12, PLAS PENWERN, JOHNSTOWN, CARMARTHEN, SA31 3PN - £224,500

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.

12 PLAS PENWERN is a very small detached house of 82m², built sometime between 1991 and 1995. It was last sold for £224,500 in June 2025, which was around 20% below the average June 2025 detached price in the Carmarthenshire local authority area. The most recent EPC inspection was November 2024, where the current energy rating was D, and the potential energy rating was B.

12 PLAS PENWERN Sold Prices

Land registry data shows three sales for 12 PLAS PENWERN since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Carmarthenshire local authority area for the corresponding sale date. The three 12 PLAS PENWERN sales were a mix of below the average price, roughly equal to the average price, and 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
2025 16 JUN	£224,500	£279,948	20% below HPI
2013 19 APR	£165,000	£165,197	Close to HPI
2004 26 OCT	£168,000	£161,041	4% above HPI

12 PLAS PENWERN Price Paid vs. HPI Average

The below graph shows the average detached house price in the Carmarthenshire local authority area over time, sourced from the HPI. The three 12 PLAS PENWERN sales between October 2004 and June 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 April 2013 sale roughly matched the HPI. So the extrapolation line tracks roughly in line with the HPI over time, until the June 2025 sale, where it falls to 20% below the HPI. The line then continues to track at 20% below the HPI.

How Large is 12 PLAS PENWERN?

12 PLAS PENWERN is 82m² according to the EPC inspection conducted in November 2024. This puts it in the smallest 20% of detached houses houses in Carmarthen, based on EPC data. The below chart shows the distribution of detached houses houses by size in Carmarthen, and where 12 PLAS PENWERN lies on this distribution: 14% of detached houses houses are smaller than 12 PLAS PENWERN, and 85% of houses are larger. Note that EPC data is not available for all properties in Carmarthen.

12 PLAS PENWERN: Plot and Title Map

12 PLAS PENWERN sits on a plot of roughly 0.072 of an acre, or 291m². The below map shows the location of 12 PLAS PENWERN, 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 12 PLAS PENWERN). 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 12 PLAS PENWERN?

12 PLAS PENWERN is located in JOHNSTOWN, in the SA31 postcode district. The below map shows the position of No. 12 on PLAS PENWERN.