18, MARQUIS LANE, HARPENDEN, AL5 5AA - £650,000

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.

18 MARQUIS LANE is a large extended detached house of 218m², built sometime between 1930 and 1949, which could now be worth an estimated £1,418,893. It was last sold for £650,000 in July 2009, which was around 15% above the average July 2009 detached price in the St Albans local authority area. The most recent EPC inspection was October 2023, where the current energy rating was D, and the potential energy rating was C.

18 MARQUIS LANE Sold Prices

Land registry data shows two sales for 18 MARQUIS LANE since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the St Albans local authority area for the corresponding sale date. Both of the two 18 MARQUIS LANE 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
2009 10 JUL	£650,000	£566,972	15% above HPI
2002 12 JUN	£495,000	£446,139	11% above HPI

18 MARQUIS LANE Price Paid vs. HPI Average

The below graph shows the average detached house price in the St Albans local authority area over time, sourced from the HPI. The two 18 MARQUIS LANE sales from June 2002 and July 2009 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 June 2002 sale was for 11% above the HPI. So the extrapolation line tracks at 11% above the HPI over time, until the July 2009 sale, where it rises to 15% above the HPI. The line then continues to track at 15% above the HPI.

What might 18 MARQUIS LANE be worth now?

18 MARQUIS LANE might now be worth an estimated £1,418,893.

This is based on house price inflation of 118.3%, between July 2009 and February 2025, for detached houses, in the St Albans local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 118.3% inflationary increase is applied to the most recent sale price for 18 MARQUIS LANE of £650,000 on 10th July 2009. For the value to have increased from £650,000 to £1,418,893 over the sixteen years and five months to February 2025, the following assumptions must hold true:

• The value of 18 MARQUIS LANE has moved in line with the HPI for detached houses in the St Albans local authority area.
• The July 2009 sale price of £650,000 represented a fair market value for the property.
• The size, condition, and specification of 18 MARQUIS LANE has not materially changed since July 2009.

How Large is 18 MARQUIS LANE?

18 MARQUIS LANE is 218m², which includes three extensions, according to the EPC inspection conducted in October 2023. This puts it in the largest 30% of detached houses houses in Harpenden, based on EPC data. The below chart shows the distribution of detached houses houses by size in Harpenden, and where 18 MARQUIS LANE lies on this distribution: 72% of detached houses houses are smaller than 18 MARQUIS LANE, and 27% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

18 MARQUIS LANE: Plot and Title Map

18 MARQUIS LANE sits on a plot of roughly 0.113 of an acre, or 457m². The below map shows the location of 18 MARQUIS LANE, 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 18 MARQUIS LANE). 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 18 MARQUIS LANE?

18 MARQUIS LANE is located in HARPENDEN, in the AL5 postcode district. The below map shows the position of No. 18 on MARQUIS LANE.