TW18 1 postcode sector in the TW18 district

TW18 1 is a sector of the TW18 district: every postcode that starts TW18 1. It has 202 postcodes in use, 7 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 1 sector, by flood risk

Map of every postcode in the TW18 1 sector, by flood risk Of the 202 postcodes in the TW18 1 sector that ONS places, 13 have a home or business at high risk, 19 are at medium risk at worst, 90 are at low risk at worst, 49 are at very low risk only and 31 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: Staines-upon-Thames, Laleham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A308M3A320 TW18 1AL: not on the flood risk listTW18 1BF: not on the flood risk listTW18 1EB: not on the flood risk listTW18 1EE: not on the flood risk listTW18 1EF: not on the flood risk listTW18 1EG: not on the flood risk listTW18 1HA: not on the flood risk listTW18 1HJ: not on the flood risk listTW18 1HL: not on the flood risk listTW18 1HN: not on the flood risk listTW18 1HP: not on the flood risk listTW18 1HW: not on the flood risk listTW18 1LN: not on the flood risk listTW18 1LQ: not on the flood risk listTW18 1LR: not on the flood risk listTW18 1PY: not on the flood risk listTW18 1SD: not on the flood risk listTW18 1SH: not on the flood risk listTW18 1SL: not on the flood risk listTW18 1SN: not on the flood risk listTW18 1SP: not on the flood risk listTW18 1SQ: not on the flood risk listTW18 1SR: not on the flood risk listTW18 1ST: not on the flood risk listTW18 1SW: not on the flood risk listTW18 1SY: not on the flood risk listTW18 1SZ: not on the flood risk listTW18 1UD: not on the flood risk listTW18 1UE: not on the flood risk listTW18 1UG: not on the flood risk listTW18 1AA: very low flood risk onlyTW18 1AE: very low flood risk onlyTW18 1AS: very low flood risk onlyTW18 1AU: very low flood risk onlyTW18 1AX: very low flood risk onlyTW18 1AY: very low flood risk onlyTW18 1AZ: very low flood risk onlyTW18 1BA: very low flood risk onlyTW18 1BB: very low flood risk onlyTW18 1BJ: very low flood risk onlyTW18 1BL: very low flood risk onlyTW18 1BP: very low flood risk onlyTW18 1BT: very low flood risk onlyTW18 1BU: very low flood risk onlyTW18 1BX: very low flood risk onlyTW18 1BZ: very low flood risk onlyTW18 1DA: very low flood risk onlyTW18 1DB: very low flood risk onlyTW18 1DE: very low flood risk onlyTW18 1DZ: very low flood risk onlyTW18 1ED: very low flood risk onlyTW18 1GA: very low flood risk onlyTW18 1HX: very low flood risk onlyTW18 1HY: very low flood risk onlyTW18 1HZ: very low flood risk onlyTW18 1JA: very low flood risk onlyTW18 1JB: very low flood risk onlyTW18 1JD: very low flood risk onlyTW18 1JE: very low flood risk onlyTW18 1JF: very low flood risk onlyTW18 1JG: very low flood risk onlyTW18 1JH: very low flood risk onlyTW18 1JJ: very low flood risk onlyTW18 1JL: very low flood risk onlyTW18 1JQ: very low flood risk onlyTW18 1JY: very low flood risk onlyTW18 1LH: very low flood risk onlyTW18 1LJ: very low flood risk onlyTW18 1LP: very low flood risk onlyTW18 1LS: very low flood risk onlyTW18 1LT: very low flood risk onlyTW18 1LU: very low flood risk onlyTW18 1LW: very low flood risk onlyTW18 1NE: very low flood risk onlyTW18 1PD: very low flood risk onlyTW18 1TB: very low flood risk onlyTW18 1TD: very low flood risk onlyTW18 1XS: very low flood risk onlyTW18 1AB: low flood risk at worstTW18 1AH: low flood risk at worstTW18 1AQ: low flood risk at worstTW18 1AT: low flood risk at worstTW18 1AW: low flood risk at worstTW18 1BD: low flood risk at worstTW18 1BG: low flood risk at worstTW18 1BY: low flood risk at worstTW18 1DD: low flood risk at worstTW18 1DF: low flood risk at worstTW18 1DG: low flood risk at worstTW18 1DH: low flood risk at worstTW18 1DJ: low flood risk at worstTW18 1DL: low flood risk at worstTW18 1DN: low flood risk at worstTW18 1DP: low flood risk at worstTW18 1DQ: low flood risk at worstTW18 1DR: low flood risk at worstTW18 1DW: low flood risk at worstTW18 1EA: low flood risk at worstTW18 1EH: low flood risk at worstTW18 1EN: low flood risk at worstTW18 1EP: low flood risk at worstTW18 1EQ: low flood risk at worstTW18 1ER: low flood risk at worstTW18 1ES: low flood risk at