# NP12

Postcode district covering Blackwood and Cefn Fforest, in Caerphilly.

NP12 is a postcode district covering Blackwood and Cefn Fforest, in Caerphilly. Median sale price £206,500 in 2025. Recorded crime 110.7 per 1,000 people.

Postcode district. Code NP12. In: [Postcodes](https://openindex.co.uk/postcode) › [NP](https://openindex.co.uk/postcode/np)

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 NP12 postcode. [How census figures are added up](https://openindex.co.uk/sources/population)

## Key figures

- **Median sale price: £206,500** (2025). The median price paid for a home in NP12 was £206,500 in 2025. Joint 436th 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/np12#f-house-sales-median-price
- **Population: 33,274** (2021). NP12 had 33,274 usual residents at the census (ONS Census 2021). 739th 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/np12#f-population
- **People in radon Affected Area squares: 95%** (2022). About 95% of people in NP12 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/np12#f-radon-affected-share
- **Gigabit broadband coverage: 93.8%** (January 2026). In NP12, 93.8% 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/np12#f-gigabit-coverage

## On the map

- [Radon Affected Area by postcode district](https://openindex.co.uk/map/radon-affected-areas#place=NP12) (Worked out by Open Index · 2022): About 95% of people in NP12 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=NP12) (Worked out by Open Index · 2025): 444 homes were sold in NP12 in 2025.
- [Crime and ASB by postcode district](https://openindex.co.uk/map/recorded-crime#place=NP12) (Police recorded crime and outcomes (data.police.uk) · August 2026): Crime and anti-social behaviour for NP12.
- [Population by postcode district](https://openindex.co.uk/map/population#place=NP12) (Census 2021, England and Wales): NP12 had 33,274 usual residents at the census.

## How NP12 compares

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

| Measure | NP12 | Rank | Compared with |
| --- | --- | --- | --- |
| Median sale price | £206,500 | 7th cheapest | 18 postcode districts, NP · 2025 |
| Population | 33,274 | 6th most populated | 18 postcode districts, NP · 2021 |
| People in radon Affected Area squares | 95% | 8th most people in radon Affected Areas | 18 postcode districts, NP · 2022 |
| Gigabit broadband coverage | 93.8% | 2nd highest | 18 postcode districts, NP · Jan 2026 |

## Is NP12 safe? What police records show

In the 12 months to August 2026, police recorded crimes and anti-social behaviour in NP12 at a rate of 110.7 per 1,000 people.
In August 2026 alone, 394 cases of crime and anti-social behaviour were recorded in NP12.
In the 12 months to August 2026, the most common types were violence and sexual offences (1,366), anti-social behaviour (689) and other crime (634).
A year earlier, the recorded crime rate in NP12 was 103.8 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 NP12, neighbourhood by neighbourhood

- Deprivation is ranked by neighbourhood, so NP12 has no single figure. Of its 20 neighbourhoods with a rank:
- Decile 2: 5 neighbourhoods
- Decile 3: 2 neighbourhoods
- Decile 4: 2 neighbourhoods
- Decile 5: 1 neighbourhood
- Decile 6: 5 neighbourhoods
- Decile 9: 3 neighbourhoods
- Decile 10 (Wales’s least deprived 10%): 2 neighbourhoods

Source: Welsh Index of Multiple Deprivation 2025. Decile 1 is the most deprived tenth of neighbourhoods in Wales.

## Neighbourhoods in NP12

| Area | People (census) | Recorded crime per 1,000 | Deprivation decile | Gigabit broadband |
| --- | --- | --- | --- | --- |
| [Caerphilly 005A](https://openindex.co.uk/caerphilly/neighbourhood/w01001334) | 1,446 | 126.5 per 1,000 | 2 | 99.2% |
| [Caerphilly 005B](https://openindex.co.uk/caerphilly/neighbourhood/w01001335) | 1,262 | 75.8 per 1,000 | 5 | 70.7% |
| [Caerphilly 005C](https://openindex.co.uk/caerphilly/neighbourhood/w01001347) | 1,501 | 104.8 per 1,000 | 6 | 98.3% |
| [Caerphilly 005D](https://openindex.co.uk/caerphilly/neighbourhood/w01001351) | 1,393 | 56.9 per 1,000 | 9 | 97.2% |
| [Caerphilly 006E](https://openindex.co.uk/caerphilly/neighbourhood/w01001390) | 2,107 | 56.0 per 1,000 | 10 | 98.5% |
| [Caerphilly 006F](https://openindex.co.uk/caerphilly/neighbourhood/w01001391) | 1,617 | 71.9 per 1,000 | 6 | 91.5% |
| [Caerphilly 007A](https://openindex.co.uk/caerphilly/neighbourhood/w01001352) | 1,748 | 141.0 per 1,000 | 2 | 99.7% |
| [Caerphilly 007B](https://openindex.co.uk/caerphilly/neighbourhood/w01001353) | 1,531 | 161.3 per 1,000 | 2 | 97.5% |
| [Caerphilly 007C](https://openindex.co.uk/caerphilly/neighbourhood/w01001387) | 1,191 | 104.5 per 1,000 | 3 | 82.4% |
| [Caerphilly 007D](https://openindex.co.uk/caerphilly/neighbourhood/w01001388) | 1,823 | 125.6 per 1,000 | 3 | 93.1% |
| [Caerphilly 007E](https://openindex.co.uk/caerphilly/neighbourhood/w01001389) | 1,100 | 35.4 per 1,000 | 6 | 98.8% |
| [Caerphilly 009A](https://openindex.co.uk/caerphilly/neighbourhood/w01001348) | 1,757 | 127.0 per 1,000 | 2 | 94.1% |
| [Caerphilly 009B](https://openindex.co.uk/caerphilly/neighbourhood/w01001349) | 1,717 | 72.4 per 1,000 | 9 | 99.7% |
| [Caerphilly 009C](https://openindex.co.uk/caerphilly/neighbourhood/w01001350) | 1,736 | 346.6 per 1,000 | 6 | 81.6% |
| [Caerphilly 009D](https://openindex.co.uk/caerphilly/neighbourhood/w01001392) | 1,934 | 63.3 per 1,000 | 9 | 89.9% |
| [Caerphilly 011A](https://openindex.co.uk/caerphilly/neighbourhood/w01001401) | 2,067 | 95.5 per 1,000 | 4 | 92.0% |
| [Caerphilly 011B](https://openindex.co.uk/caerphilly/neighbourhood/w01001402) | 1,600 | 95.2 per 1,000 | 2 | 100.0% |
| [Caerphilly 011C](https://openindex.co.uk/caerphilly/neighbourhood/w01001403) | 1,589 | 167.2 per 1,000 | 6 | 98.6% |
| [Caerphilly 011D](https://openindex.co.uk/caerphilly/neighbourhood/w01001404) | 1,347 | 56.0 per 1,000 | 10 | 100.0% |
| [Caerphilly 011E](https://openindex.co.uk/caerphilly/neighbourhood/w01001405) | 1,778 | 99.9 per 1,000 | 4 | 99.5% |

## Your MP

- [Newport West and Islwyn](https://openindex.co.uk/constituency/newport-west-and-islwyn): Ruth Jones (Labour), MP since July 2024. 59% of the people here.
- [Caerphilly](https://openindex.co.uk/constituency/caerphilly): Chris Evans (Labour (Co-op)), MP since July 2024. 40% of the people here.
- [Blaenau Gwent and Rhymney](https://openindex.co.uk/constituency/blaenau-gwent-and-rhymney): Nick Smith (Labour), MP since July 2024. 0.7% 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 NP12

