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.
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).
| Date | Price | HPI Price | Variation from HPI |
|---|---|---|---|
2010 7 SEP | £240,000 | £170,811 | 41% above HPI |
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:
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 sits on a plot of roughly 0.234 of an acre, or 947m².
21 HEOL SERTH is located in CAERPHILLY, in the CF83 postcode district.
Most recent sales first: