21, FLAG WALK, PINNER, HA5 2EP - £560,000

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 FLAG WALK is a small extended terraced house of 109m², built sometime between 1976 and 1982, which could now be worth an estimated £562,094. It was last sold for £560,000 in March 2025, which was around 23% above the average March 2025 terraced price in the Hillingdon local authority area. The most recent EPC inspection was November 2024, where the current energy rating was D, and the potential energy rating was B.

21 FLAG WALK Sold Prices

Land registry data shows three sales for 21 FLAG WALK since 1^st January 1995. The below table shows the price paid for the three sales, along with the average terraced price in the Hillingdon local authority area for the corresponding sale date. All of the three 21 FLAG WALK sales were 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
2025 28 MAR	£560,000	£454,921	23% above HPI
2000 22 NOV	£212,000	£124,192	71% above HPI
1999 19 FEB	£155,000	£92,225	68% above HPI

21 FLAG WALK Price Paid vs. HPI Average

The below graph shows the average terraced house price in the Hillingdon local authority area over time, sourced from the HPI. The three 21 FLAG WALK sales between February 1999 and March 2025 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 November 2000 sale was for 71% above the HPI. So the extrapolation line tracks at 71% above the HPI over time, until the March 2025 sale, where it falls to 23% above the HPI. The line then continues to track at 23% above the HPI.

What might 21 FLAG WALK be worth now?

21 FLAG WALK might now be worth an estimated £562,094.

This is based on house price inflation of 0.4%, between March 2025 and April 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 0.4% inflationary increase is applied to the most recent sale price for 21 FLAG WALK of £560,000 on 28th March 2025. For the value to have increased from £560,000 to £562,094 over the eleven months to April 2026, the following assumptions must hold true:

• The value of 21 FLAG WALK has moved in line with the HPI for terraced houses in the Hillingdon local authority area.
• The March 2025 sale price of £560,000 represented a fair market value for the property.
• The size, condition, and specification of 21 FLAG WALK has not materially changed since March 2025.

How Large is 21 FLAG WALK?

21 FLAG WALK is 109m², which includes one extension, according to the EPC inspection conducted in November 2024. This puts it in the smallest 40% of terraced houses houses in Ruislip, based on EPC data. The below chart shows the distribution of terraced houses houses by size in Ruislip, and where 21 FLAG WALK lies on this distribution: 40% of terraced houses houses are smaller than 21 FLAG WALK, and 60% of houses are larger. Note that EPC data is not available for all properties in Ruislip.

21 FLAG WALK: Plot and Title Map

21 FLAG WALK sits on a plot of roughly 0.028 of an acre, or 114m². The below map shows the location of 21 FLAG WALK, an approximate outline of the building(s), and the indicative extent of the property. The plot extent is a Land Registry INSPIRE Index Polygon, and it is important to note that a title may include more than one polygon, whereas only one polygon is shown on the map (the polygon which intersects with the position of 21 FLAG WALK). The full extent of the land contained in any registered title can only be identified from the individual title plan. The maps on this page should not be relied upon to establish the extent of a title.

Where is 21 FLAG WALK?

21 FLAG WALK is located in PINNER, in the HA5 postcode district. The below map shows the position of No. 21 on FLAG WALK.