[Blackwood](https://openindex.co.uk/caerphilly/blackwood), [North Blackwood, Argoed & Markham](https://openindex.co.uk/caerphilly/north-blackwood-argoed-and-markham), [Pengam & Cefn Fforest](https://openindex.co.uk/caerphilly/pengam-and-cefn-fforest), [Pontllan-fraith](https://openindex.co.uk/caerphilly/pontllan-fraith)

## Postcode sectors in NP12

[NP12 0 (243 postcodes)](https://openindex.co.uk/postcode/np12-0), [NP12 1 (207 postcodes)](https://openindex.co.uk/postcode/np12-1), [NP12 2 (258 postcodes)](https://openindex.co.uk/postcode/np12-2), [NP12 3 (191 postcodes)](https://openindex.co.uk/postcode/np12-3), [NP12 4 (4 postcodes)](https://openindex.co.uk/postcode/np12-4), [NP12 9 (1 postcode)](https://openindex.co.uk/postcode/np12-9)

## Council

[Caerphilly](https://openindex.co.uk/caerphilly)

## Towns in NP12

[Blackwood](https://openindex.co.uk/town/blackwood), [Pontllanfraith](https://openindex.co.uk/town/pontllanfraith)

## Postcode districts next to NP12

[CF81](https://openindex.co.uk/postcode/cf81), [CF82](https://openindex.co.uk/postcode/cf82), [NP11](https://openindex.co.uk/postcode/np11), [NP13](https://openindex.co.uk/postcode/np13), [NP22](https://openindex.co.uk/postcode/np22), [NP23](https://openindex.co.uk/postcode/np23), [NP24](https://openindex.co.uk/postcode/np24)

## Nearest rail stations

[Pengam (2.4 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-3.2301,51.6705), [Hengoed (2.8 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-3.2241,51.6474), [Gilfach Fargoed (2.9 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-3.2266,51.6842), [Newbridge (3.7 km from the middle)](https://openindex.co.uk/map/rail-stations#around=-3.1429,51.6658)

## More in the NP postcode area

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

## NP12 in brief

NP12 is a postcode district covering Blackwood and Cefn Fforest, in Caerphilly.
About 33,417 people lived in NP12 in mid-2024 (worked out by Open Index from ONS small-area estimates); the median price paid for a home was £206,500 in 2025 across 444 sales (HM Land Registry) and police recorded crimes and anti-social behaviour at a rate of 110.7 per 1,000 people in the 12 months to August 2026 (police.uk).
The median price paid for a home in NP12 was £206,500 in 2025.
NP12 had 33,274 usual residents at the census.
About 95% of people in NP12 live in a 1 km square that the radon atlas marks as a radon Affected Area.
In NP12, 93.8% of homes and businesses could get gigabit-capable broadband in January 2026.

## About

- Type: Postcode district
- Code: NP12
- Postcode area: [NP](https://openindex.co.uk/postcode/np)
- Constituency: [Newport West and Islwyn †](https://openindex.co.uk/constituency/newport-west-and-islwyn)
- Council: [Caerphilly †](https://openindex.co.uk/caerphilly)
- Area: 34.91 km²
- People, mid-2024: 33,417*
- Neighbourhoods: 20
- Output areas: 103

* 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 and nation this postcode district mostly lies in. Its edges do not follow theirs.

## Next door

[NP11](https://openindex.co.uk/postcode/np11), [CF82](https://openindex.co.uk/postcode/cf82), [NP23](https://openindex.co.uk/postcode/np23), [CF81](https://openindex.co.uk/postcode/cf81), [NP22](https://openindex.co.uk/postcode/np22), [NP13](https://openindex.co.uk/postcode/np13)

## Latest updates for NP12

- 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/NP12

## How to cite

Source: Open Index, openindex.co.uk. Link to this page, https://openindex.co.uk/postcode/np12, or to one figure with its anchor, https://openindex.co.uk/postcode/np12#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 2026.10.11. The HTML page: https://openindex.co.uk/postcode/np12