CO9 3 postcode sector in the CO9 district

CO9 3 is a sector of the CO9 district: every postcode that starts CO9 3. It has 194 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 3 sector, by flood risk

Map of every postcode in the CO9 3 sector, by flood risk Of the 194 postcodes in the CO9 3 sector that ONS places, 13 have a home or business at high risk, 2 are at medium risk at worst, 11 are at low risk at worst and 168 are not on the Environment Agency's at-risk list. Places named: Sible Hedingham, Great Yeldham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. CO9 3AA: not on the flood risk listCO9 3AB: not on the flood risk listCO9 3AD: not on the flood risk listCO9 3AE: not on the flood risk listCO9 3AG: not on the flood risk listCO9 3AH: not on the flood risk listCO9 3AJ: not on the flood risk listCO9 3AP: not on the flood risk listCO9 3AR: not on the flood risk listCO9 3AS: not on the flood risk listCO9 3AT: not on the flood risk listCO9 3AU: not on the flood risk listCO9 3AX: not on the flood risk listCO9 3AZ: not on the flood risk listCO9 3BA: not on the flood risk listCO9 3BB: not on the flood risk listCO9 3BD: not on the flood risk listCO9 3BE: not on the flood risk listCO9 3BG: not on the flood risk listCO9 3BH: not on the flood risk listCO9 3BJ: not on the flood risk listCO9 3BN: not on the flood risk listCO9 3BP: not on the flood risk listCO9 3BQ: not on the flood risk listCO9 3BS: not on the flood risk listCO9 3BW: not on the flood risk listCO9 3BX: not on the flood risk listCO9 3BY: not on the flood risk listCO9 3BZ: not on the flood risk listCO9 3DA: not on the flood risk listCO9 3DD: not on the flood risk listCO9 3DE: not on the flood risk listCO9 3DF: not on the flood risk listCO9 3DG: not on the flood risk listCO9 3DJ: not on the flood risk listCO9 3DN: not on the flood risk listCO9 3DQ: not on the flood risk listCO9 3DT: not on the flood risk listCO9 3DU: not on the flood risk listCO9 3DW: not on the flood risk listCO9 3DX: not on the flood risk listCO9 3EA: not on the flood risk listCO9 3EB: not on the flood risk listCO9 3EE: not on the flood risk listCO9 3EG: not on the flood risk listCO9 3EH: not on the flood risk listCO9 3EN: not on the flood risk listCO9 3EQ: not on the flood risk listCO9 3EU: not on the flood risk listCO9 3EW: not on the flood risk listCO9 3EX: not on the flood risk listCO9 3EY: not on the flood risk listCO9 3FA: not on the flood risk listCO9 3FE: not on the flood risk listCO9 3FF: not on the flood risk listCO9 3FH: not on the flood risk listCO9 3FJ: not on the flood risk listCO9 3FL: not on the flood risk listCO9 3FP: not on the flood risk listCO9 3FQ: not on the flood risk listCO9 3HB: not on the flood risk listCO9 3HG: not on the flood risk listCO9 3HH: not on the flood risk listCO9 3HJ: not on the flood risk listCO9 3HL: not on the flood risk listCO9 3HP: not on the flood risk listCO9 3HT: not on the flood risk listCO9 3HZ: not on the flood risk listCO9 3JB: not on the flood risk listCO9 3JD: not on the flood risk listCO9 3JE: not on the flood risk listCO9 3JG: not on the flood risk listCO9 3JH: not on the flood risk listCO9 3JJ: not on the flood risk listCO9 3JL: not on the flood risk listCO9 3JN: not on the flood risk listCO9 3JP: not on the flood risk listCO9 3JR: not on the flood risk listCO9 3JS: not on the flood risk listCO9 3JT: not on the flood risk listCO9 3JU: not on the flood risk listCO9 3JW: not on the flood risk listCO9 3JX: not on the flood risk listCO9 3JZ: not on the flood risk listCO9 3LA: not on the flood risk listCO9 3LB: not on the flood risk listCO9 3LD: