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, by gigabit broadband

Map of every postcode in the TW18 3 sector, by gigabit broadband Of the 121 postcodes in the TW18 3 sector that ONS places, 11 have no home or business that can get gigabit, 23 have some that can, 77 can all get it and 10 have no Ofcom figure. One group of postcodes without gigabit is outlined: 5 postcodes without gigabit. Places named: Staines-upon-Thames. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A320 TW18 3AR: no Ofcom figureTW18 3BW: no Ofcom figureTW18 3BX: no Ofcom figureTW18 3DU: no Ofcom figureTW18 3FF: no Ofcom figureTW18 3FG: no Ofcom figureTW18 3FH: no Ofcom figureTW18 3AD: gigabit for allTW18 3AE: gigabit for allTW18 3AF: gigabit for allTW18 3AP: gigabit for allTW18 3AS: gigabit for allTW18 3AT: gigabit for allTW18 3AU: gigabit for allTW18 3DA: gigabit for allTW18 3DB: gigabit for allTW18 3DD: gigabit for allTW18 3DE: gigabit for allTW18 3DG: gigabit for allTW18 3DJ: gigabit for allTW18 3DP: gigabit for allTW18 3DQ: gigabit for allTW18 3DW: gigabit for allTW18 3EB: gigabit for allTW18 3ED: gigabit for allTW18 3EE: gigabit for allTW18 3EF: gigabit for allTW18 3EG: gigabit for allTW18 3EH: gigabit for allTW18 3EJ: gigabit for allTW18 3EP: gigabit for allTW18 3EQ: gigabit for allTW18 3ES: gigabit for allTW18 3EU: gigabit for allTW18 3EX: gigabit for allTW18 3EY: gigabit for allTW18 3FA: gigabit for allTW18 3FB: gigabit for allTW18 3FE: gigabit for allTW18 3HB: gigabit for allTW18 3HD: gigabit for allTW18 3HE: gigabit for allTW18 3HG: gigabit for allTW18 3HH: gigabit for allTW18 3HJ: gigabit for allTW18 3HN: gigabit for allTW18 3HQ: gigabit for allTW18 3HS: gigabit for allTW18 3HT: gigabit for allTW18 3HX: gigabit for allTW18 3JA: gigabit for allTW18 3JB: gigabit for allTW18 3JD: gigabit for allTW18 3JF: gigabit for allTW18 3JH: gigabit for allTW18 3JJ: gigabit for allTW18 3JL: gigabit for allTW18 3JN: gigabit for allTW18 3JQ: gigabit for allTW18 3JS: gigabit for allTW18 3JT: gigabit for allTW18 3JU: gigabit for allTW18 3LA: gigabit for allTW18 3LD: gigabit for allTW18 3LF: gigabit for allTW18 3LG: gigabit for allTW18 3LH: gigabit for allTW18 3LJ: gigabit for allTW18 3LP: gigabit for allTW18 3LQ: gigabit for allTW18 3LR: gigabit for allTW18 3LS: gigabit for allTW18 3LT: gigabit for allTW18 3LY: gigabit for allTW18 3NB: gigabit for allTW18 3ND: gigabit for allTW18 3NF: gigabit for allTW18 3NG: gigabit for allTW18 3NH: gigabit for allTW18 3NJ: gigabit for allTW18 3NL: gigabit for allTW18 3NP: gigabit for allTW18 3NW: gigabit for allTW18 3NZ: gigabit for allTW18 3AQ: some gigabitTW18 3AW: some gigabitTW18 3AX: some gigabitTW18 3DF: some gigabitTW18 3DH: some gigabitTW18 3HR: some gigabitTW18 3ER: some gigabitTW18 3ET: some gigabitTW18 3EZ: some gigabitTW18 3HF: some gigabitTW18 3HU: some gigabitTW18 3HW: some gigabitTW18 3JE: some gigabitTW18 3JX: some gigabitTW18 3JY: some gigabitTW18 3LB: some gigabitTW18 3LL: some gigabitTW18 3LN: some gigabitTW18 3LU: some gigabitTW18 3LW: some gigabitTW18 3LX: some gigabitTW18 3LZ: some gigabitTW18 3NQ: some gigabitTW18 3AG: no gigabitTW18 3AL: no gigabitTW18 3AY: no gigabitTW18 3AZ: no gigabitTW18 3BA: no gigabitTW18 3BF: no gigabitTW18 3BG: no gigabitTW18 3BU: no gigabitTW18 3EW: no gigabitTW18 3FD: no gigabitTW18 3HP: no gigabit Staines-upon-Thames 5 postcodes without gigabit, outlined: this goes to TW18 3BF, the one nearest the middle of them5 postcodes without gigabit Map of every postcode in the TW18 3 sector, by gigabit broadband Of the 121 postcodes in the TW18 3 sector that ONS places, 11 have no home or business that can get gigabit, 23 have some that can, 77 can all get it and 10 have no Ofcom figure. One group of postcodes without gigabit is outlined: 5 postcodes without gigabit. 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 5 postcodes without gigabit, outlined: this goes to TW18 3BF, the one nearest the middle of them5 postcodes without gigabit
  • No home or business can get gigabit: 11
  • Some can get gigabit: 23
  • Every home and business can get gigabit: 77
  • Ofcom gives no figure: 10
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 121 postcodes in the TW18 3 sector that ONS places, 11 have no home or business that can get gigabit, 23 have some that can, 77 can all get it and 10 have no Ofcom figure.

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.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

Postcodes without gigabit

TW18 3AGTW18 3ALTW18 3AYTW18 3AZTW18 3BATW18 3BFTW18 3BGTW18 3BUTW18 3EWTW18 3FDTW18 3HP

Where the postcodes without gigabit lie together

  • 5 postcodes without gigabit, outlined on the map. TW18 3BF, is the one nearest the middle of them.

What do homes sell for in TW18 3?

Homes in TW18 3 sold for a typical £415,000 in the 12 months to September 2026, across 46 sales, HM Land Registry's figures show. The 12 months before gave £425,000 from 77 sales: not a change larger than chance would explain, given which homes happened to sell.

£415,000 typical price, the 12 months to September 2026
£425,000 12 months to September 2025
  • Detached £736,500 6 sales
  • Semi-detached £475,000 16 sales
  • Terraced £395,000 13 sales
  • Flat or maisonette £275,000 11 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 October 2026.

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: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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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Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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