# DL12

Postcode district covering Barnard Castle, in County Durham.

DL12 is a postcode district covering Barnard Castle, in County Durham. Median sale price £251,250 in 2025. Recorded crime 71.2 per 1,000 people.

Postcode district. Code DL12. In: [Postcodes](https://openindex.co.uk/postcode) › [DL](https://openindex.co.uk/postcode/dl)

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 DL12 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £251,250** (2025). The median price paid for a home in DL12 was £251,250 in 2025. 778th cheapest 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/dl12#f-house-sales-median-price
- **Population: 12,418** (2021). DL12 had 12,418 usual residents at the census (ONS Census 2021). 867th least 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/dl12#f-population
- **People in radon Affected Area squares: 97%** (2022). About 97% of people in DL12 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/dl12#f-radon-affected-share
- **Gigabit broadband coverage: 69.5%** (January 2026). In DL12, 69.5% 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/dl12#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas?place=DL12) (Worked out by Open Index · 2022): About 97% of people in DL12 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=DL12) (Worked out by Open Index · 2025): 204 homes were sold in DL12 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime?place=DL12) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for DL12.
- [Population by postcode district](https://openindex.co.uk/map/population?place=DL12) (Census 2021, England and Wales): DL12 had 12,418 usual residents at the census.

## How DL12 compares

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

| Measure | DL12 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £251,250 | 3rd most expensive | 17 postcode districts, DL · 2025 |
| Population | 12,418 | 3rd least populated | 17 postcode districts, DL · 2021 |
| People in radon Affected Area squares | 97% | joint 2nd most people in radon Affected Areas | 17 postcode districts, DL · 2022 |
| Gigabit broadband coverage | 69.5% | 4th lowest | 17 postcode districts, DL · Jan 2026 |

## Is DL12 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in DL12 at a rate of 71.2 per 1,000 people.
That compares with 111.8 per 1,000 people across the DL postcode area.
In August 2026 alone, 88 cases of crime and anti-social behaviour were recorded in DL12.
In the 12 months to August 2026, the most common types were violence and sexual offences (350), other crime (209) and anti-social behaviour (100).
A year earlier, the recorded crime rate in DL12 was 66.8 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 DL12, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so DL12 has no single figure. Of its 7 neighbourhoods with a rank:
- Decile 3: 1 neighbourhood
- Decile 4: 1 neighbourhood
- Decile 5: 2 neighbourhoods
- Decile 7: 2 neighbourhoods
- Decile 9: 1 neighbourhood

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

## Neighbourhoods in DL12

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [County Durham 067A](https://openindex.co.uk/county-durham/neighbourhood/e01034511) | 2,191 | 44.1 per 1,000 | 4 | 85.4% |
| [County Durham 067B](https://openindex.co.uk/county-durham/neighbourhood/e01020857) | 1,460 | 55.4 per 1,000 | 5 | 92.0% |
| [County Durham 067C](https://openindex.co.uk/county-durham/neighbourhood/e01020855) | 1,146 | 28.3 per 1,000 | 9 | 34.8% |
| [County Durham 067D](https://openindex.co.uk/county-durham/neighbourhood/e01020853) | 1,785 | 57.0 per 1,000 | 7 | 86.1% |
| [County Durham 067E](https://openindex.co.uk/county-durham/neighbourhood/e01020852) | 1,657 | 106.4 per 1,000 | 3 | 31.1% |
| [County Durham 067F](https://openindex.co.uk/county-durham/neighbourhood/e01020854) | 2,586 | 117.1 per 1,000 | 7 | 60.8% |
| [County Durham 067G](https://openindex.co.uk/county-durham/neighbourhood/e01020863) | 1,320 | 52.7 per 1,000 | 5 | 85.2% |

## Your MP

- [Bishop Auckland](https://openindex.co.uk/constituency/bishop-auckland): Dr Sam Rushworth (Labour), MP since July 2024. 100% of the people here.
- [Richmond and Northallerton](https://openindex.co.uk/constituency/richmond-and-northallerton): Rishi Sunak (Conservative), MP since July 2024. 0.3% of the people here.
- [Westmorland and Lonsdale](https://openindex.co.uk/constituency/westmorland-and-lonsdale): Tim Farron (Liberal Democrat), MP since July 2024. 0.1% 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 DL12

[Barnard Castle & Upper Teesdale](https://openindex.co.uk/county-durham/barnard-castle-and-upper-teesdale)

## Postcode sectors in DL12

[DL12 0 (220 postcodes)](https://openindex.co.uk/postcode/dl12-0), [DL12 2 (1 postcode)](https://openindex.co.uk/postcode/dl12-2), [DL12 8 (272 postcodes)](https://openindex.co.uk/postcode/dl12-8), [DL12 9 (233 postcodes)](https://openindex.co.uk/postcode/dl12-9)

## Council

[County Durham](https://openindex.co.uk/county-durham)

## Postcode districts next to DL12

[CA9](https://openindex.co.uk/postcode/ca9), [CA16](https://openindex.co.uk/postcode/ca16), [CA17](https://openindex.co.uk/postcode/ca17), [DL2](https://openindex.co.uk/postcode/dl2), [DL11](https://openindex.co.uk/postcode/dl11), [DL13](https://openindex.co.uk/postcode/dl13)

## More in the DL postcode area

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

## DL12 in brief

DL12 is a postcode district covering Barnard Castle, in County Durham.
About 12,690 people lived in DL12 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £251,250 in 2025 across 204 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 71.2 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in DL12 was £251,250 in 2025.
DL12 had 12,418 usual residents at the census.
About 97% of people in DL12 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In DL12, 69.5% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: DL12
- Postcode area: [DL](https://openindex.co.uk/postcode/dl)
- Constituency: [Bishop Auckland †](https://openindex.co.uk/constituency/bishop-auckland)
- Council: [County Durham †](https://openindex.co.uk/county-durham)
- Area: 560 km²
- People, mid-2024: 12,690*
- Neighbourhoods: 7
- Output areas: 47

* 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

[DL11](https://openindex.co.uk/postcode/dl11), [DL13](https://openindex.co.uk/postcode/dl13), [DL2](https://openindex.co.uk/postcode/dl2), [CA17](https://openindex.co.uk/postcode/ca17), [CA16](https://openindex.co.uk/postcode/ca16), [CA9](https://openindex.co.uk/postcode/ca9)

## Latest updates for DL12

- 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/DL12

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/dl12, or to one figure with its anchor, https://openindex.co.uk/postcode/dl12#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/dl12