not on the flood risk listCO9 3LE: not on the flood risk listCO9 3LG: not on the flood risk listCO9 3LJ: not on the flood risk listCO9 3LL: not on the flood risk listCO9 3LN: not on the flood risk listCO9 3LP: not on the flood risk listCO9 3LR: not on the flood risk listCO9 3LS: not on the flood risk listCO9 3LT: not on the flood risk listCO9 3LU: not on the flood risk listCO9 3LX: not on the flood risk listCO9 3LZ: not on the flood risk listCO9 3NA: not on the flood risk listCO9 3ND: not on the flood risk listCO9 3NF: not on the flood risk listCO9 3NG: not on the flood risk listCO9 3NJ: not on the flood risk listCO9 3NL: not on the flood risk listCO9 3NN: not on the flood risk listCO9 3NP: not on the flood risk listCO9 3NR: not on the flood risk listCO9 3NT: not on the flood risk listCO9 3NX: not on the flood risk listCO9 3NY: not on the flood risk listCO9 3NZ: not on the flood risk listCO9 3PD: not on the flood risk listCO9 3PE: not on the flood risk listCO9 3PG: not on the flood risk listCO9 3PH: not on the flood risk listCO9 3PJ: not on the flood risk listCO9 3PL: not on the flood risk listCO9 3PP: not on the flood risk listCO9 3PR: not on the flood risk listCO9 3PS: not on the flood risk listCO9 3PT: not on the flood risk listCO9 3PU: not on the flood risk listCO9 3PX: not on the flood risk listCO9 3PY: not on the flood risk listCO9 3PZ: not on the flood risk listCO9 3QB: not on the flood risk listCO9 3QF: not on the flood risk listCO9 3QG: not on the flood risk listCO9 3QJ: not on the flood risk listCO9 3QL: not on the flood risk listCO9 3QN: not on the flood risk listCO9 3QP: not on the flood risk listCO9 3QQ: not on the flood risk listCO9 3QS: not on the flood risk listCO9 3QW: not on the flood risk listCO9 3QX: not on the flood risk listCO9 3RA: not on the flood risk listCO9 3RD: not on the flood risk listCO9 3RG: not on the flood risk listCO9 3RJ: not on the flood risk listCO9 3RL: not on the flood risk listCO9 3RN: not on the flood risk listCO9 3RP: not on the flood risk listCO9 3RR: not on the flood risk listCO9 3RS: not on the flood risk listCO9 3RT: not on the flood risk listCO9 3RX: not on the flood risk listCO9 3RY: not on the flood risk listCO9 3SA: not on the flood risk listCO9 3SW: not on the flood risk listCO9 3AN: low flood risk at worstCO9 3BL: low flood risk at worstCO9 3DB: low flood risk at worstCO9 3DY: low flood risk at worstCO9 3DZ: low flood risk at worstCO9 3FN: low flood risk at worstCO9 3HD: low flood risk at worstCO9 3HS: low flood risk at worstCO9 3LH: low flood risk at worstCO9 3NU: low flood risk at worstCO9 3QD: low flood risk at worstCO9 3DS: medium flood risk at worstCO9 3QA: medium flood risk at worstCO9 3AL: high flood riskCO9 3DP: high flood riskCO9 3DR: high flood riskCO9 3ED: high flood riskCO9 3HA: high flood riskCO9 3HX: high flood riskCO9 3HY: high flood riskCO9 3SB: high flood riskCO9 3NS: high flood riskCO9 3QH: high flood riskCO9 3RB: high flood riskCO9 3RE: high flood riskCO9 3RH: high flood risk Sible HedinghamGreat Yeldham Map of every postcode in the CO9 3 sector, by flood risk Of the 194 postcodes in the CO9 3 sector that ONS places, 13 have a home or business at high risk, 2 are at medium risk at worst, 11 are at low risk at worst and 168 are not on the Environment Agency's at-risk list. Places named: Sible Hedingham, Great Yeldham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. Sible HedinghamGreat Yeldham
  • A home or business at high risk: 13
  • At medium risk at worst: 2
  • At low risk at worst: 11
  • At very low risk only: 0
  • Not on the at-risk list: 168

