SO23 9 postcode sector in the SO23 district

SO23 9 is a sector of the SO23 district: every postcode that starts SO23 9. It has 195 postcodes in use, 19 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 SO23 9 sector, by flood risk

Map of every postcode in the SO23 9 sector, by flood risk Of the 195 postcodes in the SO23 9 sector that ONS places, 11 have a home or business at high risk, 2 are at medium risk at worst, 9 are at low risk at worst and 173 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 11 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: Winchester. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. M3 SO23 9AA: not on the flood risk listSO23 9AD: not on the flood risk listSO23 9AE: not on the flood risk listSO23 9AF: not on the flood risk listSO23 9AH: not on the flood risk listSO23 9AP: not on the flood risk listSO23 9AS: not on the flood risk listSO23 9AU: not on the flood risk listSO23 9BL: not on the flood risk listSO23 9BN: not on the flood risk listSO23 9BQ: not on the flood risk listSO23 9BT: not on the flood risk listSO23 9BU: not on the flood risk listSO23 9BW: not on the flood risk listSO23 9BX: not on the flood risk listSO23 9DA: not on the flood risk listSO23 9DB: not on the flood risk listSO23 9DF: not on the flood risk listSO23 9DH: not on the flood risk listSO23 9DR: not on the flood risk listSO23 9DW: not on the flood risk listSO23 9DY: not on the flood risk listSO23 9DZ: not on the flood risk listSO23 9EB: not on the flood risk listSO23 9ED: not on the flood risk listSO23 9EF: not on the flood risk listSO23 9EG: not on the flood risk listSO23 9EH: not on the flood risk listSO23 9EL: not on the flood risk listSO23 9EN: not on the flood risk listSO23 9EP: not on the flood risk listSO23 9EQ: not on the flood risk listSO23 9ES: not on the flood risk listSO23 9EX: not on the flood risk listSO23 9GN: not on the flood risk listSO23 9GZ: not on the flood risk listSO23 9HA: not on the flood risk listSO23 9HB: not on the flood risk listSO23 9HE: not on the flood risk listSO23 9HF: not on the flood risk listSO23 9HG: not on the flood risk listSO23 9HH: not on the flood risk listSO23 9HJ: not on the flood risk listSO23 9HL: not on the flood risk listSO23 9HN: not on the flood risk listSO23 9HP: not on the flood risk listSO23 9HQ: not on the flood risk listSO23 9HT: not on the flood risk listSO23 9HU: not on the flood risk listSO23 9HW: not on the flood risk listSO23 9HX: not on the flood risk listSO23 9JA: not on the flood risk listSO23 9JB: not on the flood risk listSO23 9JD: not on the flood risk listSO23 9JE: not on the flood risk listSO23 9JF: not on the flood risk listSO23 9JG: not on the flood risk listSO23 9JJ: not on the flood risk listSO23 9JL: not on the flood risk listSO23 9JP: not on the flood risk listSO23 9JQ: not on the flood risk listSO23 9JR: not on the flood risk listSO23 9JS: not on the flood risk listSO23 9JT: not on the flood risk listSO23 9JU: not on the flood risk listSO23 9JW: not on the flood risk listSO23 9LD: not on the flood risk listSO23 9LE: not on the flood risk listSO23 9LF: not on the flood risk listSO23 9LJ: not on the flood risk listSO23 9LP: not on the flood risk listSO23 9LQ: not on the flood risk listSO23 9LS: not on the flood risk listSO23 9LX: not on the flood risk listSO23 9LY: not on the flood risk listSO23 9NB: not on the flood risk listSO23 9ND: not on the flood risk listSO23 9NE: not on the flood risk listSO23 9NF: not on the flood risk listSO23 9NL: not on the flood risk listSO23 9NN: not on the flood risk listSO23 9NP: not on the flood risk listSO23 9NQ: not on the flood risk listSO23 9NR: not on the flood risk listSO23 9NS: not on the flood risk listSO23 9NT: not on the flood risk listSO23 9NU: not on the flood risk listSO23 9PA: not on the flood risk listSO23 9PD: not on the flood risk listSO23 9PE: not on the flood risk listSO23 9PF: not on the flood risk listSO23 9PG: not on the flood risk listSO23 9PH: not on the flood risk listSO23 9PL: not on the flood risk listSO23 9PP: not on the flood risk listSO23 9PQ: not on the flood risk listSO23 9PR: not on the flood risk listSO23 9PS: not on the flood risk listSO23 9PU: not on the flood risk listSO23 9PW: not on the flood risk listSO23 9PX: not on the flood risk listSO23 9PZ: not on the flood risk listSO23 9QA: not on the flood risk listSO23 9QB: not on the flood risk listSO23 9QD: not on