9, MARDLEY HEIGHTS, WELWYN, AL6 0TX - £200,000

Based on the December 2024 Price Paid Data (released on 29th January 2025), the November 2024 House Price Index (released on 15th January 2025), and the December 2024 Energy Performance of Buildings Data (released on 31st January 2025). Sources

9 MARDLEY HEIGHTS is a large extended detached house of 178m², built sometime between 1967 and 1975. It was last sold for £200,000 in November 2005, which was around 55% below the average November 2005 detached price in the Welwyn Hatfield local authority area. The most recent EPC inspection was February 2011, where the current energy rating was F, and the potential energy rating was E.

9 MARDLEY HEIGHTS Sold Prices

Land registry data shows two sales for 9 MARDLEY HEIGHTS 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 9 MARDLEY HEIGHTS sales was for below 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
2005 4 NOV	£200,000	£446,679	55% below HPI
1997 19 DEC	£290,000	£205,487	41% above HPI

9 MARDLEY HEIGHTS 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 9 MARDLEY HEIGHTS sales from December 1997 and November 2005 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 December 1997 sale was for 41% above the HPI. So the extrapolation line tracks at 41% above the HPI over time, until the November 2005 sale, where it falls to 55% below the HPI. The line then continues to track at 55% below the HPI.

How Large is 9 MARDLEY HEIGHTS?

9 MARDLEY HEIGHTS is 178m², which includes one extension, according to the EPC inspection conducted in February 2011. This puts it in the largest 40% of detached houses in Oaklands, based on EPC data. The below chart shows the distribution of detached houses by size in Oaklands, and where 9 MARDLEY HEIGHTS lies on this distribution: 63% of detached houses are smaller than 9 MARDLEY HEIGHTS, and 37% of houses are larger. Note that EPC data is not available for all properties in Oaklands.

9 MARDLEY HEIGHTS: Plot and Title Map

9 MARDLEY HEIGHTS sits on a plot of roughly 0.168 of an acre, or 678m². The below map shows the location of 9 MARDLEY HEIGHTS, 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 9 MARDLEY HEIGHTS). 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 9 MARDLEY HEIGHTS?

9 MARDLEY HEIGHTS is located in WELWYN, in the AL6 postcode district. The below map shows the position of No. 9 on MARDLEY HEIGHTS.