18, THE ISLAND, THAMES DITTON, KT7 0SH - £1,050,000

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 THE ISLAND is a very small extended detached house of 95m², built sometime between 1900 and 1929, which could now be worth an estimated £1,234,709. It was last sold for £1,050,000 in January 2018, which was around 15% below the average January 2018 detached price in the Elmbridge local authority area. The most recent EPC inspection was October 2010, where the current energy rating was E, and the potential energy rating was D.

18 THE ISLAND Sold Prices

Land registry data shows four sales for 18 THE ISLAND since 1^st January 1995. The below table shows the price paid for the four sales, along with the average detached price in the Elmbridge local authority area for the corresponding sale date. All of the four 18 THE ISLAND sales were for below 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 18 JAN	£1,050,000	£1,238,680	15% below HPI
2011 1 APR	£850,000	£860,441	1% below HPI
2008 18 JUL	£735,000	£844,293	13% below HPI
2005 29 APR	£520,000	£654,237	21% below HPI

18 THE ISLAND Price Paid vs. HPI Average

The below graph shows the average detached house price in the Elmbridge local authority area over time, sourced from the HPI. The four 18 THE ISLAND sales between April 2005 and January 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 April 2011 sale was for 1% below the HPI. So the extrapolation line tracks at 1% below the HPI over time, until the January 2018 sale, where it falls to 15% below the HPI. The line then continues to track at 15% below the HPI.

What might 18 THE ISLAND be worth now?

18 THE ISLAND might now be worth an estimated £1,234,709.

This is based on house price inflation of 17.6%, between January 2018 and December 2024, for detached houses, in the Elmbridge local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 17.6% inflationary increase is applied to the most recent sale price for 18 THE ISLAND of £1,050,000 on 18th January 2018. For the value to have increased from £1,050,000 to £1,234,709 over the five years and one month to December 2024, the following assumptions must hold true:

• The value of 18 THE ISLAND has moved in line with the HPI for detached houses in the Elmbridge local authority area.
• The January 2018 sale price of £1,050,000 represented a fair market value for the property.
• The size, condition, and specification of 18 THE ISLAND has not materially changed since January 2018.

How Large is 18 THE ISLAND?

18 THE ISLAND is 95m², which includes one extension, according to the EPC inspection conducted in October 2010. This puts it in the smallest 10% of detached houses houses in Thames Ditton, based on EPC data. The below chart shows the distribution of detached houses houses by size in Thames Ditton, and where 18 THE ISLAND lies on this distribution: 8% of detached houses houses are smaller than 18 THE ISLAND, and 92% of houses are larger. Note that EPC data is not available for all properties in Thames Ditton.

18 THE ISLAND: Plot and Title Map

18 THE ISLAND sits on a plot of roughly 0.103 of an acre, or 416m². The below map shows the location of 18 THE ISLAND, 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 THE ISLAND). 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 THE ISLAND?

18 THE ISLAND is located in THAMES DITTON, in the KT7 postcode district. The below map shows the position of No. 18 on THE ISLAND.