SO18 3 postcode sector in the SO18 district

SO18 3 is a sector of the SO18 district: every postcode that starts SO18 3. It has 83 postcodes in use.

Not sure what a sector is? UK postcode format explained.

Every postcode in the SO18 3 sector, by flood risk

Map of every postcode in the SO18 3 sector, by flood risk Of the 83 postcodes in the SO18 3 sector that ONS places, 1 have a home or business at high risk, 2 are at low risk at worst and 80 are not on the Environment Agency's at-risk list. Places named: West End South, West End North. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. M27A27 SO18 3AE: not on the flood risk listSO18 3AF: not on the flood risk listSO18 3AG: not on the flood risk listSO18 3BW: not on the flood risk listSO18 3BX: not on the flood risk listSO18 3BY: not on the flood risk listSO18 3BZ: not on the flood risk listSO18 3DA: not on the flood risk listSO18 3DB: not on the flood risk listSO18 3DD: not on the flood risk listSO18 3DE: not on the flood risk listSO18 3DH: not on the flood risk listSO18 3HT: not on the flood risk listSO18 3HY: not on the flood risk listSO18 3JY: not on the flood risk listSO18 3JZ: not on the flood risk listSO18 3LB: not on the flood risk listSO18 3LD: not on the flood risk listSO18 3LE: not on the flood risk listSO18 3LF: not on the flood risk listSO18 3LH: not on the flood risk listSO18 3LJ: not on the flood risk listSO18 3LL: not on the flood risk listSO18 3LN: not on the flood risk listSO18 3LP: not on the flood risk listSO18 3LQ: not on the flood risk listSO18 3LR: not on the flood risk listSO18 3LS: not on the flood risk listSO18 3LW: not on the flood risk listSO18 3LX: not on the flood risk listSO18 3LY: not on the flood risk listSO18 3LZ: not on the flood risk listSO18 3NA: not on the flood risk listSO18 3NB: not on the flood risk listSO18 3ND: not on the flood risk listSO18 3NE: not on the flood risk listSO18 3NF: not on the flood risk listSO18 3NG: not on the flood risk listSO18 3NH: not on the flood risk listSO18 3NJ: not on the flood risk listSO18 3NL: not on the flood risk listSO18 3NP: not on the flood risk listSO18 3NQ: not on the flood risk listSO18 3NR: not on the flood risk listSO18 3NT: not on the flood risk listSO18 3NU: not on the flood risk listSO18 3PA: not on the flood risk listSO18 3PB: not on the flood risk listSO18 3PD: not on the flood risk listSO18 3PE: not on the flood risk listSO18 3PF: not on the flood risk listSO18 3PG: not on the flood risk listSO18 3PH: not on the flood risk listSO18 3PJ: not on the flood risk listSO18 3PN: not on the flood risk listSO18 3PP: not on the flood risk listSO18 3PQ: not on the flood risk listSO18 3PR: not on the flood risk listSO18 3PS: not on the flood risk listSO18 3PT: not on the flood risk listSO18 3PU: not on the flood risk listSO18 3PW: not on the flood risk listSO18 3QA: not on the flood risk listSO18 3QB: not on the flood risk listSO18 3QD: not on the flood risk listSO18 3QE: not on the flood risk listSO18 3QH: not on the flood risk listSO18 3QN: not on the flood risk listSO18 3QP: not on the flood risk listSO18 3QR: not on the flood risk listSO18 3QS: not on the flood risk listSO18 3QT: not on the flood risk listSO18 3QU: not on the flood risk listSO18 3QW: not on the flood risk listSO18 3QX: not on the flood risk listSO18 3RA: not on the flood risk listSO18 3RB: not on the flood risk listSO18 3RP: not on the flood risk listSO18 3RQ: not on the flood risk listSO18 3RR: not on the flood risk listSO18 3AD: low flood risk at worstSO18 3QL: low flood risk at worstSO18 3HW: high flood risk West End SouthWest End North Map of every postcode in the SO18 3 sector, by flood risk Of the 83 postcodes in the SO18 3 sector that ONS places, 1 have a home or business at high risk, 2 are at low risk at worst and 80 are not on the Environment Agency's at-risk list. Places named: West End South, West End North. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. M27 West End SouthWest End North
  • A home or business at high risk: 1
  • At medium risk at worst: 0
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 80

Of the 83 postcodes in the SO18 3 sector that ONS places, 1 have a home or business at high risk, 2 are at low risk at worst and 80 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. 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.

SO18 3HW7 at high risk

What do homes sell for in SO18 3?

Homes in SO18 3 sold for a typical £320,000 in the 12 months to August 2026, across 68 sales, up 10.3% on the 12 months before, HM Land Registry's figures show.

£320,000 typical price, the 12 months to August 2026
£290,000 12 months to August 2025
▲ up 10.3% on the 12 months before
  • Detached £490,000 25 sales
  • Semi-detached £320,000 12 sales
  • Terraced £240,000 25 sales
  • Flat or maisonette £182,500 6 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 SO18 3. 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 SO18 3

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.

SO18 3ADSO18 3AESO18 3AFSO18 3AGSO18 3BWSO18 3BXSO18 3BYSO18 3BZSO18 3DASO18 3DBSO18 3DDSO18 3DESO18 3DHSO18 3HTSO18 3HWSO18 3HYSO18 3JYSO18 3JZSO18 3LBSO18 3LDSO18 3LESO18 3LFSO18 3LHSO18 3LJSO18 3LLSO18 3LNSO18 3LPSO18 3LQSO18 3LRSO18 3LSSO18 3LWSO18 3LXSO18 3LYSO18 3LZSO18 3NASO18 3NBSO18 3NDSO18 3NESO18 3NFSO18 3NGSO18 3NHSO18 3NJSO18 3NLSO18 3NPSO18 3NQSO18 3NRSO18 3NTSO18 3NUSO18 3PASO18 3PBSO18 3PDSO18 3PESO18 3PFSO18 3PGSO18 3PHSO18 3PJSO18 3PNSO18 3PPSO18 3PQSO18 3PRSO18 3PSSO18 3PTSO18 3PUSO18 3PWSO18 3QASO18 3QBSO18 3QDSO18 3QESO18 3QHSO18 3QLSO18 3QNSO18 3QPSO18 3QRSO18 3QSSO18 3QTSO18 3QUSO18 3QWSO18 3QXSO18 3RASO18 3RBSO18 3RPSO18 3RQSO18 3RR

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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