worstTW18 1ET: low flood risk at worstTW18 1EW: low flood risk at worstTW18 1FB: low flood risk at worstTW18 1GN: low flood risk at worstTW18 1HB: low flood risk at worstTW18 1HD: low flood risk at worstTW18 1HE: low flood risk at worstTW18 1HF: low flood risk at worstTW18 1HG: low flood risk at worstTW18 1HQ: low flood risk at worstTW18 1HR: low flood risk at worstTW18 1HS: low flood risk at worstTW18 1JN: low flood risk at worstTW18 1JP: low flood risk at worstTW18 1JR: low flood risk at worstTW18 1JS: low flood risk at worstTW18 1JT: low flood risk at worstTW18 1JU: low flood risk at worstTW18 1JW: low flood risk at worstTW18 1JX: low flood risk at worstTW18 1JZ: low flood risk at worstTW18 1LX: low flood risk at worstTW18 1LY: low flood risk at worstTW18 1LZ: low flood risk at worstTW18 1NA: low flood risk at worstTW18 1NB: low flood risk at worstTW18 1ND: low flood risk at worstTW18 1NF: low flood risk at worstTW18 1NG: low flood risk at worstTW18 1NH: low flood risk at worstTW18 1NQ: low flood risk at worstTW18 1PA: low flood risk at worstTW18 1PB: low flood risk at worstTW18 1PE: low flood risk at worstTW18 1PF: low flood risk at worstTW18 1PG: low flood risk at worstTW18 1PH: low flood risk at worstTW18 1PJ: low flood risk at worstTW18 1PL: low flood risk at worstTW18 1PN: low flood risk at worstTW18 1PP: low flood risk at worstTW18 1PQ: low flood risk at worstTW18 1PR: low flood risk at worstTW18 1PS: low flood risk at worstTW18 1PT: low flood risk at worstTW18 1PW: low flood risk at worstTW18 1PX: low flood risk at worstTW18 1QF: low flood risk at worstTW18 1QG: low flood risk at worstTW18 1QJ: low flood risk at worstTW18 1QL: low flood risk at worstTW18 1QN: low flood risk at worstTW18 1QP: low flood risk at worstTW18 1QQ: low flood risk at worstTW18 1QW: low flood risk at worstTW18 1RP: low flood risk at worstTW18 1RY: low flood risk at worstTW18 1RZ: low flood risk at worstTW18 1SE: low flood risk at worstTW18 1SJ: low flood risk at worstTW18 1TA: low flood risk at worstTW18 1UB: low flood risk at worstTW18 1UF: low flood risk at worstTW18 1XB: low flood risk at worstTW18 1AG: medium flood risk at worstTW18 1AN: medium flood risk at worstTW18 1AR: medium flood risk at worstTW18 1EJ: medium flood risk at worstTW18 1EL: medium flood risk at worstTW18 1QR: medium flood risk at worstTW18 1QS: medium flood risk at worstTW18 1QT: medium flood risk at worstTW18 1QU: medium flood risk at worstTW18 1QX: medium flood risk at worstTW18 1QY: medium flood risk at worstTW18 1QZ: medium flood risk at worstTW18 1RB: medium flood risk at worstTW18 1RR: medium flood risk at worstTW18 1RS: medium flood risk at worstTW18 1RT: medium flood risk at worstTW18 1RU: medium flood risk at worstTW18 1RW: medium flood risk at worstTW18 1XH: medium flood risk at worstTW18 1AD: high flood riskTW18 1AJ: high flood riskTW18 1AP: high flood riskTW18 1DS: high flood riskTW18 1HH: high flood riskTW18 1RX: high flood riskTW18 1SB: high flood riskTW18 1SS: high flood riskTW18 1SX: high flood riskTW18 1UA: high flood riskTW18 1UQ: high flood riskTW18 1XD: high flood riskTW18 1YA: high flood risk Staines-upon-ThamesLaleham 9 postcodes at high or medium risk, outlined: this goes to TW18 1QX, the one with most homes and businesses at high risk9 postcodes at high or medium risk Map of every postcode in the TW18 1 sector, by flood risk Of the 202 postcodes in the TW18 1 sector that ONS places, 13 have a home or business at high risk, 19 are at medium risk at worst, 90 are at low risk at worst, 49 are at very low risk only and 31 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: Staines-upon-Thames, Laleham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A308A320 Staines-upon-ThamesLaleham
  • A home or business at high risk: 13
  • At medium risk at worst: 19
  • At low risk at worst: 90
  • At very low risk only: 49
  • Not on the at-risk list: 31
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 202 postcodes in the TW18 1 sector that ONS places, 13 have a home or business at high risk, 19 are at medium risk at worst, 90 are at low risk at worst, 49 are at very low risk only and 31 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.

