18, GRASMERE AVENUE, HARPENDEN, AL5 5PS - £1,200,000

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 GRASMERE AVENUE is a large extended detached house of 190m², built sometime between 1950 and 1966, which could now be worth an estimated £2,054,003. It was last sold for £1,200,000 in September 2012, which was around 66% above the average September 2012 detached price in the St Albans local authority area. The most recent EPC inspection was January 2011, where the current energy rating was D, and the potential energy rating was C.

18 GRASMERE AVENUE Sold Prices

Land registry data shows two sales for 18 GRASMERE 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 18 GRASMERE 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
2012 18 SEP	£1,200,000	£723,066	66% above HPI
2007 23 AUG	£900,000	£655,214	37% above HPI

18 GRASMERE 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 18 GRASMERE AVENUE sales from August 2007 and September 2012 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 August 2007 sale was for 37% above the HPI. So the extrapolation line tracks at 37% above the HPI over time, until the September 2012 sale, where it rises to 66% above the HPI. The line then continues to track at 66% above the HPI.

What might 18 GRASMERE AVENUE be worth now?

18 GRASMERE AVENUE might now be worth an estimated £2,054,003.

This is based on house price inflation of 71.2%, between September 2012 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 71.2% inflationary increase is applied to the most recent sale price for 18 GRASMERE AVENUE of £1,200,000 on 18th September 2012. For the value to have increased from £1,200,000 to £2,054,003 over the thirteen years and seven months to February 2025, the following assumptions must hold true:

• The value of 18 GRASMERE AVENUE has moved in line with the HPI for detached houses in the St Albans local authority area.
• The September 2012 sale price of £1,200,000 represented a fair market value for the property.
• The size, condition, and specification of 18 GRASMERE AVENUE has not materially changed since September 2012.

How Large is 18 GRASMERE AVENUE?

18 GRASMERE AVENUE is 190m², which includes two extensions, according to the EPC inspection conducted in January 2011. This puts it in the largest 40% 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 GRASMERE AVENUE lies on this distribution: 63% of detached houses houses are smaller than 18 GRASMERE AVENUE, and 37% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

18 GRASMERE AVENUE: Plot and Title Map

18 GRASMERE AVENUE sits on a plot of roughly 0.185 of an acre, or 748m². The below map shows the location of 18 GRASMERE 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 18 GRASMERE 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 18 GRASMERE AVENUE?

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