the flood risk listSO23 9QE: not on the flood risk listSO23 9QF: not on the flood risk listSO23 9QH: not on the flood risk listSO23 9QP: not on the flood risk listSO23 9QQ: not on the flood risk listSO23 9QR: not on the flood risk listSO23 9QU: not on the flood risk listSO23 9QX: not on the flood risk listSO23 9QY: not on the flood risk listSO23 9QZ: not on the flood risk listSO23 9RA: not on the flood risk listSO23 9RB: not on the flood risk listSO23 9RD: not on the flood risk listSO23 9RE: not on the flood risk listSO23 9RF: not on the flood risk listSO23 9RG: not on the flood risk listSO23 9RH: not on the flood risk listSO23 9RJ: not on the flood risk listSO23 9RQ: not on the flood risk listSO23 9RS: not on the flood risk listSO23 9RT: not on the flood risk listSO23 9RX: not on the flood risk listSO23 9SA: not on the flood risk listSO23 9SB: not on the flood risk listSO23 9SD: not on the flood risk listSO23 9SE: not on the flood risk listSO23 9SF: not on the flood risk listSO23 9SG: not on the flood risk listSO23 9SH: not on the flood risk listSO23 9SJ: not on the flood risk listSO23 9SL: not on the flood risk listSO23 9SN: not on the flood risk listSO23 9SP: not on the flood risk listSO23 9SQ: not on the flood risk listSO23 9SR: not on the flood risk listSO23 9SS: not on the flood risk listSO23 9ST: not on the flood risk listSO23 9SU: not on the flood risk listSO23 9SW: not on the flood risk listSO23 9SX: not on the flood risk listSO23 9SY: not on the flood risk listSO23 9TA: not on the flood risk listSO23 9TD: not on the flood risk listSO23 9TE: not on the flood risk listSO23 9TG: not on the flood risk listSO23 9TH: not on the flood risk listSO23 9TJ: not on the flood risk listSO23 9TL: not on the flood risk listSO23 9TN: not on the flood risk listSO23 9TP: not on the flood risk listSO23 9TR: not on the flood risk listSO23 9TS: not on the flood risk listSO23 9TT: not on the flood risk listSO23 9TU: not on the flood risk listSO23 9TW: not on the flood risk listSO23 9TY: not on the flood risk listSO23 9TZ: not on the flood risk listSO23 9WW: not on the flood risk listSO23 9YQ: not on the flood risk listSO23 9AX: low flood risk at worstSO23 9BE: low flood risk at worstSO23 9GH: low flood risk at worstSO23 9LL: low flood risk at worstSO23 9LR: low flood risk at worstSO23 9LT: low flood risk at worstSO23 9NA: low flood risk at worstSO23 9NX: low flood risk at worstSO23 9QG: low flood risk at worstSO23 9AZ: medium flood risk at worstSO23 9BH: medium flood risk at worstSO23 9AL: high flood riskSO23 9AY: high flood riskSO23 9BA: high flood riskSO23 9BD: high flood riskSO23 9BG: high flood riskSO23 9JX: high flood riskSO23 9LG: high flood riskSO23 9LH: high flood riskSO23 9LN: high flood riskSO23 9NG: high flood riskSO23 9RU: high flood risk Winchester 11 postcodes at high or medium risk, outlined: this goes to SO23 9BA, the one with most homes and businesses at high risk11 postcodes at high or medium risk Map of every postcode in the SO23 9 sector, by flood risk Of the 195 postcodes in the SO23 9 sector that ONS places, 11 have a home or business at high risk, 2 are at medium risk at worst, 9 are at low risk at worst and 173 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 11 postcodes at high or medium risk. One postcode lies beyond the edge and is listed under the map. Places named: Winchester. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. M3 Winchester
  • A home or business at high risk: 11
  • At medium risk at worst: 2
  • At low risk at worst: 9
  • At very low risk only: 0
  • Not on the at-risk list: 173
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 195 postcodes in the SO23 9 sector that ONS places, 11 have a home or business at high risk, 2 are at medium risk at worst, 9 are at low risk at worst and 173 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

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

SO23 9BA18 at high riskSO23 9AY15 at high riskSO23 9LG10 at high riskSO23 9LH8 at high riskSO23 9JX7 at high riskSO23 9RU3 at high riskSO23 9BG2 at high riskSO23 9NG2 at high riskSO23 9LN1 at high riskSO23 9AL1 at high riskSO23 9BD1 at high risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

SO23 9RZ

Where the postcodes at high or medium risk lie together

  • 11 postcodes at high or medium risk, outlined on the map. SO23 9BA, is the one with most homes and businesses at high risk.

