20, GREENWAY, HARPENDEN, AL5 1NQ - £788,000

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 GREENWAY is a very small extended detached house of 104m², built sometime between 1950 and 1966, which could now be worth an estimated £930,173. It was last sold for £788,000 in August 2020, which was around 25% below the average August 2020 detached price in the St Albans local authority area. The most recent EPC inspection was February 2020, where the current energy rating was C, and the potential energy rating was B.

20 GREENWAY Sold Prices

Land registry data shows three sales for 20 GREENWAY 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 GREENWAY 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
2020 26 AUG	£788,000	£1,048,480	25% below HPI
2018 20 SEP	£700,000	£1,056,080	34% below HPI
2010 19 MAR	£460,200	£643,989	29% below HPI

20 GREENWAY 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 GREENWAY sales between March 2010 and August 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 2018 sale was for 34% below the HPI. So the extrapolation line tracks at 34% below the HPI over time, until the August 2020 sale, where it rises to 25% below the HPI. The line then continues to track at 25% below the HPI.

What might 20 GREENWAY be worth now?

20 GREENWAY might now be worth an estimated £930,173.

This is based on house price inflation of 18%, between August 2020 and February 2025, 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 18% inflationary increase is applied to the most recent sale price for 20 GREENWAY of £788,000 on 26th August 2020. For the value to have increased from £788,000 to £930,173 over the five years and six months to February 2025, the following assumptions must hold true:

• The value of 20 GREENWAY has moved in line with the HPI for detached houses in the St Albans local authority area.
• The August 2020 sale price of £788,000 represented a fair market value for the property.
• The size, condition, and specification of 20 GREENWAY has not materially changed since August 2020.

How Large is 20 GREENWAY?

20 GREENWAY is 104m², which includes two extensions, according to the EPC inspection conducted in February 2020. This puts it in the smallest 10% 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 GREENWAY lies on this distribution: 10% of detached houses houses are smaller than 20 GREENWAY, and 90% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

20 GREENWAY: Plot and Title Map

20 GREENWAY sits on a plot of roughly 0.106 of an acre, or 429m². The below map shows the location of 20 GREENWAY, 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 GREENWAY). 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 GREENWAY?

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