27, ILLINGWORTH, WINDSOR, SL4 4UP - £960,000

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

27 ILLINGWORTH is a very large extended detached house of 302m², built sometime between 1967 and 1975, which could now be worth an estimated £1,217,614. It was last sold for £960,000 in October 2015, which was around 10% above the average October 2015 detached price in the Windsor and Maidenhead local authority area. The most recent EPC inspection was January 2017, where the current energy rating was D, and the potential energy rating was C.

27 ILLINGWORTH Sold Prices

Land registry data shows four sales for 27 ILLINGWORTH since 1^st January 1995. The below table shows the price paid for the four sales, along with the average detached price in the Windsor and Maidenhead local authority area for the corresponding sale date. All of the four 27 ILLINGWORTH 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
2015 23 OCT	£960,000	£874,413	10% above HPI
2000 15 NOV	£548,500	£401,665	37% above HPI
1998 11 DEC	£395,000	£284,908	39% above HPI
1996 24 MAY	£268,000	£192,704	39% above HPI

27 ILLINGWORTH Price Paid vs. HPI Average

The below graph shows the average detached house price in the Windsor and Maidenhead local authority area over time, sourced from the HPI. The four 27 ILLINGWORTH sales between May 1996 and October 2015 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 November 2000 sale was for 37% above the HPI. So the extrapolation line tracks at 37% above the HPI over time, until the October 2015 sale, where it falls to 10% above the HPI. The line then continues to track at 10% above the HPI.

What might 27 ILLINGWORTH be worth now?

27 ILLINGWORTH might now be worth an estimated £1,217,614.

This is based on house price inflation of 26.8%, between October 2015 and December 2024, for detached houses, in the Windsor and Maidenhead local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 26.8% inflationary increase is applied to the most recent sale price for 27 ILLINGWORTH of £960,000 on 23rd October 2015. For the value to have increased from £960,000 to £1,217,614 over the eight years and ten months to December 2024, the following assumptions must hold true:

• The value of 27 ILLINGWORTH has moved in line with the HPI for detached houses in the Windsor and Maidenhead local authority area.
• The October 2015 sale price of £960,000 represented a fair market value for the property.
• The size, condition, and specification of 27 ILLINGWORTH has not materially changed since October 2015.

How Large is 27 ILLINGWORTH?

27 ILLINGWORTH is 302m², which includes two extensions, according to the EPC inspection conducted in January 2017. This puts it in the largest 10% of detached houses houses in Windsor, based on EPC data. The below chart shows the distribution of detached houses houses by size in Windsor, and where 27 ILLINGWORTH lies on this distribution: 95% of detached houses houses are smaller than 27 ILLINGWORTH, and 5% of houses are larger. Note that EPC data is not available for all properties in Windsor.

27 ILLINGWORTH: Plot and Title Map

27 ILLINGWORTH sits on a plot of roughly 0.390 of an acre, or 1,580m². The below map shows the location of 27 ILLINGWORTH, 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 27 ILLINGWORTH). 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 27 ILLINGWORTH?

27 ILLINGWORTH is located in WINDSOR, in the SL4 postcode district. The below map shows the position of No. 27 on ILLINGWORTH.