CM4
Postcode districtPostcode district covering Ingatestone, Stock and Heybridge, in Brentwood and Chelmsford.
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 CM4 postcode. How census figures are added up
Radon Affected Area by postcode district
Worked out by Open Index · 2022
About 0% of people in CM4 live in a 1 km square that the radon atlas marks as a radon Affected Area.
How CM4 compares
Each dot is a postcode district. The black line marks the middle one.
Is CM4 safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CM4 at a rate of 50.3 per 1,000 people.
That compares with 77.3 per 1,000 people across the CM postcode area.
In August 2026 alone, 45 cases of crime and anti-social behaviour were recorded in CM4.
In the 12 months to August 2026, the most common types were violence and sexual offences (170), other crime (109) and anti-social behaviour (87).
A year earlier, the recorded crime rate in CM4 was 48.3 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 CM4, neighbourhood by neighbourhood
- Deprivation is ranked by neighbourhood, so CM4 has no single figure. Of its 7 neighbourhoods with a rank:
- Decile 5: 1 neighbourhood
- Decile 6: 1 neighbourhood
- Decile 7: 2 neighbourhoods
- Decile 8: 1 neighbourhood
- Decile 9: 1 neighbourhood
- Decile 10 (England’s least deprived 10%): 1 neighbourhood
English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.
Neighbourhoods in CM4
| Name | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
|---|---|---|---|---|
| Brentwood 001E | 1,167 | 51.3 per 1,000 | 7 | 95.6% |
| Brentwood 002A | 1,523 | 25.4 per 1,000 | 7 | 50.4% |
| Brentwood 002B | 1,717 | 71.1 per 1,000 | 9 | 57.8% |
| Brentwood 002C | 1,285 | 10.8 per 1,000 | 10 | 41.4% |
| Brentwood 002D | 1,841 | 56.2 per 1,000 | 6 | 61.5% |
| Chelmsford 018B | 1,724 | 78.3 per 1,000 | 5 | 37.5% |
| Chelmsford 018G | 1,679 | 97.0 per 1,000 | 8 | 31.8% |
MPs for CM4
- Alex BurghartConservativeMP for Brentwood and Ongar62% of CM4’s postcodes
- Sir John WhittingdaleConservativeMP for Maldon36% of CM4’s postcodes
- Mrs Kemi BadenochConservativeMP for North West Essex1.6% of CM4’s postcodes
- Mr Richard HoldenConservativeMP for Basildon and Billericay0.9% of CM4’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 CM42
Postcode sectors in CM42
Councils CM4 covers2
Postcode districts next to CM48
Nearest rail stations2
More in the CM postcode area2
CM4 in brief
CM4 is a postcode district covering Ingatestone, Stock and Heybridge, in Brentwood and Chelmsford.
About 11,148 people lived in CM4 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £690,000 in 2025 across 223 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 50.3 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CM4 was £690,000 in 2025.
CM4 had 10,828 usual residents at the census.
About 0% of people in CM4 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In CM4, 54.1% of homes and businesses could get gigabit-capable broadband in January 2026.