CO4 3 postcode sector in the CO4 district

CO4 3 is a sector of the CO4 district: every postcode that starts CO4 3. It has 346 postcodes in use, 2 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 CO4 3 sector, by flood risk

Map of every postcode in the CO4 3 sector, by flood risk Of the 346 postcodes in the CO4 3 sector that ONS places, 9 have a home or business at high risk, 3 are at low risk at worst, 9 are at very low risk only and 325 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Greenstead, St Anne's and St John's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A133 CO4 3AE: not on the flood risk listCO4 3AG: not on the flood risk listCO4 3AH: not on the flood risk listCO4 3AJ: not on the flood risk listCO4 3AN: not on the flood risk listCO4 3AP: not on the flood risk listCO4 3AQ: not on the flood risk listCO4 3AR: not on the flood risk listCO4 3AS: not on the flood risk listCO4 3AT: not on the flood risk listCO4 3AU: not on the flood risk listCO4 3AW: not on the flood risk listCO4 3AX: not on the flood risk listCO4 3AY: not on the flood risk listCO4 3BA: not on the flood risk listCO4 3BE: not on the flood risk listCO4 3BF: not on the flood risk listCO4 3BH: not on the flood risk listCO4 3BJ: not on the flood risk listCO4 3BN: not on the flood risk listCO4 3BP: not on the flood risk listCO4 3BS: not on the flood risk listCO4 3BT: not on the flood risk listCO4 3BU: not on the flood risk listCO4 3BW: not on the flood risk listCO4 3BX: not on the flood risk listCO4 3BY: not on the flood risk listCO4 3BZ: not on the flood risk listCO4 3DA: not on the flood risk listCO4 3DB: not on the flood risk listCO4 3DD: not on the flood risk listCO4 3DE: not on the flood risk listCO4 3DF: not on the flood risk listCO4 3DG: not on the flood risk listCO4 3DH: not on the flood risk listCO4 3DJ: not on the flood risk listCO4 3DN: not on the flood risk listCO4 3DQ: not on the flood risk listCO4 3DR: not on the flood risk listCO4 3DS: not on the flood risk listCO4 3DT: not on the flood risk listCO4 3DU: not on the flood risk listCO4 3DW: not on the flood risk listCO4 3DX: not on the flood risk listCO4 3DY: not on the flood risk listCO4 3DZ: not on the flood risk listCO4 3EA: not on the flood risk listCO4 3EB: not on the flood risk listCO4 3ED: not on the flood risk listCO4 3EE: not on the flood risk listCO4 3EF: not on the flood risk listCO4 3EG: not on the flood risk listCO4 3EH: not on the flood risk listCO4 3EJ: not on the flood risk listCO4 3EL: not on the flood risk listCO4 3EN: not on the flood risk listCO4 3EP: not on the flood risk listCO4 3EQ: not on the flood risk listCO4 3ER: not on the flood risk listCO4 3ES: not on the flood risk listCO4 3EU: not on the flood risk listCO4 3EW: not on the flood risk listCO4 3EX: not on the flood risk listCO4 3EY: not on the flood risk listCO4 3EZ: not on the flood risk listCO4 3FA: not on the flood risk listCO4 3FB: not on the flood risk listCO4 3FD: not on the flood risk listCO4 3FE: not on the flood risk listCO4 3FF: not on the flood risk listCO4 3FG: not on the flood risk listCO4 3FH: not on the flood risk listCO4 3FJ: not on the flood risk listCO4 3FL: not on the flood risk listCO4 3FN: not on the flood risk listCO4 3FP: not on the flood risk listCO4 3FQ: not on the flood risk listCO4 3FR: not on the flood risk listCO4 3FS: not on the flood risk listCO4 3FT: not on the flood risk listCO4 3FU: not on the flood risk listCO4 3FW: not on the flood risk listCO4 3FX: not on the flood risk listCO4 3FY: not on the flood risk listCO4 3GA: not on the flood risk listCO4 3GB: not on the flood risk listCO4 3GE: not on the flood risk listCO4 3GF: not on the flood risk listCO4 3GH: not on the flood risk listCO4 3GQ: not on the flood risk listCO4 3GS: not on the flood risk listCO4 3GW: not on the flood risk listCO4 3GX: not on the flood risk listCO4 3HA: not on the flood risk listCO4 3HB: not on the flood risk listCO4 3HD: not on the flood risk listCO4 3HF: not on the flood risk listCO4 3HG: not on the flood risk listCO4 3HH: not on the flood risk listCO4 3HL: not on the flood risk listCO4 3HN: not on the flood risk listCO4 3HP: not on the flood risk listCO4 3HQ: not on the flood risk listCO4 3HR: not on the flood risk listCO4 3HS: not on the flood risk listCO4 3HT: not on the flood risk listCO4 3HU: not on the flood risk listCO4 3HX: not on the flood risk listCO4 3HY: not on the flood risk listCO4 3HZ: not on the flood risk listCO4 3JA: not on the flood risk listCO4 3JB: not on the flood risk listCO4 3JD: not on the flood risk listCO4 3JE: not on the flood risk listCO4 3JF: not on the flood risk listCO4 3JG: not on the flood risk listCO4 3JH: not on the flood risk listCO4 3JJ: not on the flood risk listCO4 3JL: not on the flood risk listCO4 3JN: not on the flood risk listCO4 3JP: not on the flood risk listCO4 3JR: not on the flood risk listCO4 3JS: not on the flood risk listCO4 3JT: not on the flood risk listCO4 3JU: not on the flood risk listCO4 3JW: not on the flood risk listCO4 3JX: not on the flood risk listCO4 3JZ: not on the flood risk listCO4 3LA: not on the flood risk listCO4 3LB: not on the flood risk listCO4 3LD: not on the flood risk listCO4 3LE: not on the flood risk listCO4 3LF: not on the flood risk listCO4 3LG: not on the flood risk listCO4 3LH: not on the flood risk listCO4 3LJ: not on the flood risk listCO4 3LL: not on the flood risk listCO4 3LN: not on the flood risk listCO4 3LP: not on the flood risk listCO4 3LQ: not on the flood risk listCO4 3LR: not on the flood risk listCO4 3LS: not on the flood risk listCO4 3LT: not on the flood risk listCO4 3LU: not on the flood risk listCO4 3LW: not on the flood risk listCO4 3LX: not on the flood risk listCO4 3LY: not on the flood risk listCO4 3LZ: not on the flood risk listCO4 3NA: not on the flood risk listCO4 3NB: not on the flood risk listCO4 3ND: not on the flood risk listCO4 3NE: not on the flood risk listCO4 3NF: not on the flood risk listCO4 3NG: not on the flood risk listCO4 3NH: not on the flood risk listCO4 3NJ: not on the flood risk listCO4 3NL: not on the flood risk listCO4 3NN: not on the flood risk listCO4 3NP: not on the flood risk listCO4 3NQ: not on the flood risk listCO4 3NR: not on the flood risk listCO4 3NS: not on the flood risk listCO4 3NT: not on the flood risk listCO4 3NU: not on the flood risk listCO4 3NW: not on the flood risk listCO4 3NX: not on the flood risk listCO4 3NY: not on the flood risk listCO4 3NZ: not on the flood risk listCO4 3PA: not on the flood risk listCO4 3PB: not on the flood risk listCO4 3PD: not on the flood risk listCO4 3PE: not on the flood risk listCO4 3PF: not on the flood risk listCO4 3PG: not on the flood risk listCO4 3PH: not on the flood risk listCO4 3PJ: not on the flood risk listCO4 3PL: not on the flood risk listCO4 3PN: not on the flood risk listCO4 3PP: not on the flood risk listCO4 3PQ: not on the flood risk listCO4 3PR: not on the flood risk listCO4 3PS: not on the flood risk listCO4 3PT: not on the flood risk listCO4 3PU: not on the flood risk listCO4 3PW: not on the flood risk listCO4 3PX: not on the flood risk listCO4 3PY: not on the flood risk listCO4 3PZ: not on the flood risk listCO4 3QA: not on the flood risk listCO4 3QB: not on the flood risk listCO4 3QD: not on the flood risk listCO4 3QE: not on the flood risk listCO4 3QF: not on the flood risk listCO4 3QG: not on the flood risk listCO4 3QH: not on the flood risk listCO4 3QJ: not on the flood risk listCO4 3QL: not on the flood risk listCO4 3QN: not on the flood risk listCO4 3QP: not on the flood risk listCO4 3QQ: not on the flood risk listCO4 3QR: not on the flood risk listCO4 3QS: not on the flood risk listCO4 3QT: not on the flood risk listCO4 3QU: not on the flood risk listCO4 3QX: not on the flood risk listCO4 3QZ: not on the flood risk listCO4 3RA: not on the flood risk listCO4 3RB: not on the flood risk listCO4 3RD: not on the flood risk listCO4 3RE: not on the flood risk listCO4 3RF: not on the flood risk listCO4 3RG: not on the flood risk listCO4 3RH: not on the flood risk listCO4 3RJ: not on the flood risk listCO4 3RL: not on the flood risk listCO4 3RN: not on the flood risk listCO4 3RP: not on the flood risk listCO4 3RR: not on the flood risk listCO4 3RS: not on the flood risk listCO4 3RT: not on the flood risk listCO4 3RU: not on the flood risk listCO4 3RW: not on the flood risk listCO4 3RX: not on the flood risk listCO4 3RY: not on the flood risk listCO4 3RZ: not on the flood risk listCO4 3SA: not on the flood risk listCO4 3SB: not on the flood risk listCO4 3SD: not on the flood risk listCO4 3SE: not on the flood risk listCO4 3SG: not on the flood risk listCO4 3SH: not on the flood risk listCO4 3SJ: not on the flood risk listCO4 3SL: not on the flood risk listCO4 3SN: not on the flood risk listCO4 3SP: not on the flood risk listCO4 3SQ: not on the flood risk listCO4 3SR: not on the flood risk listCO4 3SS: not on the flood risk listCO4 3ST: not on the flood risk listCO4 3SU: not on the flood risk listCO4 3SX: not on the flood risk listCO4 3SZ: not on the flood risk listCO4 3TA: not on the flood risk listCO4 3TB: not on the flood risk listCO4 3TD: not on the flood risk listCO4 3TE: not on the flood risk listCO4 3TF: not on the flood risk listCO4 3TG: not on the flood risk listCO4 3TH: not on the flood risk listCO4 3TJ: not on the flood risk listCO4 3TL: not on the flood risk listCO4 3TN: not on the flood risk listCO4 3TP: not on the flood risk listCO4 3TR: not on the flood risk listCO4 3TS: not on the flood risk listCO4 3TT: not on the flood risk listCO4 3TU: not on the flood risk listCO4 3TW: not on the flood risk listCO4 3TX: not on the flood risk listCO4 3TY: not on the flood risk listCO4 3TZ: not on the flood risk listCO4 3UA: not on the flood risk listCO4 3UG: not on the flood risk listCO4 3UH: not on the flood risk listCO4 3UJ: not on the flood risk listCO4 3UL: not on the flood risk listCO4 3UP: not on the flood risk listCO4 3UR: not on the flood risk listCO4 3US: not on the flood risk listCO4 3UT: not on the flood risk listCO4 3UU: not on the flood risk listCO4 3UW: not on the flood risk listCO4 3UX: not on the flood risk listCO4 3UY: not on the flood risk listCO4 3UZ: not on the flood risk listCO4 3WP: not on the flood risk listCO4 3WZ: not on the flood risk listCO4 3XA: not on the flood risk listCO4 3XB: not on the flood risk listCO4 3XD: not on the flood risk listCO4 3XE: not on the flood risk listCO4 3XF: not on the flood risk listCO4 3XG: not on the flood risk listCO4 3XH: not on the flood risk listCO4 3XJ: not on the flood risk listCO4 3XL: not on the flood risk listCO4 3XN: not on the flood risk listCO4 3XP: not on the flood risk listCO4 3XQ: not on the flood risk listCO4 3XR: not on the flood risk listCO4 3XS: not on the flood risk listCO4 3XT: not on the flood risk listCO4 3XU: not on the flood risk listCO4 3XW: not on the flood risk listCO4 3XX: not on the flood risk listCO4 3XY: not on the flood risk listCO4 3XZ: not on the flood risk listCO4 3YA: not on the flood risk listCO4 3YB: not on the flood risk listCO4 3YD: not on the flood risk listCO4 3YE: not on the flood risk listCO4 3YF: not on the flood risk listCO4 3YG: not on the flood risk listCO4 3YH: not on the flood risk listCO4 3YJ: not on the flood risk listCO4 3YL: not on the flood risk listCO4 3YN: not on the flood risk listCO4 3YP: not on the flood risk listCO4 3YQ: not on the flood risk listCO4 3YR: not on the flood risk listCO4 3YS: not on the flood risk listCO4 3YT: not on the flood risk listCO4 3YU: not on the flood risk listCO4 3YW: not on the flood risk listCO4 3YX: not on the flood risk listCO4 3YY: not on the flood risk listCO4 3YZ: not on the flood risk listCO4 3ZB: not on the flood risk listCO4 3ZD: not on the flood risk listCO4 3ZL: not on the flood risk listCO4 3ZN: not on the flood risk listCO4 3ZP: not on the flood risk listCO4 3ZQ: not on the flood risk listCO4 3ZS: not on the flood risk listCO4 3ZU: not on the flood risk listCO4 3AA: very low flood risk onlyCO4 3AB: very low flood risk onlyCO4 3AD: very low flood risk onlyCO4 3BL: very low flood risk onlyCO4 3GG: very low flood risk onlyCO4 3UN: very low flood risk onlyCO4 3ZH: very low flood risk onlyCO4 3ZR: very low flood risk onlyCO4 3ZT: very low flood risk onlyCO4 3AZ: low flood risk at worstCO4 3BB: low flood risk at worstCO4 3BD: low flood risk at worstCO4 3AL: high flood riskCO4 3DL: high flood riskCO4 3DP: high flood riskCO4 3GD: high flood riskCO4 3ZA: high flood riskCO4 3ZE: high flood riskCO4 3ZF: high flood riskCO4 3ZG: high flood riskCO4 3ZJ: high flood risk GreensteadSt Anne's and St John's 5 postcodes at high or medium risk, outlined: this goes to CO4 3ZA, the one with most homes and businesses at high risk5 postcodes at high or medium risk Map of every postcode in the CO4 3 sector, by flood risk Of the 346 postcodes in the CO4 3 sector that ONS places, 9 have a home or business at high risk, 3 are at low risk at worst, 9 are at very low risk only and 325 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 5 postcodes at high or medium risk. Places named: Greenstead, St Anne's and St John's. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A134A1232 GreensteadSt Anne's and St John's 5 postcodes at high or medium risk, outlined: this goes to CO4 3ZA, the one with most homes and businesses at high risk5 postcodes at high or medium risk
  • 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: 9
  • Not on the at-risk list: 325
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 346 postcodes in the CO4 3 sector that ONS places, 9 have a home or business at high risk, 3 are at low risk at worst, 9 are at very low risk only and 325 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. 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.

CO4 3ZA283 at high riskCO4 3ZF32 at high riskCO4 3GD30 at high riskCO4 3ZE28 at high riskCO4 3DP17 at high riskCO4 3ZG11 at high riskCO4 3ZJ11 at high riskCO4 3AL2 at high riskCO4 3DL1 at high risk

Where the postcodes at high or medium risk lie together

  • 5 postcodes at high or medium risk, outlined on the map. CO4 3ZA, is the one with most homes and businesses at high risk.

What do homes sell for in CO4 3?

Homes in CO4 3 sold for a typical £300,000 in the 12 months to August 2026, across 105 sales, up 7.1% on the 12 months before, HM Land Registry's figures show.

£300,000 typical price, the 12 months to August 2026
£280,000 12 months to August 2025
▲ up 7.1% on the 12 months before
  • Detached £400,000 29 sales
  • Semi-detached £300,000 42 sales
  • Terraced £248,000 18 sales
  • Flat or maisonette £150,000 16 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 CO4 3. 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 CO4 3

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.

CO4 3AACO4 3ABCO4 3ADCO4 3AECO4 3AGCO4 3AHCO4 3AJCO4 3ALCO4 3ANCO4 3APCO4 3AQCO4 3ARCO4 3ASCO4 3ATCO4 3AUCO4 3AWCO4 3AXCO4 3AYCO4 3AZCO4 3BACO4 3BBCO4 3BDCO4 3BECO4 3BFCO4 3BHCO4 3BJCO4 3BLCO4 3BNCO4 3BPCO4 3BSCO4 3BTCO4 3BUCO4 3BWCO4 3BXCO4 3BYCO4 3BZCO4 3DACO4 3DBCO4 3DDCO4 3DECO4 3DFCO4 3DGCO4 3DHCO4 3DJCO4 3DLCO4 3DNCO4 3DPCO4 3DQCO4 3DRCO4 3DSCO4 3DTCO4 3DUCO4 3DWCO4 3DXCO4 3DYCO4 3DZCO4 3EACO4 3EBCO4 3EDCO4 3EECO4 3EFCO4 3EGCO4 3EHCO4 3EJCO4 3ELCO4 3ENCO4 3EPCO4 3EQCO4 3ERCO4 3ESCO4 3EUCO4 3EWCO4 3EXCO4 3EYCO4 3EZCO4 3FACO4 3FBCO4 3FDCO4 3FECO4 3FFCO4 3FGCO4 3FHCO4 3FJCO4 3FLCO4 3FNCO4 3FPCO4 3FQCO4 3FRCO4 3FSCO4 3FTCO4 3FUCO4 3FWCO4 3FXCO4 3FYCO4 3GACO4 3GBCO4 3GDCO4 3GECO4 3GFCO4 3GGCO4 3GHCO4 3GQCO4 3GSCO4 3GWCO4 3GXCO4 3HACO4 3HBCO4 3HDCO4 3HFCO4 3HGCO4 3HHCO4 3HLCO4 3HNCO4 3HPCO4 3HQCO4 3HRCO4 3HSCO4 3HTCO4 3HUCO4 3HXCO4 3HYCO4 3HZCO4 3JACO4 3JBCO4 3JDCO4 3JECO4 3JFCO4 3JGCO4 3JHCO4 3JJCO4 3JLCO4 3JNCO4 3JPCO4 3JRCO4 3JSCO4 3JTCO4 3JUCO4 3JWCO4 3JXCO4 3JZCO4 3LACO4 3LBCO4 3LDCO4 3LECO4 3LFCO4 3LGCO4 3LHCO4 3LJCO4 3LLCO4 3LNCO4 3LPCO4 3LQCO4 3LRCO4 3LSCO4 3LTCO4 3LUCO4 3LWCO4 3LXCO4 3LYCO4 3LZCO4 3NACO4 3NBCO4 3NDCO4 3NECO4 3NFCO4 3NGCO4 3NHCO4 3NJCO4 3NLCO4 3NNCO4 3NPCO4 3NQCO4 3NRCO4 3NSCO4 3NTCO4 3NUCO4 3NWCO4 3NXCO4 3NYCO4 3NZCO4 3PACO4 3PBCO4 3PDCO4 3PECO4 3PFCO4 3PGCO4 3PHCO4 3PJCO4 3PLCO4 3PNCO4 3PPCO4 3PQCO4 3PRCO4 3PSCO4 3PTCO4 3PUCO4 3PWCO4 3PXCO4 3PYCO4 3PZCO4 3QACO4 3QBCO4 3QDCO4 3QECO4 3QFCO4 3QGCO4 3QHCO4 3QJCO4 3QLCO4 3QNCO4 3QPCO4 3QQCO4 3QRCO4 3QSCO4 3QTCO4 3QUCO4 3QXCO4 3QZCO4 3RACO4 3RBCO4 3RDCO4 3RECO4 3RFCO4 3RGCO4 3RHCO4 3RJCO4 3RLCO4 3RNCO4 3RPCO4 3RRCO4 3RSCO4 3RTCO4 3RUCO4 3RWCO4 3RXCO4 3RYCO4 3RZCO4 3SACO4 3SBCO4 3SDCO4 3SECO4 3SGCO4 3SHCO4 3SJCO4 3SLCO4 3SNCO4 3SPCO4 3SQCO4 3SRCO4 3SSCO4 3STCO4 3SUCO4 3SXCO4 3SZCO4 3TACO4 3TBCO4 3TDCO4 3TECO4 3TFCO4 3TGCO4 3THCO4 3TJCO4 3TLCO4 3TNCO4 3TPCO4 3TRCO4 3TSCO4 3TTCO4 3TUCO4 3TWCO4 3TXCO4 3TYCO4 3TZCO4 3UACO4 3UGCO4 3UHCO4 3UJCO4 3ULCO4 3UNCO4 3UPCO4 3URCO4 3USCO4 3UTCO4 3UUCO4 3UWCO4 3UXCO4 3UYCO4 3UZCO4 3WPCO4 3WZCO4 3XACO4 3XBCO4 3XDCO4 3XECO4 3XFCO4 3XGCO4 3XHCO4 3XJCO4 3XLCO4 3XNCO4 3XPCO4 3XQCO4 3XRCO4 3XSCO4 3XTCO4 3XUCO4 3XWCO4 3XXCO4 3XYCO4 3XZCO4 3YACO4 3YBCO4 3YDCO4 3YECO4 3YFCO4 3YGCO4 3YHCO4 3YJCO4 3YLCO4 3YNCO4 3YPCO4 3YQCO4 3YRCO4 3YSCO4 3YTCO4 3YUCO4 3YWCO4 3YXCO4 3YYCO4 3YZCO4 3ZACO4 3ZBCO4 3ZDCO4 3ZECO4 3ZFCO4 3ZGCO4 3ZHCO4 3ZJCO4 3ZLCO4 3ZNCO4 3ZPCO4 3ZQCO4 3ZRCO4 3ZSCO4 3ZTCO4 3ZU

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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