29, MARDLEY HILL, WELWYN, AL6 0TT - £857,000

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.

29 MARDLEY HILL is a large extended detached house of 218m², built sometime between 2003 and 2006, which could now be worth an estimated £947,299. It was last sold for £857,000 in February 2018, which was around 2% above the average February 2018 detached price in the Welwyn Hatfield local authority area. The most recent EPC inspection was March 2023, where the current energy rating was C, and the potential energy rating was B.

29 MARDLEY HILL Sold Prices

Land registry data shows seven sales for 29 MARDLEY HILL 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. Most of the seven 29 MARDLEY HILL 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
2018 20 FEB	£857,000	£842,218	2% above HPI
2013 7 NOV	£695,000	£579,695	20% above HPI
2007 30 NOV	£750,000	£530,810	41% above HPI
2004 16 JUL	£665,000	£447,051	49% above HPI
2001 4 JUL	£192,500	£339,459	43% below HPI
2000 21 NOV	£192,000	£320,381	40% below HPI
1998 16 MAR	£110,000	£219,832	50% below HPI

29 MARDLEY HILL 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 29 MARDLEY HILL sales between March 1998 and February 2018 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 2013 sale was for 20% above the HPI. So the extrapolation line tracks at 20% above the HPI over time, until the February 2018 sale, where it falls to 2% above the HPI. The line then continues to track at 2% above the HPI.

What might 29 MARDLEY HILL be worth now?

29 MARDLEY HILL might now be worth an estimated £947,299.

This is based on house price inflation of 10.5%, between February 2018 and March 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 10.5% inflationary increase is applied to the most recent sale price for 29 MARDLEY HILL of £857,000 on 20th February 2018. For the value to have increased from £857,000 to £947,299 over the six years and eleven months to March 2025, the following assumptions must hold true:

• The value of 29 MARDLEY HILL has moved in line with the HPI for detached houses in the Welwyn Hatfield local authority area.
• The February 2018 sale price of £857,000 represented a fair market value for the property.
• The size, condition, and specification of 29 MARDLEY HILL has not materially changed since February 2018.

How Large is 29 MARDLEY HILL?

29 MARDLEY HILL is 218m², which includes one extension, according to the EPC inspection conducted in March 2023. 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 29 MARDLEY HILL lies on this distribution: 80% of detached houses houses are smaller than 29 MARDLEY HILL, and 20% of houses are larger. Note that EPC data is not available for all properties in Oaklands.

29 MARDLEY HILL: Plot and Title Map

29 MARDLEY HILL sits on a plot of roughly 0.178 of an acre, or 721m². The below map shows the location of 29 MARDLEY HILL, 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 29 MARDLEY HILL). 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 29 MARDLEY HILL?

29 MARDLEY HILL is located in WELWYN, in the AL6 postcode district. The below map shows the position of No. 29 on MARDLEY HILL.