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.
20 PARK MOUNT is a very small semi-detached house of 118m², built sometime between 1900 and 1929, which could now be worth an estimated £950,397. It was last sold for £938,080 in November 2024, which was around 25% above the average November 2024 semi-detached price in the St Albans local authority area. The most recent EPC inspection was February 2024, where the current energy rating was E, and the potential energy rating was C.
Land registry data shows four sales for 20 PARK MOUNT since 1st January 1995. The below table shows the price paid for the four sales, along with the average semi-detached price in the St Albans local authority area for the corresponding sale date. All of the four 20 PARK MOUNT 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 |
|---|---|---|---|
2024 1 NOV | £938,080 | £748,081 | 25% above HPI |
2020 8 DEC | £807,500 | £650,542 | 24% above HPI |
2006 3 MAY | £439,950 | £335,993 | 31% above HPI |
1996 7 JUN | £125,000 | £109,458 | 14% above HPI |
The below graph shows the average semi-detached house price in the St Albans local authority area over time, sourced from the HPI. The four 20 PARK MOUNT sales between June 1996 and November 2024 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 December 2020 sale was for 24% above the HPI. So the extrapolation line tracks at 24% above the HPI over time, until the November 2024 sale, where it rises to 25% above the HPI. The line then continues to track at 25% above the HPI.

20 PARK MOUNT might now be worth an estimated £950,397.
This is based on house price inflation of 1.3%, between November 2024 and May 2026, 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 1.3% inflationary increase is applied to the most recent sale price for 20 PARK MOUNT of £938,080 on 1st November 2024. For the value to have increased from £938,080 to £950,397 over the two years and six months to May 2026, the following assumptions must hold true:
20 PARK MOUNT is 118m² according to the EPC inspection conducted in February 2024. This puts it in the smallest 20% 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 20 PARK MOUNT lies on this distribution: 17% of semi-detached houses houses are smaller than 20 PARK MOUNT, and 83% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

20 PARK MOUNT sits on a plot of roughly 0.047 of an acre, or 192m². The below map shows the location of 20 PARK MOUNT, 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 20 PARK MOUNT). 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.

20 PARK MOUNT is located in HARPENDEN, in the AL5 postcode district. The below map shows the position of No. 20 on PARK MOUNT.

Most recent sales first: