5,066
Households
White Brit. · 88%
Ethnicity
Christian · 49%
Religion
Least deprived 10–20%
Avg IMD
Around average · 6.7 per 1k
Crimes · Sep '26
£430,000
Median property price · CM21 · Oct 2025–Sep 2026 · 129 sales
319
Postcodes
Sold prices in CM21
England & WalesProperty sales · CM21
HM Land Registry · CM21
Average price
£456,511
Median price: £430,000
Median -9.5% vs prior 12 months
Standard sales only · Oct 2025–Sep 2026 · 129 sales
Property type filter
Recent sale price trend
Oct '25 – Sep '26Sep '26: 5 sales · avg £442,200
X axis: MonthY axis: Avg sold price (hover shows sales count)
£537k£450k£362k
Oct '25Jan '26Apr '26Sep '26
Contains HM Land Registry data © Crown copyright and database right. This data is licensed under the Open Government Licence v3.0.
Police Recorded Crime in CM21
England & WalesCrime trends · CM21
Approx. — based on 7 LSOAs mostly in CM21 (police.uk, Census 2021)
data.police.uk · YoY vs same month last year · per 1,000 residents (Census 2021)Oct '24 – Sep '26
Key categories · YoY
Violent Crime
24
YoY -29%
34218
Oct '24Apr '25Oct '25Apr '26Sep '26
ASB
27
YoY +108%
28163
Oct '24Apr '25Oct '25Apr '26Sep '26
Vehicle Crime
5
YoY —
1260
Oct '24Apr '25Oct '25Apr '26Sep '26
Burglary
3
YoY —
840
Oct '24Apr '25Oct '25Apr '26Sep '26
Criminal damage
6
YoY —
951
Oct '24Apr '25Oct '25Apr '26Sep '26
Other recorded crime
14
YoY +27%
24143
Oct '24Apr '25Oct '25Apr '26Sep '26
Demographics in CM21
Ethnicity
White Brit.88.3%
Other White4.5%
White Irish1.0%
Indian0.7%
Other ethnic group0.7%
+ 14 other groups · 4.7%
Religion
Christian49.4%
No religion42.1%
Not answered5.6%
Muslim1.2%
Jewish0.6%
+ 4 other religions · 1.2%
Age groups
50–6420.9%
35–4920.3%
65–7411.6%
25–3410.7%
10–157.5%
+ 6 other age groups · 29.0%
Households
Married or civil partnership couple: Dependent children17.3%
One person: other15.9%
One person: aged 66+13.4%
Single family household, all members 66+12.4%
Married or civil partnership couple: No children10.8%
+ 9 other households · 30.2%
Area Deprivation (Average IMD) for CM21
Area IMD profile
This area-level value is averaged from postcode IMD deciles within the area boundary.
Least deprived 10–20%
Mean decile 8.54 (1 = most deprived, 10 = least)
1 - Most deprived10 - Least deprived
Overall this area reads as Least deprived 10–20% on relative deprivation, with a mean IMD decile of 8.54 (average of postcode-level deciles in this boundary).
School applications
This postcode district spans two councils: Hertfordshire and Essex.
School applications go through the council for each address.
Apply for a primary placeApply for a secondary placeAdmissions and composite prospectus guidance (GOV.UK)Application deadlines and offer days in EnglandHome education: find your council (GOV.UK)Home education guidance (GOV.UK)
Apply on GOV.UK. It sends you to your council's application form.
Overview of CM21
Coordinates51.8125, 0.1450
Postcodes
319
Census 2021 (sum of output areas)
11,826
Households (Census)
5,066
Recorded crime · Sep '26 · per 1,000 residents (Census 2021)
Around average · 6.7 per 1k
Wards in CM21
Postcodes in CM21
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 0RLCM21 1BBCM21 1BSCM21 1BTCM21 1BYCM21 1DBCM21 1DDCM21 1DECM21 1DHCM21 9AACM21 9ABCM21 9ADCM21 9AECM21 9AGCM21 9AHCM21 9AJCM21 9ANCM21 9AQCM21 9ARCM21 9ATCM21 9AXCM21 9AYCM21 9AZCM21 9BACM21 9BBCM21 9BDCM21 9BECM21 9BGCM21 9BHCM21 9BJCM21 9BLCM21 9BNCM21 9BQCM21 9BSCM21 9BUCM21 9BWCM21 9BXCM21 9BYCM21 9BZCM21 9DACM21 9DBCM21 9DDCM21 9DECM21 9DFCM21 9DGCM21 9DHCM21 9DJCM21 9DLCM21 9DNCM21 9DPCM21 9DQCM21 9DRCM21 9DSCM21 9DTCM21 9DUCM21 9DWCM21 9DXCM21 9DYCM21 9EACM21 9EBCM21 9EDCM21 9EFCM21 9EHCM21 9EJCM21 9ELCM21 9ENCM21 9EPCM21 9ERCM21 9ESCM21 9ETCM21 9EUCM21 9EWCM21 9EXCM21 9EYCM21 9FACM21 9FBCM21 9FDCM21 9FECM21 9FFCM21 9FGCM21 9FHCM21 9FJCM21 9FNCM21 9FPCM21 9FQCM21 9FRCM21 9GYCM21 9GZCM21 9HACM21 9HBCM21 9HDCM21 9HECM21 9HGCM21 9HHCM21 9HJCM21 9HLCM21 9HNCM21 9HPCM21 9HRCM21 9HSCM21 9HTCM21 9HUCM21 9HXCM21 9HYCM21 9HZCM21 9JACM21 9JBCM21 9JECM21 9JFCM21 9JGCM21 9JHCM21 9JJCM21 9JLCM21 9JNCM21 9JPCM21 9JRCM21 9JSCM21 9JTCM21 9JXCM21 9JYCM21 9JZCM21 9LDCM21 9LECM21 9LFCM21 9LGCM21 9LHCM21 9LJCM21 9LLCM21 9LNCM21 9LPCM21 9LQCM21 9LRCM21 9LWCM21 9LZCM21 9NACM21 9NBCM21 9NDCM21 9NECM21 9NFCM21 9NGCM21 9NHCM21 9NJCM21 9NLCM21 9NNCM21 9NPCM21 9NQCM21 9NRCM21 9NSCM21 9NTCM21 9NUCM21 9NWCM21 9NXCM21 9NYCM21 9PECM21 9PFCM21 9PLCM21 9PNCM21 9PPCM21 9PRCM21 9PSCM21 9PTCM21 9PUCM21 9PWCM21 9PXCM21 9PYCM21 9PZCM21 9QACM21 9QDCM21 9QECM21 9QGCM21 9QHCM21 9QJCM21 9QLCM21 9QNCM21 9QPCM21 9QUCM21 9QWCM21 9RACM21 9RBCM21 9RDCM21 9RECM21 9RFCM21 9RGCM21 9TD
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