CM21 area guide
House prices, recent sales, crime and schools for the CM21 postcode district in East Hertfordshire. Free to read, from official open data. For one address in detail, run a full property report.
East Hertfordshire · 2026-05 (UK HPI)
Median £506,750
Street-level crime at the district centre
Ofsted rated, within one mile
What the data says about CM21
The average home across East Hertfordshire is worth about £460,485 (UK House Price Index, 2026-05), and the median of the 12 most recent Land Registry sales recorded inside CM21 is £506,750, and prices have risen 4.2% over the last year.
Of 198 energy certificates sampled across 12 postcodes in CM21, band C is the most common, and 57.6% of homes sit below band C — the point at which most lenders' green mortgage deals and future rental rules bite.
Police recorded 268 crimes around the centre of CM21 in the six months to 2026-06, most often violence and sexual offences (113).
There are 3 schools rated Good or Outstanding by Ofsted within a mile of CM21 in East Hertfordshire, including Fawbert and Barnard Infants' School.
The district covers the Much Hadham, Rural East, Sawbridgeworth ward areas.
Sample of 198 energy certificates from 12 postcodes in CM21, taken from the government energy performance register, most recent lodged 2026. Indicative of the district rather than a full census.
Prices changed +4.2% over the last year in East Hertfordshire.
Street-level crime from data.police.uk, six months to 2026-06.
Primary
- Fawbert and Barnard Infants' SchoolOutstanding · 0.3 mi
- Mandeville Primary SchoolGood · 0.3 mi
- Reedings Junior SchoolNot rated · 0.4 mi
- High Wych Church of England Primary SchoolNot rated · 1.1 mi
- Spellbrook CofE Primary SchoolGood · 1.6 mi
Secondary
- LeventhorpeGood · 0.6 mi
- Saint Nicholas SchoolNot rated · 2.4 mi
- Mark Hall AcademyNot rated · 2.4 mi
- The Bishop's Stortford High SchoolNot rated · 2.6 mi
- St Elizabeth's SchoolNot rated · 2.7 mi
Much Hadham · Rural East · Sawbridgeworth
Common questions about CM21
What is the average house price in CM21?
The UK House Price Index puts the average home in East Hertfordshire at £460,485 as of 2026-05. Recent Land Registry sales recorded inside the CM21 district have a median price of £506,750.
How much does each property type cost in CM21?
Detached £890,934, semi-detached £530,418, terraced £416,913, flats £252,822, based on the UK House Price Index for East Hertfordshire.
Is CM21 a safe area?
Police recorded 268 crimes near the centre of CM21 in the six months to 2026-06. The most common category was violence and sexual offences with 113 reports. Crime is recorded at street level, so figures vary street to street within the same district.
What EPC rating do homes in CM21 usually have?
Band C is the most common rating in our sample of 198 certificates from CM21, with 57.6% of homes rated below band C. A full property report shows the exact certificate, running costs and recommended improvements for one address.
What are the schools like near CM21?
3 schools within a mile of the CM21 district centre are rated Good or Outstanding by Ofsted. Nearby secondaries include Leventhorpe. Catchment areas are set by the local authority and can change year to year.
Where does this CM21 data come from?
HM Land Registry Price Paid Data and the UK House Price Index for prices, the government's energy performance register for EPC bands, data.police.uk for crime, Get Information About Schools and Ofsted for schools, and ONS postcode geography. All are published under the Open Government Licence v3.0.
A full report covers the energy certificate, sale history and valuation, council tax band and bill, flood and crime risk, schools, transport and neighbourhood data for a single property.
Search an addressMore on CM21
Nearby CM postcode districts
Sources: HM Land Registry Price Paid Data and UK House Price Index, ONS postcode geography, data.police.uk, Get Information About Schools and Ofsted. Contains public sector information licensed under the Open Government Licence v3.0.