55, WILLIAM STREET, TRETHOMAS, CAERPHILLY, CF83 8FX - £205,000

Based on the December 2024 Price Paid Data (released on 29th January 2025), the November 2024 House Price Index (released on 15th January 2025), and the December 2024 Energy Performance of Buildings Data (released on 31st January 2025). Sources

55 WILLIAM STREET is a very small detached house of 81m², built sometime between 1991 and 1995. It was last sold for £205,000 in June 2021, which was around 20% below the average June 2021 detached price in the Caerphilly local authority area. The most recent EPC inspection was October 2015, where the current energy rating was D, and the potential energy rating was B.

55 WILLIAM STREET Sold Prices

Land registry data shows three sales for 55 WILLIAM STREET since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Caerphilly local authority area for the corresponding sale date. Two of the three 55 WILLIAM STREET sales were for below the average price, whilst one was for above the average price. The average price is sourced from the Office for National Statistics' House Price Index (HPI).

Date	Price	HPI Price	Variation from HPI
2021 17 JUN	£205,000	£256,646	20% below HPI
2016 29 SEP	£175,500	£195,246	10% below HPI
2001 1 JUN	£85,000	£81,183	5% above HPI

55 WILLIAM STREET Price Paid vs. HPI Average

The below graph shows the average detached house price in the Caerphilly local authority area over time, sourced from the HPI. The three 55 WILLIAM STREET sales between June 2001 and June 2021 have been plotted on the graph. A line has been extrapolated to show what the value of the property might have been over time, following each sale, had it maintained the same margin above or below the HPI (as a percentage). For example, the September 2016 sale was for 10% below the HPI. So the extrapolation line tracks at 10% below the HPI over time, until the June 2021 sale, where it falls to 20% below the HPI. The line then continues to track at 20% below the HPI.

How Large is 55 WILLIAM STREET?

55 WILLIAM STREET is 81m² according to the EPC inspection conducted in October 2015. This puts it in the smallest 10% of detached houses in Trethomas, based on EPC data. The below chart shows the distribution of detached houses by size in Trethomas, and where 55 WILLIAM STREET lies on this distribution: 7% of detached houses are smaller than 55 WILLIAM STREET, and 93% of houses are larger. Note that EPC data is not available for all properties in Trethomas.

55 WILLIAM STREET: Plot and Title Map

55 WILLIAM STREET sits on a plot of roughly 0.086 of an acre, or 347m². The below map shows the location of 55 WILLIAM STREET, an approximate outline of the building(s), and the indicative extent of the property. The plot extent is a Land Registry INSPIRE Index Polygon, and it is important to note that a title may include more than one polygon, whereas only one polygon is shown on the map (the polygon which intersects with the position of 55 WILLIAM STREET). The full extent of the land contained in any registered title can only be identified from the individual title plan. The maps on this page should not be relied upon to establish the extent of a title.

Where is 55 WILLIAM STREET?

55 WILLIAM STREET is located in TRETHOMAS, in the CF83 postcode district. The below map shows the position of No. 55 on WILLIAM STREET.