15, SEVENACRES, TEWIN, WELWYN, AL6 0FD - £905,000

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.

15 SEVENACRES is a large extended detached house of 217m², built sometime from 2012 onwards, which could now be worth an estimated £1,011,119. It was last sold for £905,000 in July 2017, which was around 18% above the average July 2017 detached price in the East Hertfordshire local authority area. The most recent EPC inspection was February 2025, where the current energy rating was B, and the potential energy rating was B.

15 SEVENACRES Sold Prices

Land registry data shows two sales for 15 SEVENACRES since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the East Hertfordshire local authority area for the corresponding sale date. Both of the two 15 SEVENACRES 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
2017 11 JUL	£905,000	£764,476	18% above HPI
2014 24 JUN	£884,000	£568,427	56% above HPI

15 SEVENACRES Price Paid vs. HPI Average

The below graph shows the average detached house price in the East Hertfordshire local authority area over time, sourced from the HPI. The two 15 SEVENACRES sales from June 2014 and July 2017 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 June 2014 sale was for 56% above the HPI. So the extrapolation line tracks at 56% above the HPI over time, until the July 2017 sale, where it falls to 18% above the HPI. The line then continues to track at 18% above the HPI.

What might 15 SEVENACRES be worth now?

15 SEVENACRES might now be worth an estimated £1,011,119.

This is based on house price inflation of 11.7%, between July 2017 and February 2025, for detached houses, in the East Hertfordshire local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 11.7% inflationary increase is applied to the most recent sale price for 15 SEVENACRES of £905,000 on 11th July 2017. For the value to have increased from £905,000 to £1,011,119 over the eight years and five months to February 2025, the following assumptions must hold true:

• The value of 15 SEVENACRES has moved in line with the HPI for detached houses in the East Hertfordshire local authority area.
• The July 2017 sale price of £905,000 represented a fair market value for the property.
• The size, condition, and specification of 15 SEVENACRES has not materially changed since July 2017.

How Large is 15 SEVENACRES?

15 SEVENACRES is 217m², which includes one extension, according to the EPC inspection conducted in February 2025. This puts it in the largest 30% of detached houses houses in Tewin, based on EPC data. The below chart shows the distribution of detached houses houses by size in Tewin, and where 15 SEVENACRES lies on this distribution: 79% of detached houses houses are smaller than 15 SEVENACRES, and 21% of houses are larger. Note that EPC data is not available for all properties in Tewin.

15 SEVENACRES: Plot and Title Map

15 SEVENACRES sits on a plot of roughly 0.077 of an acre, or 312m². The below map shows the location of 15 SEVENACRES, 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 15 SEVENACRES). 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 15 SEVENACRES?

15 SEVENACRES is located in TEWIN, in the AL6 postcode district. The below map shows the position of No. 15 on SEVENACRES.