SW3 4 postcode sector in the SW3 district

SW3 4 is a sector of the SW3 district: every postcode that starts SW3 4. It has 150 postcodes in use, 2 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 SW3 4 sector, by flood risk

Map of every postcode in the SW3 4 sector, by flood risk Of the 150 postcodes in the SW3 4 sector that ONS places, 21 are at very low risk only and 129 are not on the Environment Agency's at-risk list. Places named: Royal Hospital. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A3216 SW3 4AA: not on the flood risk listSW3 4AB: not on the flood risk listSW3 4AD: not on the flood risk listSW3 4AE: not on the flood risk listSW3 4AF: not on the flood risk listSW3 4AH: not on the flood risk listSW3 4AJ: not on the flood risk listSW3 4AN: not on the flood risk listSW3 4AP: not on the flood risk listSW3 4AQ: not on the flood risk listSW3 4AR: not on the flood risk listSW3 4AS: not on the flood risk listSW3 4AW: not on the flood risk listSW3 4BA: not on the flood risk listSW3 4BD: not on the flood risk listSW3 4BH: not on the flood risk listSW3 4BJ: not on the flood risk listSW3 4BL: not on the flood risk listSW3 4BN: not on the flood risk listSW3 4BP: not on the flood risk listSW3 4BT: not on the flood risk listSW3 4BU: not on the flood risk listSW3 4BX: not on the flood risk listSW3 4DA: not on the flood risk listSW3 4DH: not on the flood risk listSW3 4DJ: not on the flood risk listSW3 4DL: not on the flood risk listSW3 4DN: not on the flood risk listSW3 4DP: not on the flood risk listSW3 4DR: not on the flood risk listSW3 4DS: not on the flood risk listSW3 4DT: not on the flood risk listSW3 4DU: not on the flood risk listSW3 4DW: not on the flood risk listSW3 4DX: not on the flood risk listSW3 4DY: not on the flood risk listSW3 4EE: not on the flood risk listSW3 4EH: not on the flood risk listSW3 4EJ: not on the flood risk listSW3 4EN: not on the flood risk listSW3 4EP: not on the flood risk listSW3 4ER: not on the flood risk listSW3 4ET: not on the flood risk listSW3 4EU: not on the flood risk listSW3 4EW: not on the flood risk listSW3 4EX: not on the flood risk listSW3 4HA: not on the flood risk listSW3 4HH: not on the flood risk listSW3 4HJ: not on the flood risk listSW3 4HL: not on the flood risk listSW3 4HN: not on the flood risk listSW3 4HP: not on the flood risk listSW3 4HQ: not on the flood risk listSW3 4HT: not on the flood risk listSW3 4HW: not on the flood risk listSW3 4HY: not on the flood risk listSW3 4HZ: not on the flood risk listSW3 4JR: not on the flood risk listSW3 4JS: not on the flood risk listSW3 4JT: not on the flood risk listSW3 4JU: not on the flood risk listSW3 4JX: not on the flood risk listSW3 4LN: not on the flood risk listSW3 4LX: not on the flood risk listSW3 4LY: not on the flood risk listSW3 4LZ: not on the flood risk listSW3 4NB: not on the flood risk listSW3 4ND: not on the flood risk listSW3 4NE: not on the flood risk listSW3 4NG: not on the flood risk listSW3 4NJ: not on the flood risk listSW3 4NL: not on the flood risk listSW3 4NP: not on the flood risk listSW3 4NR: not on the flood risk listSW3 4NT: not on the flood risk listSW3 4NW: not on the flood risk listSW3 4NX: not on the flood risk listSW3 4PA: not on the flood risk listSW3 4PL: not on the flood risk listSW3 4PW: not on the flood risk listSW3 4QA: not on the flood risk listSW3 4QB: not on the flood risk listSW3 4QD: not on the flood risk listSW3 4QE: not on the flood risk listSW3 4QF: not on the flood risk listSW3 4QG: not on the flood risk listSW3 4QH: not on the flood risk listSW3 4QJ: not on the flood risk listSW3 4QP: not on the flood risk listSW3 4QQ: not on the flood risk listSW3 4QS: not on the flood risk listSW3 4QX: not on the flood risk listSW3 4RB: not on the flood risk listSW3 4RD: not on the flood risk listSW3 4RP: not on the flood risk listSW3 4SL: not on the flood risk listSW3 4SW: not on the flood risk listSW3 4SX: not on the flood risk listSW3 4SY: not on the flood risk listSW3 4SZ: not on the flood risk listSW3 4TB: not on the flood risk listSW3 4TD: not on the flood risk listSW3 4TE: not on the flood risk listSW3 4TF: not on the flood risk listSW3 4TG: not on the flood risk listSW3 4TH: not on the flood risk listSW3 4TP: not on the flood risk listSW3 4TQ: not on the flood risk listSW3 4TR: not on the flood risk listSW3 4TW: not on the flood risk listSW3 4TX: not on the flood risk listSW3 4TZ: not on the flood risk listSW3 4UD: not on the flood risk listSW3 4UG: not on the flood risk listSW3 4UJ: not on the flood risk listSW3 4UP: not on the flood risk listSW3 4UT: not on the flood risk listSW3 4UU: not on the flood risk listSW3 4UY: not on the flood risk listSW3 4UZ: not on the flood risk listSW3 4XA: not on the flood risk listSW3 4XB: not on the flood risk listSW3 4XD: not on the flood risk listSW3 4XH: not on the flood risk listSW3 4HS: very low flood risk onlySW3 4JA: very low flood risk onlySW3 4JB: very low flood risk onlySW3 4JD: very low flood risk onlySW3 4JE: very low flood risk onlySW3 4JG: very low flood risk onlySW3 4JH: very low flood risk onlySW3 4JJ: very low flood risk onlySW3 4JL: very low flood risk onlySW3 4JP: very low flood risk onlySW3 4LA: very low flood risk onlySW3 4LE: very low flood risk onlySW3 4LF: very low flood risk onlySW3 4LG: very low flood risk onlySW3 4LH: very low flood risk onlySW3 4LJ: very low flood risk onlySW3 4LL: very low flood risk onlySW3 4LQ: very low flood risk onlySW3 4LW: very low flood risk onlySW3 4SR: very low flood risk only Royal Hospital Map of every postcode in the SW3 4 sector, by flood risk Of the 150 postcodes in the SW3 4 sector that ONS places, 21 are at very low risk only and 129 are not on the Environment Agency's at-risk list. Places named: Royal Hospital. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Royal Hospital
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 21
  • Not on the at-risk list: 129

Of the 150 postcodes in the SW3 4 sector that ONS places, 21 are at very low risk only and 129 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. 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

What do homes sell for in SW3 4?

Homes in SW3 4 sold for a typical £1,410,000 in the 12 months to August 2026, across 45 sales, down 12% on the 12 months before, HM Land Registry's figures show.

£1,410,000 typical price, the 12 months to August 2026
£1,602,562 12 months to August 2025
▼ down 12% on the 12 months before
  • Terraced £3,900,000 15 sales
  • Flat or maisonette £1,090,000 30 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 SW3 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 SW3 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.

SW3 4AASW3 4ABSW3 4ADSW3 4AESW3 4AFSW3 4AHSW3 4AJSW3 4ANSW3 4APSW3 4AQSW3 4ARSW3 4ASSW3 4AWSW3 4BASW3 4BDSW3 4BHSW3 4BJSW3 4BLSW3 4BNSW3 4BPSW3 4BTSW3 4BUSW3 4BXSW3 4DASW3 4DHSW3 4DJSW3 4DLSW3 4DNSW3 4DPSW3 4DRSW3 4DSSW3 4DTSW3 4DUSW3 4DWSW3 4DXSW3 4DYSW3 4EESW3 4EHSW3 4EJSW3 4ENSW3 4EPSW3 4ERSW3 4ETSW3 4EUSW3 4EWSW3 4EXSW3 4HASW3 4HHSW3 4HJSW3 4HLSW3 4HNSW3 4HPSW3 4HQSW3 4HSSW3 4HTSW3 4HWSW3 4HYSW3 4HZSW3 4JASW3 4JBSW3 4JDSW3 4JESW3 4JGSW3 4JHSW3 4JJSW3 4JLSW3 4JPSW3 4JRSW3 4JSSW3 4JTSW3 4JUSW3 4JXSW3 4LASW3 4LESW3 4LFSW3 4LGSW3 4LHSW3 4LJSW3 4LLSW3 4LNSW3 4LQSW3 4LSSW3 4LWSW3 4LXSW3 4LYSW3 4LZSW3 4NBSW3 4NDSW3 4NESW3 4NGSW3 4NJSW3 4NLSW3 4NPSW3 4NRSW3 4NTSW3 4NWSW3 4NXSW3 4PASW3 4PLSW3 4PWSW3 4QASW3 4QBSW3 4QDSW3 4QESW3 4QFSW3 4QGSW3 4QHSW3 4QJSW3 4QPSW3 4QQSW3 4QSSW3 4QXSW3 4QYSW3 4QZSW3 4RASW3 4RBSW3 4RDSW3 4RPSW3 4RYSW3 4SLSW3 4SRSW3 4SWSW3 4SXSW3 4SYSW3 4SZSW3 4TASW3 4TBSW3 4TDSW3 4TESW3 4TFSW3 4TGSW3 4THSW3 4TPSW3 4TQSW3 4TRSW3 4TWSW3 4TXSW3 4TZSW3 4UDSW3 4UGSW3 4UJSW3 4UPSW3 4UTSW3 4UUSW3 4UYSW3 4UZSW3 4XASW3 4XBSW3 4XDSW3 4XH

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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