SO51 8 postcode sector in the SO51 district

SO51 8 is a sector of the SO51 district: every postcode that starts SO51 8. It has 179 postcodes in use, 16 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 SO51 8 sector, by flood risk

Map of every postcode in the SO51 8 sector, by flood risk Of the 179 postcodes in the SO51 8 sector that ONS places, 24 have a home or business at high risk, 11 are at medium risk at worst, 13 are at low risk at worst, 1 are at very low risk only and 130 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 19 postcodes at high or medium risk; 8 postcodes at high or medium risk. Places named: Romsey. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. SO51 8AG: not on the flood risk listSO51 8AH: not on the flood risk listSO51 8AL: not on the flood risk listSO51 8AN: not on the flood risk listSO51 8AP: not on the flood risk listSO51 8AQ: not on the flood risk listSO51 8AS: not on the flood risk listSO51 8BF: not on the flood risk listSO51 8BR: not on the flood risk listSO51 8BS: not on the flood risk listSO51 8BT: not on the flood risk listSO51 8BU: not on the flood risk listSO51 8BW: not on the flood risk listSO51 8DA: not on the flood risk listSO51 8DB: not on the flood risk listSO51 8DD: not on the flood risk listSO51 8DE: not on the flood risk listSO51 8DF: not on the flood risk listSO51 8DG: not on the flood risk listSO51 8DH: not on the flood risk listSO51 8DJ: not on the flood risk listSO51 8DL: not on the flood risk listSO51 8DN: not on the flood risk listSO51 8DP: not on the flood risk listSO51 8DQ: not on the flood risk listSO51 8DR: not on the flood risk listSO51 8DS: not on the flood risk listSO51 8DT: not on the flood risk listSO51 8DU: not on the flood risk listSO51 8DW: not on the flood risk listSO51 8DX: not on the flood risk listSO51 8DZ: not on the flood risk listSO51 8EA: not on the flood risk listSO51 8EB: not on the flood risk listSO51 8ED: not on the flood risk listSO51 8EE: not on the flood risk listSO51 8EF: not on the flood risk listSO51 8EH: not on the flood risk listSO51 8EJ: not on the flood risk listSO51 8EL: not on the flood risk listSO51 8EN: not on the flood risk listSO51 8EP: not on the flood risk listSO51 8ET: not on the flood risk listSO51 8EU: not on the flood risk listSO51 8EW: not on the flood risk listSO51 8EX: not on the flood risk listSO51 8EY: not on the flood risk listSO51 8EZ: not on the flood risk listSO51 8FB: not on the flood risk listSO51 8FD: not on the flood risk listSO51 8FE: not on the flood risk listSO51 8FF: not on the flood risk listSO51 8FG: not on the flood risk listSO51 8FJ: not on the flood risk listSO51 8FL: not on the flood risk listSO51 8FN: not on the flood risk listSO51 8FP: not on the flood risk listSO51 8FQ: not on the flood risk listSO51 8FR: not on the flood risk listSO51 8FS: not on the flood risk listSO51 8FT: not on the flood risk listSO51 8FU: not on the flood risk listSO51 8FW: not on the flood risk listSO51 8FX: not on the flood risk listSO51 8FY: not on the flood risk listSO51 8FZ: not on the flood risk listSO51 8GA: not on the flood risk listSO51 8GB: not on the flood risk listSO51 8GJ: not on the flood risk listSO51 8GL: not on the flood risk listSO51 8GN: not on the flood risk listSO51 8GR: not on the flood risk listSO51 8GS: not on the flood risk listSO51 8GT: not on the flood risk listSO51 8GW: not on the flood risk listSO51 8GY: not on the flood risk listSO51 8GZ: not on the flood risk listSO51 8HA: not on the flood risk listSO51 8HS: not on the flood risk listSO51 8HU: not on the flood risk listSO51 8HY: not on the flood risk listSO51 8JG: not on the flood risk listSO51 8JH: not on the flood risk listSO51 8JJ: not on the flood risk listSO51 8JN: not on the flood risk listSO51 8JQ: not on the flood risk listSO51 8JR: not on the flood risk listSO51 8JS: not on the flood risk listSO51 8JT: not on the flood risk listSO51 8JU: not on the flood risk listSO51 8JW: not on the flood risk listSO51 8JX: not on the flood risk listSO51 8JY: not on the