Of the 194 postcodes in the CO9 3 sector that ONS places, 13 have a home or business at high risk, 2 are at medium risk at worst, 11 are at low risk at worst and 168 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

13 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 3HX6 at high riskCO9 3HA5 at high riskCO9 3AL4 at high riskCO9 3SB2 at high riskCO9 3ED2 at high riskCO9 3QH2 at high riskCO9 3RH1 at high riskCO9 3DR1 at high riskCO9 3DP1 at high riskCO9 3HY1 at high riskCO9 3NS1 at high riskCO9 3RB1 at high risk

What do homes sell for in CO9 3?

Homes in CO9 3 sold for a typical £315,000 in the 12 months to August 2026, across 64 sales, down 13.1% on the 12 months before, HM Land Registry's figures show.

£315,000 typical price, the 12 months to August 2026
£362,500 12 months to August 2025
▼ down 13.1% on the 12 months before
  • Detached £471,500 20 sales
  • Semi-detached £310,500 20 sales
  • Terraced £269,000 20 sales
  • Flat or maisonette 4 sales, too few to price

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 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 CO9 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.

CO9 3AACO9 3ABCO9 3ADCO9 3AECO9 3AGCO9 3AHCO9 3AJCO9 3ALCO9 3ANCO9 3APCO9 3ARCO9 3ASCO9 3ATCO9 3AUCO9 3AXCO9 3AZCO9 3BACO9 3BBCO9 3BDCO9 3BECO9 3BGCO9 3BHCO9 3BJCO9 3BLCO9 3BNCO9 3BPCO9 3BQCO9 3BSCO9 3BTCO9 3BWCO9 3BXCO9 3BYCO9 3BZCO9 3DACO9 3DBCO9 3DDCO9 3DECO9 3DFCO9 3DGCO9 3DHCO9 3DJCO9 3DLCO9 3DNCO9 3DPCO9 3DQCO9 3DRCO9 3DSCO9 3DTCO9 3DUCO9 3DWCO9 3DXCO9 3DYCO9 3DZCO9 3EACO9 3EBCO9 3EDCO9 3EECO9 3EGCO9 3EHCO9 3EJCO9 3ENCO9 3EQCO9 3ERCO9 3EUCO9 3EWCO9 3EXCO9 3EYCO9 3EZCO9 3FACO9 3FDCO9 3FECO9 3FFCO9 3FGCO9 3FHCO9 3FJCO9 3FLCO9 3FNCO9 3FPCO9 3FQCO9 3FSCO9 3HACO9 3HBCO9 3HDCO9 3HECO9 3HGCO9 3HHCO9 3HJCO9 3HLCO9 3HPCO9 3HSCO9 3HTCO9 3HXCO9 3HYCO9 3HZCO9 3JACO9 3JBCO9 3JDCO9 3JECO9 3JGCO9 3JHCO9 3JJCO9 3JLCO9 3JNCO9 3JPCO9 3JRCO9 3JSCO9 3JTCO9 3JUCO9 3JWCO9 3JXCO9 3JZCO9 3LACO9 3LBCO9 3LDCO9 3LECO9 3LGCO9 3LHCO9 3LJCO9 3LLCO9 3LNCO9 3LPCO9 3LRCO9 3LSCO9 3LTCO9 3LUCO9 3LXCO9 3LZCO9 3NACO9 3NDCO9 3NECO9 3NFCO9 3NGCO9 3NJCO9 3NLCO9 3NNCO9 3NPCO9 3NRCO9 3NSCO9 3NTCO9 3NUCO9 3NXCO9 3NYCO9 3NZCO9 3PACO9 3PBCO9 3PDCO9 3PECO9 3PGCO9 3PHCO9 3PJCO9 3PLCO9 3PPCO9 3PRCO9 3PSCO9 3PTCO9 3PUCO9 3PXCO9 3PYCO9 3PZCO9 3QACO9 3QBCO9 3QDCO9 3QECO9 3QFCO9 3QGCO9 3QHCO9 3QJCO9 3QLCO9 3QNCO9 3QPCO9 3QQCO9 3QSCO9 3QTCO9 3QWCO9 3QXCO9 3RACO9 3RBCO9 3RDCO9 3RECO9 3RGCO9 3RHCO9 3RJCO9 3RLCO9 3RNCO9 3RPCO9 3RRCO9 3RSCO9 3RTCO9 3RXCO9 3RYCO9 3SACO9 3SBCO9 3SWCO9 3YZ

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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