TW18 4 postcode sector in the TW18 district

TW18 4 is a sector of the TW18 district: every postcode that starts TW18 4. It has 202 postcodes in use, 12 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 4 sector, by flood risk

Map of every postcode in the TW18 4 sector, by flood risk Of the 202 postcodes in the TW18 4 sector that ONS places, 22 have a home or business at high risk, 22 are at medium risk at worst, 89 are at low risk at worst, 24 are at very low risk only and 45 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 27 postcodes at high or medium risk. Places named: Staines. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A30 TW18 4AF: not on the flood risk listTW18 4AJ: not on the flood risk listTW18 4AP: not on the flood risk listTW18 4AR: not on the flood risk listTW18 4AY: not on the flood risk listTW18 4BF: not on the flood risk listTW18 4BG: not on the flood risk listTW18 4BJ: not on the flood risk listTW18 4DL: not on the flood risk listTW18 4DQ: not on the flood risk listTW18 4DY: not on the flood risk listTW18 4EB: not on the flood risk listTW18 4EE: not on the flood risk listTW18 4EX: not on the flood risk listTW18 4HL: not on the flood risk listTW18 4HP: not on the flood risk listTW18 4HW: not on the flood risk listTW18 4HX: not on the flood risk listTW18 4JB: not on the flood risk listTW18 4JJ: not on the flood risk listTW18 4JQ: not on the flood risk listTW18 4JR: not on the flood risk listTW18 4JU: not on the flood risk listTW18 4JY: not on the flood risk listTW18 4LD: not on the flood risk listTW18 4NX: not on the flood risk listTW18 4PP: not on the flood risk listTW18 4QH: not on the flood risk listTW18 4QU: not on the flood risk listTW18 4QY: not on the flood risk listTW18 4SG: not on the flood risk listTW18 4WA: not on the flood risk listTW18 4XX: not on the flood risk listTW18 4XY: not on the flood risk listTW18 4YF: not on the flood risk listTW18 4YJ: not on the flood risk listTW18 4AX: very low flood risk onlyTW18 4BP: very low flood risk onlyTW18 4BW: very low flood risk onlyTW18 4DD: very low flood risk onlyTW18 4DN: very low flood risk onlyTW18 4EZ: very low flood risk onlyTW18 4HB: very low flood risk onlyTW18 4HD: very low flood risk onlyTW18 4HF: very low flood risk onlyTW18 4HY: very low flood risk onlyTW18 4JG: very low flood risk onlyTW18 4JL: very low flood risk onlyTW18 4JN: very low flood risk onlyTW18 4JX: very low flood risk onlyTW18 4LY: very low flood risk onlyTW18 4LZ: very low flood risk onlyTW18 4ND: very low flood risk onlyTW18 4NG: very low flood risk onlyTW18 4NT: very low flood risk onlyTW18 4NZ: very low flood risk onlyTW18 4QN: very low flood risk onlyTW18 4RN: very low flood risk onlyTW18 4RW: very low flood risk onlyTW18 4AB: low flood risk at worstTW18 4AG: low flood risk at worstTW18 4AH: low flood risk at worstTW18 4AS: low flood risk at worstTW18 4BB: low flood risk at worstTW18 4BD: low flood risk at worstTW18 4BL: low flood risk at worstTW18 4BN: low flood risk at worstTW18 4BY: low flood risk at worstTW18 4DE: low flood risk at worstTW18 4DF: low flood risk at worstTW18 4NL: low flood risk at worstTW18 4EQ: low flood risk at worstTW18 4EW: low flood risk at worstTW18 4EY: low flood risk at worstTW18 4HA: low flood risk at worstTW18 4HN: low flood risk at worstTW18 4HR: low flood risk at worstTW18 4HS: low flood risk at worstTW18 4HT: low flood risk at worstTW18 4HU: low flood risk at worstTW18 4HZ: low flood risk at worstTW18 4JH: low flood risk at worstTW18 4JT: low flood risk at worstTW18 4JW: low flood risk at worstTW18 4JZ: low flood risk at worstTW18 4LA: low flood risk at worstTW18 4LB: low flood risk at worstTW18 4LG: low flood risk at worstTW18 4LH: low flood risk at worstTW18 4LP: low flood risk at worstTW18 4LQ: low flood risk at worstTW18 4LR: low flood risk at worstTW18 4LS: low flood risk at worstTW18 4LT: low flood risk at worstTW18 4LU: low flood risk at worstTW18 4LW: low flood risk at worstTW18 4LX: low flood risk at worstTW18 4NB: low flood risk at worstTW18 4NE: low flood risk at worstTW18 4NF: low flood risk at worstTW18 4NH: low flood risk at worstTW18 4NJ: low flood risk at worstTW18 4NP: low flood risk at worstTW18 4NQ: low flood risk at worstTW18 4NR: low flood risk at worstTW18 4NS: low flood risk at worstTW18 4NU: low flood risk at worstTW18 4NW: