18, TINTERN CLOSE, HARPENDEN, AL5 3NZ - £690,000

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.

18 TINTERN CLOSE is a small detached house of 132m², built sometime between 1976 and 1982, which could now be worth an estimated £699,891. It was last sold for £690,000 in January 2024, which was around 41% below the average January 2024 detached price in the St Albans local authority area. The most recent EPC inspection was September 2020, where the current energy rating was D, and the potential energy rating was B.

18 TINTERN CLOSE Sold Prices

Land registry data shows two sales for 18 TINTERN 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 18 TINTERN CLOSE 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
2024 15 JAN	£690,000	£1,175,430	41% below HPI
1996 29 AUG	£142,500	£193,371	26% below HPI

18 TINTERN 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 18 TINTERN CLOSE sales from August 1996 and January 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 August 1996 sale was for 26% below the HPI. So the extrapolation line tracks at 26% below the HPI over time, until the January 2024 sale, where it falls to 41% below the HPI. The line then continues to track at 41% below the HPI.

What might 18 TINTERN CLOSE be worth now?

18 TINTERN CLOSE might now be worth an estimated £699,891.

This is based on house price inflation of 1.4%, between January 2024 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 1.4% inflationary increase is applied to the most recent sale price for 18 TINTERN CLOSE of £690,000 on 15th January 2024. For the value to have increased from £690,000 to £699,891 over the seven months to June 2025, the following assumptions must hold true:

• The value of 18 TINTERN CLOSE has moved in line with the HPI for detached houses in the St Albans local authority area.
• The January 2024 sale price of £690,000 represented a fair market value for the property.
• The size, condition, and specification of 18 TINTERN CLOSE has not materially changed since January 2024.

How Large is 18 TINTERN CLOSE?

18 TINTERN CLOSE is 132m² according to the EPC inspection conducted in September 2020. This puts it in the smallest 30% 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 18 TINTERN CLOSE lies on this distribution: 28% of detached houses houses are smaller than 18 TINTERN CLOSE, and 72% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

18 TINTERN CLOSE: Plot and Title Map

18 TINTERN CLOSE sits on a plot of roughly 0.118 of an acre, or 478m². The below map shows the location of 18 TINTERN 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 18 TINTERN 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 18 TINTERN CLOSE?

18 TINTERN CLOSE is located in HARPENDEN, in the AL5 postcode district. The below map shows the position of No. 18 on TINTERN CLOSE.