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

13 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 1DS13 at high riskTW18 1AJ11 at high riskTW18 1UQ8 at high riskTW18 1SS7 at high riskTW18 1RX6 at high riskTW18 1AP4 at high riskTW18 1SB3 at high riskTW18 1XD3 at high riskTW18 1SX2 at high riskTW18 1UA2 at high riskTW18 1HH1 at high riskTW18 1YA1 at high risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

TW18 1XE

Where the postcodes at high or medium risk lie together

  • 9 postcodes at high or medium risk, outlined on the map. TW18 1QX, is the one with most homes and businesses at high risk.

What do homes sell for in TW18 1?

Homes in TW18 1 sold for a typical £470,000 in the 12 months to August 2026, across 83 sales, down 4.1% on the 12 months before, HM Land Registry's figures show.

£470,000 typical price, the 12 months to August 2026
£490,000 12 months to August 2025
▼ down 4.1% on the 12 months before
  • Detached £685,000 7 sales
  • Semi-detached £530,000 41 sales
  • Terraced £452,000 25 sales
  • Flat or maisonette £303,500 10 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 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 TW18 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.

TW18 1AATW18 1ABTW18 1ADTW18 1AETW18 1AGTW18 1AHTW18 1AJTW18 1ALTW18 1ANTW18 1APTW18 1AQTW18 1ARTW18 1ASTW18 1ATTW18 1AUTW18 1AWTW18 1AXTW18 1AYTW18 1AZTW18 1BATW18 1BBTW18 1BDTW18 1BFTW18 1BGTW18 1BHTW18 1BJTW18 1BLTW18 1BPTW18 1BTTW18 1BUTW18 1BXTW18 1BYTW18 1BZTW18 1DATW18 1DBTW18 1DDTW18 1DETW18 1DFTW18 1DGTW18 1DHTW18 1DJTW18 1DLTW18 1DNTW18 1DPTW18 1DQTW18 1DRTW18 1DSTW18 1DWTW18 1DZTW18 1EATW18 1EBTW18 1EDTW18 1EETW18 1EFTW18 1EGTW18 1EHTW18 1EJTW18 1ELTW18 1ENTW18 1EPTW18 1EQTW18 1ERTW18 1ESTW18 1ETTW18 1EWTW18 1FBTW18 1GATW18 1GNTW18 1HATW18 1HBTW18 1HDTW18 1HETW18 1HFTW18 1HGTW18 1HHTW18 1HJTW18 1HLTW18 1HNTW18 1HPTW18 1HQTW18 1HRTW18 1HSTW18 1HWTW18 1HXTW18 1HYTW18 1HZTW18 1JATW18 1JBTW18 1JDTW18 1JETW18 1JFTW18 1JGTW18 1JHTW18 1JJTW18 1JLTW18 1JNTW18 1JPTW18 1JQTW18 1JRTW18 1JSTW18 1JTTW18 1JUTW18 1JWTW18 1JXTW18 1JYTW18 1JZTW18 1LHTW18 1LJTW18 1LNTW18 1LPTW18 1LQTW18 1LRTW18 1LSTW18 1LTTW18 1LUTW18 1LWTW18 1LXTW18 1LYTW18 1LZTW18 1NATW18 1NBTW18 1NDTW18 1NETW18 1NFTW18 1NGTW18 1NHTW18 1NQTW18 1PATW18 1PBTW18 1PDTW18 1PETW18 1PFTW18 1PGTW18 1PHTW18 1PJTW18 1PLTW18 1PNTW18 1PPTW18 1PQTW18 1PRTW18 1PSTW18 1PTTW18 1PWTW18 1PXTW18 1PYTW18 1QFTW18 1QGTW18 1QJTW18 1QLTW18 1QNTW18 1QPTW18 1QQTW18 1QRTW18 1QSTW18 1QTTW18 1QUTW18 1QWTW18 1QXTW18 1QYTW18 1QZTW18 1RBTW18 1RPTW18 1RRTW18 1RSTW18 1RTTW18 1RUTW18 1RWTW18 1RXTW18 1RYTW18 1RZTW18 1SBTW18 1SDTW18 1SETW18 1SHTW18 1SJTW18 1SLTW18 1SNTW18 1SPTW18 1SQTW18 1SRTW18 1SSTW18 1STTW18 1SWTW18 1SXTW18 1SYTW18 1SZTW18 1TATW18 1TBTW18 1TDTW18 1UATW18 1UBTW18 1UDTW18 1UETW18 1UFTW18 1UGTW18 1UQTW18 1XBTW18 1XDTW18 1XETW18 1XHTW18 1XSTW18 1YA

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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