# CM17

Postcode district covering Harlow, Church Langley and Churchgate Street, in Harlow and Epping Forest.

CM17 is a postcode district covering Harlow, Church Langley and Churchgate Street, in Harlow and Epping Forest. Median sale price £406,000 in 2025.

Postcode district. Code CM17. 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 CM17 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £406,000** (2025). The median price paid for a home in CM17 was £406,000 in 2025. 575th 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/cm17#f-house-sales-median-price
- **Population: 25,930** (2021). CM17 had 25,930 usual residents at the census (ONS Census 2021). 1,121st 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/cm17#f-population
- **People in radon Affected Area squares: 12%** (2022). About 12% of people in CM17 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/cm17#f-radon-affected-share
- **Gigabit broadband coverage: 90.8%** (January 2026). In CM17, 90.8% 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/cm17#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=CM17) (Worked out by Open Index · 2022): About 12% of people in CM17 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=CM17) (Worked out by Open Index · 2025): 430 homes were sold in CM17 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=CM17) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for CM17.
- [Population by postcode district](https://openindex.co.uk/map/population?place=CM17) (Census 2021, England and Wales): CM17 had 25,930 usual residents at the census.

## How CM17 compares

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

| Measure | CM17 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £406,000 | 11th cheapest | 25 postcode districts, CM · 2025 |
| Population | 25,930 | 10th most populated | 27 postcode districts, CM · 2021 |
| People in radon Affected Area squares | 12% | 4th most people in radon Affected Areas | 27 postcode districts, CM · 2022 |
| Gigabit broadband coverage | 90.8% | 9th highest | 27 postcode districts, CM · Jan 2026 |

## Is CM17 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CM17 at a rate of 67.4 per 1,000 people.
That compares with 77.3 per 1,000 people across the CM postcode area.
In August 2026 alone, 208 cases of crime and anti-social behaviour were recorded in CM17.
In the 12 months to August 2026, the most common types were violence and sexual offences (698), other crime (367) and anti-social behaviour (226).
A year earlier, the recorded crime rate in CM17 was 62.6 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 CM17, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so CM17 has no single figure. Of its 16 neighbourhoods with a rank:
- Decile 3: 1 neighbourhood
- Decile 4: 1 neighbourhood
- Decile 5: 2 neighbourhoods
- Decile 6: 4 neighbourhoods
- Decile 7: 1 neighbourhood
- Decile 8: 2 neighbourhoods
- Decile 9: 5 neighbourhoods

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

## Neighbourhoods in CM17

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Epping Forest 001A](https://openindex.co.uk/epping-forest/neighbourhood/e01021768) | 2,350 | 152.0 per 1,000 | 6 | 60.1% |
| [Harlow 001A](https://openindex.co.uk/harlow/neighbourhood/e01021854) | 2,215 | 59.7 per 1,000 | 5 | 98.3% |
| [Harlow 001B](https://openindex.co.uk/harlow/neighbourhood/e01021855) | 1,550 | 82.4 per 1,000 | 6 | 91.2% |
| [Harlow 001C](https://openindex.co.uk/harlow/neighbourhood/e01021856) | 1,507 | 47.8 per 1,000 | 6 | 95.1% |
| [Harlow 001E](https://openindex.co.uk/harlow/neighbourhood/e01034362) | 1,513 | 47.5 per 1,000 | 8 | 96.1% |
| [Harlow 001F](https://openindex.co.uk/harlow/neighbourhood/e01034363) | 1,267 | 88.0 per 1,000 | 7 | 87.0% |
| [Harlow 001G](https://openindex.co.uk/harlow/neighbourhood/e01034364) | 1,696 | 26.8 per 1,000 | 9 | 98.4% |
| [Harlow 001H](https://openindex.co.uk/harlow/neighbourhood/e01034365) | 1,436 | 88.8 per 1,000 | 8 | 95.7% |
| [Harlow 005A](https://openindex.co.uk/harlow/neighbourhood/e01021824) | 1,763 | 36.5 per 1,000 | 9 | 100.0% |
| [Harlow 005B](https://openindex.co.uk/harlow/neighbourhood/e01021825) | 1,623 | 34.0 per 1,000 | 9 | 99.5% |
| [Harlow 005C](https://openindex.co.uk/harlow/neighbourhood/e01021826) | 1,525 | 26.2 per 1,000 | 9 | 97.2% |
| [Harlow 005D](https://openindex.co.uk/harlow/neighbourhood/e01021827) | 1,688 | 79.8 per 1,000 | 6 | 81.9% |
| [Harlow 005E](https://openindex.co.uk/harlow/neighbourhood/e01021828) | 2,342 | 26.2 per 1,000 | 9 | 99.5% |
| [Harlow 008B](https://openindex.co.uk/harlow/neighbourhood/e01021834) | 1,598 | 72.5 per 1,000 | 4 | 98.2% |
| [Harlow 008C](https://openindex.co.uk/harlow/neighbourhood/e01021835) | 1,503 | 82.1 per 1,000 | 5 | 97.3% |
| [Harlow 008D](https://openindex.co.uk/harlow/neighbourhood/e01021836) | 1,544 | 133.7 per 1,000 | 3 | 94.1% |

## Your MP

- [Harlow](https://openindex.co.uk/constituency/harlow): Chris Vince (Labour (Co-op)), MP since July 2024. 99% of the people here.
- [Brentwood and Ongar](https://openindex.co.uk/constituency/brentwood-and-ongar): Alex Burghart (Conservative), MP since July 2024. 1.3% 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 CM17

[Church Langley](https://openindex.co.uk/harlow/church-langley), [Old Harlow & Newhall](https://openindex.co.uk/harlow/old-harlow-and-newhall), [Potter Street](https://openindex.co.uk/harlow/potter-street)

## Postcode sectors in CM17

[CM17 0 (241 postcodes)](https://openindex.co.uk/postcode/cm17-0), [CM17 9 (288 postcodes)](https://openindex.co.uk/postcode/cm17-9)

## Councils CM17 covers

[Harlow](https://openindex.co.uk/harlow), [Epping Forest](https://openindex.co.uk/epping-forest)

## Towns in CM17

[Harlow](https://openindex.co.uk/harlow)

## Postcode districts next to CM17

[CM5](https://openindex.co.uk/postcode/cm5), [CM6](https://openindex.co.uk/postcode/cm6), [CM16](https://openindex.co.uk/postcode/cm16), [CM18](https://openindex.co.uk/postcode/cm18), [CM19](https://openindex.co.uk/postcode/cm19), [CM20](https://openindex.co.uk/postcode/cm20), [CM21](https://openindex.co.uk/postcode/cm21), [CM22](https://openindex.co.uk/postcode/cm22)

## Nearest rail stations

[Harlow Mill (2.2 km from the middle)](https://openindex.co.uk/map/rail-stations?around=0.1323,51.7904), [Harlow Town (4.1 km from the middle)](https://openindex.co.uk/map/rail-stations?around=0.0951,51.7811), [Sawbridgeworth (4.3 km from the middle)](https://openindex.co.uk/map/rail-stations?around=0.1604,51.8143)

## 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)

## CM17 in brief

CM17 is a postcode district covering Harlow, Church Langley and Churchgate Street, in Harlow and Epping Forest.
About 28,336 people lived in CM17 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £406,000 in 2025 across 430 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 67.4 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CM17 was £406,000 in 2025.
CM17 had 25,930 usual residents at the census.
About 12% of people in CM17 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In CM17, 90.8% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: CM17
- Postcode area: [CM](https://openindex.co.uk/postcode/cm)
- Constituency: [Harlow †](https://openindex.co.uk/constituency/harlow)
- Council: [Harlow †](https://openindex.co.uk/harlow)
- Area: 35.95 km²
- People, mid-2024: 28,336*
- Neighbourhoods: 16
- 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

[CM5](https://openindex.co.uk/postcode/cm5), [CM22](https://openindex.co.uk/postcode/cm22), [CM16](https://openindex.co.uk/postcode/cm16), [CM21](https://openindex.co.uk/postcode/cm21), [CM18](https://openindex.co.uk/postcode/cm18), [CM20](https://openindex.co.uk/postcode/cm20)

## Latest updates for CM17

- 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/CM17

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/cm17, or to one figure with its anchor, https://openindex.co.uk/postcode/cm17#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/cm17