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.
21 ONSLOW AVENUE is a very large extended detached house of 270m², built sometime between 1930 and 1949, which could now be worth an estimated £1,792,882. It was last sold for £790,000 in September 2004, which was around 76% above the average September 2004 detached price in the Sutton local authority area. The most recent EPC inspection was April 2023, where the current energy rating was C, and the potential energy rating was C.
Land registry data shows one sale for 21 ONSLOW AVENUE since 1st January 1995. The below table shows the price paid for the one sale, along with the average detached price in the Sutton 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 |
|---|---|---|---|
2004 1 SEP | £790,000 | £448,501 | 76% above HPI |
21 ONSLOW AVENUE might now be worth an estimated £1,792,882.
This is based on house price inflation of 126.9%, between September 2004 and May 2026, for detached houses, in the Sutton local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 126.9% inflationary increase is applied to the most recent sale price for 21 ONSLOW AVENUE of £790,000 on 1st September 2004. For the value to have increased from £790,000 to £1,792,882 over the 22 years and four months to May 2026, the following assumptions must hold true:
21 ONSLOW AVENUE is 270m², which includes three extensions, according to the EPC inspection conducted in April 2023. This puts it in the largest 20% of detached houses in London, based on EPC data. The below chart shows the distribution of detached houses by size in London, and where 21 ONSLOW AVENUE lies on this distribution: 87% of detached houses are smaller than 21 ONSLOW AVENUE, and 12% of detached houses are larger. Note that EPC data is not available for all properties in London.

21 ONSLOW AVENUE sits on a plot of roughly 0.471 of an acre, or 1,908m².
21 ONSLOW AVENUE is located in SUTTON, in the SM2 postcode district.
Most recent sales first: