CM21 0 postcode sector in the CM21 district

CM21 0 is a sector of the CM21 district: every postcode that starts CM21 0. It has 136 postcodes in use.

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

Every postcode in the CM21 0 sector, by flood risk

Map of every postcode in the CM21 0 sector, by flood risk Of the 136 postcodes in the CM21 0 sector that ONS places, 5 have a home or business at high risk, 1 are at low risk at worst and 130 are not on the Environment Agency's at-risk list. Places named: Sawbridgeworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. CM21 0AA: not on the flood risk listCM21 0AB: not on the flood risk listCM21 0AD: not on the flood risk listCM21 0AE: not on the flood risk listCM21 0AF: not on the flood risk listCM21 0AH: not on the flood risk listCM21 0AJ: not on the flood risk listCM21 0AL: not on the flood risk listCM21 0AN: not on the flood risk listCM21 0AP: not on the flood risk listCM21 0AQ: not on the flood risk listCM21 0AR: not on the flood risk listCM21 0AS: not on the flood risk listCM21 0AT: not on the flood risk listCM21 0AU: not on the flood risk listCM21 0AX: not on the flood risk listCM21 0AY: not on the flood risk listCM21 0AZ: not on the flood risk listCM21 0BB: not on the flood risk listCM21 0BD: not on the flood risk listCM21 0BE: not on the flood risk listCM21 0BJ: not on the flood risk listCM21 0BL: not on the flood risk listCM21 0BN: not on the flood risk listCM21 0BP: not on the flood risk listCM21 0BS: not on the flood risk listCM21 0BT: not on the flood risk listCM21 0BU: not on the flood risk listCM21 0BX: not on the flood risk listCM21 0BY: not on the flood risk listCM21 0BZ: not on the flood risk listCM21 0DA: not on the flood risk listCM21 0DB: not on the flood risk listCM21 0DD: not on the flood risk listCM21 0DE: not on the flood risk listCM21 0DF: not on the flood risk listCM21 0DH: not on the flood risk listCM21 0DJ: not on the flood risk listCM21 0DN: not on the flood risk listCM21 0DQ: not on the flood risk listCM21 0DR: not on the flood risk listCM21 0DS: not on the flood risk listCM21 0DT: not on the flood risk listCM21 0DU: not on the flood risk listCM21 0DW: not on the flood risk listCM21 0DY: not on the flood risk listCM21 0DZ: not on the flood risk listCM21 0EA: not on the flood risk listCM21 0EB: not on the flood risk listCM21 0ED: not on the flood risk listCM21 0EE: not on the flood risk listCM21 0EF: not on the flood risk listCM21 0EG: not on the flood risk listCM21 0EH: not on the flood risk listCM21 0EJ: not on the flood risk listCM21 0EL: not on the flood risk listCM21 0EN: not on the flood risk listCM21 0EP: not on the flood risk listCM21 0ER: not on the flood risk listCM21 0ES: not on the flood risk listCM21 0ET: not on the flood risk listCM21 0EU: not on the flood risk listCM21 0EW: not on the flood risk listCM21 0EY: not on the flood risk listCM21 0EZ: not on the flood risk listCM21 0FA: not on the flood risk listCM21 0FB: not on the flood risk listCM21 0FD: not on the flood risk listCM21 0FE: not on the flood risk listCM21 0FF: not on the flood risk listCM21 0FG: not on the flood risk listCM21 0FJ: not on the flood risk listCM21 0FL: not on the flood risk listCM21 0FN: not on the flood risk listCM21 0FP: not on the flood risk listCM21 0FQ: not on the flood risk listCM21 0FR: not on the flood risk listCM21 0FS: not on the flood risk listCM21 0FT: not on the flood risk listCM21 0HA: not on the flood risk listCM21 0HB: not on the flood risk listCM21 0HD: not on the flood risk listCM21 0HE: not on the flood risk listCM21 0HF: not on the flood risk listCM21 0HG: not on the flood risk listCM21 0HH: not on the flood risk listCM21 0HL: not on the flood risk listCM21 0HN: not on the flood risk listCM21 0HP: not on the flood risk listCM21 0HQ: not on the flood risk listCM21 0HR: not on the flood risk listCM21 0HS: not on the flood risk listCM21 0HT: not on the flood risk listCM21 0HU: not on the flood risk listCM21 0HX: not on the flood risk listCM21 0HY: not on the flood risk listCM21 0HZ: not on the flood risk listCM21 0JA: not on the flood risk listCM21 0JB: not on the flood risk listCM21 0JD: not on the flood risk listCM21 0JE: not on the flood risk listCM21 0JJ: not on the flood risk listCM21 0JL: not on the flood risk listCM21 0JN: not on the flood risk listCM21 0JP: not on the flood risk listCM21 0JQ: not on the flood risk listCM21 0JR: not on the flood risk listCM21 0JT: not on the flood risk listCM21 0JU: not on the flood risk listCM21 0JW: not on the flood risk listCM21 0JX: not on the flood risk listCM21 0JY: not on the flood risk listCM21 0JZ: not on the flood risk listCM21 0LA: not on the flood risk listCM21 0LD: not on the flood risk listCM21 0LE: not on the flood risk listCM21 0LF: not on the flood risk listCM21 0LH: not on the flood risk listCM21 0LJ: not on the flood risk listCM21 0LL: not on the flood risk listCM21 0LQ: not on the flood risk listCM21 0LS: not on the flood risk listCM21 0LT: not on the flood risk listCM21 0LU: not on the flood risk listCM21 0LX: not on the flood risk listCM21 0LY: not on the flood risk listCM21 0NA: not on the flood risk listCM21 0ND: not on the flood risk listCM21 0NG: not on the flood risk listCM21 0LR: low flood risk at worstCM21 0BW: high flood riskCM21 0LB: high flood riskCM21 0LP: high flood riskCM21 0NB: high flood riskCM21 0RL: high flood risk Sawbridgeworth Map of every postcode in the CM21 0 sector, by flood risk Of the 136 postcodes in the CM21 0 sector that ONS places, 5 have a home or business at high risk, 1 are at low risk at worst and 130 are not on the Environment Agency's at-risk list. Places named: Sawbridgeworth. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. Sawbridgeworth
  • A home or business at high risk: 5
  • At medium risk at worst: 0
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 130

Of the 136 postcodes in the CM21 0 sector that ONS places, 5 have a home or business at high risk, 1 are at low risk at worst and 130 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

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

CM21 0LB5 at high riskCM21 0RL2 at high riskCM21 0NB2 at high riskCM21 0BW1 at high riskCM21 0LP1 at high risk

What do homes sell for in CM21 0?

Homes in CM21 0 sold for a typical £492,500 in the 12 months to August 2026, across 44 sales, down 15.1% on the 12 months before, HM Land Registry's figures show.

£492,500 typical price, the 12 months to August 2026
£580,000 12 months to August 2025
▼ down 15.1% on the 12 months before
  • Detached £622,500 14 sales
  • Semi-detached £485,000 17 sales
  • Terraced £374,500 8 sales
  • Flat or maisonette £160,000 5 sales

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 CM21 0. 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 CM21 0

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.

CM21 0AACM21 0ABCM21 0ADCM21 0AECM21 0AFCM21 0AHCM21 0AJCM21 0ALCM21 0ANCM21 0APCM21 0AQCM21 0ARCM21 0ASCM21 0ATCM21 0AUCM21 0AXCM21 0AYCM21 0AZCM21 0BBCM21 0BDCM21 0BECM21 0BJCM21 0BLCM21 0BNCM21 0BPCM21 0BSCM21 0BTCM21 0BUCM21 0BWCM21 0BXCM21 0BYCM21 0BZCM21 0DACM21 0DBCM21 0DDCM21 0DECM21 0DFCM21 0DHCM21 0DJCM21 0DNCM21 0DQCM21 0DRCM21 0DSCM21 0DTCM21 0DUCM21 0DWCM21 0DYCM21 0DZCM21 0EACM21 0EBCM21 0EDCM21 0EECM21 0EFCM21 0EGCM21 0EHCM21 0EJCM21 0ELCM21 0ENCM21 0EPCM21 0ERCM21 0ESCM21 0ETCM21 0EUCM21 0EWCM21 0EYCM21 0EZCM21 0FACM21 0FBCM21 0FDCM21 0FECM21 0FFCM21 0FGCM21 0FHCM21 0FJCM21 0FLCM21 0FNCM21 0FPCM21 0FQCM21 0FRCM21 0FSCM21 0FTCM21 0HACM21 0HBCM21 0HDCM21 0HECM21 0HFCM21 0HGCM21 0HHCM21 0HLCM21 0HNCM21 0HPCM21 0HQCM21 0HRCM21 0HSCM21 0HTCM21 0HUCM21 0HXCM21 0HYCM21 0HZCM21 0JACM21 0JBCM21 0JDCM21 0JECM21 0JJCM21 0JLCM21 0JNCM21 0JPCM21 0JQCM21 0JRCM21 0JTCM21 0JUCM21 0JWCM21 0JXCM21 0JYCM21 0JZCM21 0LACM21 0LBCM21 0LDCM21 0LECM21 0LFCM21 0LHCM21 0LJCM21 0LLCM21 0LPCM21 0LQCM21 0LRCM21 0LSCM21 0LTCM21 0LUCM21 0LXCM21 0LYCM21 0NACM21 0NBCM21 0NDCM21 0NGCM21 0RL

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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