20, HARTWELL GARDENS, HARPENDEN, AL5 2RW - £1,080,000

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

20 HARTWELL GARDENS is a midsized extended detached house of 153m², built sometime between 1976 and 1982, which could now be worth an estimated £1,300,953. It was last sold for £1,080,000 in December 2019, which was around 5% above the average December 2019 detached price in the St Albans local authority area. The most recent EPC inspection was June 2019, where the current energy rating was D, and the potential energy rating was C.

20 HARTWELL GARDENS Sold Prices

Land registry data shows three sales for 20 HARTWELL GARDENS since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the St Albans local authority area for the corresponding sale date. All of the three 20 HARTWELL GARDENS 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
2019 5 DEC	£1,080,000	£1,033,160	5% above HPI
2006 19 DEC	£680,000	£599,323	13% above HPI
1996 28 JUN	£262,500	£187,863	40% above HPI

20 HARTWELL GARDENS Price Paid vs. HPI Average

The below graph shows the average detached house price in the St Albans local authority area over time, sourced from the HPI. The three 20 HARTWELL GARDENS sales between June 1996 and December 2019 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 2006 sale was for 13% above the HPI. So the extrapolation line tracks at 13% above the HPI over time, until the December 2019 sale, where it falls to 5% above the HPI. The line then continues to track at 5% above the HPI.

What might 20 HARTWELL GARDENS be worth now?

20 HARTWELL GARDENS might now be worth an estimated £1,300,953.

This is based on house price inflation of 20.5%, between December 2019 and December 2024, for 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 20.5% inflationary increase is applied to the most recent sale price for 20 HARTWELL GARDENS of £1,080,000 on 5th December 2019. For the value to have increased from £1,080,000 to £1,300,953 over the five years to December 2024, the following assumptions must hold true:

• The value of 20 HARTWELL GARDENS has moved in line with the HPI for detached houses in the St Albans local authority area.
• The December 2019 sale price of £1,080,000 represented a fair market value for the property.
• The size, condition, and specification of 20 HARTWELL GARDENS has not materially changed since December 2019.

How Large is 20 HARTWELL GARDENS?

20 HARTWELL GARDENS is 153m², which includes two extensions, according to the EPC inspection conducted in June 2019. This puts it in the smallest 50% of detached houses houses in Harpenden, based on EPC data. The below chart shows the distribution of detached houses houses by size in Harpenden, and where 20 HARTWELL GARDENS lies on this distribution: 43% of detached houses houses are smaller than 20 HARTWELL GARDENS, and 57% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

20 HARTWELL GARDENS: Plot and Title Map

20 HARTWELL GARDENS sits on a plot of roughly 0.123 of an acre, or 499m². The below map shows the location of 20 HARTWELL GARDENS, 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 HARTWELL GARDENS). 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 20 HARTWELL GARDENS?

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