TW1 4 postcode sector in the TW1 district

TW1 4 is a sector of the TW1 district: every postcode that starts TW1 4. It has 168 postcodes in use, 6 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 TW1 4 sector, by flood risk

Map of every postcode in the TW1 4 sector, by flood risk Of the 168 postcodes in the TW1 4 sector that ONS places, 8 have a home or business at high risk, 13 are at medium risk at worst, 5 are at low risk at worst and 142 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 11 postcodes at high or medium risk; 8 postcodes at high or medium risk. Places named: South Twickenham, Twickenham Riverside. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A309A305 TW1 4AD: not on the flood risk listTW1 4AE: not on the flood risk listTW1 4AF: not on the flood risk listTW1 4AG: not on the flood risk listTW1 4AJ: not on the flood risk listTW1 4AQ: not on the flood risk listTW1 4AS: not on the flood risk listTW1 4AT: not on the flood risk listTW1 4AW: not on the flood risk listTW1 4AX: not on the flood risk listTW1 4AZ: not on the flood risk listTW1 4BB: not on the flood risk listTW1 4BF: not on the flood risk listTW1 4BH: not on the flood risk listTW1 4BN: not on the flood risk listTW1 4BP: not on the flood risk listTW1 4BQ: not on the flood risk listTW1 4BW: not on the flood risk listTW1 4BX: not on the flood risk listTW1 4BY: not on the flood risk listTW1 4BZ: not on the flood risk listTW1 4DB: not on the flood risk listTW1 4DG: not on the flood risk listTW1 4DH: not on the flood risk listTW1 4DN: not on the flood risk listTW1 4DP: not on the flood risk listTW1 4DQ: not on the flood risk listTW1 4DR: not on the flood risk listTW1 4DS: not on the flood risk listTW1 4EA: not on the flood risk listTW1 4EG: not on the flood risk listTW1 4EN: not on the flood risk listTW1 4ES: not on the flood risk listTW1 4ET: not on the flood risk listTW1 4EU: not on the flood risk listTW1 4EX: not on the flood risk listTW1 4EY: not on the flood risk listTW1 4EZ: not on the flood risk listTW1 4HB: not on the flood risk listTW1 4HD: not on the flood risk listTW1 4HE: not on the flood risk listTW1 4HF: not on the flood risk listTW1 4HG: not on the flood risk listTW1 4HH: not on the flood risk listTW1 4HJ: not on the flood risk listTW1 4HQ: not on the flood risk listTW1 4HR: not on the flood risk listTW1 4HS: not on the flood risk listTW1 4HT: not on the flood risk listTW1 4HU: not on the flood risk listTW1 4HW: not on the flood risk listTW1 4HX: not on the flood risk listTW1 4HY: not on the flood risk listTW1 4HZ: not on the flood risk listTW1 4JA: not on the flood risk listTW1 4JB: not on the flood risk listTW1 4JF: not on the flood risk listTW1 4JG: not on the flood risk listTW1 4JH: not on the flood risk listTW1 4JJ: not on the flood risk listTW1 4JP: not on the flood risk listTW1 4JQ: not on the flood risk listTW1 4JR: not on the flood risk listTW1 4JT: not on the flood risk listTW1 4JU: not on the flood risk listTW1 4JW: not on the flood risk listTW1 4JX: not on the flood risk listTW1 4JY: not on the flood risk listTW1 4JZ: not on the flood risk listTW1 4LA: not on the flood risk listTW1 4LE: not on the flood risk listTW1 4LG: not on the flood risk listTW1 4LJ: not on the flood risk listTW1 4LL: not on the flood risk listTW1 4LR: not on the flood risk listTW1 4LS: not on the flood risk listTW1 4LT: not on the flood risk listTW1 4LU: not on the flood risk listTW1 4LX: not on the flood risk listTW1 4LY: not on the flood risk listTW1 4LZ: not on the flood risk listTW1 4NA: not on the flood risk listTW1 4NB: not on the flood risk listTW1 4ND: not on the flood risk listTW1 4NE: not on the flood risk listTW1 4NF: not on the flood risk listTW1 4NG: not on the flood risk listTW1 4NH: not on the flood risk listTW1 4NJ: not on the flood risk listTW1 4NL: not on the flood risk listTW1 4NQ: not on the flood risk listTW1 4PB: not on the