315, KNIGHTSFIELD, WELWYN GARDEN CITY, AL8 7NJ - £838,000

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

315 KNIGHTSFIELD is a very large extended detached house of 208m², built sometime between 1950 and 1966, which could now be worth an estimated £902,349. It was last sold for £838,000 in January 2020, which was about the average January 2020 detached price in the Welwyn Hatfield local authority area. The most recent EPC inspection was September 2016, where the current energy rating was D, and the potential energy rating was C.

315 KNIGHTSFIELD Sold Prices

Land registry data shows two sales for 315 KNIGHTSFIELD since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Welwyn Hatfield local authority area for the corresponding sale date. One of the two 315 KNIGHTSFIELD sales was roughly equal to the average price, whilst the other was 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
2020 29 JAN	£838,000	£839,842	Close to HPI
2009 6 NOV	£540,000	£508,241	6% above HPI

315 KNIGHTSFIELD Price Paid vs. HPI Average

The below graph shows the average detached house price in the Welwyn Hatfield local authority area over time, sourced from the HPI. The two 315 KNIGHTSFIELD sales from November 2009 and January 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 November 2009 sale was for 6% above the HPI. So the extrapolation line tracks at 6% above the HPI over time, until the January 2020 sale, where it falls to roughly the same level as the HPI. The line then continues to track in line with the HPI.

What might 315 KNIGHTSFIELD be worth now?

315 KNIGHTSFIELD might now be worth an estimated £902,349.

This is based on house price inflation of 7.7%, between January 2020 and December 2024, for detached houses, in the Welwyn Hatfield local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 7.7% inflationary increase is applied to the most recent sale price for 315 KNIGHTSFIELD of £838,000 on 29th January 2020. For the value to have increased from £838,000 to £902,349 over the three years and one month to December 2024, the following assumptions must hold true:

• The value of 315 KNIGHTSFIELD has moved in line with the HPI for detached houses in the Welwyn Hatfield local authority area.
• The January 2020 sale price of £838,000 represented a fair market value for the property.
• The size, condition, and specification of 315 KNIGHTSFIELD has not materially changed since January 2020.

How Large is 315 KNIGHTSFIELD?

315 KNIGHTSFIELD is 208m², which includes two extensions, according to the EPC inspection conducted in September 2016. This puts it in the largest 10% of detached houses houses in Welwyn Garden City, based on EPC data. The below chart shows the distribution of detached houses houses by size in Welwyn Garden City, and where 315 KNIGHTSFIELD lies on this distribution: 90% of detached houses houses are smaller than 315 KNIGHTSFIELD, and 9% of houses are larger. Note that EPC data is not available for all properties in Welwyn Garden City.

315 KNIGHTSFIELD: Plot and Title Map

315 KNIGHTSFIELD sits on a plot of roughly 0.246 of an acre, or 997m². The below map shows the location of 315 KNIGHTSFIELD, 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 315 KNIGHTSFIELD). 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 315 KNIGHTSFIELD?

315 KNIGHTSFIELD is located in WELWYN GARDEN CITY, in the AL8 postcode district. The below map shows the position of No. 315 on KNIGHTSFIELD.