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.
17 MOUNTSIDE is a large extended detached house of 159m², built sometime between 1900 and 1929, which could now be worth an estimated £1,369,536. It was last sold for £775,000 in January 2010, which was around 45% above the average January 2010 detached price in the Guildford local authority area. The most recent EPC inspection was September 2009, where the current energy rating was E, and the potential energy rating was D.
Land registry data shows one sale for 17 MOUNTSIDE since 1st January 1995. The below table shows the price paid for the one sale, along with the average detached price in the Guildford 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 |
|---|---|---|---|
2010 29 JAN | £775,000 | £534,006 | 45% above HPI |
17 MOUNTSIDE might now be worth an estimated £1,369,536.
This is based on house price inflation of 76.7%, between January 2010 and April 2026, for detached houses, in the Guildford local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 76.7% inflationary increase is applied to the most recent sale price for 17 MOUNTSIDE of £775,000 on 29th January 2010. For the value to have increased from £775,000 to £1,369,536 over the fifteen years and nine months to April 2026, the following assumptions must hold true:
17 MOUNTSIDE is 159m², which includes two extensions, according to the EPC inspection conducted in September 2009. This puts it in the largest 40% of detached houses in Guildford, based on EPC data. The below chart shows the distribution of detached houses by size in Guildford, and where 17 MOUNTSIDE lies on this distribution: 65% of detached houses are smaller than 17 MOUNTSIDE, and 35% of detached houses are larger. Note that EPC data is not available for all properties in Guildford.

17 MOUNTSIDE sits on a plot of roughly 0.137 of an acre, or 556m².
17 MOUNTSIDE is located in GUILDFORD, in the GU2 postcode district.
Most recent sales first: