23, MARTLESHAM, WELWYN GARDEN CITY, AL7 2QF - £510,000

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.

23 MARTLESHAM is a small extended detached house of 100m², built sometime between 1983 and 1990, which could now be worth an estimated £486,831. It was last sold for £510,000 in August 2023, which was around 48% below the average August 2023 detached price in the Welwyn Hatfield local authority area. The most recent EPC inspection was May 2016, where the current energy rating was D, and the potential energy rating was B.

23 MARTLESHAM Sold Prices

Land registry data shows seven sales for 23 MARTLESHAM since 1^st January 1995. The below table shows the price paid for the seven sales, along with the average detached price in the Welwyn Hatfield local authority area for the corresponding sale date. All of the seven 23 MARTLESHAM 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
2023 31 AUG	£510,000	£982,599	48% below HPI
2023 9 MAR	£550,000	£954,256	42% below HPI
2015 9 OCT	£430,000	£728,047	41% below HPI
2012 13 JAN	£300,000	£539,509	44% below HPI
2005 21 APR	£285,000	£438,388	35% below HPI
2004 7 DEC	£250,000	£462,497	46% below HPI
1996 30 OCT	£103,500	£173,497	40% below HPI

23 MARTLESHAM 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 seven 23 MARTLESHAM sales between October 1996 and August 2023 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 March 2023 sale was for 42% below the HPI. So the extrapolation line tracks at 42% below the HPI over time, until the August 2023 sale, where it falls to 48% below the HPI. The line then continues to track at 48% below the HPI.

What might 23 MARTLESHAM be worth now?

23 MARTLESHAM might now be worth an estimated £486,831.

This is based on house price deflation of 4.5%, between August 2023 and February 2025, 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 4.5% deflationary decrease is applied to the most recent sale price for 23 MARTLESHAM of £510,000 on 31st August 2023. For the value to have decreased from £510,000 to £486,831 over the two years and six months to February 2025, the following assumptions must hold true:

• The value of 23 MARTLESHAM has moved in line with the HPI for detached houses in the Welwyn Hatfield local authority area.
• The August 2023 sale price of £510,000 represented a fair market value for the property.
• The size, condition, and specification of 23 MARTLESHAM has not materially changed since August 2023.

How Large is 23 MARTLESHAM?

23 MARTLESHAM is 100m², which includes one extension, according to the EPC inspection conducted in May 2016. This puts it in the smallest 30% 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 23 MARTLESHAM lies on this distribution: 24% of detached houses houses are smaller than 23 MARTLESHAM, and 75% of houses are larger. Note that EPC data is not available for all properties in Welwyn Garden City.

23 MARTLESHAM: Plot and Title Map

23 MARTLESHAM sits on a plot of roughly 0.069 of an acre, or 281m². The below map shows the location of 23 MARTLESHAM, 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 23 MARTLESHAM). 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 23 MARTLESHAM?

23 MARTLESHAM is located in WELWYN GARDEN CITY, in the AL7 postcode district. The below map shows the position of No. 23 on MARTLESHAM.