29, PENTWYN ISAF, CAERPHILLY, CF83 2NR - £430,000

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.

29 PENTWYN ISAF is a very large extended detached house of 153m², built sometime between 1967 and 1975, which could now be worth an estimated £438,847. It was last sold for £430,000 in February 2026, which was around 38% above the average February 2026 detached price in the Caerphilly local authority area. The most recent EPC inspection was June 2025, where the current energy rating was D, and the potential energy rating was C.

29 PENTWYN ISAF Sold Prices

Land registry data shows two sales for 29 PENTWYN ISAF since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Caerphilly local authority area for the corresponding sale date. Both of the two 29 PENTWYN ISAF 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
2026 6 FEB	£430,000	£312,415	38% above HPI
2003 24 OCT	£157,000	£120,596	30% above HPI

29 PENTWYN ISAF 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 two 29 PENTWYN ISAF sales from October 2003 and February 2026 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 October 2003 sale was for 30% above the HPI. So the extrapolation line tracks at 30% above the HPI over time, until the February 2026 sale, where it rises to 38% above the HPI. The line then continues to track at 38% above the HPI.

What might 29 PENTWYN ISAF be worth now?

29 PENTWYN ISAF might now be worth an estimated £438,847.

This is based on house price inflation of 2.1%, between February 2026 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 2.1% inflationary increase is applied to the most recent sale price for 29 PENTWYN ISAF of £430,000 on 6th February 2026. For the value to have increased from £430,000 to £438,847 over the ten months to April 2026, the following assumptions must hold true:

• The value of 29 PENTWYN ISAF has moved in line with the HPI for detached houses in the Caerphilly local authority area.
• The February 2026 sale price of £430,000 represented a fair market value for the property.
• The size, condition, and specification of 29 PENTWYN ISAF has not materially changed since February 2026.

How Large is 29 PENTWYN ISAF?

29 PENTWYN ISAF is 153m², which includes one extension, according to the EPC inspection conducted in June 2025. This puts it in the largest 10% 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 29 PENTWYN ISAF lies on this distribution: 90% of detached houses houses are smaller than 29 PENTWYN ISAF, and 10% of houses are larger. Note that EPC data is not available for all properties in Caerphilly.

29 PENTWYN ISAF: Plot and Title Map

29 PENTWYN ISAF sits on a plot of roughly 0.136 of an acre, or 549m². The below map shows the location of 29 PENTWYN ISAF, 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 29 PENTWYN ISAF). 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 29 PENTWYN ISAF?

29 PENTWYN ISAF is located in CAERPHILLY, in the CF83 postcode district. The below map shows the position of No. 29 on PENTWYN ISAF.