18, BYRON ROAD, HARPENDEN, AL5 4AB - £1,675,000

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 BYRON ROAD is a large extended detached house of 226m², built sometime between 1983 and 1990, which could now be worth an estimated £1,613,467. It was last sold for £1,675,000 in October 2024, which was around 35% above the average October 2024 detached price in the St Albans local authority area. The most recent EPC inspection was January 2024, where the current energy rating was C, and the potential energy rating was C.

18 BYRON ROAD Sold Prices

Land registry data shows three sales for 18 BYRON ROAD since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the St Albans local authority area for the corresponding sale date. All of the three 18 BYRON 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
2024 3 OCT	£1,675,000	£1,237,750	35% above HPI
2019 12 JUL	£1,285,000	£1,010,660	27% above HPI
2002 11 JUN	£575,000	£446,139	29% above HPI

18 BYRON 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 three 18 BYRON ROAD sales between June 2002 and October 2024 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 July 2019 sale was for 27% above the HPI. So the extrapolation line tracks at 27% above the HPI over time, until the October 2024 sale, where it rises to 35% above the HPI. The line then continues to track at 35% above the HPI.

What might 18 BYRON ROAD be worth now?

18 BYRON ROAD might now be worth an estimated £1,613,467.

This is based on house price deflation of 3.7%, between October 2024 and June 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 3.7% deflationary decrease is applied to the most recent sale price for 18 BYRON ROAD of £1,675,000 on 3rd October 2024. For the value to have decreased from £1,675,000 to £1,613,467 over the one year and four months to June 2025, the following assumptions must hold true:

• The value of 18 BYRON ROAD has moved in line with the HPI for detached houses in the St Albans local authority area.
• The October 2024 sale price of £1,675,000 represented a fair market value for the property.
• The size, condition, and specification of 18 BYRON ROAD has not materially changed since October 2024.

How Large is 18 BYRON ROAD?

18 BYRON ROAD is 226m², which includes one extension, according to the EPC inspection conducted in January 2024. 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 BYRON ROAD lies on this distribution: 75% of detached houses houses are smaller than 18 BYRON ROAD, and 25% of houses are larger. Note that EPC data is not available for all properties in Harpenden.

18 BYRON ROAD: Plot and Title Map

18 BYRON ROAD sits on a plot of roughly 0.155 of an acre, or 629m². The below map shows the location of 18 BYRON 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 BYRON 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 BYRON ROAD?

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