CM11 1 postcode sector in the CM11 district

CM11 1 is a sector of the CM11 district: every postcode that starts CM11 1. It has 181 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 CM11 1 sector, by flood risk

Map of every postcode in the CM11 1 sector, by flood risk Of the 181 postcodes in the CM11 1 sector that ONS places, 181 are not on the Environment Agency's at-risk list. Places named: Billericay. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A176 CM11 1AA: not on the flood risk listCM11 1AB: not on the flood risk listCM11 1AE: not on the flood risk listCM11 1AF: not on the flood risk listCM11 1AG: not on the flood risk listCM11 1AH: not on the flood risk listCM11 1AJ: not on the flood risk listCM11 1AL: not on the flood risk listCM11 1AN: not on the flood risk listCM11 1AP: not on the flood risk listCM11 1AQ: not on the flood risk listCM11 1AS: not on the flood risk listCM11 1AT: not on the flood risk listCM11 1AU: not on the flood risk listCM11 1BA: not on the flood risk listCM11 1BB: not on the flood risk listCM11 1BG: not on the flood risk listCM11 1BH: not on the flood risk listCM11 1BJ: not on the flood risk listCM11 1BL: not on the flood risk listCM11 1BN: not on the flood risk listCM11 1BP: not on the flood risk listCM11 1BS: not on the flood risk listCM11 1BT: not on the flood risk listCM11 1BU: not on the flood risk listCM11 1BY: not on the flood risk listCM11 1BZ: not on the flood risk listCM11 1DB: not on the flood risk listCM11 1DD: not on the flood risk listCM11 1DE: not on the flood risk listCM11 1DF: not on the flood risk listCM11 1DG: not on the flood risk listCM11 1DH: not on the flood risk listCM11 1DJ: not on the flood risk listCM11 1DL: not on the flood risk listCM11 1DP: not on the flood risk listCM11 1DQ: not on the flood risk listCM11 1DR: not on the flood risk listCM11 1DS: not on the flood risk listCM11 1DT: not on the flood risk listCM11 1DU: not on the flood risk listCM11 1DX: not on the flood risk listCM11 1DY: not on the flood risk listCM11 1DZ: not on the flood risk listCM11 1EA: not on the flood risk listCM11 1EB: not on the flood risk listCM11 1ED: not on the flood risk listCM11 1EE: not on the flood risk listCM11 1EF: not on the flood risk listCM11 1EG: not on the flood risk listCM11 1EH: not on the flood risk listCM11 1EJ: not on the flood risk listCM11 1EL: not on the flood risk listCM11 1EN: not on the flood risk listCM11 1EP: not on the flood risk listCM11 1ER: not on the flood risk listCM11 1ES: not on the flood risk listCM11 1ET: not on the flood risk listCM11 1EU: not on the flood risk listCM11 1EX: not on the flood risk listCM11 1EY: not on the flood risk listCM11 1EZ: not on the flood risk listCM11 1FA: not on the flood risk listCM11 1FB: not on the flood risk listCM11 1GG: not on the flood risk listCM11 1HB: not on the flood risk listCM11 1HD: not on the flood risk listCM11 1HE: not on the flood risk listCM11 1HG: not on the flood risk listCM11 1HH: not on the flood risk listCM11 1HJ: not on the flood risk listCM11 1HL: not on the flood risk listCM11 1HN: not on the flood risk listCM11 1HP: not on the flood risk listCM11 1HQ: not on the flood risk listCM11 1HR: not on the flood risk listCM11 1HS: not on the flood risk listCM11 1HU: not on the flood risk listCM11 1HX: not on the flood risk listCM11 1HY: not on the flood risk listCM11 1HZ: not on the flood risk listCM11 1JA: not on the flood risk listCM11 1JB: not on the flood risk listCM11 1JD: not on the flood risk listCM11 1JE: not on the flood risk listCM11 1JF: not on the flood risk listCM11 1JG: not on the flood risk listCM11 1JH: not on the flood risk listCM11 1JJ: not on the flood risk listCM11 1JL: not on the flood risk listCM11 1JN: not on the flood risk listCM11 1JR: not on the flood risk listCM11 1JS: not on the flood risk listCM11 1JY: not on the flood risk listCM11 1JZ: not on the flood risk listCM11 1LA: not on the flood risk listCM11 1LB: not on the flood risk listCM11 1LD: not on the flood risk listCM11 1LE: not on the flood risk listCM11 1LG: not on the flood risk listCM11 1LH: not on the flood risk listCM11 1LJ: not on the flood risk listCM11 1LN: not on the flood risk listCM11 1LP: not on the flood risk listCM11 1LQ: not on the flood risk listCM11 1LR: not on the flood risk listCM11 1LS: not on the flood risk listCM11 1LT: not on the flood risk listCM11 1LU: not on the flood risk listCM11 1LW: not on the flood risk listCM11 1LX: not on the flood risk listCM11 1LY: not on the flood risk listCM11 1LZ: not on the flood risk listCM11 1NA: not on the flood risk listCM11 1NB: not on the flood risk listCM11 1ND: not on the flood risk listCM11 1NE: not on the flood risk listCM11 1NF: not on the flood risk listCM11 1NH: not on the flood risk listCM11 1NJ: not on the flood risk listCM11 1NL: not on the flood risk listCM11 1NN: not on the flood risk listCM11 1NP: not on the flood risk listCM11 1NQ: not on the flood risk listCM11 1NR: not on the flood risk listCM11 1NS: not on the flood risk listCM11 1NU: not on the flood risk listCM11 1NX: not on the flood risk listCM11 1NZ: not on the flood risk listCM11 1PA: not on the flood risk listCM11 1PB: not on the flood risk listCM11 1PH: not on the flood risk listCM11 1PJ: not on the flood risk listCM11 1PL: not on the flood risk listCM11 1PP: not on the flood risk listCM11 1PQ: not on the flood risk listCM11 1PR: not on the flood risk listCM11 1PS: not on the flood risk listCM11 1PT: not on the flood risk listCM11 1PU: not on the flood risk listCM11 1PW: not on the flood risk listCM11 1PZ: not on the flood risk listCM11 1QA: not on the flood risk listCM11 1QB: not on the flood risk listCM11 1QD: not on the flood risk listCM11 1QE: not on the flood risk listCM11 1QF: not on the flood risk listCM11 1QH: not on the flood risk listCM11 1QL: not on the flood risk listCM11 1QN: not on the flood risk listCM11 1QP: not on the flood risk listCM11 1QQ: not on the flood risk listCM11 1QR: not on the flood risk listCM11 1QS: not on the flood risk listCM11 1QU: not on the flood risk listCM11 1QY: not on the flood risk listCM11 1QZ: not on the flood risk listCM11 1RG: not on the flood risk listCM11 1RH: not on the flood risk listCM11 1RJ: not on the flood risk listCM11 1RL: not on the flood risk listCM11 1RN: not on the flood risk listCM11 1RP: not on the flood risk listCM11 1RR: not on the flood risk listCM11 1RT: not on the flood risk listCM11 1SA: not on the flood risk listCM11 1SB: not on the flood risk listCM11 1SD: not on the flood risk listCM11 1SE: not on the flood risk listCM11 1SF: not on the flood risk listCM11 1SG: not on the flood risk listCM11 1SH: not on the flood risk listCM11 1SJ: not on the flood risk listCM11 1SQ: not on the flood risk listCM11 1SX: not on the flood risk listCM11 1SZ: not on the flood risk listCM11 1WT: not on the flood risk listCM11 1WW: not on the flood risk list Billericay Map of every postcode in the CM11 1 sector, by flood risk Of the 181 postcodes in the CM11 1 sector that ONS places, 181 are not on the Environment Agency's at-risk list. Places named: Billericay. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A129 Billericay
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 181

Of the 181 postcodes in the CM11 1 sector that ONS places, 181 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

What do homes sell for in CM11 1?

Homes in CM11 1 sold for a typical £680,000 in the 12 months to August 2026, across 74 sales, down 11.3% on the 12 months before, HM Land Registry's figures show.

£680,000 typical price, the 12 months to August 2026
£766,500 12 months to August 2025
▼ down 11.3% on the 12 months before
  • Detached £830,000 41 sales
  • Semi-detached £491,250 26 sales
  • Terraced £420,000 5 sales
  • Flat or maisonette 2 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 CM11 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 CM11 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.

CM11 1AACM11 1ABCM11 1AECM11 1AFCM11 1AGCM11 1AHCM11 1AJCM11 1ALCM11 1ANCM11 1APCM11 1AQCM11 1ASCM11 1ATCM11 1AUCM11 1BACM11 1BBCM11 1BGCM11 1BHCM11 1BJCM11 1BLCM11 1BNCM11 1BPCM11 1BSCM11 1BTCM11 1BUCM11 1BYCM11 1BZCM11 1DBCM11 1DDCM11 1DECM11 1DFCM11 1DGCM11 1DHCM11 1DJCM11 1DLCM11 1DPCM11 1DQCM11 1DRCM11 1DSCM11 1DTCM11 1DUCM11 1DXCM11 1DYCM11 1DZCM11 1EACM11 1EBCM11 1EDCM11 1EECM11 1EFCM11 1EGCM11 1EHCM11 1EJCM11 1ELCM11 1ENCM11 1EPCM11 1ERCM11 1ESCM11 1ETCM11 1EUCM11 1EXCM11 1EYCM11 1EZCM11 1FACM11 1FBCM11 1GGCM11 1HBCM11 1HDCM11 1HECM11 1HGCM11 1HHCM11 1HJCM11 1HLCM11 1HNCM11 1HPCM11 1HQCM11 1HRCM11 1HSCM11 1HUCM11 1HXCM11 1HYCM11 1HZCM11 1JACM11 1JBCM11 1JDCM11 1JECM11 1JFCM11 1JGCM11 1JHCM11 1JJCM11 1JLCM11 1JNCM11 1JRCM11 1JSCM11 1JTCM11 1JYCM11 1JZCM11 1LACM11 1LBCM11 1LDCM11 1LECM11 1LGCM11 1LHCM11 1LJCM11 1LNCM11 1LPCM11 1LQCM11 1LRCM11 1LSCM11 1LTCM11 1LUCM11 1LWCM11 1LXCM11 1LYCM11 1LZCM11 1NACM11 1NBCM11 1NDCM11 1NECM11 1NFCM11 1NHCM11 1NJCM11 1NLCM11 1NNCM11 1NPCM11 1NQCM11 1NRCM11 1NSCM11 1NUCM11 1NXCM11 1NYCM11 1NZCM11 1PACM11 1PBCM11 1PHCM11 1PJCM11 1PLCM11 1PPCM11 1PQCM11 1PRCM11 1PSCM11 1PTCM11 1PUCM11 1PWCM11 1PZCM11 1QACM11 1QBCM11 1QDCM11 1QECM11 1QFCM11 1QHCM11 1QLCM11 1QNCM11 1QPCM11 1QQCM11 1QRCM11 1QSCM11 1QUCM11 1QYCM11 1QZCM11 1RGCM11 1RHCM11 1RJCM11 1RLCM11 1RNCM11 1RPCM11 1RRCM11 1RTCM11 1SACM11 1SBCM11 1SDCM11 1SECM11 1SFCM11 1SGCM11 1SHCM11 1SJCM11 1SQCM11 1SXCM11 1SYCM11 1SZCM11 1WTCM11 1WW

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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