What do homes sell for in SO23 9?

Homes in SO23 9 sold for a typical £659,900 in the 12 months to August 2026, across 55 sales, up 6.4% on the 12 months before, HM Land Registry's figures show.

£659,900 typical price, the 12 months to August 2026
£620,000 12 months to August 2025
▲ up 6.4% on the 12 months before
  • Detached £1,210,000 11 sales
  • Semi-detached £920,000 9 sales
  • Terraced £677,500 20 sales
  • Flat or maisonette £311,500 15 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 SO23 9. 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 SO23 9

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.

SO23 9AASO23 9ADSO23 9AESO23 9AFSO23 9AHSO23 9AJSO23 9ALSO23 9APSO23 9ASSO23 9AUSO23 9AXSO23 9AYSO23 9AZSO23 9BASO23 9BDSO23 9BESO23 9BGSO23 9BHSO23 9BLSO23 9BNSO23 9BQSO23 9BTSO23 9BUSO23 9BWSO23 9BXSO23 9BZSO23 9DASO23 9DBSO23 9DFSO23 9DHSO23 9DRSO23 9DTSO23 9DWSO23 9DYSO23 9DZSO23 9EBSO23 9EDSO23 9EFSO23 9EGSO23 9EHSO23 9ELSO23 9ENSO23 9EPSO23 9EQSO23 9ESSO23 9EXSO23 9GHSO23 9GNSO23 9GZSO23 9HASO23 9HBSO23 9HESO23 9HFSO23 9HGSO23 9HHSO23 9HJSO23 9HLSO23 9HNSO23 9HPSO23 9HQSO23 9HRSO23 9HTSO23 9HUSO23 9HWSO23 9HXSO23 9JASO23 9JBSO23 9JDSO23 9JESO23 9JFSO23 9JGSO23 9JJSO23 9JLSO23 9JNSO23 9JPSO23 9JQSO23 9JRSO23 9JSSO23 9JTSO23 9JUSO23 9JWSO23 9JXSO23 9LDSO23 9LESO23 9LFSO23 9LGSO23 9LHSO23 9LJSO23 9LLSO23 9LNSO23 9LPSO23 9LQSO23 9LRSO23 9LSSO23 9LTSO23 9LXSO23 9LYSO23 9LZSO23 9NASO23 9NBSO23 9NDSO23 9NESO23 9NFSO23 9NGSO23 9NJSO23 9NLSO23 9NNSO23 9NPSO23 9NQSO23 9NRSO23 9NSSO23 9NTSO23 9NUSO23 9NXSO23 9PASO23 9PDSO23 9PESO23 9PFSO23 9PGSO23 9PHSO23 9PLSO23 9PPSO23 9PQSO23 9PRSO23 9PSSO23 9PUSO23 9PWSO23 9PXSO23 9PZSO23 9QASO23 9QBSO23 9QDSO23 9QESO23 9QFSO23 9QGSO23 9QHSO23 9QPSO23 9QQSO23 9QRSO23 9QUSO23 9QXSO23 9QYSO23 9QZSO23 9RASO23 9RBSO23 9RDSO23 9RESO23 9RFSO23 9RGSO23 9RHSO23 9RJSO23 9RQSO23 9RSSO23 9RTSO23 9RUSO23 9RXSO23 9RZSO23 9SASO23 9SBSO23 9SDSO23 9SESO23 9SFSO23 9SGSO23 9SHSO23 9SJSO23 9SLSO23 9SNSO23 9SPSO23 9SQSO23 9SRSO23 9SSSO23 9STSO23 9SUSO23 9SWSO23 9SXSO23 9SYSO23 9TASO23 9TDSO23 9TESO23 9TGSO23 9THSO23 9TJSO23 9TLSO23 9TNSO23 9TPSO23 9TRSO23 9TSSO23 9TTSO23 9TUSO23 9TWSO23 9TYSO23 9TZSO23 9WWSO23 9YQSO23 9ZX

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.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.