SO21 1 postcode sector in the SO21 district

SO21 1 is a sector of the SO21 district: every postcode that starts SO21 1. It has 299 postcodes in use, 4 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 SO21 1 sector, by flood risk

Map of every postcode in the SO21 1 sector, by flood risk Of the 299 postcodes in the SO21 1 sector that ONS places, 9 have a home or business at high risk, 3 are at low risk at worst, 5 are at very low risk only and 282 are not on the Environment Agency's at-risk list. Places named: Winchester, Kings Worthy, Colden Common, Twyford, Winchester. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A272A31M3 SO21 1AA: not on the flood risk listSO21 1AB: not on the flood risk listSO21 1AD: not on the flood risk listSO21 1AE: not on the flood risk listSO21 1AF: not on the flood risk listSO21 1AG: not on the flood risk listSO21 1AH: not on the flood risk listSO21 1AJ: not on the flood risk listSO21 1AL: not on the flood risk listSO21 1AN: not on the flood risk listSO21 1AQ: not on the flood risk listSO21 1AR: not on the flood risk listSO21 1AS: not on the flood risk listSO21 1AT: not on the flood risk listSO21 1AU: not on the flood risk listSO21 1AW: not on the flood risk listSO21 1AX: not on the flood risk listSO21 1AY: not on the flood risk listSO21 1AZ: not on the flood risk listSO21 1BB: not on the flood risk listSO21 1BE: not on the flood risk listSO21 1BH: not on the flood risk listSO21 1BJ: not on the flood risk listSO21 1BL: not on the flood risk listSO21 1BN: not on the flood risk listSO21 1BP: not on the flood risk listSO21 1BS: not on the flood risk listSO21 1BT: not on the flood risk listSO21 1BU: not on the flood risk listSO21 1BW: not on the flood risk listSO21 1BX: not on the flood risk listSO21 1BY: not on the flood risk listSO21 1DD: not on the flood risk listSO21 1DE: not on the flood risk listSO21 1DG: not on the flood risk listSO21 1DL: not on the flood risk listSO21 1DQ: not on the flood risk listSO21 1DR: not on the flood risk listSO21 1DS: not on the flood risk listSO21 1DT: not on the flood risk listSO21 1DU: not on the flood risk listSO21 1DX: not on the flood risk listSO21 1DY: not on the flood risk listSO21 1DZ: not on the flood risk listSO21 1EA: not on the flood risk listSO21 1ED: not on the flood risk listSO21 1EE: not on the flood risk listSO21 1EF: not on the flood risk listSO21 1EG: not on the flood risk listSO21 1EJ: not on the flood risk listSO21 1EN: not on the flood risk listSO21 1EP: not on the flood risk listSO21 1EQ: not on the flood risk listSO21 1ER: not on the flood risk listSO21 1ET: not on the flood risk listSO21 1EU: not on the flood risk listSO21 1EW: not on the flood risk listSO21 1EX: not on the flood risk listSO21 1EY: not on the flood risk listSO21 1EZ: not on the flood risk listSO21 1FA: not on the flood risk listSO21 1FB: not on the flood risk listSO21 1FE: not on the flood risk listSO21 1FF: not on the flood risk listSO21 1FH: not on the flood risk listSO21 1FJ: not on the flood risk listSO21 1FL: not on the flood risk listSO21 1FN: not on the flood risk listSO21 1FP: not on the flood risk listSO21 1FQ: not on the flood risk listSO21 1FR: not on the flood risk listSO21 1FS: not on the flood risk listSO21 1FT: not on the flood risk listSO21 1FU: not on the flood risk listSO21 1FW: not on the flood risk listSO21 1FX: not on the flood risk listSO21 1FZ: not on the flood risk listSO21 1GA: not on the flood risk listSO21 1GD: not on the flood risk listSO21 1GF: not on the flood risk listSO21 1GG: not on the flood risk listSO21 1GJ: not on the flood risk listSO21 1GL: not on the flood risk listSO21 1GN: not on the flood risk listSO21 1HA: not on the flood risk listSO21 1HB: not on the flood risk listSO21 1HD: not on the flood risk listSO21 1HE: not on the flood risk listSO21 1HF: not on the flood risk listSO21 1HG: not on the flood risk listSO21 1HH: not on the flood risk listSO21 1HJ: not on the flood risk listSO21 1HL: not on the flood risk listSO21 1HN: not on the flood risk listSO21 1HP: not on the flood risk listSO21 1HQ: not on the flood risk listSO21 1HR: not on the flood risk listSO21 1HS: not on the flood risk listSO21 1HT: not on the flood risk listSO21 1HU: not on the flood risk listSO21 1HW: not on the flood risk listSO21 1HZ: not on the flood risk listSO21 1JD: not on the flood risk listSO21 1JE: not on the flood risk listSO21 1JF: not on the flood risk listSO21 1JG: not on the flood risk listSO21 1JH: not on the flood risk listSO21 1JJ: not on the flood risk listSO21 1JL: not on the flood risk listSO21 1JN: not on the flood risk listSO21 1JP: not on the flood risk listSO21 1JQ: not on the flood risk listSO21 1JR: not on the flood risk listSO21 1JS: not on the flood risk listSO21 1JT: not on the flood risk listSO21 1JU: not on the flood risk listSO21 1JW: not on the flood risk listSO21 1JX: not on the flood risk listSO21 1JY: not on the flood risk listSO21 1JZ: not on the flood risk listSO21 1LA: not on the flood risk listSO21 1LB: not on the flood risk listSO21 1LD: not on the flood risk listSO21 1LE: not on the flood risk listSO21 1LF: not on the flood risk listSO21 1LG: not on the flood risk listSO21 1LL: not on the flood risk listSO21 1LN: not on the flood risk listSO21 1LP: not on the flood risk listSO21 1LR: not on the flood risk listSO21 1LS: not on the flood risk listSO21 1LT: not on the flood risk listSO21 1LW: not on the flood risk listSO21 1LX: not on the flood risk listSO21 1LY: not on the flood risk listSO21 1LZ: not on the flood risk listSO21 1NA: not on the flood risk listSO21 1NB: not on the flood risk listSO21 1NG: not on the flood risk listSO21 1NH: not on the flood risk listSO21 1NL: not on the flood risk listSO21 1NN: not on the flood risk listSO21 1NP: not on the flood risk listSO21 1NR: not on the flood risk listSO21 1NS: not on the flood risk listSO21 1NW: not on the flood risk listSO21 1NX: not on the flood risk listSO21 1NY: not on the flood risk listSO21 1PA: not on the flood risk listSO21 1PD: not on the flood risk listSO21 1PE: not on the flood risk listSO21 1PF: not on the flood risk listSO21 1PH: not on the flood risk listSO21 1PJ: not on the flood risk listSO21 1PL: not on the flood risk listSO21 1PP: not on the flood risk listSO21 1PQ: not on the flood risk listSO21 1PR: not on the flood risk listSO21 1PT: not on the flood risk listSO21 1PU: not on the flood risk listSO21 1PX: not on the flood risk listSO21 1PY: not on the flood risk listSO21 1PZ: not on the flood risk listSO21 1QA: not on the flood risk listSO21 1QG: not on the flood risk listSO21 1QH: not on the flood risk listSO21 1QL: not on the flood risk listSO21 1QN: not on the flood risk listSO21 1QP: not on the flood risk listSO21 1QS: not on the flood risk listSO21 1QT: not on the flood risk listSO21 1QU: not on the flood risk listSO21 1QX: not on the flood risk listSO21 1RA: not on the flood risk listSO21 1RD: not on the flood risk listSO21 1RG: not on the flood risk listSO21 1RH: not on the flood risk listSO21 1RL: not on the flood risk listSO21 1RN: not on the flood risk listSO21 1RP: not on the flood risk listSO21 1RR: not on the flood risk listSO21 1RT: not on the flood risk listSO21 1RU: not on the flood risk listSO21 1RW: not on the flood risk listSO21 1RY: not on the flood risk listSO21 1RZ: not on the flood risk listSO21 1SA: not on the flood risk listSO21 1SB: not on the flood risk listSO21 1SD: not on the flood risk listSO21 1SE: not on the flood risk listSO21 1SG: not on the flood risk listSO21 1SH: not on the flood risk listSO21 1SJ: not on the flood risk listSO21 1ST: not on the flood risk listSO21 1SY: not on the flood risk listSO21 1SZ: not on the flood risk listSO21 1TA: not on the flood risk listSO21 1TB: not on the flood risk listSO21 1TD: not on the flood risk listSO21 1TE: not on the flood risk listSO21 1TF: not on the flood risk listSO21 1TH: not on the flood risk listSO21 1TJ: not on the flood risk listSO21 1TP: not on the flood risk listSO21 1TR: not on the flood risk listSO21 1TS: not on the flood risk listSO21 1TT: not on the flood risk listSO21 1TU: not on the flood risk listSO21 1TX: not on the flood risk listSO21 1TY: not on the flood risk listSO21 1TZ: not on the flood risk listSO21 1UD: not on the flood risk listSO21 1UF: not on the flood risk listSO21 1UG: not on the flood risk listSO21 1UJ: not on the flood risk listSO21 1UL: not on the flood risk listSO21 1UN: not on the flood risk listSO21 1UR: not on the flood risk listSO21 1UT: not on the flood risk listSO21 1WG: not on the flood risk listSO21 1XA: not on the flood risk listSO21 1XB: not on the flood risk listSO21 1XD: not on the flood risk listSO21 1XE: not on the flood risk listSO21 1ZL: not on the flood risk listSO21 1TQ: very low flood risk onlySO21 1UW: very low flood risk onlySO21 1UU: very low flood risk onlySO21 1UX: very low flood risk onlySO21 1WP: very low flood risk onlySO21 1EB: low flood risk at worstSO21 1QJ: low flood risk at worstSO21 1BQ: high flood riskSO21 1BZ: high flood riskSO21 1DA: high flood riskSO21 1DB: high flood riskSO21 1DF: high flood riskSO21 1EH: high flood riskSO21 1NT: high flood riskSO21 1QF: high flood riskSO21 1TL: high flood risk WinchesterKings WorthyColden CommonTwyford, Winchester Map of every postcode in the SO21 1 sector, by flood risk Of the 299 postcodes in the SO21 1 sector that ONS places, 9 have a home or business at high risk, 3 are at low risk at worst, 5 are at very low risk only and 282 are not on the Environment Agency's at-risk list. Places named: Winchester, Kings Worthy, Colden Common. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A272A31A34 WinchesterKings WorthyColden Common
  • A home or business at high risk: 9
  • At medium risk at worst: 0
  • At low risk at worst: 3
  • At very low risk only: 5
  • Not on the at-risk list: 282

Of the 299 postcodes in the SO21 1 sector that ONS places, 9 have a home or business at high risk, 3 are at low risk at worst, 5 are at very low risk only and 282 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.

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.

SO21 1BZ10 at high riskSO21 1BQ3 at high riskSO21 1TL3 at high riskSO21 1DA1 at high riskSO21 1DB1 at high riskSO21 1DF1 at high riskSO21 1EH1 at high riskSO21 1NT1 at high riskSO21 1QF1 at high risk

What do homes sell for in SO21 1?

Homes in SO21 1 sold for a typical £468,250 in the 12 months to August 2026, across 88 sales, down 5.8% on the 12 months before, HM Land Registry's figures show.

£468,250 typical price, the 12 months to August 2026
£497,000 12 months to August 2025
▼ down 5.8% on the 12 months before
  • Detached £597,500 30 sales
  • Semi-detached £423,000 34 sales
  • Terraced £362,500 18 sales
  • Flat or maisonette £236,500 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 SO21 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 SO21 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.

SO21 1AASO21 1ABSO21 1ADSO21 1AESO21 1AFSO21 1AGSO21 1AHSO21 1AJSO21 1ALSO21 1ANSO21 1AQSO21 1ARSO21 1ASSO21 1ATSO21 1AUSO21 1AWSO21 1AXSO21 1AYSO21 1AZSO21 1BASO21 1BBSO21 1BDSO21 1BESO21 1BHSO21 1BJSO21 1BLSO21 1BNSO21 1BPSO21 1BQSO21 1BSSO21 1BTSO21 1BUSO21 1BWSO21 1BXSO21 1BYSO21 1BZSO21 1DASO21 1DBSO21 1DDSO21 1DESO21 1DFSO21 1DGSO21 1DJSO21 1DLSO21 1DQSO21 1DRSO21 1DSSO21 1DTSO21 1DUSO21 1DWSO21 1DXSO21 1DYSO21 1DZSO21 1EASO21 1EBSO21 1EDSO21 1EESO21 1EFSO21 1EGSO21 1EHSO21 1EJSO21 1ELSO21 1ENSO21 1EPSO21 1EQSO21 1ERSO21 1ESSO21 1ETSO21 1EUSO21 1EWSO21 1EXSO21 1EYSO21 1EZSO21 1FASO21 1FBSO21 1FDSO21 1FESO21 1FFSO21 1FGSO21 1FHSO21 1FJSO21 1FLSO21 1FNSO21 1FPSO21 1FQSO21 1FRSO21 1FSSO21 1FTSO21 1FUSO21 1FWSO21 1FXSO21 1FYSO21 1FZSO21 1GASO21 1GBSO21 1GDSO21 1GESO21 1GFSO21 1GGSO21 1GHSO21 1GJSO21 1GLSO21 1GNSO21 1GPSO21 1HASO21 1HBSO21 1HDSO21 1HESO21 1HFSO21 1HGSO21 1HHSO21 1HJSO21 1HLSO21 1HNSO21 1HPSO21 1HQSO21 1HRSO21 1HSSO21 1HTSO21 1HUSO21 1HWSO21 1HZSO21 1JDSO21 1JESO21 1JFSO21 1JGSO21 1JHSO21 1JJSO21 1JLSO21 1JNSO21 1JPSO21 1JQSO21 1JRSO21 1JSSO21 1JTSO21 1JUSO21 1JWSO21 1JXSO21 1JYSO21 1JZSO21 1LASO21 1LBSO21 1LDSO21 1LESO21 1LFSO21 1LGSO21 1LLSO21 1LNSO21 1LPSO21 1LRSO21 1LSSO21 1LTSO21 1LUSO21 1LWSO21 1LXSO21 1LYSO21 1LZSO21 1NASO21 1NBSO21 1NESO21 1NGSO21 1NHSO21 1NJSO21 1NLSO21 1NNSO21 1NPSO21 1NRSO21 1NSSO21 1NTSO21 1NUSO21 1NWSO21 1NXSO21 1NYSO21 1NZSO21 1PASO21 1PBSO21 1PDSO21 1PESO21 1PFSO21 1PGSO21 1PHSO21 1PJSO21 1PLSO21 1PNSO21 1PPSO21 1PQSO21 1PRSO21 1PTSO21 1PUSO21 1PXSO21 1PYSO21 1PZSO21 1QASO21 1QBSO21 1QDSO21 1QESO21 1QFSO21 1QGSO21 1QHSO21 1QJSO21 1QLSO21 1QNSO21 1QPSO21 1QQSO21 1QRSO21 1QSSO21 1QTSO21 1QUSO21 1QWSO21 1QXSO21 1QYSO21 1RASO21 1RBSO21 1RDSO21 1RESO21 1RFSO21 1RGSO21 1RHSO21 1RJSO21 1RLSO21 1RNSO21 1RPSO21 1RQSO21 1RRSO21 1RSSO21 1RTSO21 1RUSO21 1RWSO21 1RYSO21 1RZSO21 1SASO21 1SBSO21 1SDSO21 1SESO21 1SFSO21 1SGSO21 1SHSO21 1SJSO21 1SLSO21 1SNSO21 1SPSO21 1SQSO21 1SRSO21 1SSSO21 1STSO21 1SUSO21 1SWSO21 1SXSO21 1SYSO21 1SZSO21 1TASO21 1TBSO21 1TDSO21 1TESO21 1TFSO21 1TGSO21 1THSO21 1TJSO21 1TLSO21 1TNSO21 1TPSO21 1TQSO21 1TRSO21 1TSSO21 1TTSO21 1TUSO21 1TWSO21 1TXSO21 1TYSO21 1TZSO21 1UASO21 1UBSO21 1UDSO21 1UESO21 1UFSO21 1UGSO21 1UHSO21 1UJSO21 1ULSO21 1UNSO21 1UPSO21 1UQSO21 1URSO21 1USSO21 1UTSO21 1UUSO21 1UWSO21 1UXSO21 1UYSO21 1UZSO21 1WGSO21 1WLSO21 1WNSO21 1WPSO21 1XASO21 1XBSO21 1XDSO21 1XESO21 1ZL

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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