# CM6

Postcode district covering Great Dunmow, in Uttlesford.

CM6 is a postcode district covering Great Dunmow, in Uttlesford. Median sale price £465,000 in 2025. Recorded crime 50.1 per 1,000 people. About 30,658 people.

Postcode district. Code CM6. In: [Postcodes](https://openindex.co.uk/postcode) › [CM](https://openindex.co.uk/postcode/cm)

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 CM6 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £465,000** (2025). The median price paid for a home in CM6 was £465,000 in 2025. Joint 373rd most expensive of 2,235. Source: Worked out by Open Index from HM Land Registry Price Paid Data. Published 28 September 2026. https://openindex.co.uk/postcode/cm6#f-house-sales-median-price
- **Population: 29,394** (2021). CM6 had 29,394 usual residents at the census (ONS Census 2021). 954th most populated of 2,756. Source: Census 2021, England and Wales and Scotland's Census 2022 and Census 2021, Northern Ireland, 2021. Published 21 July 2026. https://openindex.co.uk/postcode/cm6#f-population
- **People in radon Affected Area squares: 0%** (2022). About 0% of people in CM6 live in a 1 km square that the radon atlas marks as a radon Affected Area. UK 44%. Source: Worked out by Open Index from the UKHSA and BGS radon atlas and census output areas. Published 1 December 2022. https://openindex.co.uk/postcode/cm6#f-radon-affected-share
- **Gigabit broadband coverage: 87.2%** (January 2026). In CM6, 87.2% of homes and businesses could get gigabit-capable broadband in January 2026 (Ofcom). UK 87.8%. Source: Connected Nations (Ofcom), January 2026. Published 13 May 2026. https://openindex.co.uk/postcode/cm6#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=CM6) (Worked out by Open Index · 2022): About 0% of people in CM6 live in a 1 km square that the radon atlas marks as a radon Affected Area.
- [Sales per year by postcode district](https://openindex.co.uk/map/house-sales-per-year?place=CM6) (Worked out by Open Index · 2025): 616 homes were sold in CM6 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=CM6) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for CM6.
- [Population by postcode district](https://openindex.co.uk/map/population?place=CM6) (Census 2021, England and Wales): CM6 had 29,394 usual residents at the census.

## How CM6 compares

Each postcode district against every other postcode district the measure covers.

| Measure | CM6 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £465,000 | joint 9th most expensive | 25 postcode districts, CM · 2025 |
| Population | 29,394 | 8th most populated | 27 postcode districts, CM · 2021 |
| People in radon Affected Area squares | 0% | joint fewest people in radon Affected Areas | 27 postcode districts, CM · 2022 |
| Gigabit broadband coverage | 87.2% | 10th lowest | 27 postcode districts, CM · Jan 2026 |

## Is CM6 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CM6 at a rate of 50.1 per 1,000 people.
That compares with 77.3 per 1,000 people across the CM postcode area.
In August 2026 alone, 163 cases of crime and anti-social behaviour were recorded in CM6.
In the 12 months to August 2026, the most common types were violence and sexual offences (640), other crime (282) and anti-social behaviour (179).
A year earlier, the recorded crime rate in CM6 was 46.1 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 CM6, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so CM6 has no single figure. Of its 17 neighbourhoods with a rank:
- Decile 6: 5 neighbourhoods
- Decile 7: 6 neighbourhoods
- Decile 8: 2 neighbourhoods
- Decile 9: 3 neighbourhoods
- Decile 10 (England’s least deprived 10%): 1 neighbourhood

Source: English Indices of Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in England.

## Neighbourhoods in CM6

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Uttlesford 004A](https://openindex.co.uk/uttlesford/neighbourhood/e01022092) | 1,854 | 43.4 per 1,000 | 7 | 82.2% |
| [Uttlesford 004B](https://openindex.co.uk/uttlesford/neighbourhood/e01022093) | 2,255 | 33.9 per 1,000 | 6 | 73.1% |
| [Uttlesford 006D](https://openindex.co.uk/uttlesford/neighbourhood/e01022095) | 1,730 | 30.4 per 1,000 | 7 | 94.7% |
| [Uttlesford 006H](https://openindex.co.uk/uttlesford/neighbourhood/e01035181) | 1,341 | 45.2 per 1,000 | 8 | 92.7% |
| [Uttlesford 006I](https://openindex.co.uk/uttlesford/neighbourhood/e01035182) | 1,285 | 33.1 per 1,000 | 6 | 92.3% |
| [Uttlesford 007B](https://openindex.co.uk/uttlesford/neighbourhood/e01022067) | 1,919 | 83.3 per 1,000 | 7 | 64.0% |
| [Uttlesford 007C](https://openindex.co.uk/uttlesford/neighbourhood/e01022068) | 1,999 | 63.4 per 1,000 | 8 | 87.2% |
| [Uttlesford 007D](https://openindex.co.uk/uttlesford/neighbourhood/e01033054) | 1,232 | 40.3 per 1,000 | 6 | 90.1% |
| [Uttlesford 007E](https://openindex.co.uk/uttlesford/neighbourhood/e01033055) | 2,284 | 64.0 per 1,000 | 10 | 98.1% |
| [Uttlesford 007F](https://openindex.co.uk/uttlesford/neighbourhood/e01033056) | 1,585 | 57.8 per 1,000 | 7 | 95.6% |
| [Uttlesford 008A](https://openindex.co.uk/uttlesford/neighbourhood/e01022058) | 1,646 | 26.2 per 1,000 | 7 | 96.5% |
| [Uttlesford 008B](https://openindex.co.uk/uttlesford/neighbourhood/e01022064) | 1,921 | 39.5 per 1,000 | 9 | 89.9% |
| [Uttlesford 008D](https://openindex.co.uk/uttlesford/neighbourhood/e01022069) | 1,598 | 68.4 per 1,000 | 9 | 89.0% |
| [Uttlesford 008E](https://openindex.co.uk/uttlesford/neighbourhood/e01022088) | 1,726 | 44.5 per 1,000 | 7 | 92.7% |
| [Uttlesford 008F](https://openindex.co.uk/uttlesford/neighbourhood/e01033052) | 1,935 | 56.2 per 1,000 | 6 | 88.8% |
| [Uttlesford 008G](https://openindex.co.uk/uttlesford/neighbourhood/e01033053) | 2,210 | 49.9 per 1,000 | 9 | 97.3% |
| [Uttlesford 009D](https://openindex.co.uk/uttlesford/neighbourhood/e01022096) | 2,094 | 43.9 per 1,000 | 6 | 88.4% |

## Your MP

- [North West Essex](https://openindex.co.uk/constituency/north-west-essex): Mrs Kemi Badenoch (Conservative), MP since July 2024. 79% of the people here.
- [Braintree](https://openindex.co.uk/constituency/braintree): Sir James Cleverly (Conservative), MP since July 2024. 19% of the people here.
- [Harlow](https://openindex.co.uk/constituency/harlow): Chris Vince (Labour (Co-op)), MP since July 2024. 2.7% of the people here.

As of 18 October 2026. Contains Parliamentary information licensed under the Open Parliament Licence v3.0. Source: UK Parliament, Members API.

## Middle areas in CM6

[Flitch Green, Felsted & High Easter](https://openindex.co.uk/uttlesford/flitch-green-felsted-and-high-easter), [Great Dunmow](https://openindex.co.uk/uttlesford/great-dunmow)

## Postcode sectors in CM6

[CM6 1 (378 postcodes)](https://openindex.co.uk/postcode/cm6-1), [CM6 2 (232 postcodes)](https://openindex.co.uk/postcode/cm6-2), [CM6 3 (309 postcodes)](https://openindex.co.uk/postcode/cm6-3), [CM6 4 (61 postcodes)](https://openindex.co.uk/postcode/cm6-4), [CM6 9 (9 postcodes)](https://openindex.co.uk/postcode/cm6-9)

## Council

[Uttlesford](https://openindex.co.uk/uttlesford)

## Towns in CM6

[Great Dunmow](https://openindex.co.uk/town/great-dunmow)

## Postcode districts next to CM6

[CB10](https://openindex.co.uk/postcode/cb10), [CB11](https://openindex.co.uk/postcode/cb11), [CM1](https://openindex.co.uk/postcode/cm1), [CM3](https://openindex.co.uk/postcode/cm3), [CM5](https://openindex.co.uk/postcode/cm5), [CM7](https://openindex.co.uk/postcode/cm7), [CM17](https://openindex.co.uk/postcode/cm17), [CM22](https://openindex.co.uk/postcode/cm22), [CM24](https://openindex.co.uk/postcode/cm24), [CM77](https://openindex.co.uk/postcode/cm77)

## More in the CM postcode area

[All CM postcode districts](https://openindex.co.uk/postcode/cm), [Every UK postcode area](https://openindex.co.uk/postcode)

## CM6 in brief

CM6 is a postcode district covering Great Dunmow, in Uttlesford.
About 30,658 people lived in CM6 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £465,000 in 2025 across 616 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 50.1 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CM6 was £465,000 in 2025.
CM6 had 29,394 usual residents at the census.
About 0% of people in CM6 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In CM6, 87.2% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: CM6
- Postcode area: [CM](https://openindex.co.uk/postcode/cm)
- Constituency: [North West Essex †](https://openindex.co.uk/constituency/north-west-essex)
- Council: [Uttlesford †](https://openindex.co.uk/uttlesford)
- Area: 191 km²
- People, mid-2024: 30,658*
- Neighbourhoods: 17
- Output areas: 84

* People: worked out by Open Index from neighbourhood estimates, shared out by where people lived at the census (by area in Northern Ireland). This area's edges do not follow neighbourhood edges, so the figure is close but not exact.
† Best fit: the constituency, council, region and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[CM22](https://openindex.co.uk/postcode/cm22), [CM3](https://openindex.co.uk/postcode/cm3), [CM7](https://openindex.co.uk/postcode/cm7), [CM1](https://openindex.co.uk/postcode/cm1), [CM5](https://openindex.co.uk/postcode/cm5), [CB10](https://openindex.co.uk/postcode/cb10)

## Latest updates for CM6

- August 2026 house prices published: HM Land Registry and partners · Oct 2026.
- September 2026 rent published: ONS private rents · Oct 2026.
- Dental practices updated: NHS England · Oct 2026.
- Schools updated: Ofsted · Oct 2026.

The same figures as JSON: https://openindex.co.uk/v1/places/CM6

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/cm6, or to one figure with its anchor, https://openindex.co.uk/postcode/cm6#f-house-sales-median-price.

Open Index's own text and the figures it works out are licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source data keeps its publishers' licences, named with each figure. Give each figure's period and source with it.

Snapshot 2026.10.9. The HTML page: https://openindex.co.uk/postcode/cm6