SW18 4 postcode sector in the SW18 district

SW18 4 is a sector of the SW18 district: every postcode that starts SW18 4. It has 244 postcodes in use, 5 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 SW18 4 sector, by flood risk

Map of every postcode in the SW18 4 sector, by flood risk Of the 244 postcodes in the SW18 4 sector that ONS places, 54 have a home or business at high risk, 70 are at medium risk at worst, 60 are at low risk at worst, 16 are at very low risk only and 44 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 93 postcodes at high or medium risk; 31 postcodes at high or medium risk. Places named: Wandsworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A218 SW18 4AL: not on the flood risk listSW18 4AR: not on the flood risk listSW18 4EY: not on the flood risk listSW18 4FA: not on the flood risk listSW18 4FS: not on the flood risk listSW18 4FU: not on the flood risk listSW18 4GE: not on the flood risk listSW18 4GF: not on the flood risk listSW18 4GH: not on the flood risk listSW18 4GR: not on the flood risk listSW18 4GT: not on the flood risk listSW18 4HD: not on the flood risk listSW18 4HX: not on the flood risk listSW18 4JE: not on the flood risk listSW18 4JJ: not on the flood risk listSW18 4LS: not on the flood risk listSW18 4NB: not on the flood risk listSW18 4PA: not on the flood risk listSW18 4PF: not on the flood risk listSW18 4PG: not on the flood risk listSW18 4PJ: not on the flood risk listSW18 4PL: not on the flood risk listSW18 4PP: not on the flood risk listSW18 4PR: not on the flood risk listSW18 4PS: not on the flood risk listSW18 4PW: not on the flood risk listSW18 4QJ: not on the flood risk listSW18 4QP: not on the flood risk listSW18 4RD: not on the flood risk listSW18 4RG: not on the flood risk listSW18 4RP: not on the flood risk listSW18 4SP: not on the flood risk listSW18 4SS: not on the flood risk listSW18 4TH: not on the flood risk listSW18 4TP: not on the flood risk listSW18 4TR: not on the flood risk listSW18 4UE: not on the flood risk listSW18 4EG: very low flood risk onlySW18 4EU: very low flood risk onlySW18 4EZ: very low flood risk onlySW18 4GY: very low flood risk onlySW18 4HA: very low flood risk onlySW18 4HB: very low flood risk onlySW18 4HE: very low flood risk onlySW18 4HJ: very low flood risk onlySW18 4HL: very low flood risk onlySW18 4HN: very low flood risk onlySW18 4HP: very low flood risk onlySW18 4HR: very low flood risk onlySW18 4HW: very low flood risk onlySW18 4ST: very low flood risk onlySW18 4SU: very low flood risk onlySW18 4SX: very low flood risk onlySW18 4AD: low flood risk at worstSW18 4AG: low flood risk at worstSW18 4AH: low flood risk at worstSW18 4AN: low flood risk at worstSW18 4AP: low flood risk at worstSW18 4AQ: low flood risk at worstSW18 4AU: low flood risk at worstSW18 4AY: low flood risk at worstSW18 4BA: low flood risk at worstSW18 4BB: low flood risk at worstSW18 4BD: low flood risk at worstSW18 4BE: low flood risk at worstSW18 4BG: low flood risk at worstSW18 4BH: low flood risk at worstSW18 4BJ: low flood risk at worstSW18 4BN: low flood risk at worstSW18 4BQ: low flood risk at