30, BRYN DERW, BLACKWOOD, NP12 1SN - £225,000

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.

30 BRYN DERW is a very small detached house of 71m², built sometime between 1991 and 1995, which could now be worth an estimated £224,773. It was last sold for £225,000 in March 2025, which was around 26% below the average March 2025 detached price in the Caerphilly local authority area. The most recent EPC inspection was December 2023, where the current energy rating was D, and the potential energy rating was B.

30 BRYN DERW Sold Prices

Land registry data shows two sales for 30 BRYN DERW 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 30 BRYN DERW sales were for below 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
2025 14 MAR	£225,000	£304,771	26% below HPI
1998 8 JAN	£60,000	£65,315	8% below HPI

30 BRYN DERW 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 30 BRYN DERW sales from January 1998 and March 2025 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 January 1998 sale was for 8% below the HPI. So the extrapolation line tracks at 8% below the HPI over time, until the March 2025 sale, where it falls to 26% below the HPI. The line then continues to track at 26% below the HPI.

What might 30 BRYN DERW be worth now?

30 BRYN DERW might now be worth an estimated £224,773.

This is based on house price deflation of 0.1%, between March 2025 and July 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 0.1% deflationary decrease is applied to the most recent sale price for 30 BRYN DERW of £225,000 on 14th March 2025. For the value to have decreased from £225,000 to £224,773 over the eight months to July 2025, the following assumptions must hold true:

• The value of 30 BRYN DERW has moved in line with the HPI for detached houses in the Caerphilly local authority area.
• The March 2025 sale price of £225,000 represented a fair market value for the property.
• The size, condition, and specification of 30 BRYN DERW has not materially changed since March 2025.

How Large is 30 BRYN DERW?

30 BRYN DERW is 71m² according to the EPC inspection conducted in December 2023. This puts it in the smallest 10% of detached houses houses in Blackwood, based on EPC data. The below chart shows the distribution of detached houses houses by size in Blackwood, and where 30 BRYN DERW lies on this distribution: 7% of detached houses houses are smaller than 30 BRYN DERW, and 93% of houses are larger. Note that EPC data is not available for all properties in Blackwood.

30 BRYN DERW: Plot and Title Map

30 BRYN DERW sits on a plot of roughly 0.060 of an acre, or 244m². The below map shows the location of 30 BRYN DERW, 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 30 BRYN DERW). 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 30 BRYN DERW?

30 BRYN DERW is located in BLACKWOOD, in the NP12 postcode district. The below map shows the position of No. 30 on BRYN DERW.