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.
25 OLD CONVENT is a very large detached house of 443m², built sometime before 1900, which could now be worth an estimated £252,910. It was last sold for £137,635 in March 2007, which was around 65% below the average March 2007 detached price in the Mid Sussex local authority area. The most recent EPC inspection was August 2010, where the current energy rating was G, and the potential energy rating was E.
Land registry data shows two sales for 25 OLD CONVENT since 1st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Mid Sussex local authority area for the corresponding sale date. One of the two 25 OLD CONVENT sales was for below the average price, whilst the other was 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 |
|---|---|---|---|
2007 19 MAR | £137,635 | £398,464 | 65% below HPI |
1997 16 DEC | £390,000 | £161,657 | 141% above HPI |
The below graph shows the average detached house price in the Mid Sussex local authority area over time, sourced from the HPI. The two 25 OLD CONVENT sales from December 1997 and March 2007 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 December 1997 sale was for 141% above the HPI. So the extrapolation line tracks at 141% above the HPI over time, until the March 2007 sale, where it falls to 65% below the HPI. The line then continues to track at 65% below the HPI.

25 OLD CONVENT might now be worth an estimated £252,910.
This is based on house price inflation of 83.8%, between March 2007 and May 2026, for detached houses, in the Mid Sussex local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 83.8% inflationary increase is applied to the most recent sale price for 25 OLD CONVENT of £137,635 on 19th March 2007. For the value to have increased from £137,635 to £252,910 over the eighteen years and ten months to May 2026, the following assumptions must hold true:
25 OLD CONVENT is 443m² according to the EPC inspection conducted in August 2010. This puts it in the largest 10% of detached houses in East Grinstead, based on EPC data. The below chart shows the distribution of detached houses by size in East Grinstead, and where 25 OLD CONVENT lies on this distribution: More than 99% of detached houses are smaller than 25 OLD CONVENT, and less than 1% of detached houses are larger. Note that EPC data is not available for all properties in East Grinstead.

Most recent sales first: