Property market
The five-year median is £155,000 from 4 recorded sales in NP12 3LN. This is a recorded-sale statistic, not a current valuation.
The latest UK House Price Index average for Caerphilly is £197,272 in June 2026, up 5.9% year on year.
NP12 3LN
Cefn Fforest and Pengam · Caerphilly · Wales
Updated September 2026
Compare this postcodeLocation overview
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- Post town
- Blackwood
- Local authority
- Caerphilly
- Constituency
- Newport West and Islwyn
- Postcode district
- NP12
- Postcode sector
- NP12 3
Nearby postcodes
Complete postcode fields and official codes
- Postcode
- NP12 3LN
- Status
- Current
- Introduced
- 1 June 1999
- Terminated
- Not published
- Postcode area
- NP
- Postcode district
- NP12
- Postcode sector
- NP12 3
- Latitude
- 51.673519
- Longitude
- -3.213112
- British National Grid easting
- 316,211
- British National Grid northing
- 197,891
Statistical and administrative geographies
- Country
- Wales · W92000004
- Region
- W99999999
- Local authority district
- Caerphilly · W06000018
- Electoral ward
- Cefn Fforest and Pengam · W05001654
- Parish or community
- W04000905
- Westminster constituency
- Newport West and Islwyn · W07000105
- Output area
- W00007084
- Lower layer super output area
- Caerphilly 007A · W01001352
- Middle layer super output area
- Caerphilly 007 · W02000296
Postcode source versions
- Ordnance Survey: Code-Point Open Version 2026-08 · Current postcode units in Great Britain · OGL-3.0
- Office for National Statistics: ONS Postcode Directory Version 2026-08 · United Kingdom; Northern Ireland excluded pending rights review; Crown Dependencies outside product scope · OGL-3.0 with third-party rights
- Ordnance Survey: Boundary-Line Version 2026-05 · Local-authority boundaries in Great Britain · OS OpenData Licence
Explore NP12
Property
23 recorded
sales at this postcode
| Address | Date | Price |
|---|---|---|
| 76, Derwendeg Avenue, Cefn Fforest, Blackwood, NP12 3LN | 10 October 2025 | £184,000 |
| 52, Derwendeg Avenue, Cefn Fforest, Blackwood, NP12 3LN | 30 May 2024 | £131,000 |
| 76, Derwendeg Avenue, Cefn Fforest, Blackwood, NP12 3LN | 20 December 2023 | £90,000 |
Schools
Within 3.1 miles of this postcode
- Open schools
- 34
- Primary
- 0
- Secondary
- 0
- 222 m
Cefn Fforest Primary School
Welsh establishment
- 697 m
Blackwood Comprehensive School
Welsh establishment
- 793 m
The Lewis School
Welsh establishment
Recorded crime
Within 1 mile of this postcode
- Published events
- 2,100
- Months covered
- 12
- Latest month
- June 2026
Most recorded categories in this period
- Violence and sexual offences 826
- Anti social behaviour 269
- Criminal damage and arson 242
- Public order 229
- Vehicle crime 126
Census 2021
Population and age profile
- Postcode residents
- 58
- Postcode households
- 25
- Residents per household
- 2.3
- NP12 3 residents
- 7,866
30 female, 28 male
Age bands in NP12 3
Wider postcode sector- Age 0 to 14
- 16.6%
- Age 15 to 24
- 11.1%
- Age 25 to 44
- 24.3%
- Age 45 to 64
- 27.3%
- Age 65 and over
- 20.6%
1,297 residents
869 residents
1,898 residents
2,133 residents
1,608 residents
This postcode contained 0.7% of the sector's usual residents on Census Day. The age profile describes the wider NP12 3 sector, not people in this individual postcode.
Small counts are adjusted for privacy, so totals can differ slightly between Census tables.
Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.
Fixed broadband coverage
Ofcom's predicted availability across all residential and commercial premises in this postcode in January 2026.
- Superfast, 30 Mbit/s+
- 100%
- Ultrafast, 100 Mbit/s+
- 100%
- Ultrafast, 300 Mbit/s+
- 100%
- Gigabit-capable
- 100%
- Unable to receive decent fixed or FWA broadband
- 0%
- Next Generation Access
- 100%
- Decent broadband available from fixed wireless
- 100%
Predicted coverage, not measured speeds. Check availability for your address with a provider. Postcode-level full-fibre figures are not published in this release.
Source: Ofcom Connected Nations Spring 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.
GP practices
9
within 5 km
SUNNYBANK HEALTH CENTRE
BRYN ROAD, CEFN FFOREST, BLACKWOOD, NP12 3NA
ODS code W93014
559 m
PENGAM HEALTH CENTRE
GLAN-YR-AFON LANE, FLEUR DE LIS, BLACKWOOD, NP12 3WA
ODS code W93614
1.2 km
BRYNTIRION SURGERY
WEST STREET, BARGOED, CF81 8SA
ODS code W95068
2.1 km
SOUTH STREET SURGERY
SOUTH STREET, BARGOED, CF81 8SU
ODS code W95078
2.3 km
BLACKWOOD MEDICAL GROUP
AVICENNA MEDICAL CENTRE, PONTLLANFRAITH BLACKWOOD, BLACKWOOD, NP12 2YU
ODS code W93011
2.6 km
PONTLLANFRAITH HEALTH CENTRE
RIVERSIDE MEDICAL PRACTIC, PONTLLANFRAITH HEALTH CENTRE, BLACKWOOD ROAD, PONTLLANFRAITH, BLACKWOOD, NP12 2YU
ODS code W93012
2.6 km
MEDDYGFA GELLIGAER SURGERY
HEOL HEN YSGOL, GELLIGAER, HENGOED, CF82 8FQ
ODS code W95050
2.8 km
MARKHAM MEDICAL CENTRE
JAMES STREET, MARKHAM, BLACKWOOD, NP12 0QN
ODS code W93010
3.2 km
OAKFIELD SURGERY
OAKFIELD STREET, YSTRAD MYNACH, HENGOED, CF82 7WX
ODS code W95065
3.8 km
Main GP practices only; branch surgeries are excluded. Distances are straight-line. Contact the practice to check registration, services, opening hours and appointments.
Source acquired on 2026-09-05. Contains information from NHS England, licenced under the current version of the Open Government Licence.
Nearby transport
- 0.1 miles
Cefn Fforest Primary School
BCT · Cefn Fforest
- 0.1 miles
Cefn Fforest Primary School
BCT · Cefn Fforest
- 0.2 miles
Addison Street Middle
BCT · Cefn Fforest
- 0.2 miles
St. Thomas's Church
BCT · Cefn Fforest
- 0.2 miles
Addison Street Top
BCT · Cefn Fforest
Evidence in context
Schools
34 open schools are in scope, including 0 primary and 0 secondary schools. Cefn Fforest Primary School is the nearest published school at 222 m.
Counts describe active establishment records. They do not assess admissions, catchments or quality.
Recorded crime
2,100 published events cover 12 months, averaging 175 events per published month. The largest recorded category is Violence and sexual offences with 826 events.
The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.