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21, HEOL SERTH, CAERPHILLY, CF83 2AN - £240,000

The information on this page is based on a number of underlying datasets, most of which are updated monthly. We maintain an update schedule which explains which version of each dataset we are currently relying on.

21 HEOL SERTH is a very large detached house of 142m², built sometime between 1976 and 1982, which could now be worth an estimated £447,994. It was last sold for £240,000 in September 2010, which was around 41% above the average September 2010 detached price in the Caerphilly local authority area. The most recent EPC inspection was April 2010, where the current energy rating was E, and the potential energy rating was C.

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21 HEOL SERTH Sold Prices

Land registry data shows one sale for 21 HEOL SERTH since 1st January 1995. The below table shows the price paid for the one sale, along with the average detached price in the Caerphilly local authority area for the corresponding sale date. The average price is sourced from the Office for National Statistics' House Price Index (HPI).

DatePriceHPI PriceVariation from HPI
2010
7 SEP
£240,000£170,811
up arrow
41% above HPI

What might 21 HEOL SERTH be worth now?

21 HEOL SERTH might now be worth an estimated £447,994.

This is based on house price inflation of 86.7%, between September 2010 and April 2026, for detached houses, in the Caerphilly local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 86.7% inflationary increase is applied to the most recent sale price for 21 HEOL SERTH of £240,000 on 7th September 2010. For the value to have increased from £240,000 to £447,994 over the sixteen years and five months to April 2026, the following assumptions must hold true:

  • The value of 21 HEOL SERTH has moved in line with the HPI for detached houses in the Caerphilly local authority area.
  • The September 2010 sale price of £240,000 represented a fair market value for the property.
  • The size, condition, and specification of 21 HEOL SERTH has not materially changed since September 2010.
Disclaimer: Please note that this is a theoretical estimate based on assumptions which may or may not be correct. It should not be relied on for any purpose.

How Large is 21 HEOL SERTH?

21 HEOL SERTH is 142m² according to the EPC inspection conducted in April 2010. This puts it in the largest 20% of detached houses in Caerphilly, based on EPC data. The below chart shows the distribution of detached houses by size in Caerphilly, and where 21 HEOL SERTH lies on this distribution: 86% of detached houses are smaller than 21 HEOL SERTH, and 14% of detached houses are larger. Note that EPC data is not available for all properties in Caerphilly.

21, HEOL SERTH, CAERPHILLY, CF83 2AN: Size of property relative to detached houses in Caerphilly

21 HEOL SERTH: Plot

21 HEOL SERTH sits on a plot of roughly 0.234 of an acre, or 947m².

Where is 21 HEOL SERTH?

21 HEOL SERTH is located in CAERPHILLY, in the CF83 postcode district.

All property sales on HEOL SERTH

Most recent sales first:

Limited data available
2026
12 FEB
£295,000
Limited data available
2025
15 SEP
£380,000
Full data available
2021
24 SEP
£336,000
Limited data available
2019
7 JUN
£241,635
Limited data available
2018
23 MAY
£165,000
Limited data available
2018
11 MAY
£255,000
Limited data available
2017
14 JUL
£280,000
Full data available
2017
7 JUL
£205,000
Full data available
2017
18 MAY
£124,500
Full data available
2016
8 FEB
£153,000
Full data available
2015
6 NOV
£255,000
Limited data available
2014
7 NOV
£200,000
Limited data available
2010
7 SEP
£240,000
Full data available
2006
12 APR
£168,750
Limited data available
2005
21 DEC
£220,000
Limited data available
2005
10 OCT
£164,950
Full data available
2003
24 OCT
£60,000
Limited data available
2002
31 MAY
£92,000
Limited data available
2000
28 SEP
£104,000
Limited data available
1999
1 OCT
£132,000
Limited data available
1996
29 NOV
£62,000
Limited data available
1995
28 JUL
£55,000
Full data available
1995
21 JUL
£58,500
Source: HM Land Registry Price Paid Data
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Source: HM Land Registry UK House Price Index
Licence: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Source: Energy Performance of Buildings Data: England and Wales
Licence: Ordnance Survey and Royal Mail Copyright and Database Right Notice.
Licence: Open Government Licence v3.0.
Source: INSPIRE Polygons
Copyright statement: This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use.
Licence: Open Government Licence v3.0.