flood risk listSO51 8JZ: not on the flood risk listSO51 8LA: not on the flood risk listSO51 8LB: not on the flood risk listSO51 8LD: not on the flood risk listSO51 8LE: not on the flood risk listSO51 8LF: not on the flood risk listSO51 8LH: not on the flood risk listSO51 8LL: not on the flood risk listSO51 8LN: not on the flood risk listSO51 8LQ: not on the flood risk listSO51 8LR: not on the flood risk listSO51 8NA: not on the flood risk listSO51 8NB: not on the flood risk listSO51 8NE: not on the flood risk listSO51 8NG: not on the flood risk listSO51 8PA: not on the flood risk listSO51 8PB: not on the flood risk listSO51 8PJ: not on the flood risk listSO51 8PN: not on the flood risk listSO51 8QQ: not on the flood risk listSO51 8TA: not on the flood risk listSO51 8TB: not on the flood risk listSO51 8TD: not on the flood risk listSO51 8UG: not on the flood risk listSO51 8WH: not on the flood risk listSO51 8XF: not on the flood risk listSO51 8YB: not on the flood risk listSO51 8YF: not on the flood risk listSO51 8YS: not on the flood risk listSO51 8YZ: not on the flood risk listSO51 8ZB: not on the flood risk listSO51 8ZE: not on the flood risk listSO51 8ZH: not on the flood risk listSO51 8GU: very low flood risk onlySO51 8AE: low flood risk at worstSO51 8DY: low flood risk at worstSO51 8FH: low flood risk at worstSO51 8GD: low flood risk at worstSO51 8GP: low flood risk at worstSO51 8GX: low flood risk at worstSO51 8HB: low flood risk at worstSO51 8HD: low flood risk at worstSO51 8HJ: low flood risk at worstSO51 8HN: low flood risk at worstSO51 8HQ: low flood risk at worstSO51 8HR: low flood risk at worstSO51 8HT: low flood risk at worstSO51 8AD: medium flood risk at worstSO51 8AF: medium flood risk at worstSO51 8GH: medium flood risk at worstSO51 8HE: medium flood risk at worstSO51 8HG: medium flood risk at worstSO51 8HH: medium flood risk at worstSO51 8HL: medium flood risk at worstSO51 8HP: medium flood risk at worstSO51 8LG: medium flood risk at worstSO51 8LJ: medium flood risk at worstSO51 8QL: medium flood risk at worstSO51 8AA: high flood riskSO51 8AB: high flood riskSO51 8AJ: high flood riskSO51 8BX: high flood riskSO51 8BY: high flood riskSO51 8BZ: high flood riskSO51 8EQ: high flood riskSO51 8ER: high flood riskSO51 8ES: high flood riskSO51 8GE: high flood riskSO51 8GF: high flood riskSO51 8GG: high flood riskSO51 8GQ: high flood riskSO51 8HF: high flood riskSO51 8JA: high flood riskSO51 8JB: high flood riskSO51 8JD: high flood riskSO51 8JE: high flood riskSO51 8JF: high flood riskSO51 8JL: high flood riskSO51 8LZ: high flood riskSO51 8PD: high flood riskSO51 8PE: high flood riskSO51 8WJ: high flood risk Romsey 19 postcodes at high or medium risk, outlined: this goes to SO51 8JA, the one with most homes and businesses at high risk19 postcodes at high or medium risk8 postcodes at high or medium risk, outlined: this goes to SO51 8LZ, the one with most homes and businesses at high risk8 postcodes at high or medium risk Map of every postcode in the SO51 8 sector, by flood risk Of the 179 postcodes in the SO51 8 sector that ONS places, 24 have a home or business at high risk, 11 are at medium risk at worst, 13 are at low risk at worst, 1 are at very low risk only and 130 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 19 postcodes at high or medium risk; 8 postcodes at high or medium risk. Places named: Romsey. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A27 Romsey
  • A home or business at high risk: 24
  • At medium risk at worst: 11
  • At low risk at worst: 13
  • At very low risk only: 1
  • Not on the at-risk list: 130
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 179 postcodes in the SO51 8 sector that ONS places, 24 have a home or business at high risk, 11 are at medium risk at worst, 13 are at low risk at worst, 1 are at very low risk only and 130 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.

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

24 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.

SO51 8LZ35 at high riskSO51 8JA22 at high riskSO51 8JD16 at high riskSO51 8JB15 at high riskSO51 8BZ13 at high riskSO51 8AA11 at high riskSO51 8GG10 at high riskSO51 8WJ7 at high riskSO51 8JF5 at high riskSO51 8AB5 at high riskSO51 8BX5 at high riskSO51 8GE4 at high risk

Where the postcodes at high or medium risk lie together

  • 19 postcodes at high or medium risk, outlined on the map. SO51 8JA, is the one with most homes and businesses at high risk.
  • 8 postcodes at high or medium risk, outlined on the map. SO51 8LZ, is the one with most homes and businesses at high risk.

What do homes sell for in SO51 8?

Homes in SO51 8 sold for a typical £360,000 in the 12 months to August 2026, across 87 sales, down 4.9% on the 12 months before, HM Land Registry's figures show.

£360,000 typical price, the 12 months to August 2026
£378,500 12 months to August 2025
▼ down 4.9% on the 12 months before
  • Detached £730,000 12 sales
  • Semi-detached £500,000 9 sales
  • Terraced £400,000 35 sales
  • Flat or maisonette £205,000 31 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 SO51 8. 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 SO51 8

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.

SO51 8AASO51 8ABSO51 8ADSO51 8AESO51 8AFSO51 8AGSO51 8AHSO51 8AJSO51 8ALSO51 8ANSO51 8APSO51 8AQSO51 8ASSO51 8BFSO51 8BRSO51 8BSSO51 8BTSO51 8BUSO51 8BWSO51 8BXSO51 8BYSO51 8BZSO51 8DASO51 8DBSO51 8DDSO51 8DESO51 8DFSO51 8DGSO51 8DHSO51 8DJSO51 8DLSO51 8DNSO51 8DPSO51 8DQSO51 8DRSO51 8DSSO51 8DTSO51 8DUSO51 8DWSO51 8DXSO51 8DYSO51 8DZSO51 8EASO51 8EBSO51 8EDSO51 8EESO51 8EFSO51 8EHSO51 8EJSO51 8ELSO51 8ENSO51 8EPSO51 8EQSO51 8ERSO51 8ESSO51 8ETSO51 8EUSO51 8EWSO51 8EXSO51 8EYSO51 8EZSO51 8FBSO51 8FDSO51 8FESO51 8FFSO51 8FGSO51 8FHSO51 8FJSO51 8FLSO51 8FNSO51 8FPSO51 8FQSO51 8FRSO51 8FSSO51 8FTSO51 8FUSO51 8FWSO51 8FXSO51 8FYSO51 8FZSO51 8GASO51 8GBSO51 8GDSO51 8GESO51 8GFSO51 8GGSO51 8GHSO51 8GJSO51 8GLSO51 8GNSO51 8GPSO51 8GQSO51 8GRSO51 8GSSO51 8GTSO51 8GUSO51 8GWSO51 8GXSO51 8GYSO51 8GZSO51 8HASO51 8HBSO51 8HDSO51 8HESO51 8HFSO51 8HGSO51 8HHSO51 8HJSO51 8HLSO51 8HNSO51 8HPSO51 8HQSO51 8HRSO51 8HSSO51 8HTSO51 8HUSO51 8HYSO51 8JASO51 8JBSO51 8JDSO51 8JESO51 8JFSO51 8JGSO51 8JHSO51 8JJSO51 8JLSO51 8JNSO51 8JQSO51 8JRSO51 8JSSO51 8JTSO51 8JUSO51 8JWSO51 8JXSO51 8JYSO51 8JZSO51 8LASO51 8LBSO51 8LDSO51 8LESO51 8LFSO51 8LGSO51 8LHSO51 8LJSO51 8LLSO51 8LNSO51 8LQSO51 8LRSO51 8LZSO51 8NASO51 8NBSO51 8NESO51 8NGSO51 8PASO51 8PBSO51 8PDSO51 8PESO51 8PJSO51 8PNSO51 8QLSO51 8QQSO51 8TASO51 8TBSO51 8TDSO51 8UGSO51 8WASO51 8WHSO51 8WJSO51 8XASO51 8XFSO51 8YBSO51 8YFSO51 8YSSO51 8YZSO51 8ZBSO51 8ZESO51 8ZHSO51 8ZJSO51 8ZN

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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