SO31 1 postcode sector in the SO31 district

SO31 1 is a sector of the SO31 district: every postcode that starts SO31 1. It has 74 postcodes in use, one of them a large-user postcode. 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 SO31 1 sector, by flood risk

Map of every postcode in the SO31 1 sector, by flood risk Of the 74 postcodes in the SO31 1 sector that ONS places, 3 have a home or business at high risk and 71 are not on the Environment Agency's at-risk list. Places named: Park Gate, Sarisbury & Whiteley. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. M27A27 SO31 1AB: not on the flood risk listSO31 1AD: not on the flood risk listSO31 1AE: not on the flood risk listSO31 1AH: not on the flood risk listSO31 1AJ: not on the flood risk listSO31 1AP: not on the flood risk listSO31 1AQ: not on the flood risk listSO31 1AR: not on the flood risk listSO31 1AY: not on the flood risk listSO31 1AZ: not on the flood risk listSO31 1BA: not on the flood risk listSO31 1BB: not on the flood risk listSO31 1BD: not on the flood risk listSO31 1BE: not on the flood risk listSO31 1BG: not on the flood risk listSO31 1BH: not on the flood risk listSO31 1BJ: not on the flood risk listSO31 1BL: not on the flood risk listSO31 1BN: not on the flood risk listSO31 1BP: not on the flood risk listSO31 1BQ: not on the flood risk listSO31 1BR: not on the flood risk listSO31 1BS: not on the flood risk listSO31 1BT: not on the flood risk listSO31 1BU: not on the flood risk listSO31 1BW: not on the flood risk listSO31 1BX: not on the flood risk listSO31 1BY: not on the flood risk listSO31 1BZ: not on the flood risk listSO31 1DA: not on the flood risk listSO31 1DB: not on the flood risk listSO31 1DD: not on the flood risk listSO31 1DG: not on the flood risk listSO31 1DH: not on the flood risk listSO31 1DJ: not on the flood risk listSO31 1DL: not on the flood risk listSO31 1DN: not on the flood risk listSO31 1DP: not on the flood risk listSO31 1DQ: not on the flood risk listSO31 1DR: not on the flood risk listSO31 1DS: not on the flood risk listSO31 1DT: not on the flood risk listSO31 1DU: not on the flood risk listSO31 1DW: not on the flood risk listSO31 1DX: not on the flood risk listSO31 1DY: not on the flood risk listSO31 1DZ: not on the flood risk listSO31 1EA: not on the flood risk listSO31 1EB: not on the flood risk listSO31 1ED: not on the flood risk listSO31 1EE: not on the flood risk listSO31 1EG: not on the flood risk listSO31 1EP: not on the flood risk listSO31 1ER: not on the flood risk listSO31 1ES: not on the flood risk listSO31 1ET: not on the flood risk listSO31 1EU: not on the flood risk listSO31 1EW: not on the flood risk listSO31 1EX: not on the flood risk listSO31 1EY: not on the flood risk listSO31 1EZ: not on the flood risk listSO31 1FB: not on the flood risk listSO31 1FD: not on the flood risk listSO31 1FF: not on the flood risk listSO31 1FG: not on the flood risk listSO31 1FQ: not on the flood risk listSO31 1FW: not on the flood risk listSO31 1ZJ: not on the flood risk listSO31 1ZS: not on the flood risk listSO31 1ZT: not on the flood risk listSO31 1AA: high flood riskSO31 1FA: high flood riskSO31 1ZL: high flood risk Park GateSarisbury & Whiteley Map of every postcode in the SO31 1 sector, by flood risk Of the 74 postcodes in the SO31 1 sector that ONS places, 3 have a home or business at high risk and 71 are not on the Environment Agency's at-risk list. Places named: Park Gate, Sarisbury & Whiteley. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M27 Park GateSarisbury & Whiteley
  • A home or business at high risk: 3
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 71

Of the 74 postcodes in the SO31 1 sector that ONS places, 3 have a home or business at high risk and 71 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

The postcodes at high risk

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

SO31 1ZL40 at high riskSO31 1FA15 at high riskSO31 1AA13 at high risk

What do homes sell for in SO31 1?

Homes in SO31 1 sold for a typical £430,000 in the 12 months to August 2026, across 43 sales, up 16.2% on the 12 months before, HM Land Registry's figures show.

£430,000 typical price, the 12 months to August 2026
£369,950 12 months to August 2025
▲ up 16.2% on the 12 months before
  • Detached £622,500 24 sales
  • Semi-detached £335,000 9 sales
  • Terraced 2 sales, too few to price
  • Flat or maisonette £202,500 8 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 SO31 1. 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 SO31 1

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.

SO31 1AASO31 1ABSO31 1ADSO31 1AESO31 1AHSO31 1AJSO31 1APSO31 1AQSO31 1ARSO31 1AYSO31 1AZSO31 1BASO31 1BBSO31 1BDSO31 1BESO31 1BGSO31 1BHSO31 1BJSO31 1BLSO31 1BNSO31 1BPSO31 1BQSO31 1BRSO31 1BSSO31 1BTSO31 1BUSO31 1BWSO31 1BXSO31 1BYSO31 1BZSO31 1DASO31 1DBSO31 1DDSO31 1DESO31 1DGSO31 1DHSO31 1DJSO31 1DLSO31 1DNSO31 1DPSO31 1DQSO31 1DRSO31 1DSSO31 1DTSO31 1DUSO31 1DWSO31 1DXSO31 1DYSO31 1DZSO31 1EASO31 1EBSO31 1EDSO31 1EESO31 1EGSO31 1EPSO31 1ERSO31 1ESSO31 1ETSO31 1EUSO31 1EWSO31 1EXSO31 1EYSO31 1EZSO31 1FASO31 1FBSO31 1FDSO31 1FFSO31 1FGSO31 1FQSO31 1FWSO31 1ZJSO31 1ZLSO31 1ZSSO31 1ZT

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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