17, ROTHAMSTED AVENUE, HARPENDEN, AL5 2DN - £3,100,000

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

17 ROTHAMSTED AVENUE is a very large extended detached house of 364m², built sometime between 1930 and 1949. It was last sold for £3,100,000 in January 2013, which was around 359% above the average January 2013 detached price in the St Albans local authority area. The most recent EPC inspection was July 2012, where the current energy rating was D, and the potential energy rating was C.

17 ROTHAMSTED AVENUE Sold Prices

Land registry data shows two sales for 17 ROTHAMSTED AVENUE 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 17 ROTHAMSTED AVENUE 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
2013 8 JAN	£3,100,000	£675,128	359% above HPI
2001 7 SEP	£1,150,000	£382,015	201% above HPI

17 ROTHAMSTED AVENUE 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 17 ROTHAMSTED AVENUE sales from September 2001 and January 2013 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 September 2001 sale was for 201% above the HPI. So the extrapolation line tracks at 201% above the HPI over time, until the January 2013 sale, where it rises to 359% above the HPI. The line then continues to track at 359% above the HPI.

How Large is 17 ROTHAMSTED AVENUE?

17 ROTHAMSTED AVENUE is 364m², which includes two extensions, according to the EPC inspection conducted in July 2012. This puts it in the largest 10% of detached houses in Harpenden, based on EPC data. The below chart shows the distribution of detached houses by size in Harpenden, and where 17 ROTHAMSTED AVENUE lies on this distribution: 93% of detached houses are smaller than 17 ROTHAMSTED AVENUE, and 7% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

17 ROTHAMSTED AVENUE: Plot and Title Map

17 ROTHAMSTED AVENUE sits on a plot of roughly 0.541 of an acre, or 2,190m². The below map shows the location of 17 ROTHAMSTED AVENUE, 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 17 ROTHAMSTED AVENUE). 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 17 ROTHAMSTED AVENUE?

17 ROTHAMSTED AVENUE is located in HARPENDEN, in the AL5 postcode district. The below map shows the position of No. 17 on ROTHAMSTED AVENUE.