18, NETHERFIELD ROAD, HARPENDEN, AL5 2AG - £1,350,000

Based on the January 2025 Price Paid Data (released on 3rd March 2025), the December 2024 House Price Index (released on 19th February 2025), and the January 2025 Energy Performance of Buildings Data (released on 27th February 2025). Sources

18 NETHERFIELD ROAD is a large extended detached house of 198m², built sometime between 1983 and 1990, which could now be worth an estimated £1,600,430. It was last sold for £1,350,000 in August 2018, which was around 29% above the average August 2018 detached price in the St Albans local authority area. The most recent EPC inspection was February 2018, where the current energy rating was C, and the potential energy rating was B.

18 NETHERFIELD ROAD Sold Prices

Land registry data shows two sales for 18 NETHERFIELD ROAD 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 NETHERFIELD ROAD 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
2018 23 AUG	£1,350,000	£1,049,790	29% above HPI
2014 5 SEP	£1,000,000	£838,509	19% above HPI

18 NETHERFIELD ROAD 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 NETHERFIELD ROAD sales from September 2014 and August 2018 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 2014 sale was for 19% above the HPI. So the extrapolation line tracks at 19% above the HPI over time, until the August 2018 sale, where it rises to 29% above the HPI. The line then continues to track at 29% above the HPI.

What might 18 NETHERFIELD ROAD be worth now?

18 NETHERFIELD ROAD might now be worth an estimated £1,600,430.

This is based on house price inflation of 18.6%, between August 2018 and December 2024, 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 18.6% inflationary increase is applied to the most recent sale price for 18 NETHERFIELD ROAD of £1,350,000 on 23rd August 2018. For the value to have increased from £1,350,000 to £1,600,430 over the five years and eight months to December 2024, the following assumptions must hold true:

• The value of 18 NETHERFIELD ROAD has moved in line with the HPI for detached houses in the St Albans local authority area.
• The August 2018 sale price of £1,350,000 represented a fair market value for the property.
• The size, condition, and specification of 18 NETHERFIELD ROAD has not materially changed since August 2018.

How Large is 18 NETHERFIELD ROAD?

18 NETHERFIELD ROAD is 198m², which includes one extension, according to the EPC inspection conducted in February 2018. 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 NETHERFIELD ROAD lies on this distribution: 65% of detached houses houses are smaller than 18 NETHERFIELD ROAD, and 34% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

18 NETHERFIELD ROAD: Plot and Title Map

18 NETHERFIELD ROAD sits on a plot of roughly 0.201 of an acre, or 815m². The below map shows the location of 18 NETHERFIELD ROAD, 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 NETHERFIELD ROAD). 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 NETHERFIELD ROAD?

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