18, TREM Y CASTELL, CAERPHILLY, CF83 1TH - £207,000

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.

18 TREM Y CASTELL is a midsized extended detached house of 103m², built sometime between 1996 and 2002, which could now be worth an estimated £339,671. It was last sold for £207,000 in October 2007, which was around 11% above the average October 2007 detached price in the Caerphilly local authority area. The most recent EPC inspection was April 2024, where the current energy rating was B, and the potential energy rating was B.

18 TREM Y CASTELL Sold Prices

Land registry data shows three sales for 18 TREM Y CASTELL 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. All of the three 18 TREM Y CASTELL sales were 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
2007 23 OCT	£207,000	£186,935	11% above HPI
2002 12 APR	£115,000	£87,507	31% above HPI
1996 29 NOV	£81,495	£66,767	22% above HPI

18 TREM Y CASTELL 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 18 TREM Y CASTELL sales between November 1996 and October 2007 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 April 2002 sale was for 31% above the HPI. So the extrapolation line tracks at 31% above the HPI over time, until the October 2007 sale, where it falls to 11% above the HPI. The line then continues to track at 11% above the HPI.

What might 18 TREM Y CASTELL be worth now?

18 TREM Y CASTELL might now be worth an estimated £339,671.

This is based on house price inflation of 64.1%, between October 2007 and March 2025, 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 64.1% inflationary increase is applied to the most recent sale price for 18 TREM Y CASTELL of £207,000 on 23rd October 2007. For the value to have increased from £207,000 to £339,671 over the eighteen years and seven months to March 2025, the following assumptions must hold true:

• The value of 18 TREM Y CASTELL has moved in line with the HPI for detached houses in the Caerphilly local authority area.
• The October 2007 sale price of £207,000 represented a fair market value for the property.
• The size, condition, and specification of 18 TREM Y CASTELL has not materially changed since October 2007.

How Large is 18 TREM Y CASTELL?

18 TREM Y CASTELL is 103m², which includes one extension, according to the EPC inspection conducted in April 2024. This puts it in the smallest 50% of detached houses houses in Caerphilly, based on EPC data. The below chart shows the distribution of detached houses houses by size in Caerphilly, and where 18 TREM Y CASTELL lies on this distribution: 44% of detached houses houses are smaller than 18 TREM Y CASTELL, and 55% of houses are larger. Note that EPC data is not available for all properties in Caerphilly.

18 TREM Y CASTELL: Plot and Title Map

18 TREM Y CASTELL sits on a plot of roughly 0.049 of an acre, or 198m². The below map shows the location of 18 TREM Y CASTELL, 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 18 TREM Y CASTELL). 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 18 TREM Y CASTELL?

18 TREM Y CASTELL is located in CAERPHILLY, in the CF83 postcode district. The below map shows the position of No. 18 on TREM Y CASTELL.