CO9 1 postcode sector in the CO9 district

CO9 1 is a sector of the CO9 district: every postcode that starts CO9 1. It has 293 postcodes in use, 3 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 CO9 1 sector, by flood risk

Map of every postcode in the CO9 1 sector, by flood risk Of the 293 postcodes in the CO9 1 sector that ONS places, 14 have a home or business at high risk, 3 are at medium risk at worst, 7 are at low risk at worst and 269 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 12 postcodes at high or medium risk. Places named: Halstead. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A131 CO9 1AA: not on the flood risk listCO9 1AB: not on the flood risk listCO9 1AD: not on the flood risk listCO9 1AE: not on the flood risk listCO9 1AF: not on the flood risk listCO9 1AG: not on the flood risk listCO9 1AH: not on the flood risk listCO9 1AJ: not on the flood risk listCO9 1AL: not on the flood risk listCO9 1AN: not on the flood risk listCO9 1AP: not on the flood risk listCO9 1AQ: not on the flood risk listCO9 1AR: not on the flood risk listCO9 1AS: not on the flood risk listCO9 1AT: not on the flood risk listCO9 1AW: not on the flood risk listCO9 1AX: not on the flood risk listCO9 1AY: not on the flood risk listCO9 1AZ: not on the flood risk listCO9 1BB: not on the flood risk listCO9 1BD: not on the flood risk listCO9 1BE: not on the flood risk listCO9 1BG: not on the flood risk listCO9 1BH: not on the flood risk listCO9 1BJ: not on the flood risk listCO9 1BL: not on the flood risk listCO9 1BN: not on the flood risk listCO9 1BP: not on the flood risk listCO9 1BQ: not on the flood risk listCO9 1BS: not on the flood risk listCO9 1BT: not on the flood risk listCO9 1BU: not on the flood risk listCO9 1BW: not on the flood risk listCO9 1BX: not on the flood risk listCO9 1BY: not on the flood risk listCO9 1BZ: not on the flood risk listCO9 1DA: not on the flood risk listCO9 1DB: not on the flood risk listCO9 1DD: not on the flood risk listCO9 1DE: not on the flood risk listCO9 1DF: not on the flood risk listCO9 1DG: not on the flood risk listCO9 1DH: not on the flood risk listCO9 1DJ: not on the flood risk listCO9 1DL: not on the flood risk listCO9 1DN: not on the flood risk listCO9 1DP: not on the flood risk listCO9 1DQ: not on the flood risk listCO9 1DR: not on the flood risk listCO9 1DT: not on the flood risk listCO9 1DU: not on the flood risk listCO9 1DW: not on the flood risk listCO9 1DX: not on the flood risk listCO9 1DY: not on the flood risk listCO9 1DZ: not on the flood risk listCO9 1EB: not on the flood risk listCO9 1ED: not on the flood risk listCO9 1EE: not on the flood risk listCO9 1EF: not on the flood risk listCO9 1EG: not on the flood risk listCO9 1EH: not on the flood risk listCO9 1EJ: not on the flood risk listCO9 1EL: not on the flood risk listCO9 1EN: not on the flood risk listCO9 1EP: not on the flood risk listCO9 1EQ: not on the flood risk listCO9 1ER: not on the flood risk listCO9 1ES: not on the flood risk listCO9 1EU: not on the flood risk listCO9 1EW: not on the flood risk listCO9 1FA: not on the flood risk listCO9 1FG: not on the flood risk listCO9 1FH: not on the flood risk listCO9 1FJ: not on the flood risk listCO9 1FL: not on the flood risk listCO9 1FP: not on the flood risk listCO9 1FR: not on the flood risk listCO9 1FS: not on the flood risk listCO9 1FT: not on the flood risk listCO9 1FU: not on the flood risk listCO9 1FW: not on the flood risk listCO9 1FX: not on the flood risk listCO9 1FY: not on the flood risk listCO9 1GB: not on the flood risk listCO9 1GE: not on the flood risk listCO9 1GF: not on the flood risk listCO9 1GG: not on the flood risk listCO9 1GH: not on the flood risk listCO9 1GJ: not on the flood risk listCO9 1GN: not on the flood risk listCO9 1GQ: not on the flood risk listCO9 1GR: not on the flood risk listCO9 1GS: not on the flood risk listCO9 1GT: not on the flood risk listCO9 1GU: not on the flood risk listCO9 1GW: not on the flood risk listCO9 1GX: not on the flood risk listCO9 1GY: not on the flood risk listCO9 1HG: not on the flood risk listCO9 1HH: not on the flood risk listCO9 1JB: not on the flood risk listCO9 1JH: not on the flood risk listCO9 1JL: not on the flood risk listCO9 1JN: not on the flood risk listCO9 1JP: not on the flood risk listCO9 1JR: not on the flood risk listCO9 1JS: not on the flood risk listCO9 1JT: not on the flood risk listCO9 1JU: not on the flood risk listCO9 1JW: not on the flood risk listCO9 1JX: not on the flood risk listCO9 1JY: not on the flood risk listCO9 1LB: not on the flood risk listCO9 1LD: not on the flood risk listCO9 1LE: not on the flood risk listCO9 1LF: not on the flood risk listCO9 1LJ: not on the flood risk listCO9 1LN: not on the flood risk listCO9 1LP: not on the flood risk listCO9 1LQ: not on the flood risk listCO9 1LR: not on the flood risk listCO9 1LS: not on the flood risk listCO9 1LT: not on the flood risk listCO9 1LU: not on the flood risk listCO9 1LW: not on the flood risk listCO9 1LX: not on the flood risk listCO9 1LY: not on the flood risk listCO9 1LZ: not on the flood risk listCO9 1NA: not on the flood risk listCO9 1NB: not on the flood risk listCO9 1NE: not on the flood risk listCO9 1NF: not on the flood risk listCO9 1NG: not on the flood risk listCO9 1NH: not on the flood risk listCO9 1NJ: not on the flood risk listCO9 1NL: not on the flood risk listCO9 1NN: not on the flood risk listCO9 1NP: not on the flood risk listCO9 1NQ: not on the flood risk listCO9 1NR: not on the flood risk listCO9 1NS: not on the flood risk listCO9 1NT: not on the flood risk listCO9 1NU: not on the flood risk listCO9 1NW: not on the flood risk listCO9 1NY: not on the flood risk listCO9 1NZ: not on the flood risk listCO9 1PA: not on the flood risk listCO9 1PB: not on the flood risk listCO9 1PD: not on the flood risk listCO9 1PE: not on the flood risk listCO9 1PF: not on the flood risk listCO9 1PG: not on the flood risk listCO9 1PH: not on the flood risk listCO9 1PL: not on the flood risk listCO9 1PN: not on the flood risk listCO9 1PP: not on the flood risk listCO9 1PQ: not on the flood risk listCO9 1PS: not on the flood risk listCO9 1PT: not on the flood risk listCO9 1PU: not on the flood risk listCO9 1PZ: not on the flood risk listCO9 1QA: not on the flood risk listCO9 1QB: not on the flood risk listCO9 1QD: not on the flood risk listCO9 1QE: not on the flood risk listCO9 1QF: not on the flood risk listCO9 1QG: not on the flood risk listCO9 1QH: not on the flood risk listCO9 1QJ: not on the flood risk listCO9 1QL: not on the flood risk listCO9 1QN: not on the flood risk listCO9 1QP: not on the flood risk listCO9 1QQ: not on the flood risk listCO9 1QR: not on the flood risk listCO9 1QS: not on the flood risk listCO9 1QU: not on the flood risk listCO9 1QX: not on the flood risk listCO9 1QY: not on the flood risk listCO9 1QZ: not on the flood risk listCO9 1RB: not on the flood risk listCO9 1RD: not on the flood risk listCO9 1RF: not on the flood risk listCO9 1RG: not on the flood risk listCO9 1RH: not on the flood risk listCO9 1RJ: not on the flood risk listCO9 1RL: not on the flood risk listCO9 1RN: not on the flood risk listCO9 1RP: not on the flood risk listCO9 1RQ: not on the flood risk listCO9 1RR: not on the flood risk listCO9 1RS: not on the flood risk listCO9 1RT: not on the flood risk listCO9 1RU: not on the flood risk listCO9 1RX: not on the flood risk listCO9 1RZ: not on the flood risk listCO9 1SA: not on the flood risk listCO9 1SB: not on the flood risk listCO9 1SD: not on the flood risk listCO9 1SE: not on the flood risk listCO9 1SF: not on the flood risk listCO9 1SG: not on the flood risk listCO9 1SH: not on the flood risk listCO9 1SL: not on the flood risk listCO9 1SN: not on the flood risk listCO9 1SP: not on the flood risk listCO9 1SQ: not on the flood risk listCO9 1SR: not on the flood risk listCO9 1SS: not on the flood risk listCO9 1ST: not on the flood risk listCO9 1SU: not on the flood risk listCO9 1SW: not on the flood risk listCO9 1SX: not on the flood risk listCO9 1SY: not on the flood risk listCO9 1TB: not on the flood risk listCO9 1TD: not on the flood risk listCO9 1TF: not on the flood risk listCO9 1TG: not on the flood risk listCO9 1TH: not on the flood risk listCO9 1TJ: not on the flood risk listCO9 1TL: not on the flood risk listCO9 1TN: not on the flood risk listCO9 1TP: not on the flood risk listCO9 1TQ: not on the flood risk listCO9 1TR: not on the flood risk listCO9 1TW: not on the flood risk listCO9 1UA: not on the flood risk listCO9 1UB: not on the flood risk listCO9 1UD: not on the flood risk listCO9 1UF: not on the flood risk listCO9 1UH: not on the flood risk listCO9 1UL: not on the flood risk listCO9 1UP: not on the flood risk listCO9 1UQ: not on the flood risk listCO9 1US: not on the flood risk listCO9 1UU: not on the flood risk listCO9 1UX: not on the flood risk listCO9 1WT: not on the flood risk listCO9 1XA: not on the flood risk listCO9 1XB: not on the flood risk listCO9 1XE: not on the flood risk listCO9 1XG: not on the flood risk listCO9 1YA: not on the flood risk listCO9 1YB: not on the flood risk listCO9 1YD: not on the flood risk listCO9 1YE: not on the flood risk listCO9 1YF: not on the flood risk listCO9 1YG: not on the flood risk listCO9 1HA: low flood risk at worstCO9 1LA: low flood risk at worstCO9 1LL: low flood risk at worstCO9 1PX: low flood risk at worstCO9 1PY: low flood risk at worstCO9 1TU: low flood risk at worstCO9 1UG: low flood risk at worstCO9 1HJ: medium flood risk at worstCO9 1PR: medium flood risk at worstCO9 1ET: high flood riskCO9 1EX: high flood riskCO9 1EZ: high flood riskCO9 1FD: high flood riskCO9 1HB: high flood riskCO9 1HR: high flood riskCO9 1HT: high flood riskCO9 1HW: high flood riskCO9 1JA: high flood riskCO9 1JD: high flood riskCO9 1JQ: high flood riskCO9 1JZ: high flood riskCO9 1XR: high flood risk Halstead 12 postcodes at high or medium risk, outlined: this goes to CO9 1HT, the one with most homes and businesses at high risk12 postcodes at high or medium risk Map of every postcode in the CO9 1 sector, by flood risk Of the 293 postcodes in the CO9 1 sector that ONS places, 14 have a home or business at high risk, 3 are at medium risk at worst, 7 are at low risk at worst and 269 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 12 postcodes at high or medium risk. Places named: Halstead. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. Halstead
  • A home or business at high risk: 14
  • At medium risk at worst: 3
  • At low risk at worst: 7
  • At very low risk only: 0
  • Not on the at-risk list: 269
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 293 postcodes in the CO9 1 sector that ONS places, 14 have a home or business at high risk, 3 are at medium risk at worst, 7 are at low risk at worst and 269 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 160 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

14 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

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

CO9 1HT28 at high riskCO9 1EX14 at high riskCO9 1HB7 at high riskCO9 1ET3 at high riskCO9 1FD2 at high riskCO9 1JD2 at high riskCO9 1HU1 at high riskCO9 1HR1 at high riskCO9 1JA1 at high riskCO9 1XR1 at high riskCO9 1EZ1 at high riskCO9 1HW1 at high risk

Where the postcodes at high or medium risk lie together

  • 12 postcodes at high or medium risk, outlined on the map. CO9 1HT, is the one with most homes and businesses at high risk.

What do homes sell for in CO9 1?

Homes in CO9 1 sold for a typical £307,500 in the 12 months to August 2026, across 120 sales, down 9.6% on the 12 months before, HM Land Registry's figures show.

£307,500 typical price, the 12 months to August 2026
£340,000 12 months to August 2025
▼ down 9.6% on the 12 months before
  • Detached £452,500 36 sales
  • Semi-detached £312,500 36 sales
  • Terraced £252,500 32 sales
  • Flat or maisonette £107,500 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 CO9 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 CO9 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.

CO9 1AACO9 1ABCO9 1ADCO9 1AECO9 1AFCO9 1AGCO9 1AHCO9 1AJCO9 1ALCO9 1ANCO9 1APCO9 1AQCO9 1ARCO9 1ASCO9 1ATCO9 1AUCO9 1AWCO9 1AXCO9 1AYCO9 1AZCO9 1BACO9 1BBCO9 1BDCO9 1BECO9 1BGCO9 1BHCO9 1BJCO9 1BLCO9 1BNCO9 1BPCO9 1BQCO9 1BSCO9 1BTCO9 1BUCO9 1BWCO9 1BXCO9 1BYCO9 1BZCO9 1DACO9 1DBCO9 1DDCO9 1DECO9 1DFCO9 1DGCO9 1DHCO9 1DJCO9 1DLCO9 1DNCO9 1DPCO9 1DQCO9 1DRCO9 1DSCO9 1DTCO9 1DUCO9 1DWCO9 1DXCO9 1DYCO9 1DZCO9 1EACO9 1EBCO9 1EDCO9 1EECO9 1EFCO9 1EGCO9 1EHCO9 1EJCO9 1ELCO9 1ENCO9 1EPCO9 1EQCO9 1ERCO9 1ESCO9 1ETCO9 1EUCO9 1EWCO9 1EXCO9 1EZCO9 1FACO9 1FDCO9 1FGCO9 1FHCO9 1FJCO9 1FLCO9 1FPCO9 1FRCO9 1FSCO9 1FTCO9 1FUCO9 1FWCO9 1FXCO9 1FYCO9 1FZCO9 1GBCO9 1GDCO9 1GECO9 1GFCO9 1GGCO9 1GHCO9 1GJCO9 1GNCO9 1GPCO9 1GQCO9 1GRCO9 1GSCO9 1GTCO9 1GUCO9 1GWCO9 1GXCO9 1GYCO9 1GZCO9 1HACO9 1HBCO9 1HFCO9 1HGCO9 1HHCO9 1HJCO9 1HRCO9 1HTCO9 1HUCO9 1HWCO9 1HYCO9 1HZCO9 1JACO9 1JBCO9 1JDCO9 1JECO9 1JHCO9 1JJCO9 1JLCO9 1JNCO9 1JPCO9 1JQCO9 1JRCO9 1JSCO9 1JTCO9 1JUCO9 1JWCO9 1JXCO9 1JYCO9 1JZCO9 1LACO9 1LBCO9 1LDCO9 1LECO9 1LFCO9 1LGCO9 1LHCO9 1LJCO9 1LLCO9 1LNCO9 1LPCO9 1LQCO9 1LRCO9 1LSCO9 1LTCO9 1LUCO9 1LWCO9 1LXCO9 1LYCO9 1LZCO9 1NACO9 1NBCO9 1NDCO9 1NECO9 1NFCO9 1NGCO9 1NHCO9 1NJCO9 1NLCO9 1NNCO9 1NPCO9 1NQCO9 1NRCO9 1NSCO9 1NTCO9 1NUCO9 1NWCO9 1NXCO9 1NYCO9 1NZCO9 1PACO9 1PBCO9 1PDCO9 1PECO9 1PFCO9 1PGCO9 1PHCO9 1PJCO9 1PLCO9 1PNCO9 1PPCO9 1PQCO9 1PRCO9 1PSCO9 1PTCO9 1PUCO9 1PWCO9 1PXCO9 1PYCO9 1PZCO9 1QACO9 1QBCO9 1QDCO9 1QECO9 1QFCO9 1QGCO9 1QHCO9 1QJCO9 1QLCO9 1QNCO9 1QPCO9 1QQCO9 1QRCO9 1QSCO9 1QTCO9 1QUCO9 1QXCO9 1QYCO9 1QZCO9 1RACO9 1RBCO9 1RDCO9 1RFCO9 1RGCO9 1RHCO9 1RJCO9 1RLCO9 1RNCO9 1RPCO9 1RQCO9 1RRCO9 1RSCO9 1RTCO9 1RUCO9 1RXCO9 1RZCO9 1SACO9 1SBCO9 1SDCO9 1SECO9 1SFCO9 1SGCO9 1SHCO9 1SLCO9 1SNCO9 1SPCO9 1SQCO9 1SRCO9 1SSCO9 1STCO9 1SUCO9 1SWCO9 1SXCO9 1SYCO9 1TBCO9 1TDCO9 1TFCO9 1TGCO9 1THCO9 1TJCO9 1TLCO9 1TNCO9 1TPCO9 1TQCO9 1TRCO9 1TUCO9 1TWCO9 1UACO9 1UBCO9 1UDCO9 1UFCO9 1UGCO9 1UHCO9 1ULCO9 1UPCO9 1UQCO9 1USCO9 1UTCO9 1UUCO9 1UXCO9 1UYCO9 1WTCO9 1XACO9 1XBCO9 1XECO9 1XGCO9 1XRCO9 1YACO9 1YBCO9 1YDCO9 1YECO9 1YFCO9 1YG

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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