Over the past 30 years, there have been 34 property sales recorded in the NP12 1NW postcode area. The highest sale price reached £188,000, while the most recent sale was for a terraced house sold in September 2025 for £165,000.

The estimated average property value in NP12 1NW currently stands at £163,650, which is approximately 38.6% 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 £1,672.

Property prices in NP12 1NW have risen by 8.4% over the past year , with a total increase of 43.2% over the past five years, and a long-term rise of 77.3% over the past decade.

100% of recorded transactions in the area were for terraced properties.

Housing in NP12 1NW is predominantly owner-occupied, with an estimated 78% of homes being lived in by the owners.

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Property Sales

22 William Street, Blackwood, Caerphilly, NP12 1NW

Today
£170,690
streetscan.co.uk estimate
21 Oct 2005
£93,500
15 Nov 2000
£23,000

24 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1023 sq ft
Today
£199,986
streetscan.co.uk estimate
1 Jul 2003
£63,950
27 Mar 1997
£36,000
More details

26 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1066 sq ft
Today
£191,216
streetscan.co.uk estimate
6 Dec 1996
£36,000
More details

28 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1173 sq ft
Today
£186,092
streetscan.co.uk estimate
11 Apr 2019
£125,000
2 Sep 1996
£36,500
View +1 more
More details

30 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 4bed
📐 990 sq ft
Today
£190,075
streetscan.co.uk estimate
19 Oct 2000
£41,000
10 Sep 1998
£40,000
More details

31 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1033 sq ft
Today
£175,332
streetscan.co.uk estimate
28 Jan 1999
£35,000
More details

34 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 4bed
📐 969 sq ft
Today
£148,574
streetscan.co.uk estimate
13 Oct 2023
£140,000
19 Feb 1999
£35,000
More details

36 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 4bed
📐 1023 sq ft
Today
£152,963
streetscan.co.uk estimate
4 Nov 2011
£83,500
More details

37 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 6bed
📐 1023 sq ft
Today
£124,551
streetscan.co.uk estimate
24 Nov 2016
£74,000
More details

38 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1066 sq ft
Today
£142,070
streetscan.co.uk estimate
15 Nov 2013
£75,000
More details

40 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 6bed
📐 1033 sq ft
Today
£165,000
streetscan.co.uk estimate
26 Sep 2025
£165,000
13 Oct 1995
£27,300
More details

41 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1109 sq ft
Today
£126,777
streetscan.co.uk estimate
8 Sep 2017
£80,000
More details

43 William Street, Blackwood, Islwyn, Gwent, NP12 1NW

Today
£217,114
streetscan.co.uk estimate
28 Apr 1995
£38,000

44 William Street, Blackwood, Caerphilly, NP12 1NW

Today
£182,241
streetscan.co.uk estimate
15 Dec 2017
£115,000
30 Sep 2011
£109,995
29 Aug 2008
£115,000
5 Oct 2007
£95,000
28 Jan 2005
£85,000

45 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 4bed
📐 990 sq ft
Today
£146,503
streetscan.co.uk estimate
19 Nov 2021
£121,000
5 Sep 1997
£36,000
More details

46 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1109 sq ft
Today
£192,928
streetscan.co.uk estimate
16 Jun 2025
£188,000
19 Jun 2020
£135,000
View +1 more
More details

47 William Street, Blackwood, Caerphilly, NP12 1NW

Today
£148,791
streetscan.co.uk estimate
4 May 2007
£89,950

49 William Street, Blackwood, Caerphilly, NP12 1NW

Today
£127,108
streetscan.co.uk estimate
24 Jun 2011
£66,500

51 William Street, Blackwood, Caerphilly, NP12 1NW

Today
£138,623
streetscan.co.uk estimate
14 Dec 2001
£32,000

55 William Street, Blackwood, Caerphilly, NP12 1NW

🏠 Terraced
🛏️ 5bed
📐 1141 sq ft
Today
£148,740
streetscan.co.uk estimate
30 Apr 2003
£47,000
More details

Area Insights

Data Sources

Properties at NP12 1NW appear thirty-four times in the Land Registry records, with the latest transaction recorded on 26 Sep 2025. It also has fourteen Energy Performance Certificates (EPC) entries, the earliest dating back to 1 May 2014. 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.