: before 2020TW18 3NJ: before 2020TW18 3NL: before 2020TW18 3NP: before 2020TW18 3NQ: before 2020TW18 3NW: before 2020TW18 3NZ: before 2020TW18 3DZ: before 2020TW18 3FB: new since 2020TW18 3FD: new since 2020TW18 3FE: new since 2020TW18 3FF: new since 2020TW18 3FG: new since 2020TW18 3FH: new since 2020 Staines-upon-Thames Map of every postcode in the TW18 3 sector, by new since 2020 Of the 121 postcodes in the TW18 3 sector that ONS places, 6 are new since 2020 and 115 were in use before 2020. Places named: Staines-upon-Thames. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. Staines-upon-Thames
  • New since 2020: 6
  • In use before 2020: 115

Of the 121 postcodes in the TW18 3 sector that ONS places, 6 are new since 2020 and 115 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.

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

TW18 3FFOctober 2025TW18 3FGOctober 2025TW18 3FHOctober 2025TW18 3FEJuly 2025TW18 3FDApril 2020

What do homes sell for in TW18 3?

Homes in TW18 3 sold for a typical £425,000 in the 12 months to August 2026, across 52 sales, up 2.7% on the 12 months before, HM Land Registry's figures show.

£425,000 typical price, the 12 months to August 2026
£413,750 12 months to August 2025
▲ up 2.7% on the 12 months before
  • Detached £658,000 9 sales
  • Semi-detached £480,000 19 sales
  • Terraced £395,000 15 sales
  • Flat or maisonette £230,000 9 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 TW18 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 TW18 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.

TW18 3ADTW18 3AETW18 3AFTW18 3AGTW18 3ALTW18 3APTW18 3AQTW18 3ARTW18 3ASTW18 3ATTW18 3AUTW18 3AWTW18 3AXTW18 3AYTW18 3AZTW18 3BATW18 3BFTW18 3BGTW18 3BUTW18 3BWTW18 3BXTW18 3DATW18 3DBTW18 3DDTW18 3DETW18 3DFTW18 3DGTW18 3DHTW18 3DJTW18 3DPTW18 3DQTW18 3DUTW18 3DWTW18 3DZTW18 3EBTW18 3EDTW18 3EETW18 3EFTW18 3EGTW18 3EHTW18 3EJTW18 3EPTW18 3EQTW18 3ERTW18 3ESTW18 3ETTW18 3EUTW18 3EWTW18 3EXTW18 3EYTW18 3EZTW18 3FATW18 3FBTW18 3FDTW18 3FETW18 3FFTW18 3FGTW18 3FHTW18 3HBTW18 3HDTW18 3HETW18 3HFTW18 3HGTW18 3HHTW18 3HJTW18 3HNTW18 3HPTW18 3HQTW18 3HRTW18 3HSTW18 3HTTW18 3HUTW18 3HWTW18 3HXTW18 3JATW18 3JBTW18 3JDTW18 3JETW18 3JFTW18 3JHTW18 3JJTW18 3JLTW18 3JNTW18 3JQTW18 3JSTW18 3JTTW18 3JUTW18 3JXTW18 3JYTW18 3LATW18 3LBTW18 3LDTW18 3LFTW18 3LGTW18 3LHTW18 3LJTW18 3LLTW18 3LNTW18 3LPTW18 3LQTW18 3LRTW18 3LSTW18 3LTTW18 3LUTW18 3LWTW18 3LXTW18 3LYTW18 3LZTW18 3NBTW18 3NDTW18 3NFTW18 3NGTW18 3NHTW18 3NJTW18 3NLTW18 3NPTW18 3NQTW18 3NWTW18 3NZTW18 3QXTW18 3WJ

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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