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.
11 HILLSIDE is a small semi-detached house of 83m², built sometime between 1967 and 1975, which could now be worth an estimated £537,526. It was last sold for £547,000 in August 2025, which was around 7% below the average August 2025 semi-detached price in the Hillingdon local authority area. The most recent EPC inspection was September 2024, where the current energy rating was C, and the potential energy rating was B.
Land registry data shows one sale for 11 HILLSIDE since 1st January 1995. The below table shows the price paid for the one sale, along with the average semi-detached price in the Hillingdon local authority area for the corresponding sale date. The average price is sourced from the Office for National Statistics' House Price Index (HPI).
| Date | Price | HPI Price | Variation from HPI |
|---|---|---|---|
2025 8 AUG | £547,000 | £590,515 | 7% below HPI |
11 HILLSIDE might now be worth an estimated £537,526.
This is based on house price deflation of 1.7%, between August 2025 and May 2026, for semi-detached houses, in the Hillingdon local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 1.7% deflationary decrease is applied to the most recent sale price for 11 HILLSIDE of £547,000 on 8th August 2025. For the value to have decreased from £547,000 to £537,526 over the one year and three months to May 2026, the following assumptions must hold true:
11 HILLSIDE is 83m² according to the EPC inspection conducted in September 2024. This puts it in the smallest 40% of semi-detached houses in South Harefield, based on EPC data. The below chart shows the distribution of semi-detached houses by size in South Harefield, and where 11 HILLSIDE lies on this distribution: 39% of semi-detached houses are smaller than 11 HILLSIDE, and 61% of semi-detached houses are larger. Note that EPC data is not available for all properties in South Harefield.

11 HILLSIDE sits on a plot of roughly 0.066 of an acre, or 268m².
11 HILLSIDE is located in HAREFIELD, in the UB9 postcode district.
Most recent sales first: