CO3 9 postcode sector in the CO3 district

CO3 9 is a sector of the CO3 district: every postcode that starts CO3 9. It has 148 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 CO3 9 sector, by flood risk

Map of every postcode in the CO3 9 sector, by flood risk Of the 148 postcodes in the CO3 9 sector that ONS places, 4 have a home or business at high risk, 1 are at medium risk at worst and 143 are not on the Environment Agency's at-risk list. Places named: Prettygate, Lexden and Braiswick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A12 CO3 9AA: not on the flood risk listCO3 9AB: not on the flood risk listCO3 9AD: not on the flood risk listCO3 9AE: not on the flood risk listCO3 9AF: not on the flood risk listCO3 9AG: not on the flood risk listCO3 9AH: not on the flood risk listCO3 9AJ: not on the flood risk listCO3 9AL: not on the flood risk listCO3 9AN: not on the flood risk listCO3 9AP: not on the flood risk listCO3 9AQ: not on the flood risk listCO3 9AR: not on the flood risk listCO3 9AS: not on the flood risk listCO3 9AT: not on the flood risk listCO3 9AU: not on the flood risk listCO3 9AW: not on the flood risk listCO3 9AX: not on the flood risk listCO3 9AY: not on the flood risk listCO3 9AZ: not on the flood risk listCO3 9BA: not on the flood risk listCO3 9BB: not on the flood risk listCO3 9BD: not on the flood risk listCO3 9BE: not on the flood risk listCO3 9BG: not on the flood risk listCO3 9BH: not on the flood risk listCO3 9BJ: not on the flood risk listCO3 9BN: not on the flood risk listCO3 9BP: not on the flood risk listCO3 9BQ: not on the flood risk listCO3 9BS: not on the flood risk listCO3 9BT: not on the flood risk listCO3 9BU: not on the flood risk listCO3 9BW: not on the flood risk listCO3 9BX: not on the flood risk listCO3 9BY: not on the flood risk listCO3 9BZ: not on the flood risk listCO3 9DA: not on the flood risk listCO3 9DB: not on the flood risk listCO3 9DD: not on the flood risk listCO3 9DE: not on the flood risk listCO3 9DF: not on the flood risk listCO3 9DG: not on the flood risk listCO3 9DH: not on the flood risk listCO3 9DJ: not on the flood risk listCO3 9DL: not on the flood risk listCO3 9DN: not on the flood risk listCO3 9DP: not on the flood risk listCO3 9DQ: not on the flood risk listCO3 9DR: not on the flood risk listCO3 9DS: not on the flood risk listCO3 9DT: not on the flood risk listCO3 9DU: not on the flood risk listCO3 9DW: not on the flood risk listCO3 9DX: not on the flood risk listCO3 9DY: not on the flood risk listCO3 9DZ: not on the flood risk listCO3 9EA: not on the flood risk listCO3 9EB: not on the flood risk listCO3 9ED: not on the flood risk listCO3 9EE: not on the flood risk listCO3 9EF: not on the flood risk listCO3 9EG: not on the flood risk listCO3 9EH: not on the flood risk listCO3 9EJ: not on the flood risk listCO3 9EL: not on the flood risk listCO3 9EN: not on the flood risk listCO3 9EP: not on the flood risk listCO3 9EQ: not on the flood risk listCO3 9ER: not on the flood risk listCO3 9ES: not on the flood risk listCO3 9ET: not on the flood risk listCO3 9EU: not on the flood risk listCO3 9EW: not on the flood risk listCO3 9EX: not on the flood risk listCO3 9EY: not on the flood risk listCO3 9EZ: not on the flood risk listCO3 9FA: not on the flood risk listCO3 9FB: not on the flood risk listCO3 9FD: not on the flood risk listCO3 9FE: not on the flood risk listCO3 9FF: not on the flood risk listCO3 9FG: not on the flood risk listCO3 9FH: not on the flood risk listCO3 9FJ: not on the flood risk listCO3 9FL: not on the flood risk listCO3 9FN: not on the flood risk listCO3 9FP: not on the flood risk listCO3 9FQ: not on the flood risk listCO3 9FR: not on the flood risk listCO3 9FS: not on the flood risk listCO3 9FT: not on the flood risk listCO3 9FU: not on the flood risk listCO3 9FW: not on the flood risk listCO3 9FX: not on the flood risk listCO3 9FY: not on the flood risk listCO3 9FZ: not on the flood risk listCO3 9GA: not on the flood risk listCO3 9GB: not on the flood risk listCO3 9GS: not on the flood risk listCO3 9ST: not on the flood risk listCO3 9TA: not on the flood risk listCO3 9TE: not on the flood risk listCO3 9TG: not on the flood risk listCO3 9TH: not on the flood risk listCO3 9TJ: not on the flood risk listCO3 9TL: not on the flood risk listCO3 9TN: not on the flood risk listCO3 9TP: not on the flood risk listCO3 9TQ: not on the flood risk listCO3 9TR: not on the flood risk listCO3 9TS: not on the flood risk listCO3 9TT: not on the flood risk listCO3 9TU: not on the flood risk listCO3 9TW: not on the flood risk listCO3 9TX: not on the flood risk listCO3 9TY: not on the flood risk listCO3 9UA: not on the flood risk listCO3 9UE: not on the flood risk listCO3 9UF: not on the flood risk listCO3 9UW: not on the flood risk listCO3 9UY: not on the flood risk listCO3 9UZ: not on the flood risk listCO3 9WF: not on the flood risk listCO3 9XA: not on the flood risk listCO3 9XB: not on the flood risk listCO3 9XD: not on the flood risk listCO3 9XE: not on the flood risk listCO3 9XF: not on the flood risk listCO3 9XG: not on the flood risk listCO3 9XH: not on the flood risk listCO3 9XJ: not on the flood risk listCO3 9XL: not on the flood risk listCO3 9XN: not on the flood risk listCO3 9XP: not on the flood risk listCO3 9XQ: not on the flood risk listCO3 9XR: not on the flood risk listCO3 9XS: not on the flood risk listCO3 9XT: not on the flood risk listCO3 9XU: not on the flood risk listCO3 9XW: not on the flood risk listCO3 9XX: not on the flood risk listCO3 9XZ: not on the flood risk listCO3 9SY: medium flood risk at worstCO3 9SX: high flood riskCO3 9TB: high flood riskCO3 9TF: high flood riskCO3 9TZ: high flood risk PrettygateLexden and Braiswick Map of every postcode in the CO3 9 sector, by flood risk Of the 148 postcodes in the CO3 9 sector that ONS places, 4 have a home or business at high risk, 1 are at medium risk at worst and 143 are not on the Environment Agency's at-risk list. Places named: Prettygate, Lexden and Braiswick. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A12 PrettygateLexden and Braiswick
  • A home or business at high risk: 4
  • At medium risk at worst: 1
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 143

Of the 148 postcodes in the CO3 9 sector that ONS places, 4 have a home or business at high risk, 1 are at medium risk at worst and 143 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. 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.

CO3 9TZ2 at high riskCO3 9TB1 at high riskCO3 9TF1 at high riskCO3 9SX1 at high risk

What do homes sell for in CO3 9?

Homes in CO3 9 sold for a typical £325,000 in the 12 months to August 2026, across 63 sales, down 11.8% on the 12 months before, HM Land Registry's figures show.

£325,000 typical price, the 12 months to August 2026
£368,500 12 months to August 2025
▼ down 11.8% on the 12 months before
  • Detached £455,000 24 sales
  • Semi-detached £320,000 22 sales
  • Terraced £280,000 11 sales
  • Flat or maisonette £178,250 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 CO3 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 CO3 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.

CO3 9AACO3 9ABCO3 9ADCO3 9AECO3 9AFCO3 9AGCO3 9AHCO3 9AJCO3 9ALCO3 9ANCO3 9APCO3 9AQCO3 9ARCO3 9ASCO3 9ATCO3 9AUCO3 9AWCO3 9AXCO3 9AYCO3 9AZCO3 9BACO3 9BBCO3 9BDCO3 9BECO3 9BGCO3 9BHCO3 9BJCO3 9BNCO3 9BPCO3 9BQCO3 9BSCO3 9BTCO3 9BUCO3 9BWCO3 9BXCO3 9BYCO3 9BZCO3 9DACO3 9DBCO3 9DDCO3 9DECO3 9DFCO3 9DGCO3 9DHCO3 9DJCO3 9DLCO3 9DNCO3 9DPCO3 9DQCO3 9DRCO3 9DSCO3 9DTCO3 9DUCO3 9DWCO3 9DXCO3 9DYCO3 9DZCO3 9EACO3 9EBCO3 9EDCO3 9EECO3 9EFCO3 9EGCO3 9EHCO3 9EJCO3 9ELCO3 9ENCO3 9EPCO3 9EQCO3 9ERCO3 9ESCO3 9ETCO3 9EUCO3 9EWCO3 9EXCO3 9EYCO3 9EZCO3 9FACO3 9FBCO3 9FDCO3 9FECO3 9FFCO3 9FGCO3 9FHCO3 9FJCO3 9FLCO3 9FNCO3 9FPCO3 9FQCO3 9FRCO3 9FSCO3 9FTCO3 9FUCO3 9FWCO3 9FXCO3 9FYCO3 9FZCO3 9GACO3 9GBCO3 9GSCO3 9STCO3 9SXCO3 9SYCO3 9TACO3 9TBCO3 9TECO3 9TFCO3 9TGCO3 9THCO3 9TJCO3 9TLCO3 9TNCO3 9TPCO3 9TQCO3 9TRCO3 9TSCO3 9TTCO3 9TUCO3 9TWCO3 9TXCO3 9TYCO3 9TZCO3 9UACO3 9UECO3 9UFCO3 9UWCO3 9UYCO3 9UZCO3 9WFCO3 9XACO3 9XBCO3 9XDCO3 9XECO3 9XFCO3 9XGCO3 9XHCO3 9XJCO3 9XLCO3 9XNCO3 9XPCO3 9XQCO3 9XRCO3 9XSCO3 9XTCO3 9XUCO3 9XWCO3 9XXCO3 9XZ

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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