Over the past 30 years, there have been 32 property sales recorded in the NP12 3JS postcode area. The highest sale price reached £165,000, while the most recent sale was for a terraced house sold in March 2026 for £140,000.

The estimated average property value in NP12 3JS currently stands at £160,206, which is approximately 35.3% 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 £1,929.

Property prices in NP12 3JS have risen by 8.2% over the past year , with a total increase of 42.4% over the past five years , and a long-term rise of 84% over the past decade .

The most common type of property sold in the area is semi-detached, making up around 56% of transactions , followed by terraced.

Housing in NP12 3JS is predominantly owner-occupied, with an estimated 84% of homes being lived in by the owners.

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Property Sales

1 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Semi-detached
🛏️ 5bed
📐 872 sq ft
Today
£198,665
streetscan.co.uk estimate
12 Apr 2019
£133,000
29 Mar 2018
£120,500
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12 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Semi-detached
🛏️ 6bed
📐 1119 sq ft
Today
£113,652
streetscan.co.uk estimate
30 Apr 2021
£85,000
More details

13 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Terraced
🛏️ 4bed
📐 1098 sq ft
Today
£140,573
streetscan.co.uk estimate
31 May 2006
£79,500
16 Oct 2005
£79,500
More details

15 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Terraced
🛏️ 4bed
📐 757 sq ft
Today
£139,822
streetscan.co.uk estimate
7 Dec 2018
£94,000
23 Aug 2002
£34,000
More details

17 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

Today
£82,028
streetscan.co.uk estimate
23 Jun 2017
£50,000

20 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Semi-detached
🛏️ 4bed
📐 861 sq ft
Today
£159,098
streetscan.co.uk estimate
12 Aug 2005
£82,000
More details

23 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Terraced
🛏️ 5bed
📐 840 sq ft
Today
£140,000
streetscan.co.uk estimate
20 Mar 2026
£140,000
11 Sep 2023
£133,005
More details

24 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Semi-detached
🛏️ 4bed
📐 947 sq ft
Today
£230,819
streetscan.co.uk estimate
9 May 2003
£75,000
21 Jun 2002
£49,495
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30 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Semi-detached
🛏️ 5bed
📐 904 sq ft
Today
£154,769
streetscan.co.uk estimate
4 Nov 2024
£150,000
More details

32 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

Today
£121,705
streetscan.co.uk estimate
6 Jan 1999
£25,000

33 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Terraced
🛏️ 5bed
📐 947 sq ft
Today
£133,244
streetscan.co.uk estimate
13 Nov 2024
£130,000
More details

39 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Terraced
🛏️ 4bed
📐 883 sq ft
Today
£175,169
streetscan.co.uk estimate
8 Dec 2022
£165,000
More details

4 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Semi-detached
🛏️ 3bed
📐 797 sq ft
Today
£157,198
streetscan.co.uk estimate
21 Jun 2019
£107,000
6 Jun 2011
£82,000
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43 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

Today
£167,384
streetscan.co.uk estimate
20 Apr 2000
£34,950

5 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

Today
£186,444
streetscan.co.uk estimate
28 Mar 1996
£33,250

53 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

Today
£140,250
streetscan.co.uk estimate
20 Nov 2017
£88,000
24 Jan 2007
£89,500

6 Penybryn Avenue, Cefn Fforest, Blackwood, Islwyn, Gwent, NP12 3JS

Today
£238,000
streetscan.co.uk estimate
15 Feb 1996
£42,000

69 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Terraced
🛏️ 4bed
📐 1076 sq ft
Today
£187,047
streetscan.co.uk estimate
10 Jul 2019
£127,500
17 Apr 2015
£97,990
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More details

9 Penybryn Avenue, Cefn Fforest, Blackwood, Caerphilly, NP12 3JS

🏠 Semi-detached
🛏️ 4bed
📐 893 sq ft
Today
£201,152
streetscan.co.uk estimate
19 Jun 2015
£111,000
More details

Area Insights

Data Sources

Properties at NP12 3JS appear thirty-two times in the Land Registry records, with the latest transaction recorded on 20 Mar 2026. It also has thirteen Energy Performance Certificates (EPC) entries, the earliest dating back to 16 May 2016. 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.