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, and which are new since 2020

Map of every postcode in the CO9 3 sector, by new since 2020 Of the 194 postcodes in the CO9 3 sector that ONS places, 3 are new since 2020 and 191 were in use before 2020. 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: before 2020CO9 3AB: before 2020CO9 3AD: before 2020CO9 3AE: before 2020CO9 3AG: before 2020CO9 3AH: before 2020CO9 3AJ: before 2020CO9 3AL: before 2020CO9 3AN: before 2020CO9 3AP: before 2020CO9 3AR: before 2020CO9 3AS: before 2020CO9 3AT: before 2020CO9 3AU: before 2020CO9 3AX: before 2020CO9 3AZ: before 2020CO9 3BA: before 2020CO9 3BB: before 2020CO9 3BD: before 2020CO9 3BE: before 2020CO9 3BG: before 2020CO9 3BH: before 2020CO9 3BJ: before 2020CO9 3BL: before 2020CO9 3BN: before 2020CO9 3BP: before 2020CO9 3BQ: before 2020CO9 3BS: before 2020CO9 3BW: before 2020CO9 3BX: before 2020CO9 3BY: before 2020CO9 3BZ: before 2020CO9 3DA: before 2020CO9 3DB: before 2020CO9 3DD: before 2020CO9 3DE: before 2020CO9 3DF: before 2020CO9 3DG: before 2020CO9 3DJ: before 2020CO9 3DN: before 2020CO9 3DP: before 2020CO9 3DQ: before 2020CO9 3DR: before 2020CO9 3DS: before 2020CO9 3DT: before 2020CO9 3DU: before 2020CO9 3DW: before 2020CO9 3DX: before 2020CO9 3DY: before 2020CO9 3DZ: before 2020CO9 3EA: before 2020CO9 3EB: before 2020CO9 3ED: before 2020CO9 3EE: before 2020CO9 3EG: before 2020CO9 3EH: before 2020CO9 3EQ: before 2020CO9 3EU: before 2020CO9 3EW: before 2020CO9 3EX: before 2020CO9 3EY: before 2020CO9 3FA: before 2020CO9 3FE: before 2020CO9 3FF: before 2020CO9 3FH: before 2020CO9 3FJ: before 2020CO9 3FL: before 2020CO9 3FP: before 2020CO9 3FQ: before 2020CO9 3HA: before 2020CO9 3HB: before 2020CO9 3HD: before 2020CO9 3HG: before 2020CO9 3HH: before 2020CO9 3HJ: before 2020CO9 3HL: before 2020CO9 3HP: before 2020CO9 3HS: before 2020CO9 3HT: before 2020CO9 3HX: before 2020CO9 3HY: before 2020CO9 3HZ: before 2020CO9 3JB: before 2020CO9 3JD: before 2020CO9 3JE: before 2020CO9 3JG: before 2020CO9 3JH: before 2020CO9 3JJ: before 2020CO9 3JL: before 2020CO9 3JN: before 2020CO9 3JP: before 2020CO9 3JR: before 2020CO9 3JS: before 2020CO9 3JT: before 2020CO9 3JU: before 2020CO9 3JW: before 2020CO9 3JX: before 2020CO9 3JZ: before 2020CO9 3LA: before 2020CO9 3LB: before 2020CO9 3LD: before 2020CO9 3LE: before 2020CO9 3LG: before 2020CO9 3LH: before 2020CO9 3LJ: before 2020CO9 3LL: before 2020CO9 3LN: before 2020CO9 3LP: before 2020CO9 3LR: before 2020CO9 3LS: before 2020CO9 3LT: before 2020CO9 3LU: before 2020CO9 3LX: before 2020CO9 3LZ: before 2020CO9 3NA: before 2020CO9 3ND: before 2020CO9 3NF: before 2020CO9 3NG: before 2020CO9 3NJ: before 2020CO9 3NL: before 2020CO9 3NN: before 2020CO9 3NP: before 2020CO9 3NR: before 2020CO9 3NS: before 2020CO9 3NT: before 2020CO9 3NU: before 2020CO9 3NX: before 2020CO9 3NY: before 2020CO9 3NZ: before 2020CO9 3PD: before 2020CO9 3PE: before 2020CO9 3PG: before 2020CO9 3PH: before 2020CO9 3PJ: before 2020CO9 3PL: before 2020CO9 3PP: before 2020CO9 3PS: before 2020CO9 3PT: before 2020CO9 3PU: before 2020CO9 3PX: before 2020CO9 3PY: before 2020CO9 3PZ: before 2020CO9 3QA: before 2020CO9 3QB: before 2020CO9 3QD: before 2020CO9 3QF: before 2020CO9 3QG: before 2020CO9 3QH: before 2020CO9 3QJ: before 2020CO9 3QL: before 2020CO9 3QN: before 2020CO9 3QP: before 2020CO9 3QQ: before 2020CO9 3QS: before 2020CO9 3QW: before 2020CO9 3QX: before 2020CO9 3RA: before 2020CO9 3RB: before 2020CO9 3RD: before 2020CO9 3RE: before 2020CO9 3RG: before 2020CO9 3RH: before 2020CO9 3RJ: before 2020CO9 3RL: before 2020CO9 3RN: before 2020CO9 3RP: before 2020CO9 3RR: before 2020CO9 3RS: before 2020CO9 3RT: before 2020CO9 3RX: before 2020CO9 3RY: before 2020CO9 3SA: before 2020CO9 3SW: before 2020CO9 3JA: before 2020CO9 3FN: new since 2020CO9 3FS: new since 2020CO9 3YZ: new since 2020 Sible HedinghamGreat Yeldham Map of every postcode in the CO9 3 sector, by new since 2020 Of the 194 postcodes in the CO9 3 sector that ONS places, 3 are new since 2020 and 191 were in use before 2020. 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
  • New since 2020: 3
  • In use before 2020: 191

Of the 194 postcodes in the CO9 3 sector that ONS places, 3 are new since 2020 and 191 were in use before 2020.

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. New since 2020 means it came into use in January 2020 or later. 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; when each came into use: the same directory; 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 3 newest postcodes

CO9 3FNFebruary 2026CO9 3FSFebruary 2025CO9 3YZFebruary 2025

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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