CM23 area guide
House prices, recent sales, crime and schools for the CM23 postcode district in East Hertfordshire. Free to read, from official open data. For one address in detail, run a full property report.
East Hertfordshire · 2026-07 (UK HPI)
Median £415,000
Street-level crime at the district centre
Ofsted rated, within one mile
What the data says about CM23
The average home across East Hertfordshire is worth about £457,417 (UK House Price Index, 2026-07), and the median of the 55 most recent Land Registry sales recorded inside CM23 is £415,000, and prices have risen 3.7% over the last year.
Of 162 energy certificates sampled across 12 postcodes in CM23, band C is the most common, and 45.7% of homes sit below band C — the point at which most lenders' green mortgage deals and future rental rules bite.
Police recorded 1,451 crimes around the centre of CM23 in the six months to 2026-07, most often violence and sexual offences (495).
There are 5 schools rated Good or Outstanding by Ofsted within a mile of CM23 in East Hertfordshire, including Windhill21.
The district covers the Bishop's Stortford All Saints, Bishop's Stortford Central, Bishop's Stortford North, Bishop's Stortford Parsonage ward areas.
Sample of 162 energy certificates from 12 postcodes in CM23, taken from the government energy performance register, most recent lodged 2026. Indicative of the district rather than a full census.
Prices changed +3.7% over the last year in East Hertfordshire.
Street-level crime from data.police.uk, six months to 2026-07.
Primary
- Windhill21Not rated · 0.3 mi
- St Michael's Church of England Primary SchoolGood · 0.3 mi
- Northgate Primary SchoolGood · 0.4 mi
- St Joseph's Catholic Primary School B/SGood · 0.5 mi
- All Saints Church of England Primary School and Nursery, Bishop's StortfordNot rated · 0.8 mi
Secondary
- St Mary's Catholic SchoolNot rated · 0.2 mi
- White Trees Independent SchoolNot rated · 0.3 mi
- Bishop's Stortford CollegeNot rated · 0.5 mi
- Hockerill Anglo-European CollegeGood · 0.6 mi
- The Hertfordshire & Essex High School and Science CollegeOutstanding · 0.7 mi
Bishop's Stortford All Saints · Bishop's Stortford Central · Bishop's Stortford North · Bishop's Stortford Parsonage · Bishop's Stortford South · Bishop's Stortford Thorley Manor · Broad Oak & the Hallingburys · Little Hadham & The Pelhams · Sawbridgeworth · Stansted North · Stansted South & Birchanger · Stort Valley
Common questions about CM23
What is the average house price in CM23?
The UK House Price Index puts the average home in East Hertfordshire at £457,417 as of 2026-07. Recent Land Registry sales recorded inside the CM23 district have a median price of £415,000.
How much does each property type cost in CM23?
Detached £886,059, semi-detached £527,170, terraced £415,559, flats £249,522, based on the UK House Price Index for East Hertfordshire.
Is CM23 a safe area?
Police recorded 1,451 crimes near the centre of CM23 in the six months to 2026-07. The most common category was violence and sexual offences with 495 reports. Crime is recorded at street level, so figures vary street to street within the same district.
What EPC rating do homes in CM23 usually have?
Band C is the most common rating in our sample of 162 certificates from CM23, with 45.7% 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 CM23?
5 schools within a mile of the CM23 district centre are rated Good or Outstanding by Ofsted. Nearby secondaries include St Mary's Catholic School. Catchment areas are set by the local authority and can change year to year.
Where does this CM23 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 CM23
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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.