low flood risk at worstTW18 4PA: low flood risk at worstTW18 4PB: low flood risk at worstTW18 4PD: low flood risk at worstTW18 4QD: low flood risk at worstTW18 4QJ: low flood risk at worstTW18 4QL: low flood risk at worstTW18 4QP: low flood risk at worstTW18 4QX: low flood risk at worstTW18 4QZ: low flood risk at worstTW18 4RH: low flood risk at worstTW18 4RJ: low flood risk at worstTW18 4RL: low flood risk at worstTW18 4RR: low flood risk at worstTW18 4RS: low flood risk at worstTW18 4RT: low flood risk at worstTW18 4RU: low flood risk at worstTW18 4RX: low flood risk at worstTW18 4RY: low flood risk at worstTW18 4SH: low flood risk at worstTW18 4SN: low flood risk at worstTW18 4SW: low flood risk at worstTW18 4TD: low flood risk at worstTW18 4TN: low flood risk at worstTW18 4UP: low flood risk at worstTW18 4US: low flood risk at worstTW18 4XH: low flood risk at worstTW18 4XP: low flood risk at worstTW18 4XR: low flood risk at worstTW18 4XT: low flood risk at worstTW18 4YG: low flood risk at worstTW18 4YH: low flood risk at worstTW18 4YU: low flood risk at worstTW18 4YW: low flood risk at worstTW18 4ZN: low flood risk at worstTW18 4ZT: low flood risk at worstTW18 4ZU: low flood risk at worstTW18 4ZX: low flood risk at worstTW18 4DP: medium flood risk at worstTW18 4EA: medium flood risk at worstTW18 4PG: medium flood risk at worstTW18 4PQ: medium flood risk at worstTW18 4PR: medium flood risk at worstTW18 4PT: medium flood risk at worstTW18 4QB: medium flood risk at worstTW18 4RB: medium flood risk at worstTW18 4RP: medium flood risk at worstTW18 4SJ: medium flood risk at worstTW18 4TB: medium flood risk at worstTW18 4TW: medium flood risk at worstTW18 4WB: medium flood risk at worstTW18 4XL: medium flood risk at worstTW18 4YA: medium flood risk at worstTW18 4YP: medium flood risk at worstTW18 4YR: medium flood risk at worstTW18 4YT: medium flood risk at worstTW18 4YX: medium flood risk at worstTW18 4YY: medium flood risk at worstTW18 4ZB: medium flood risk at worstTW18 4BU: high flood riskTW18 4EN: high flood riskTW18 4EP: high flood riskTW18 4RZ: high flood riskTW18 4SD: high flood riskTW18 4SP: high flood riskTW18 4SU: high flood riskTW18 4SY: high flood riskTW18 4TG: high flood riskTW18 4TS: high flood riskTW18 4TT: high flood riskTW18 4TU: high flood riskTW18 4TX: high flood riskTW18 4TY: high flood riskTW18 4TZ: high flood riskTW18 4UA: high flood riskTW18 4UW: high flood riskTW18 4XE: high flood riskTW18 4XZ: high flood riskTW18 4YD: high flood riskTW18 4YE: high flood riskTW18 4YZ: high flood risk Staines 27 postcodes at high or medium risk, outlined: this goes to TW18 4BU, the one with most homes and businesses at high risk27 postcodes at high or medium risk Map of every postcode in the TW18 4 sector, by flood risk Of the 202 postcodes in the TW18 4 sector that ONS places, 22 have a home or business at high risk, 22 are at medium risk at worst, 89 are at low risk at worst, 24 are at very low risk only and 45 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 27 postcodes at high or medium risk. Places named: Staines. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A3044A320 Staines
  • A home or business at high risk: 22
  • At medium risk at worst: 22
  • At low risk at worst: 89
  • At very low risk only: 24
  • Not on the at-risk list: 45
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 202 postcodes in the TW18 4 sector that ONS places, 22 have a home or business at high risk, 22 are at medium risk at worst, 89 are at low risk at worst, 24 are at very low risk only and 45 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. 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. 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; 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

The postcodes at high risk

22 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

TW18 4BU66 at high riskTW18 4TY59 at high riskTW18 4TZ43 at high riskTW18 4TS17 at high riskTW18 4EN15 at high riskTW18 4YE15 at high riskTW18 4RZ10 at high riskTW18 4TX9 at high riskTW18 4XZ7 at high riskTW18 4UA7 at high riskTW18 4EP6 at high riskTW18 4YD5 at high risk

Where the postcodes at high or medium risk lie together

  • 27 postcodes at high or medium risk, outlined on the map. TW18 4BU, is the one with most homes and businesses at high risk.

What do homes sell for in TW18 4?

Homes in TW18 4 sold for a typical £416,000 in the 12 months to August 2026, across 81 sales, up 7.7% on the 12 months before, HM Land Registry's figures show.

£416,000 typical price, the 12 months to August 2026
£386,250 12 months to August 2025
▲ up 7.7% on the 12 months before
  • Detached £711,250 8 sales
  • Semi-detached £560,000 13 sales
  • Terraced £465,000 25 sales
  • Flat or maisonette £300,000 35 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 4. 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 4

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 4ABTW18 4AFTW18 4AGTW18 4AHTW18 4AJTW18 4ALTW18 4APTW18 4ARTW18 4ASTW18 4ATTW18 4AXTW18 4AYTW18 4AZTW18 4BBTW18 4BDTW18 4BFTW18 4BGTW18 4BJTW18 4BLTW18 4BNTW18 4BPTW18 4BSTW18 4BUTW18 4BWTW18 4BYTW18 4DDTW18 4DETW18 4DFTW18 4DLTW18 4DNTW18 4DPTW18 4DQTW18 4DRTW18 4DYTW18 4EATW18 4EBTW18 4EETW18 4EJTW18 4ENTW18 4EPTW18 4EQTW18 4EWTW18 4EXTW18 4EYTW18 4EZTW18 4HATW18 4HBTW18 4HDTW18 4HFTW18 4HLTW18 4HNTW18 4HPTW18 4HRTW18 4HSTW18 4HTTW18 4HUTW18 4HWTW18 4HXTW18 4HYTW18 4HZTW18 4JBTW18 4JGTW18 4JHTW18 4JJTW18 4JLTW18 4JNTW18 4JQTW18 4JRTW18 4JTTW18 4JUTW18 4JWTW18 4JXTW18 4JYTW18 4JZTW18 4LATW18 4LBTW18 4LDTW18 4LGTW18 4LHTW18 4LPTW18 4LQTW18 4LRTW18 4LSTW18 4LTTW18 4LUTW18 4LWTW18 4LXTW18 4LYTW18 4LZTW18 4NBTW18 4NDTW18 4NETW18 4NFTW18 4NGTW18 4NHTW18 4NJTW18 4NLTW18 4NPTW18 4NQTW18 4NRTW18 4NSTW18 4NTTW18 4NUTW18 4NWTW18 4NXTW18 4NZTW18 4PATW18 4PBTW18 4PDTW18 4PGTW18 4PPTW18 4PQTW18 4PRTW18 4PSTW18 4PTTW18 4PWTW18 4QBTW18 4QDTW18 4QETW18 4QHTW18 4QJTW18 4QLTW18 4QNTW18 4QPTW18 4QUTW18 4QXTW18 4QYTW18 4QZTW18 4RBTW18 4RHTW18 4RJTW18 4RLTW18 4RNTW18 4RPTW18 4RRTW18 4RSTW18 4RTTW18 4RUTW18 4RWTW18 4RXTW18 4RYTW18 4RZTW18 4SDTW18 4SGTW18 4SHTW18 4SJTW18 4SNTW18 4SPTW18 4SUTW18 4SWTW18 4SYTW18 4TATW18 4TBTW18 4TDTW18 4TGTW18 4TNTW18 4TSTW18 4TTTW18 4TUTW18 4TWTW18 4TXTW18 4TYTW18 4TZTW18 4UATW18 4UPTW18 4USTW18 4UWTW18 4WATW18 4WBTW18 4XETW18 4XFTW18 4XHTW18 4XLTW18 4XNTW18 4XPTW18 4XRTW18 4XSTW18 4XTTW18 4XXTW18 4XYTW18 4XZTW18 4YATW18 4YDTW18 4YETW18 4YFTW18 4YGTW18 4YHTW18 4YJTW18 4YPTW18 4YRTW18 4YTTW18 4YUTW18 4YWTW18 4YXTW18 4YYTW18 4YZTW18 4ZBTW18 4ZNTW18 4ZTTW18 4ZUTW18 4ZWTW18 4ZX

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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