worstSW18 4BT: low flood risk at worstSW18 4DD: low flood risk at worstSW18 4DH: low flood risk at worstSW18 4DU: low flood risk at worstSW18 4DW: low flood risk at worstSW18 4EB: low flood risk at worstSW18 4EQ: low flood risk at worstSW18 4EX: low flood risk at worstSW18 4FT: low flood risk at worstSW18 4GG: low flood risk at worstSW18 4GL: low flood risk at worstSW18 4GZ: low flood risk at worstSW18 4HF: low flood risk at worstSW18 4HG: low flood risk at worstSW18 4HH: low flood risk at worstSW18 4HQ: low flood risk at worstSW18 4HT: low flood risk at worstSW18 4JF: low flood risk at worstSW18 4JP: low flood risk at worstSW18 4LD: low flood risk at worstSW18 4LH: low flood risk at worstSW18 4NJ: low flood risk at worstSW18 4NZ: low flood risk at worstSW18 4PB: low flood risk at worstSW18 4PD: low flood risk at worstSW18 4PN: low flood risk at worstSW18 4QS: low flood risk at worstSW18 4RN: low flood risk at worstSW18 4SQ: low flood risk at worstSW18 4SR: low flood risk at worstSW18 4TE: low flood risk at worstSW18 4TS: low flood risk at worstSW18 4TW: low flood risk at worstSW18 4XF: low flood risk at worstSW18 4XG: low flood risk at worstSW18 4XH: low flood risk at worstSW18 4BF: medium flood risk at worstSW18 4BP: medium flood risk at worstSW18 4BS: medium flood risk at worstSW18 4BW: medium flood risk at worstSW18 4DA: medium flood risk at worstSW18 4DF: medium flood risk at worstSW18 4DL: medium flood risk at worstSW18 4DP: medium flood risk at worstSW18 4DQ: medium flood risk at worstSW18 4DR: medium flood risk at worstSW18 4DS: medium flood risk at worstSW18 4DT: medium flood risk at worstSW18 4DX: medium flood risk at worstSW18 4DY: medium flood risk at worstSW18 4EA: medium flood risk at worstSW18 4ED: medium flood risk at worstSW18 4EE: medium flood risk at worstSW18 4EH: medium flood risk at worstSW18 4EJ: medium flood risk at worstSW18 4ES: medium flood risk at worstSW18 4ET: medium flood risk at worstSW18 4FQ: medium flood risk at worstSW18 4FR: medium flood risk at worstSW18 4FW: medium flood risk at worstSW18 4FY: medium flood risk at worstSW18 4GJ: medium flood risk at worstSW18 4GP: medium flood risk at worstSW18 4GQ: medium flood risk at worstSW18 4GS: medium flood risk at worstSW18 4HU: medium flood risk at worstSW18 4HY: medium flood risk at worstSW18 4HZ: medium flood risk at worstSW18 4JA: medium flood risk at worstSW18 4JG: medium flood risk at worstSW18 4JS: medium flood risk at worstSW18 4JT: medium flood risk at worstSW18 4JY: medium flood risk at worstSW18 4LA: medium flood risk at worstSW18 4LB: medium flood risk at worstSW18 4LJ: medium flood risk at worstSW18 4LL: medium flood risk at worstSW18 4LU: medium flood risk at worstSW18 4LX: medium flood risk at worstSW18 4NL: medium flood risk at worstSW18 4NN: medium flood risk at worstSW18 4NP: medium flood risk at worstSW18 4NR: medium flood risk at worstSW18 4NS: medium flood risk at worstSW18 4NT: medium flood risk at worstSW18 4NX: medium flood risk at worstSW18 4NY: medium flood risk at worstSW18 4PT: medium flood risk at worstSW18 4QN: medium flood risk at worstSW18 4RR: medium flood risk at worstSW18 4RZ: medium flood risk at worstSW18 4SD: medium flood risk at worstSW18 4SF: medium flood risk at worstSW18 4SL: medium flood risk at worstSW18 4SW: medium flood risk at worstSW18 4TF: medium flood risk at worstSW18 4TG: medium flood risk at worstSW18 4TQ: medium flood risk at worstSW18 4UD: medium flood risk at worstSW18 4UJ: medium flood risk at worstSW18 4UL: medium flood risk at worstSW18 4UN: medium flood risk at worstSW18 4UR: medium flood risk at worstSW18 4UT: medium flood risk at worstSW18 4UW: medium flood risk at worstSW18 4AS: high flood riskSW18 4AT: high flood riskSW18 4AX: high flood riskSW18 4AZ: high flood riskSW18 4DJ: high flood riskSW18 4DN: high flood riskSW18 4EF: high flood riskSW18 4EL: high flood riskSW18 4EN: high flood riskSW18 4EP: high flood riskSW18 4ER: high flood riskSW18 4EW: high flood riskSW18 4GA: high flood riskSW18 4LN: high flood riskSW18 4LR: high flood riskSW18 4LT: high flood riskSW18 4LW: high flood riskSW18 4LY: high flood riskSW18 4LZ: high flood riskSW18 4NU: high flood riskSW18 4NW: high flood riskSW18 4PU: high flood riskSW18 4PX: high flood riskSW18 4PY: high flood riskSW18 4PZ: high flood riskSW18 4QA: high flood riskSW18 4QB: high flood riskSW18 4QD: high flood riskSW18 4QE: high flood riskSW18 4QF: high flood riskSW18 4QL: high flood riskSW18 4QR: high flood riskSW18 4QT: high flood riskSW18 4QW: high flood riskSW18 4QX: high flood riskSW18 4QZ: high flood riskSW18 4RA: high flood riskSW18 4RB: high flood riskSW18 4RE: high flood riskSW18 4RL: high flood riskSW18 4RQ: high flood riskSW18 4RS: high flood riskSW18 4RU: high flood riskSW18 4RW: high flood riskSW18 4RX: high flood riskSW18 4RY: high flood riskSW18 4SA: high flood riskSW18 4SB: high flood riskSW18 4SH: high flood riskSW18 4SJ: high flood riskSW18 4SN: high flood riskSW18 4UH: high flood risk Wandsworth 93 postcodes at high or medium risk, outlined: this goes to SW18 4SB, the one with most homes and businesses at high risk93 postcodes at high or medium risk31 postcodes at high or medium risk, outlined: this goes to SW18 4GB, the one with most homes and businesses at high risk31 postcodes at high or medium risk Map of every postcode in the SW18 4 sector, by flood risk Of the 244 postcodes in the SW18 4 sector that ONS places, 54 have a home or business at high risk, 70 are at medium risk at worst, 60 are at low risk at worst, 16 are at very low risk only and 44 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 93 postcodes at high or medium risk; 31 postcodes at high or medium risk. Places named: Wandsworth Town, Wandle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Wandsworth TownWandle
  • A home or business at high risk: 54
  • At medium risk at worst: 70
  • At low risk at worst: 60
  • At very low risk only: 16
  • Not on the at-risk list: 44
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 244 postcodes in the SW18 4 sector that ONS places, 54 have a home or business at high risk, 70 are at medium risk at worst, 60 are at low risk at worst, 16 are at very low risk only and 44 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

