Over the past 31 years, there have been 23 property sales recorded in the NP12 3LN postcode area. The highest sale price reached £184,000, while the most recent sale was for a semi-detached house sold in October 2025 for £184,000.

The estimated average property value in NP12 3LN currently stands at £147,637, which is approximately 44.8% lower than the city average - making it a relatively affordable option for buyers.

In terms of size, the average price per square metre is approximately £1,741.

Property prices in NP12 3LN have risen by 8.1% over the past year , with a total increase of 42.2% over the past five years , and a long-term rise of 86.6% over the past decade .

The most common type of property sold in the area is semi-detached, making up around 65% of transactions , followed by terraced.

Housing in NP12 3LN is predominantly owner-occupied, with an estimated 100% of homes being lived in by the owners.

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Property Sales

17 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Semi-detached
🛏️ 4bed
📐 849 sq ft
Today
£156,892
streetscan.co.uk estimate
6 Dec 2011
£83,500
More details

19 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

Today
£185,528
streetscan.co.uk estimate
14 Mar 2008
£110,000
27 Nov 2003
£68,000

21 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Semi-detached
🛏️ 4bed
📐 797 sq ft
Today
£177,225
streetscan.co.uk estimate
18 Dec 1997
£34,750
More details

50 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Terraced
🛏️ 4bed
📐 818 sq ft
Today
£143,643
streetscan.co.uk estimate
30 May 2024
£131,000
2 Feb 2007
£96,000
More details

52 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Semi-detached
🛏️ 5bed
📐 840 sq ft
Today
£112,236
streetscan.co.uk estimate
22 Oct 2010
£59,000
More details

54 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Terraced
🛏️ 4bed
📐 893 sq ft
Today
£101,714
streetscan.co.uk estimate
15 Dec 2000
£22,000
More details

62 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Terraced
🛏️ 5bed
📐 773 sq ft
Today
£173,616
streetscan.co.uk estimate
19 Mar 2021
£132,000
17 Jan 2017
£91,500
View +3 more
More details

64 Derwendeg Avenue, Cefn Fforest, Blackwood, Islwyn, Gwent, NP12 3LN

Today
£156,662
streetscan.co.uk estimate
5 May 1995
£27,500

66 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Semi-detached
🛏️ 5bed
📐 990 sq ft
Today
£194,826
streetscan.co.uk estimate
9 Sep 2022
£179,000
30 Apr 2021
£150,000
View +2 more
More details

68 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

Today
£171,360
streetscan.co.uk estimate
29 Nov 2002
£48,000

72 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Semi-detached
🛏️ 5bed
📐 840 sq ft
Today
£127,181
streetscan.co.uk estimate
28 Jan 2019
£85,500
More details

76 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Semi-detached
🛏️ 5bed
📐 883 sq ft
Today
£187,323
streetscan.co.uk estimate
10 Oct 2025
£184,000
20 Dec 2023
£90,000
More details

78 Derwendeg Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3LN

🏠 Semi-detached
🛏️ 4bed
📐 872 sq ft
Today
£104,434
streetscan.co.uk estimate
20 Apr 2001
£23,500
More details

Area Insights

Data Sources

Properties at NP12 3LN appear twenty-three times in the Land Registry records, with the latest transaction recorded on 10 Oct 2025. It also has ten Energy Performance Certificates (EPC) entries, the earliest dating back to 19 Jan 2010. We use this data, to estimate the property's characteristics and current market value.

This website uses public sector information from:

These datasets are licensed under the Open Government Licence v3.0.
This website is not affiliated with or endorsed by HM Land Registry or DLUHC.

Disclaimer: StreetScan.co.uk makes all reasonable efforts to ensure the information provided on this website is current and accurate; however, no warranties or representations are made as to its completeness or accuracy. StreetScan.co.uk expressly disclaims any and all liability for any loss, damage, or expense arising directly or indirectly from the use of, or reliance upon, such information.