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

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.

17 ROTHAMSTED AVENUE is a very large extended detached house of 364m², built sometime between 1930 and 1949, which could now be worth an estimated £5,337,518. It was last sold for £3,100,000 in January 2013, which was around 331% 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	£718,820	331% above HPI
2001 7 SEP	£1,150,000	£406,738	183% 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 183% above the HPI. So the extrapolation line tracks at 183% above the HPI over time, until the January 2013 sale, where it rises to 331% above the HPI. The line then continues to track at 331% above the HPI.

What might 17 ROTHAMSTED AVENUE be worth now?

17 ROTHAMSTED AVENUE might now be worth an estimated £5,337,518.

This is based on house price inflation of 72.2%, between January 2013 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 72.2% inflationary increase is applied to the most recent sale price for 17 ROTHAMSTED AVENUE of £3,100,000 on 8th January 2013. For the value to have increased from £3,100,000 to £5,337,518 over the eleven years and eleven months to February 2025, the following assumptions must hold true:

• The value of 17 ROTHAMSTED AVENUE has moved in line with the HPI for detached houses in the St Albans local authority area.
• The January 2013 sale price of £3,100,000 represented a fair market value for the property.
• The size, condition, and specification of 17 ROTHAMSTED AVENUE has not materially changed since January 2013.

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 houses in Harpenden, based on EPC data. The below chart shows the distribution of detached houses houses by size in Harpenden, and where 17 ROTHAMSTED AVENUE lies on this distribution: 93% of detached houses 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.