54 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.

SW18 4SB79 at high riskSW18 4RL70 at high riskSW18 4GB58 at high riskSW18 4QD58 at high riskSW18 4GA57 at high riskSW18 4PY56 at high riskSW18 4GD47 at high riskSW18 4RX33 at high riskSW18 4RY32 at high riskSW18 4NW31 at high riskSW18 4QB31 at high riskSW18 4QR30 at high risk

Where the postcodes at high or medium risk lie together

  • 93 postcodes at high or medium risk, outlined on the map. SW18 4SB, is the one with most homes and businesses at high risk.
  • 31 postcodes at high or medium risk, outlined on the map. SW18 4GB, is the one with most homes and businesses at high risk.

What do homes sell for in SW18 4?

Homes in SW18 4 sold for a typical £515,000 in the 12 months to August 2026, across 164 sales, up 3% on the 12 months before, HM Land Registry's figures show.

£515,000 typical price, the 12 months to August 2026
£500,000 12 months to August 2025
▲ up 3% on the 12 months before
  • Semi-detached 1 sale, too few to price
  • Terraced £1,003,750 28 sales
  • Flat or maisonette £455,000 135 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 SW18 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 SW18 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.

SW18 4ADSW18 4AGSW18 4AHSW18 4ALSW18 4ANSW18 4APSW18 4AQSW18 4ARSW18 4ASSW18 4ATSW18 4AUSW18 4AXSW18 4AYSW18 4AZSW18 4BASW18 4BBSW18 4BDSW18 4BESW18 4BFSW18 4BGSW18 4BHSW18 4BJSW18 4BNSW18 4BPSW18 4BQSW18 4BSSW18 4BTSW18 4BWSW18 4DASW18 4DBSW18 4DDSW18 4DFSW18 4DGSW18 4DHSW18 4DJSW18 4DLSW18 4DNSW18 4DPSW18 4DQSW18 4DRSW18 4DSSW18 4DTSW18 4DUSW18 4DWSW18 4DXSW18 4DYSW18 4EASW18 4EBSW18 4EDSW18 4EESW18 4EFSW18 4EGSW18 4EHSW18 4EJSW18 4ELSW18 4ENSW18 4EPSW18 4EQSW18 4ERSW18 4ESSW18 4ETSW18 4EUSW18 4EWSW18 4EXSW18 4EYSW18 4EZSW18 4FASW18 4FQSW18 4FRSW18 4FSSW18 4FTSW18 4FUSW18 4FWSW18 4FYSW18 4GASW18 4GBSW18 4GDSW18 4GESW18 4GFSW18 4GGSW18 4GHSW18 4GJSW18 4GLSW18 4GNSW18 4GPSW18 4GQSW18 4GRSW18 4GSSW18 4GTSW18 4GUSW18 4GWSW18 4GYSW18 4GZSW18 4HASW18 4HBSW18 4HDSW18 4HESW18 4HFSW18 4HGSW18 4HHSW18 4HJSW18 4HLSW18 4HNSW18 4HPSW18 4HQSW18 4HRSW18 4HTSW18 4HUSW18 4HWSW18 4HXSW18 4HYSW18 4HZSW18 4JASW18 4JBSW18 4JESW18 4JFSW18 4JGSW18 4JJSW18 4JPSW18 4JSSW18 4JTSW18 4JYSW18 4LASW18 4LBSW18 4LDSW18 4LHSW18 4LJSW18 4LLSW18 4LNSW18 4LPSW18 4LRSW18 4LSSW18 4LTSW18 4LUSW18 4LWSW18 4LXSW18 4LYSW18 4LZSW18 4NBSW18 4NJSW18 4NLSW18 4NNSW18 4NPSW18 4NRSW18 4NSSW18 4NTSW18 4NUSW18 4NWSW18 4NXSW18 4NYSW18 4NZSW18 4PASW18 4PBSW18 4PDSW18 4PFSW18 4PGSW18 4PJSW18 4PLSW18 4PNSW18 4PPSW18 4PQSW18 4PRSW18 4PSSW18 4PTSW18 4PUSW18 4PWSW18 4PXSW18 4PYSW18 4PZSW18 4QASW18 4QBSW18 4QDSW18 4QESW18 4QFSW18 4QGSW18 4QJSW18 4QLSW18 4QNSW18 4QPSW18 4QRSW18 4QSSW18 4QTSW18 4QWSW18 4QXSW18 4QZSW18 4RASW18 4RBSW18 4RDSW18 4RESW18 4RGSW18 4RHSW18 4RLSW18 4RNSW18 4RPSW18 4RQSW18 4RRSW18 4RSSW18 4RUSW18 4RWSW18 4RXSW18 4RYSW18 4RZSW18 4SASW18 4SBSW18 4SDSW18 4SFSW18 4SHSW18 4SJSW18 4SLSW18 4SNSW18 4SPSW18 4SQSW18 4SRSW18 4SSSW18 4STSW18 4SUSW18 4SWSW18 4SXSW18 4TESW18 4TFSW18 4TGSW18 4THSW18 4TPSW18 4TQSW18 4TRSW18 4TSSW18 4TTSW18 4TWSW18 4TXSW18 4TYSW18 4TZSW18 4UDSW18 4UESW18 4UHSW18 4UJSW18 4ULSW18 4UNSW18 4UPSW18 4URSW18 4UTSW18 4UWSW18 4XFSW18 4XGSW18 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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