6, MARDLEY DELL, WELWYN, AL6 0UR - £745,000

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.

6 MARDLEY DELL is a very large detached house of 225m², built sometime between 1991 and 1995, which could now be worth an estimated £1,257,259. It was last sold for £745,000 in October 2010, which was around 34% above the average October 2010 detached price in the Welwyn Hatfield local authority area. The most recent EPC inspection was February 2010, where the current energy rating was D, and the potential energy rating was D.

6 MARDLEY DELL Sold Prices

Land registry data shows two sales for 6 MARDLEY DELL 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. Both of the two 6 MARDLEY DELL 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
2010 1 OCT	£745,000	£555,797	34% above HPI
1997 29 OCT	£365,000	£217,820	68% above HPI

6 MARDLEY DELL 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 6 MARDLEY DELL sales from October 1997 and October 2010 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 October 1997 sale was for 68% above the HPI. So the extrapolation line tracks at 68% above the HPI over time, until the October 2010 sale, where it falls to 34% above the HPI. The line then continues to track at 34% above the HPI.

What might 6 MARDLEY DELL be worth now?

6 MARDLEY DELL might now be worth an estimated £1,257,259.

This is based on house price inflation of 68.8%, between October 2010 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 68.8% inflationary increase is applied to the most recent sale price for 6 MARDLEY DELL of £745,000 on 1st October 2010. For the value to have increased from £745,000 to £1,257,259 over the fifteen years and eight months to February 2025, the following assumptions must hold true:

• The value of 6 MARDLEY DELL has moved in line with the HPI for detached houses in the Welwyn Hatfield local authority area.
• The October 2010 sale price of £745,000 represented a fair market value for the property.
• The size, condition, and specification of 6 MARDLEY DELL has not materially changed since October 2010.

How Large is 6 MARDLEY DELL?

6 MARDLEY DELL is 225m² according to the EPC inspection conducted in February 2010. This puts it in the largest 20% of detached houses houses in Oaklands, based on EPC data. The below chart shows the distribution of detached houses houses by size in Oaklands, and where 6 MARDLEY DELL lies on this distribution: 82% of detached houses houses are smaller than 6 MARDLEY DELL, and 18% of houses are larger. Note that EPC data is not available for all properties in Oaklands.

6 MARDLEY DELL: Plot and Title Map

6 MARDLEY DELL sits on a plot of roughly 0.293 of an acre, or 1,185m². The below map shows the location of 6 MARDLEY DELL, 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 6 MARDLEY DELL). 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 6 MARDLEY DELL?

6 MARDLEY DELL is located in WELWYN, in the AL6 postcode district. The below map shows the position of No. 6 on MARDLEY DELL.