# CO9

Postcode district covering Halstead and Sible Hedingham, in Braintree.

CO9 is a postcode district covering Halstead and Sible Hedingham, in Braintree. Median sale price £342,500 in 2025. Recorded crime 49.1 per 1,000 people.

Postcode district. Code CO9. In: [Postcodes](https://openindex.co.uk/postcode) › [CO](https://openindex.co.uk/postcode/co)

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 CO9 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £342,500** (2025). The median price paid for a home in CO9 was £342,500 in 2025. Joint 842nd 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/co9#f-house-sales-median-price
- **Population: 27,892** (2021). CO9 had 27,892 usual residents at the census (ONS Census 2021). 1,036th 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/co9#f-population
- **People in radon Affected Area squares: 0%** (2022). About 0% of people in CO9 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/co9#f-radon-affected-share
- **Gigabit broadband coverage: 83.4%** (January 2026). In CO9, 83.4% 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/co9#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=CO9) (Worked out by Open Index · 2022): About 0% of people in CO9 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=CO9) (Worked out by Open Index · 2025): 402 homes were sold in CO9 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=CO9) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for CO9.
- [Population by postcode district](https://openindex.co.uk/map/population?place=CO9) (Census 2021, England and Wales): CO9 had 27,892 usual residents at the census.

## How CO9 compares

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

| Measure | CO9 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £342,500 | 7th most expensive | 16 postcode districts, CO · 2025 |
| Population | 27,892 | 8th least populated | 16 postcode districts, CO · 2021 |
| People in radon Affected Area squares | 0% | joint fewest people in radon Affected Areas | 16 postcode districts, CO · 2022 |
| Gigabit broadband coverage | 83.4% | 7th highest | 16 postcode districts, CO · Jan 2026 |

## Is CO9 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in CO9 at a rate of 49.1 per 1,000 people.
That compares with 83.5 per 1,000 people across the CO postcode area.
In August 2026 alone, 157 cases of crime and anti-social behaviour were recorded in CO9.
In the 12 months to August 2026, the most common types were violence and sexual offences (635), other crime (288) and anti-social behaviour (129).
A year earlier, the recorded crime rate in CO9 was 53.7 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 CO9, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so CO9 has no single figure. Of its 15 neighbourhoods with a rank:
- Decile 2: 1 neighbourhood
- Decile 4: 2 neighbourhoods
- Decile 5: 5 neighbourhoods
- Decile 6: 2 neighbourhoods
- Decile 7: 1 neighbourhood
- Decile 8: 2 neighbourhoods
- Decile 9: 2 neighbourhoods

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

## Neighbourhoods in CO9

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Braintree 001C](https://openindex.co.uk/braintree/neighbourhood/e01021414) | 2,217 | 28.8 per 1,000 | 4 | 96.5% |
| [Braintree 001D](https://openindex.co.uk/braintree/neighbourhood/e01021430) | 2,303 | 48.0 per 1,000 | 5 | 87.1% |
| [Braintree 002A](https://openindex.co.uk/braintree/neighbourhood/e01021398) | 1,470 | 35.4 per 1,000 | 6 | 89.5% |
| [Braintree 003A](https://openindex.co.uk/braintree/neighbourhood/e01021382) | 1,944 | 25.3 per 1,000 | 9 | 80.2% |
| [Braintree 003B](https://openindex.co.uk/braintree/neighbourhood/e01021397) | 2,458 | 47.9 per 1,000 | 7 | 82.7% |
| [Braintree 003C](https://openindex.co.uk/braintree/neighbourhood/e01021399) | 1,692 | 39.5 per 1,000 | 5 | 82.4% |
| [Braintree 003D](https://openindex.co.uk/braintree/neighbourhood/e01021400) | 1,725 | 31.3 per 1,000 | 6 | 91.8% |
| [Braintree 004A](https://openindex.co.uk/braintree/neighbourhood/e01021387) | 2,120 | 109.2 per 1,000 | 4 | 68.7% |
| [Braintree 004B](https://openindex.co.uk/braintree/neighbourhood/e01021388) | 1,780 | 92.2 per 1,000 | 5 | 80.2% |
| [Braintree 004C](https://openindex.co.uk/braintree/neighbourhood/e01021391) | 1,676 | 60.2 per 1,000 | 2 | 97.3% |
| [Braintree 004D](https://openindex.co.uk/braintree/neighbourhood/e01021392) | 1,735 | 46.4 per 1,000 | 5 | 63.9% |
| [Braintree 004E](https://openindex.co.uk/braintree/neighbourhood/e01021393) | 1,574 | 66.6 per 1,000 | 5 | 86.1% |
| [Braintree 006A](https://openindex.co.uk/braintree/neighbourhood/e01021389) | 2,165 | 40.3 per 1,000 | 8 | 67.2% |
| [Braintree 006B](https://openindex.co.uk/braintree/neighbourhood/e01021390) | 1,859 | 31.6 per 1,000 | 9 | 99.0% |
| [Braintree 007F](https://openindex.co.uk/braintree/neighbourhood/e01021381) | 1,225 | 51.7 per 1,000 | 8 | 94.2% |

## Your MP

- [Braintree](https://openindex.co.uk/constituency/braintree): Sir James Cleverly (Conservative), MP since July 2024. 97% of the people here.
- [Witham](https://openindex.co.uk/constituency/witham): Priti Patel (Conservative), MP since July 2024. 3.0% 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 CO9

[Halstead Central & West](https://openindex.co.uk/braintree/halstead-central-and-west), [Hedingham, Gosfield & Greenstead Green](https://openindex.co.uk/braintree/hedingham-gosfield-and-greenstead-green)

## Postcode sectors in CO9

[CO9 1 (293 postcodes)](https://openindex.co.uk/postcode/co9-1), [CO9 2 (249 postcodes)](https://openindex.co.uk/postcode/co9-2), [CO9 3 (194 postcodes)](https://openindex.co.uk/postcode/co9-3), [CO9 4 (176 postcodes)](https://openindex.co.uk/postcode/co9-4), [CO9 9 (16 postcodes)](https://openindex.co.uk/postcode/co9-9)

## Council

[Braintree](https://openindex.co.uk/braintree)

## Towns in CO9

[Halstead](https://openindex.co.uk/town/halstead)

## Postcode districts next to CO9

[CB9](https://openindex.co.uk/postcode/cb9), [CM7](https://openindex.co.uk/postcode/cm7), [CM77](https://openindex.co.uk/postcode/cm77), [CO6](https://openindex.co.uk/postcode/co6), [CO8](https://openindex.co.uk/postcode/co8), [CO10](https://openindex.co.uk/postcode/co10)

## More in the CO postcode area

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

## CO9 in brief

CO9 is a postcode district covering Halstead and Sible Hedingham, in Braintree.
About 29,168 people lived in CO9 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £342,500 in 2025 across 402 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 49.1 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in CO9 was £342,500 in 2025.
CO9 had 27,892 usual residents at the census.
About 0% of people in CO9 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In CO9, 83.4% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: CO9
- Postcode area: [CO](https://openindex.co.uk/postcode/co)
- Constituency: [Braintree †](https://openindex.co.uk/constituency/braintree)
- Council: [Braintree †](https://openindex.co.uk/braintree)
- Area: 160 km²
- People, mid-2024: 29,168*
- Neighbourhoods: 15
- Output areas: 90

* 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

[CO10](https://openindex.co.uk/postcode/co10), [CM7](https://openindex.co.uk/postcode/cm7), [CO6](https://openindex.co.uk/postcode/co6), [CB9](https://openindex.co.uk/postcode/cb9), [CM77](https://openindex.co.uk/postcode/cm77), [CO8](https://openindex.co.uk/postcode/co8)

## Latest updates for CO9

- 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/CO9

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/co9, or to one figure with its anchor, https://openindex.co.uk/postcode/co9#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/co9