CM21
Postcode districtPostcode district covering Sawbridgeworth, High Wych and Lower Sheering, in East Hertfordshire and Epping Forest.
Approximate outline worked out by Open Index from the ONS Postcode Directory: each census output area belongs to the district that holds most of its postcodes. People, homes, recorded crime and broadband add up those output areas. House sales count every sale with an CM21 postcode. How census figures are added up
Gigabit coverage by postcode district
Connected Nations (Ofcom) · January 2026
In CM21, 82.8% of homes and businesses could get gigabit-capable broadband in January 2026.
How CM21 compares
Each dot is a postcode district. The black line marks the middle one.
Is CM21 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CM21 at a rate of 54.1 per 1,000 people.
That compares with 77.3 per 1,000 people across CM.
In August 2026 alone, 75 cases of crime and anti-social behaviour were recorded in CM21.
In the 12 months to August 2026, the most common types were violence and sexual offences (254), anti-social behaviour (131) and other crime (104).
A year earlier, the recorded crime rate in CM21 was 60.9 per 1,000 people.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.
Deprivation in CM21, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so CM21 has no single figure. Of its 7 neighbourhoods with a rank:
- Decile 5: 2 neighbourhoods
- Decile 9: 1 neighbourhood
- Decile 10 (England’s least deprived 10%): 4 neighbourhoods
English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.
Neighbourhoods in CM21
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| East Hertfordshire 009C | 1,416 | 52.4 per 1,000 | 5 | 49.7% |
| East Hertfordshire 011A | 2,183 | 97.4 per 1,000 | 5 | 83.8% |
| East Hertfordshire 011B | 1,667 | 32.5 per 1,000 | 10 | 70.0% |
| East Hertfordshire 011C | 1,572 | 53.3 per 1,000 | 9 | 91.6% |
| East Hertfordshire 011D | 1,731 | 55.8 per 1,000 | 10 | 81.3% |
| East Hertfordshire 011E | 1,591 | 33.9 per 1,000 | 10 | 92.1% |
| Epping Forest 001B | 2,173 | 33.6 per 1,000 | 10 | 78.0% |
MPs for CM21
- Josh DeanLabourMP for Hertford and Stortford86% of CM21’s postcodes
- Chris VinceLabour (Co-op)MP for Harlow14% of CM21’s postcodes
As of , from the UK Parliament Members API. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.
Middle areas in CM211
Postcode sectors in CM213
Councils CM21 covers2
Towns in CM211
Postcode districts next to CM217
Nearest rail stations3
More in the CM postcode area2
CM21 in brief
CM21 is a postcode district covering Sawbridgeworth, High Wych and Lower Sheering, in East Hertfordshire and Epping Forest.
About 12,099 people lived in CM21 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £450,000 in 2025 across 207 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 54.1 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CM21 was £450,000 in 2025.
CM21 had 11,371 usual residents at the census.
In CM21, 82.8% of homes and businesses could get gigabit-capable broadband in January 2026.
In CM21, 2.1% of residents aged 16 to 64 were claiming out-of-work benefits in August 2026.