SO51 6 postcode sector in the SO51 district

SO51 6 is a sector of the SO51 district: every postcode that starts SO51 6. It has 149 postcodes in use, 5 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 6 sector, by flood risk

Map of every postcode in the SO51 6 sector, by flood risk Of the 149 postcodes in the SO51 6 sector that ONS places, 8 have a home or business at high risk, 4 are at medium risk at worst, 6 are at low risk at worst and 131 are not on the Environment Agency's at-risk list. Places named: Blackwater. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M27A36A27 SO51 6AA: not on the flood risk listSO51 6AD: not on the flood risk listSO51 6AG: not on the flood risk listSO51 6AH: not on the flood risk listSO51 6AJ: not on the flood risk listSO51 6AQ: not on the flood risk listSO51 6AR: not on the flood risk listSO51 6AS: not on the flood risk listSO51 6AT: not on the flood risk listSO51 6AU: not on the flood risk listSO51 6AW: not on the flood risk listSO51 6AX: not on the flood risk listSO51 6AY: not on the flood risk listSO51 6AZ: not on the flood risk listSO51 6BB: not on the flood risk listSO51 6BD: not on the flood risk listSO51 6BE: not on the flood risk listSO51 6BH: not on the flood risk listSO51 6BJ: not on the flood risk listSO51 6BL: not on the flood risk listSO51 6BN: not on the flood risk listSO51 6BP: not on the flood risk listSO51 6BQ: not on the flood risk listSO51 6BR: not on the flood risk listSO51 6BS: not on the flood risk listSO51 6BT: not on the flood risk listSO51 6BW: not on the flood risk listSO51 6BX: not on the flood risk listSO51 6BY: not on the flood risk listSO51 6BZ: not on the flood risk listSO51 6DA: not on the flood risk listSO51 6DB: not on the flood risk listSO51 6DD: not on the flood risk listSO51 6DE: not on the flood risk listSO51 6DF: not on the flood risk listSO51 6DG: not on the flood risk listSO51 6DL: not on the flood risk listSO51 6DN: not on the flood risk listSO51 6DP: not on the flood risk listSO51 6DQ: not on the flood risk listSO51 6DS: not on the flood risk listSO51 6DT: not on the flood risk listSO51 6DU: not on the flood risk listSO51 6DX: not on the flood risk listSO51 6DY: not on the flood risk listSO51 6DZ: not on the flood risk listSO51 6EA: not on the flood risk listSO51 6EB: not on the flood risk listSO51 6ED: not on the flood risk listSO51 6EG: not on the flood risk listSO51 6EH: not on the flood risk listSO51 6EJ: not on the flood risk listSO51 6EL: not on the flood risk listSO51 6EN: not on the flood risk listSO51 6EQ: not on the flood risk listSO51 6ER: not on the flood risk listSO51 6ES: not on the flood risk listSO51 6ET: not on the flood risk listSO51 6EU: not on the flood risk listSO51 6EW: not on the flood risk listSO51 6EX: not on the flood risk listSO51 6EY: not on the flood risk listSO51 6EZ: not on the flood risk listSO51 6FA: not on the flood risk listSO51 6FB: not on the flood risk listSO51 6FD: not on the flood risk listSO51 6FE: not on the flood risk listSO51 6FF: not on the flood risk listSO51 6FG: not on the flood risk listSO51 6FH: not on the flood risk listSO51 6FJ: not on the flood risk listSO51 6FL: not on the flood risk listSO51 6FN: not on the flood risk listSO51 6FP: not on the flood risk listSO51 6FR: not on the flood risk listSO51 6FT: not on the flood risk listSO51 6FU: not on the flood risk listSO51 6FW: not on the flood risk listSO51 6FX: not on the flood risk listSO51 6FY: not on the flood risk listSO51 6FZ: not on the flood risk listSO51 6GA: not on the flood risk listSO51 6GB: not on the flood risk listSO51 6GD: not on the flood risk listSO51 6GF: not on the flood risk listSO51 6GG: not on the flood risk listSO51 6GH: not on the flood risk listSO51 6GJ: not on the flood risk listSO51 6GP: not on the flood risk listSO51 6GQ: not on the flood risk listSO51 6GR: not on the flood risk listSO51 6GS: not on the flood risk listSO51 6GT: not on the flood risk listSO51 6GU: not on the flood risk listSO51 6GW: not on the flood risk listSO51 6GX: not on the flood risk listSO51 6GY: not on the flood risk listSO51 6GZ: not on the flood risk listSO51 6HA: not on the flood risk listSO51 6HB: not on the flood risk listSO51 6HE: not on the flood risk listSO51 6HH: not on the flood risk listSO51 6JR: not on the flood risk listSO51 6JS: not on the flood risk listSO51 6JT: not on the flood risk listSO51 6JU: not on the flood risk listSO51 6JW: not on the flood risk listSO51 6JX: not on the flood risk listSO51 6JY: not on the flood risk listSO51 6RA: not on the flood risk listSO51 6RB: not on the flood risk listSO51 6RD: not on the flood risk listSO51 6RE: not on the flood risk listSO51 6RF: not on the flood risk listSO51 6RG: not on the flood risk listSO51 6RH: not on the flood risk listSO51 6RJ: not on the flood risk listSO51 6RL: not on the flood risk listSO51 6RN: not on the flood risk listSO51 6RS: not on the flood risk listSO51 6WA: not on the flood risk listSO51 6ZA: not on the flood risk listSO51 6ZB: not on the flood risk listSO51 6ZE: not on the flood risk listSO51 6ZJ: not on the flood risk listSO51 6ZL: not on the flood risk listSO51 6ZR: not on the flood risk listSO51 6BA: low flood risk at worstSO51 6DH: low flood risk at worstSO51 6DR: low flood risk at worstSO51 6DW: low flood risk at worstSO51 6FS: low flood risk at worstSO51 6GL: low flood risk at worstSO51 6AF: medium flood risk at worstSO51 6AP: medium flood risk at worstSO51 6DJ: medium flood risk at worstSO51 6EF: medium flood risk at worstSO51 6AB: high flood riskSO51 6AE: high flood riskSO51 6AL: high flood riskSO51 6AN: high flood riskSO51 6BG: high flood riskSO51 6EE: high flood riskSO51 6EP: high flood riskSO51 6FQ: high flood risk Blackwater Map of every postcode in the SO51 6 sector, by flood risk Of the 149 postcodes in the SO51 6 sector that ONS places, 8 have a home or business at high risk, 4 are at medium risk at worst, 6 are at low risk at worst and 131 are not on the Environment Agency's at-risk list. Places named: Blackwater. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. M27 Blackwater
  • A home or business at high risk: 8
  • At medium risk at worst: 4
  • At low risk at worst: 6
  • At very low risk only: 0
  • Not on the at-risk list: 131

Of the 149 postcodes in the SO51 6 sector that ONS places, 8 have a home or business at high risk, 4 are at medium risk at worst, 6 are at low risk at worst and 131 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.

SO51 6AN3 at high riskSO51 6AB2 at high riskSO51 6AL2 at high riskSO51 6FQ2 at high riskSO51 6BG1 at high riskSO51 6AE1 at high riskSO51 6EE1 at high riskSO51 6EP1 at high risk

What do homes sell for in SO51 6?

Homes in SO51 6 sold for a typical £635,000 in the 12 months to August 2026, across 41 sales, up 7.6% on the 12 months before, HM Land Registry's figures show.

£635,000 typical price, the 12 months to August 2026
£590,000 12 months to August 2025
▲ up 7.6% on the 12 months before
  • Detached £719,500 32 sales
  • Semi-detached 4 sales, too few to price
  • Terraced 2 sales, too few to price
  • Flat or maisonette 3 sales, too few to price

Standard sales of homes at market value at the postcodes that start SO51 6. 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 6

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 6AASO51 6ABSO51 6ADSO51 6AESO51 6AFSO51 6AGSO51 6AHSO51 6AJSO51 6ALSO51 6ANSO51 6APSO51 6AQSO51 6ARSO51 6ASSO51 6ATSO51 6AUSO51 6AWSO51 6AXSO51 6AYSO51 6AZSO51 6BASO51 6BBSO51 6BDSO51 6BESO51 6BGSO51 6BHSO51 6BJSO51 6BLSO51 6BNSO51 6BPSO51 6BQSO51 6BRSO51 6BSSO51 6BTSO51 6BUSO51 6BWSO51 6BXSO51 6BYSO51 6BZSO51 6DASO51 6DBSO51 6DDSO51 6DESO51 6DFSO51 6DGSO51 6DHSO51 6DJSO51 6DLSO51 6DNSO51 6DPSO51 6DQSO51 6DRSO51 6DSSO51 6DTSO51 6DUSO51 6DWSO51 6DXSO51 6DYSO51 6DZSO51 6EASO51 6EBSO51 6EDSO51 6EESO51 6EFSO51 6EGSO51 6EHSO51 6EJSO51 6ELSO51 6ENSO51 6EPSO51 6EQSO51 6ERSO51 6ESSO51 6ETSO51 6EUSO51 6EWSO51 6EXSO51 6EYSO51 6EZSO51 6FASO51 6FBSO51 6FDSO51 6FESO51 6FFSO51 6FGSO51 6FHSO51 6FJSO51 6FLSO51 6FNSO51 6FPSO51 6FQSO51 6FRSO51 6FSSO51 6FTSO51 6FUSO51 6FWSO51 6FXSO51 6FYSO51 6FZSO51 6GASO51 6GBSO51 6GDSO51 6GESO51 6GFSO51 6GGSO51 6GHSO51 6GJSO51 6GLSO51 6GNSO51 6GPSO51 6GQSO51 6GRSO51 6GSSO51 6GTSO51 6GUSO51 6GWSO51 6GXSO51 6GYSO51 6GZSO51 6HASO51 6HBSO51 6HESO51 6HFSO51 6HHSO51 6JRSO51 6JSSO51 6JTSO51 6JUSO51 6JWSO51 6JXSO51 6JYSO51 6RASO51 6RBSO51 6RDSO51 6RESO51 6RFSO51 6RGSO51 6RHSO51 6RJSO51 6RLSO51 6RNSO51 6RSSO51 6WASO51 6ZASO51 6ZBSO51 6ZESO51 6ZJSO51 6ZLSO51 6ZR

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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