20B, THE CLOSE, HARPENDEN, AL5 3NE - £830,000

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.

20B THE CLOSE is a midsized extended detached house of 168m², built sometime between 1950 and 1966, which could now be worth an estimated £1,597,070. It was last sold for £830,000 in April 2007, which was around 34% above the average April 2007 detached price in the St Albans local authority area. The most recent EPC inspection was January 2025, where the current energy rating was D, and the potential energy rating was C.

20B THE CLOSE Sold Prices

Land registry data shows two sales for 20B THE CLOSE since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the St Albans local authority area for the corresponding sale date. Both of the two 20B THE CLOSE 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
2007 12 APR	£830,000	£619,630	34% above HPI
1997 8 AUG	£275,000	£234,564	17% above HPI

20B THE CLOSE 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 two 20B THE CLOSE sales from August 1997 and April 2007 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 August 1997 sale was for 17% above the HPI. So the extrapolation line tracks at 17% above the HPI over time, until the April 2007 sale, where it rises to 34% above the HPI. The line then continues to track at 34% above the HPI.

What might 20B THE CLOSE be worth now?

20B THE CLOSE might now be worth an estimated £1,597,070.

This is based on house price inflation of 92.4%, between April 2007 and June 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 92.4% inflationary increase is applied to the most recent sale price for 20B THE CLOSE of £830,000 on 12th April 2007. For the value to have increased from £830,000 to £1,597,070 over the seventeen years and ten months to June 2025, the following assumptions must hold true:

• The value of 20B THE CLOSE has moved in line with the HPI for detached houses in the St Albans local authority area.
• The April 2007 sale price of £830,000 represented a fair market value for the property.
• The size, condition, and specification of 20B THE CLOSE has not materially changed since April 2007.

How Large is 20B THE CLOSE?

20B THE CLOSE is 168m², which includes two extensions, according to the EPC inspection conducted in January 2025. This puts it in the largest 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 20B THE CLOSE lies on this distribution: 51% of detached houses houses are smaller than 20B THE CLOSE, and 48% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

20B THE CLOSE: Plot and Title Map

20B THE CLOSE sits on a plot of roughly 0.303 of an acre, or 1,225m². The below map shows the location of 20B THE CLOSE, 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 20B THE CLOSE). 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 20B THE CLOSE?

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