17, ROUNDWOOD PARK, HARPENDEN, AL5 3AB - £1,387,500

Based on the January 2025 Price Paid Data (released on 3rd March 2025), the December 2024 House Price Index (released on 19th February 2025), and the January 2025 Energy Performance of Buildings Data (released on 27th February 2025). Sources

17 ROUNDWOOD PARK is a large extended semi-detached house of 193m², built sometime between 1900 and 1929, which could now be worth an estimated £1,702,308. It was last sold for £1,387,500 in July 2020, which was around 122% above the average July 2020 semi-detached price in the St Albans local authority area. The most recent EPC inspection was March 2012, where the current energy rating was D, and the potential energy rating was C.

17 ROUNDWOOD PARK Sold Prices

Land registry data shows three sales for 17 ROUNDWOOD PARK since 1^st January 1995. The below table shows the price paid for the three sales, along with the average semi-detached price in the St Albans local authority area for the corresponding sale date. All of the three 17 ROUNDWOOD PARK 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
2020 15 JUL	£1,387,500	£623,856	122% above HPI
2013 13 SEP	£1,145,000	£448,405	155% above HPI
2006 17 JAN	£615,000	£327,915	88% above HPI

17 ROUNDWOOD PARK Price Paid vs. HPI Average

The below graph shows the average semi-detached house price in the St Albans local authority area over time, sourced from the HPI. The three 17 ROUNDWOOD PARK sales between January 2006 and July 2020 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 2013 sale was for 155% above the HPI. So the extrapolation line tracks at 155% above the HPI over time, until the July 2020 sale, where it falls to 122% above the HPI. The line then continues to track at 122% above the HPI.

What might 17 ROUNDWOOD PARK be worth now?

17 ROUNDWOOD PARK might now be worth an estimated £1,702,308.

This is based on house price inflation of 22.7%, between July 2020 and December 2024, for semi-detached houses, in the St Albans local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 22.7% inflationary increase is applied to the most recent sale price for 17 ROUNDWOOD PARK of £1,387,500 on 15th July 2020. For the value to have increased from £1,387,500 to £1,702,308 over the three years and seven months to December 2024, the following assumptions must hold true:

• The value of 17 ROUNDWOOD PARK has moved in line with the HPI for semi-detached houses in the St Albans local authority area.
• The July 2020 sale price of £1,387,500 represented a fair market value for the property.
• The size, condition, and specification of 17 ROUNDWOOD PARK has not materially changed since July 2020.

How Large is 17 ROUNDWOOD PARK?

17 ROUNDWOOD PARK is 193m², which includes two extensions, according to the EPC inspection conducted in March 2012. This puts it in the largest 40% of semi-detached houses houses in Harpenden, based on EPC data. The below chart shows the distribution of semi-detached houses houses by size in Harpenden, and where 17 ROUNDWOOD PARK lies on this distribution: 64% of semi-detached houses houses are smaller than 17 ROUNDWOOD PARK, and 36% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

17 ROUNDWOOD PARK: Plot and Title Map

17 ROUNDWOOD PARK sits on a plot of roughly 0.176 of an acre, or 711m². The below map shows the location of 17 ROUNDWOOD PARK, 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 17 ROUNDWOOD PARK). 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 17 ROUNDWOOD PARK?

17 ROUNDWOOD PARK is located in HARPENDEN, in the AL5 postcode district. The below map shows the position of No. 17 on ROUNDWOOD PARK.