flood risk listTW1 4PD: not on the flood risk listTW1 4PE: not on the flood risk listTW1 4PG: not on the flood risk listTW1 4PH: not on the flood risk listTW1 4PJ: not on the flood risk listTW1 4PL: not on the flood risk listTW1 4PP: not on the flood risk listTW1 4PQ: not on the flood risk listTW1 4PR: not on the flood risk listTW1 4PT: not on the flood risk listTW1 4PU: not on the flood risk listTW1 4PW: not on the flood risk listTW1 4PX: not on the flood risk listTW1 4PY: not on the flood risk listTW1 4PZ: not on the flood risk listTW1 4QA: not on the flood risk listTW1 4QB: not on the flood risk listTW1 4QD: not on the flood risk listTW1 4QN: not on the flood risk listTW1 4QP: not on the flood risk listTW1 4QR: not on the flood risk listTW1 4QS: not on the flood risk listTW1 4QT: not on the flood risk listTW1 4QU: not on the flood risk listTW1 4QW: not on the flood risk listTW1 4QX: not on the flood risk listTW1 4QY: not on the flood risk listTW1 4QZ: not on the flood risk listTW1 4RA: not on the flood risk listTW1 4RE: not on the flood risk listTW1 4RF: not on the flood risk listTW1 4RG: not on the flood risk listTW1 4RL: not on the flood risk listTW1 4RQ: not on the flood risk listTW1 4RT: not on the flood risk listTW1 4SU: not on the flood risk listTW1 4SX: not on the flood risk listTW1 4SY: not on the flood risk listTW1 4SZ: not on the flood risk listTW1 4TA: not on the flood risk listTW1 4TB: not on the flood risk listTW1 4TD: not on the flood risk listTW1 4TE: not on the flood risk listTW1 4TF: not on the flood risk listTW1 4TG: not on the flood risk listTW1 4TH: not on the flood risk listTW1 4TL: not on the flood risk listTW1 4TN: not on the flood risk listTW1 4TP: not on the flood risk listTW1 4TT: not on the flood risk listTW1 4PA: low flood risk at worstTW1 4PS: low flood risk at worstTW1 4QJ: low flood risk at worstTW1 4RB: low flood risk at worstTW1 4SG: low flood risk at worstTW1 4RU: medium flood risk at worstTW1 4SB: medium flood risk at worstTW1 4SD: medium flood risk at worstTW1 4SE: medium flood risk at worstTW1 4SF: medium flood risk at worstTW1 4SH: medium flood risk at worstTW1 4SL: medium flood risk at worstTW1 4SQ: medium flood risk at worstTW1 4SR: medium flood risk at worstTW1 4ST: medium flood risk at worstTW1 4TJ: medium flood risk at worstTW1 4TQ: medium flood risk at worstTW1 4TR: medium flood risk at worstTW1 4QG: high flood riskTW1 4QH: high flood riskTW1 4QL: high flood riskTW1 4RP: high flood riskTW1 4RX: high flood riskTW1 4RY: high flood riskTW1 4SJ: high flood riskTW1 4SW: high flood risk South TwickenhamTwickenham Riverside 11 postcodes at high or medium risk, outlined: this goes to TW1 4SW, the one with most homes and businesses at high risk11 postcodes at high or medium risk8 postcodes at high or medium risk, outlined: this goes to TW1 4RX, the one with most homes and businesses at high risk8 postcodes at high or medium risk Map of every postcode in the TW1 4 sector, by flood risk Of the 168 postcodes in the TW1 4 sector that ONS places, 8 have a home or business at high risk, 13 are at medium risk at worst, 5 are at low risk at worst and 142 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 11 postcodes at high or medium risk; 8 postcodes at high or medium risk. Places named: South Twickenham, Twickenham Riverside. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. South TwickenhamTwickenham Riverside
  • A home or business at high risk: 8
  • At medium risk at worst: 13
  • At low risk at worst: 5
  • At very low risk only: 0
  • Not on the at-risk list: 142
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 168 postcodes in the TW1 4 sector that ONS places, 8 have a home or business at high risk, 13 are at medium risk at worst, 5 are at low risk at worst and 142 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. 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

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

TW1 4RX11 at high riskTW1 4QH6 at high riskTW1 4QG4 at high riskTW1 4SW3 at high riskTW1 4SJ2 at high riskTW1 4RP2 at high riskTW1 4QL1 at high riskTW1 4RY1 at high risk

Where the postcodes at high or medium risk lie together

  • 11 postcodes at high or medium risk, outlined on the map. TW1 4SW, is the one with most homes and businesses at high risk.
  • 8 postcodes at high or medium risk, outlined on the map. TW1 4RX, is the one with most homes and businesses at high risk.

What do homes sell for in TW1 4?

Homes in TW1 4 sold for a typical £825,000 in the 12 months to August 2026, across 82 sales, up 17.7% on the 12 months before, HM Land Registry's figures show.

£825,000 typical price, the 12 months to August 2026
£701,195 12 months to August 2025
▲ up 17.7% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached £1,270,750 16 sales
  • Terraced £925,000 39 sales
  • Flat or maisonette £415,000 26 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 TW1 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 TW1 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.

TW1 4ADTW1 4AETW1 4AFTW1 4AGTW1 4AJTW1 4AQTW1 4ASTW1 4ATTW1 4AWTW1 4AXTW1 4AZTW1 4BBTW1 4BFTW1 4BHTW1 4BNTW1 4BPTW1 4BQTW1 4BWTW1 4BXTW1 4BYTW1 4BZTW1 4DBTW1 4DGTW1 4DHTW1 4DNTW1 4DPTW1 4DQTW1 4DRTW1 4DSTW1 4EATW1 4EGTW1 4ENTW1 4ESTW1 4ETTW1 4EUTW1 4EXTW1 4EYTW1 4EZTW1 4HBTW1 4HDTW1 4HETW1 4HFTW1 4HGTW1 4HHTW1 4HJTW1 4HQTW1 4HRTW1 4HSTW1 4HTTW1 4HUTW1 4HWTW1 4HXTW1 4HYTW1 4HZTW1 4JATW1 4JBTW1 4JFTW1 4JGTW1 4JHTW1 4JJTW1 4JPTW1 4JQTW1 4JRTW1 4JTTW1 4JUTW1 4JWTW1 4JXTW1 4JYTW1 4JZTW1 4LATW1 4LETW1 4LGTW1 4LJTW1 4LLTW1 4LRTW1 4LSTW1 4LTTW1 4LUTW1 4LXTW1 4LYTW1 4LZTW1 4NATW1 4NBTW1 4NDTW1 4NETW1 4NFTW1 4NGTW1 4NHTW1 4NJTW1 4NLTW1 4NQTW1 4PATW1 4PBTW1 4PDTW1 4PETW1 4PGTW1 4PHTW1 4PJTW1 4PLTW1 4PPTW1 4PQTW1 4PRTW1 4PSTW1 4PTTW1 4PUTW1 4PWTW1 4PXTW1 4PYTW1 4PZTW1 4QATW1 4QBTW1 4QDTW1 4QGTW1 4QHTW1 4QJTW1 4QLTW1 4QNTW1 4QPTW1 4QRTW1 4QSTW1 4QTTW1 4QUTW1 4QWTW1 4QXTW1 4QYTW1 4QZTW1 4RATW1 4RBTW1 4RETW1 4RFTW1 4RGTW1 4RLTW1 4RPTW1 4RQTW1 4RTTW1 4RUTW1 4RXTW1 4RYTW1 4SBTW1 4SDTW1 4SETW1 4SFTW1 4SGTW1 4SHTW1 4SJTW1 4SLTW1 4SQTW1 4SRTW1 4STTW1 4SUTW1 4SWTW1 4SXTW1 4SYTW1 4SZTW1 4TATW1 4TBTW1 4TDTW1 4TETW1 4TFTW1 4TGTW1 4THTW1 4TJTW1 4TLTW1 4TNTW1 4TPTW1 4TQTW1 4TRTW1 4TT

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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