SO15 4 postcode sector in the SO15 district

SO15 4 is a sector of the SO15 district: every postcode that starts SO15 4. It has 73 postcodes in use.

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

Every postcode in the SO15 4 sector, by flood risk

Map of every postcode in the SO15 4 sector, by flood risk Of the 73 postcodes in the SO15 4 sector that ONS places, 8 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 62 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. Places named: Millbrook. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A35A33 SO15 4AE: not on the flood risk listSO15 4AF: not on the flood risk listSO15 4AG: not on the flood risk listSO15 4AH: not on the flood risk listSO15 4GP: not on the flood risk listSO15 4GQ: not on the flood risk listSO15 4GR: not on the flood risk listSO15 4GS: not on the flood risk listSO15 4GT: not on the flood risk listSO15 4GU: not on the flood risk listSO15 4GW: not on the flood risk listSO15 4GX: not on the flood risk listSO15 4GY: not on the flood risk listSO15 4GZ: not on the flood risk listSO15 4HA: not on the flood risk listSO15 4HB: not on the flood risk listSO15 4HD: not on the flood risk listSO15 4HE: not on the flood risk listSO15 4HF: not on the flood risk listSO15 4HG: not on the flood risk listSO15 4HH: not on the flood risk listSO15 4HJ: not on the flood risk listSO15 4HL: not on the flood risk listSO15 4HN: not on the flood risk listSO15 4HP: not on the flood risk listSO15 4HQ: not on the flood risk listSO15 4HR: not on the flood risk listSO15 4HS: not on the flood risk listSO15 4HT: not on the flood risk listSO15 4HU: not on the flood risk listSO15 4HW: not on the flood risk listSO15 4JA: not on the flood risk listSO15 4JB: not on the flood risk listSO15 4JD: not on the flood risk listSO15 4JE: not on the flood risk listSO15 4JF: not on the flood risk listSO15 4JG: not on the flood risk listSO15 4JH: not on the flood risk listSO15 4JQ: not on the flood risk listSO15 4JR: not on the flood risk listSO15 4JS: not on the flood risk listSO15 4JT: not on the flood risk listSO15 4JU: not on the flood risk listSO15 4JW: not on the flood risk listSO15 4JX: not on the flood risk listSO15 4JY: not on the flood risk listSO15 4JZ: not on the flood risk listSO15 4LA: not on the flood risk listSO15 4LB: not on the flood risk listSO15 4LD: not on the flood risk listSO15 4LF: not on the flood risk listSO15 4LG: not on the flood risk listSO15 4LR: not on the flood risk listSO15 4LS: not on the flood risk listSO15 4LT: not on the flood risk listSO15 4LU: not on the flood risk listSO15 4LW: not on the flood risk listSO15 4LX: not on the flood risk listSO15 4PD: not on the flood risk listSO15 4PE: not on the flood risk listSO15 4PF: not on the flood risk listSO15 4PJ: not on the flood risk listSO15 4LE: low flood risk at worstSO15 4PB: low flood risk at worstSO15 4PG: medium flood risk at worstSO15 4HX: high flood riskSO15 4HY: high flood riskSO15 4HZ: high flood riskSO15 4JJ: high flood riskSO15 4JL: high flood riskSO15 4JN: high flood riskSO15 4JP: high flood riskSO15 4PH: high flood risk Millbrook 9 postcodes at high or medium risk, outlined: this goes to SO15 4JJ, the one with most homes and businesses at high risk9 postcodes at high or medium risk Map of every postcode in the SO15 4 sector, by flood risk Of the 73 postcodes in the SO15 4 sector that ONS places, 8 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 62 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. Places named: Millbrook. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A33 Millbrook
  • A home or business at high risk: 8
  • At medium risk at worst: 1
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 62
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 73 postcodes in the SO15 4 sector that ONS places, 8 have a home or business at high risk, 1 are at medium risk at worst, 2 are at low risk at worst and 62 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.

SO15 4JJ11 at high riskSO15 4JN6 at high riskSO15 4HY6 at high riskSO15 4JP5 at high riskSO15 4JL4 at high riskSO15 4HZ3 at high riskSO15 4PH1 at high riskSO15 4HX1 at high risk

Where the postcodes at high or medium risk lie together

  • 9 postcodes at high or medium risk, outlined on the map. SO15 4JJ, is the one with most homes and businesses at high risk.

What do homes sell for in SO15 4?

Homes in SO15 4 sold for a typical £343,500 in the 12 months to August 2026, across 38 sales, up 2.4% on the 12 months before, HM Land Registry's figures show.

£343,500 typical price, the 12 months to August 2026
£335,500 12 months to August 2025
▲ up 2.4% on the 12 months before
  • Detached 2 sales, too few to price
  • Semi-detached £352,500 29 sales
  • Terraced £285,000 6 sales
  • Flat or maisonette 1 sale, too few to price

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 SO15 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 SO15 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.

SO15 4AESO15 4AFSO15 4AGSO15 4AHSO15 4GPSO15 4GQSO15 4GRSO15 4GSSO15 4GTSO15 4GUSO15 4GWSO15 4GXSO15 4GYSO15 4GZSO15 4HASO15 4HBSO15 4HDSO15 4HESO15 4HFSO15 4HGSO15 4HHSO15 4HJSO15 4HLSO15 4HNSO15 4HPSO15 4HQSO15 4HRSO15 4HSSO15 4HTSO15 4HUSO15 4HWSO15 4HXSO15 4HYSO15 4HZSO15 4JASO15 4JBSO15 4JDSO15 4JESO15 4JFSO15 4JGSO15 4JHSO15 4JJSO15 4JLSO15 4JNSO15 4JPSO15 4JQSO15 4JRSO15 4JSSO15 4JTSO15 4JUSO15 4JWSO15 4JXSO15 4JYSO15 4JZSO15 4LASO15 4LBSO15 4LDSO15 4LESO15 4LFSO15 4LGSO15 4LRSO15 4LSSO15 4LTSO15 4LUSO15 4LWSO15 4LXSO15 4PBSO15 4PDSO15 4PESO15 4PFSO15 4PGSO15 4PHSO15 4PJ

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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