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, and which are new since 2020

Map of every postcode in the CM11 1 sector, by new since 2020 Of the 181 postcodes in the CM11 1 sector that ONS places, 4 are new since 2020 and 177 were in use before 2020. Places named: Billericay. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A176 CM11 1AA: before 2020CM11 1AB: before 2020CM11 1AE: before 2020CM11 1AF: before 2020CM11 1AG: before 2020CM11 1AH: before 2020CM11 1AJ: before 2020CM11 1AL: before 2020CM11 1AN: before 2020CM11 1AP: before 2020CM11 1AQ: before 2020CM11 1AS: before 2020CM11 1AT: before 2020CM11 1AU: before 2020CM11 1BB: before 2020CM11 1BG: before 2020CM11 1BH: before 2020CM11 1BJ: before 2020CM11 1BL: before 2020CM11 1BN: before 2020CM11 1BP: before 2020CM11 1BS: before 2020CM11 1BT: before 2020CM11 1BU: before 2020CM11 1BY: before 2020CM11 1BZ: before 2020CM11 1DB: before 2020CM11 1DD: before 2020CM11 1DE: before 2020CM11 1DF: before 2020CM11 1DG: before 2020CM11 1DH: before 2020CM11 1DJ: before 2020CM11 1DL: before 2020CM11 1DP: before 2020CM11 1DQ: before 2020CM11 1DR: before 2020CM11 1DS: before 2020CM11 1DT: before 2020CM11 1DU: before 2020CM11 1DX: before 2020CM11 1DY: before 2020CM11 1DZ: before 2020CM11 1EA: before 2020CM11 1EB: before 2020CM11 1ED: before 2020CM11 1EE: before 2020CM11 1EF: before 2020CM11 1EG: before 2020CM11 1EH: before 2020CM11 1EJ: before 2020CM11 1EL: before 2020CM11 1EN: before 2020CM11 1EP: before 2020CM11 1ER: before 2020CM11 1ES: before 2020CM11 1ET: before 2020CM11 1EU: before 2020CM11 1EX: before 2020CM11 1EY: before 2020CM11 1EZ: before 2020CM11 1GG: before 2020CM11 1HB: before 2020CM11 1HD: before 2020CM11 1HE: before 2020CM11 1HG: before 2020CM11 1HH: before 2020CM11 1HJ: before 2020CM11 1HL: before 2020CM11 1HN: before 2020CM11 1HP: before 2020CM11 1HQ: before 2020CM11 1HR: before 2020CM11 1HS: before 2020CM11 1HU: before 2020CM11 1HX: before 2020CM11 1HY: before 2020CM11 1HZ: before 2020CM11 1JA: before 2020CM11 1JB: before 2020CM11 1JD: before 2020CM11 1JE: before 2020CM11 1JF: before 2020CM11 1JG: before 2020CM11 1JH: before 2020CM11 1JJ: before 2020CM11 1JL: before 2020CM11 1JN: before 2020CM11 1JR: before 2020CM11 1JS: before 2020CM11 1JY: before 2020CM11 1JZ: before 2020CM11 1LA: before 2020CM11 1LB: before 2020CM11 1LD: before 2020CM11 1LE: before 2020CM11 1LG: before 2020CM11 1LH: before 2020CM11 1LJ: before 2020CM11 1LN: before 2020CM11 1LP: before 2020CM11 1LQ: before 2020CM11 1LR: before 2020CM11 1LS: before 2020CM11 1LT: before 2020CM11 1LU: before 2020CM11 1LW: before 2020CM11 1LX: before 2020CM11 1LY: before 2020CM11 1LZ: before 2020CM11 1NA: before 2020CM11 1NB: before 2020CM11 1ND: before 2020CM11 1NE: before 2020CM11 1NF: before 2020CM11 1NH: before 2020CM11 1NJ: before 2020CM11 1NL: before 2020CM11 1NN: before 2020CM11 1NP: before 2020CM11 1NQ: before 2020CM11 1NR: before 2020CM11 1NS: before 2020CM11 1NU: before 2020CM11 1NX: before 2020CM11 1NZ: before 2020CM11 1PA: before 2020CM11 1PB: before 2020CM11 1PH: before 2020CM11 1PJ: before 2020CM11 1PL: before 2020CM11 1PP: before 2020CM11 1PQ: before 2020CM11 1PR: before 2020CM11 1PS: before 2020CM11 1PT: before 2020CM11 1PU: before 2020CM11 1PW: before 2020CM11 1PZ: before 2020CM11 1QA: before 2020CM11 1QB: before 2020CM11 1QD: before 2020CM11 1QE: before 2020CM11 1QF: before 2020CM11 1QH: before 2020CM11 1QL: before 2020CM11 1QN: before 2020CM11 1QP: before 2020CM11 1QQ: before 2020CM11 1QR: before 2020CM11 1QS: before 2020CM11 1QU: before 2020CM11 1QY: before 2020CM11 1QZ: before 2020CM11 1RG: before 2020CM11 1RH: before 2020CM11 1RJ: before 2020CM11 1RL: before 2020CM11 1RN: before 2020CM11 1RP: before 2020CM11 1RR: before 2020CM11 1RT: before 2020CM11 1SA: before 2020CM11 1SB: before 2020CM11 1SD: before 2020CM11 1SE: before 2020CM11 1SF: before 2020CM11 1SG: before 2020CM11 1SH: before 2020CM11 1SJ: before 2020CM11 1SQ: before 2020CM11 1SX: before 2020CM11 1SZ: before 2020CM11 1WT: before 2020CM11 1BA: new since 2020CM11 1FA: new since 2020CM11 1FB: new since 2020CM11 1WW: new since 2020 Billericay Map of every postcode in the CM11 1 sector, by new since 2020 Of the 181 postcodes in the CM11 1 sector that ONS places, 4 are new since 2020 and 177 were in use before 2020. Places named: Billericay. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A129 Billericay
  • New since 2020: 4
  • In use before 2020: 177

Of the 181 postcodes in the CM11 1 sector that ONS places, 4 are new since 2020 and 177 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 4 newest postcodes

CM11 1FAJanuary 2025CM11 1FBAugust 2024CM11 1WWAugust 2022CM11 1BAApril 2022

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.

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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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