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.
18 FLAG WALK is a midsized terraced house of 86m², built sometime between 1983 and 1990, which could now be worth an estimated £774,437. It was last sold for £145,000 in February 1998, which was around 71% above the average February 1998 terraced price in the Hillingdon local authority area. The most recent EPC inspection was July 2013, where the current energy rating was D, and the potential energy rating was B.
Land registry data shows one sale for 18 FLAG WALK since 1st January 1995. The below table shows the price paid for the one sale, along with the average terraced 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 |
|---|---|---|---|
1998 6 FEB | £145,000 | £84,981 | 71% above HPI |
18 FLAG WALK might now be worth an estimated £774,437.
This is based on house price inflation of 434.1%, between February 1998 and May 2026, for terraced 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 434.1% inflationary increase is applied to the most recent sale price for 18 FLAG WALK of £145,000 on 6th February 1998. For the value to have increased from £145,000 to £774,437 over the 27 years and nine months to May 2026, the following assumptions must hold true:
18 FLAG WALK is 86m² according to the EPC inspection conducted in July 2013. This puts it in the largest 50% of terraced houses in Ruislip, based on EPC data. The below chart shows the distribution of terraced houses by size in Ruislip, and where 18 FLAG WALK lies on this distribution: 56% of terraced houses are smaller than 18 FLAG WALK, and 43% of terraced houses are larger. Note that EPC data is not available for all properties in Ruislip.

18 FLAG WALK sits on a plot of roughly 0.697 of an acre, or 2,819m².
18 FLAG WALK is located in PINNER, in the HA5 postcode district.
Most recent sales first: