CM3 1 postcode sector in the CM3 district

CM3 1 is a sector of the CM3 district: every postcode that starts CM3 1. It has 215 postcodes in use.

Not sure what a sector is? UK postcode format explained.

Every postcode in the CM3 1 sector, by flood risk

Map of every postcode in the CM3 1 sector, by flood risk Of the 215 postcodes in the CM3 1 sector that ONS places, 7 have a home or business at high risk, 4 are at medium risk at worst, 2 are at low risk at worst, 1 are at very low risk only and 201 are not on the Environment Agency's at-risk list. Places named: Great Notley. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. A131 CM3 1AA: not on the flood risk listCM3 1AB: not on the flood risk listCM3 1AD: not on the flood risk listCM3 1AE: not on the flood risk listCM3 1AF: not on the flood risk listCM3 1AJ: not on the flood risk listCM3 1AL: not on the flood risk listCM3 1AN: not on the flood risk listCM3 1AR: not on the flood risk listCM3 1AU: not on the flood risk listCM3 1AW: not on the flood risk listCM3 1AX: not on the flood risk listCM3 1AY: not on the flood risk listCM3 1AZ: not on the flood risk listCM3 1BA: not on the flood risk listCM3 1BD: not on the flood risk listCM3 1BE: not on the flood risk listCM3 1BJ: not on the flood risk listCM3 1BL: not on the flood risk listCM3 1BQ: not on the flood risk listCM3 1BU: not on the flood risk listCM3 1BW: not on the flood risk listCM3 1BX: not on the flood risk listCM3 1BY: not on the flood risk listCM3 1BZ: not on the flood risk listCM3 1DB: not on the flood risk listCM3 1DD: not on the flood risk listCM3 1DE: not on the flood risk listCM3 1DF: not on the flood risk listCM3 1DG: not on the flood risk listCM3 1DH: not on the flood risk listCM3 1DJ: not on the flood risk listCM3 1DP: not on the flood risk listCM3 1DR: not on the flood risk listCM3 1DS: not on the flood risk listCM3 1DT: not on the flood risk listCM3 1DZ: not on the flood risk listCM3 1EA: not on the flood risk listCM3 1EB: not on the flood risk listCM3 1ED: not on the flood risk listCM3 1EE: not on the flood risk listCM3 1EF: not on the flood risk listCM3 1EG: not on the flood risk listCM3 1EH: not on the flood risk listCM3 1EJ: not on the flood risk listCM3 1EL: not on the flood risk listCM3 1EN: not on the flood risk listCM3 1EP: not on the flood risk listCM3 1ER: not on the flood risk listCM3 1ES: not on the flood risk listCM3 1ET: not on the flood risk listCM3 1EU: not on the flood risk listCM3 1EW: not on the flood risk listCM3 1EX: not on the flood risk listCM3 1FA: not on the flood risk listCM3 1FD: not on the flood risk listCM3 1FE: not on the flood risk listCM3 1FF: not on the flood risk listCM3 1FJ: not on the flood risk listCM3 1FL: not on the flood risk listCM3 1FN: not on the flood risk listCM3 1FQ: not on the flood risk listCM3 1FS: not on the flood risk listCM3 1FX: not on the flood risk listCM3 1GS: not on the flood risk listCM3 1GT: not on the flood risk listCM3 1GU: not on the flood risk listCM3 1GX: not on the flood risk listCM3 1GY: not on the flood risk listCM3 1HA: not on the flood risk listCM3 1HB: not on the flood risk listCM3 1HE: not on the flood risk listCM3 1HF: not on the flood risk listCM3 1HG: not on the flood risk listCM3 1HH: not on the flood risk listCM3 1HL: not on the flood risk listCM3 1HN: not on the flood risk listCM3 1HP: not on the flood risk listCM3 1HQ: not on the flood risk listCM3 1HR: not on the flood risk listCM3 1HS: not on the flood risk listCM3 1HT: not on the flood risk listCM3 1HU: not on the flood risk listCM3 1HW: not on the flood risk listCM3 1HX: not on the flood risk listCM3 1HY: not on the flood risk listCM3 1HZ: not on the flood risk listCM3 1JA: not on the flood risk listCM3 1JB: not on the flood risk listCM3 1JD: not on the flood risk listCM3 1JE: not on the flood risk listCM3 1JF: not on the flood risk listCM3 1JG: not on the flood risk listCM3 1JH: not on the flood risk listCM3 1JQ: not on the flood risk listCM3 1JR: not on the flood risk listCM3 1JS: not on the flood risk listCM3 1JW: not on the flood risk listCM3 1JY: not on the flood risk listCM3 1LA: not on the flood risk listCM3 1LB: not on the flood risk listCM3 1LD: not on the flood risk listCM3 1LE: not on the flood risk listCM3 1LF: not on the flood risk listCM3 1LG: not on the flood risk listCM3 1LH: not on the flood risk listCM3 1LJ: not on the flood risk listCM3 1LN: not on the flood risk listCM3 1LP: not on the flood risk listCM3 1LQ: not on the flood risk listCM3 1LW: not on the flood risk listCM3 1LX: not on the flood risk listCM3 1LY: not on the flood risk listCM3 1LZ: not on the flood risk listCM3 1NB: not on the flood risk listCM3 1NF: not on the flood risk listCM3 1NG: not on the flood risk listCM3 1NH: not on the flood risk listCM3 1NL: not on the flood risk listCM3 1NN: not on the flood risk listCM3 1NP: not on the flood risk listCM3 1NQ: not on the flood risk listCM3 1NR: not on the flood risk listCM3 1NU: not on the flood risk listCM3 1NW: not on the flood risk listCM3 1NX: not on the flood risk listCM3 1PA: not on the flood risk listCM3 1PB: not on the flood risk listCM3 1PD: not on the flood risk listCM3 1PE: not on the flood risk listCM3 1PF: not on the flood risk listCM3 1PG: not on the flood risk listCM3 1PH: not on the flood risk listCM3 1PJ: not on the flood risk listCM3 1PL: not on the flood risk listCM3 1PN: not on the flood risk listCM3 1PP: not on the flood risk listCM3 1PQ: not on the flood risk listCM3 1PR: not on the flood risk listCM3 1PS: not on the flood risk listCM3 1PT: not on the flood risk listCM3 1PU: not on the flood risk listCM3 1PW: not on the flood risk listCM3 1PX: not on the flood risk listCM3 1PY: not on the flood risk listCM3 1PZ: not on the flood risk listCM3 1QA: not on the flood risk listCM3 1QB: not on the flood risk listCM3 1QD: not on the flood risk listCM3 1QE: not on the flood risk listCM3 1QF: not on the flood risk listCM3 1QG: not on the flood risk listCM3 1QH: not on the flood risk listCM3 1QJ: not on the flood risk listCM3 1QL: not on the flood risk listCM3 1QN: not on the flood risk listCM3 1QP: not on the flood risk listCM3 1QQ: not on the flood risk listCM3 1QR: not on the flood risk listCM3 1QW: not on the flood risk listCM3 1QX: not on the flood risk listCM3 1RA: not on the flood risk listCM3 1RB: not on the flood risk listCM3 1RD: not on the flood risk listCM3 1RE: not on the flood risk listCM3 1RP: not on the flood risk listCM3 1RR: not on the flood risk listCM3 1RS: not on the flood risk listCM3 1RT: not on the flood risk listCM3 1RU: not on the flood risk listCM3 1RX: not on the flood risk listCM3 1SG: not on the flood risk listCM3 1SH: not on the flood risk listCM3 1TG: not on the flood risk listCM3 1JZ: very low flood risk onlyCM3 1BS: low flood risk at worstCM3 1LL: low flood risk at worstCM3 1AG: medium flood risk at worstCM3 1JP: medium flood risk at worstCM3 1ND: medium flood risk at worstCM3 1AH: high flood riskCM3 1AQ: high flood riskCM3 1AS: high flood riskCM3 1BG: high flood riskCM3 1BP: high flood riskCM3 1BT: high flood riskCM3 1FH: high flood risk Great Notley Map of every postcode in the CM3 1 sector, by flood risk Of the 215 postcodes in the CM3 1 sector that ONS places, 7 have a home or business at high risk, 4 are at medium risk at worst, 2 are at low risk at worst, 1 are at very low risk only and 201 are not on the Environment Agency's at-risk list. Places named: Broomfield and The Walthams, Boreham and The Leighs. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. Broomfield and The WalthamsBoreham and The Leighs
  • A home or business at high risk: 7
  • At medium risk at worst: 4
  • At low risk at worst: 2
  • At very low risk only: 1
  • Not on the at-risk list: 201

Of the 215 postcodes in the CM3 1 sector that ONS places, 7 have a home or business at high risk, 4 are at medium risk at worst, 2 are at low risk at worst, 1 are at very low risk only and 201 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. 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.

CM3 1AQ2 at high riskCM3 1BG2 at high riskCM3 1BT1 at high riskCM3 1FH1 at high riskCM3 1AH1 at high riskCM3 1AS1 at high riskCM3 1BP1 at high risk

What do homes sell for in CM3 1?

Homes in CM3 1 sold for a typical £480,000 in the 12 months to August 2026, across 52 sales, down 7% on the 12 months before, HM Land Registry's figures show.

£480,000 typical price, the 12 months to August 2026
£516,250 12 months to August 2025
▼ down 7% on the 12 months before
  • Detached £603,250 26 sales
  • Semi-detached £470,000 15 sales
  • Terraced £377,500 8 sales
  • Flat or maisonette 3 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 CM3 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 CM3 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.

CM3 1AACM3 1ABCM3 1ADCM3 1AECM3 1AFCM3 1AGCM3 1AHCM3 1AJCM3 1ALCM3 1ANCM3 1APCM3 1AQCM3 1ARCM3 1ASCM3 1ATCM3 1AUCM3 1AWCM3 1AXCM3 1AYCM3 1AZCM3 1BACM3 1BDCM3 1BECM3 1BGCM3 1BJCM3 1BLCM3 1BNCM3 1BPCM3 1BQCM3 1BSCM3 1BTCM3 1BUCM3 1BWCM3 1BXCM3 1BYCM3 1BZCM3 1DACM3 1DBCM3 1DDCM3 1DECM3 1DFCM3 1DGCM3 1DHCM3 1DJCM3 1DPCM3 1DQCM3 1DRCM3 1DSCM3 1DTCM3 1DXCM3 1DZCM3 1EACM3 1EBCM3 1EDCM3 1EECM3 1EFCM3 1EGCM3 1EHCM3 1EJCM3 1ELCM3 1ENCM3 1EPCM3 1EQCM3 1ERCM3 1ESCM3 1ETCM3 1EUCM3 1EWCM3 1EXCM3 1FACM3 1FDCM3 1FECM3 1FFCM3 1FHCM3 1FJCM3 1FLCM3 1FNCM3 1FPCM3 1FQCM3 1FRCM3 1FSCM3 1FTCM3 1FXCM3 1GSCM3 1GTCM3 1GUCM3 1GXCM3 1GYCM3 1GZCM3 1HACM3 1HBCM3 1HDCM3 1HECM3 1HFCM3 1HGCM3 1HHCM3 1HJCM3 1HLCM3 1HNCM3 1HPCM3 1HQCM3 1HRCM3 1HSCM3 1HTCM3 1HUCM3 1HWCM3 1HXCM3 1HYCM3 1HZCM3 1JACM3 1JBCM3 1JDCM3 1JECM3 1JFCM3 1JGCM3 1JHCM3 1JJCM3 1JLCM3 1JNCM3 1JPCM3 1JQCM3 1JRCM3 1JSCM3 1JTCM3 1JUCM3 1JWCM3 1JXCM3 1JYCM3 1JZCM3 1LACM3 1LBCM3 1LDCM3 1LECM3 1LFCM3 1LGCM3 1LHCM3 1LJCM3 1LLCM3 1LNCM3 1LPCM3 1LQCM3 1LTCM3 1LWCM3 1LXCM3 1LYCM3 1LZCM3 1NACM3 1NBCM3 1NDCM3 1NECM3 1NFCM3 1NGCM3 1NHCM3 1NJCM3 1NLCM3 1NNCM3 1NPCM3 1NQCM3 1NRCM3 1NSCM3 1NTCM3 1NUCM3 1NWCM3 1NXCM3 1NYCM3 1NZCM3 1PACM3 1PBCM3 1PDCM3 1PECM3 1PFCM3 1PGCM3 1PHCM3 1PJCM3 1PLCM3 1PNCM3 1PPCM3 1PQCM3 1PRCM3 1PSCM3 1PTCM3 1PUCM3 1PWCM3 1PXCM3 1PYCM3 1PZCM3 1QACM3 1QBCM3 1QDCM3 1QECM3 1QFCM3 1QGCM3 1QHCM3 1QJCM3 1QLCM3 1QNCM3 1QPCM3 1QQCM3 1QRCM3 1QSCM3 1QWCM3 1QXCM3 1RACM3 1RBCM3 1RDCM3 1RECM3 1RPCM3 1RRCM3 1RSCM3 1RTCM3 1RUCM3 1RXCM3 1SGCM3 1SHCM3 1TG

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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