28, UPPER HARTWELL, STONE, AYLESBURY, HP17 8NZ - £842,500

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.

28 UPPER HARTWELL is a large extended detached house of 182m², built sometime before 1900, which could now be worth an estimated £969,650. It was last sold for £842,500 in May 2017, which was around 15% above the average May 2017 detached price in the Buckinghamshire local authority area. The most recent EPC inspection was September 2023, where the current energy rating was C, and the potential energy rating was C.

28 UPPER HARTWELL Sold Prices

Land registry data shows two sales for 28 UPPER HARTWELL since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Buckinghamshire local authority area for the corresponding sale date. Both of the two 28 UPPER HARTWELL 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
2017 11 MAY	£842,500	£735,230	15% above HPI
2000 12 DEC	£385,000	£300,041	28% above HPI

28 UPPER HARTWELL Price Paid vs. HPI Average

The below graph shows the average detached house price in the Buckinghamshire local authority area over time, sourced from the HPI. The two 28 UPPER HARTWELL sales from December 2000 and May 2017 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 2000 sale was for 28% above the HPI. So the extrapolation line tracks at 28% above the HPI over time, until the May 2017 sale, where it falls to 15% above the HPI. The line then continues to track at 15% above the HPI.

What might 28 UPPER HARTWELL be worth now?

28 UPPER HARTWELL might now be worth an estimated £969,650.

This is based on house price inflation of 15.1%, between May 2017 and February 2025, for detached houses, in the Buckinghamshire local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 15.1% inflationary increase is applied to the most recent sale price for 28 UPPER HARTWELL of £842,500 on 11th May 2017. For the value to have increased from £842,500 to £969,650 over the eight years and three months to February 2025, the following assumptions must hold true:

• The value of 28 UPPER HARTWELL has moved in line with the HPI for detached houses in the Buckinghamshire local authority area.
• The May 2017 sale price of £842,500 represented a fair market value for the property.
• The size, condition, and specification of 28 UPPER HARTWELL has not materially changed since May 2017.

How Large is 28 UPPER HARTWELL?

28 UPPER HARTWELL is 182m², which includes one extension, according to the EPC inspection conducted in September 2023. This puts it in the largest 30% of detached houses houses in Stone, based on EPC data. The below chart shows the distribution of detached houses houses by size in Stone, and where 28 UPPER HARTWELL lies on this distribution: 77% of detached houses houses are smaller than 28 UPPER HARTWELL, and 23% of houses are larger. Note that EPC data is not available for all properties in Stone.

28 UPPER HARTWELL: Plot and Title Map

28 UPPER HARTWELL sits on a plot of roughly 0.274 of an acre, or 1,107m². The below map shows the location of 28 UPPER HARTWELL, 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 28 UPPER HARTWELL). 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 28 UPPER HARTWELL?

28 UPPER HARTWELL is located in STONE, in the HP17 postcode district. The below map shows the position of No. 28 on UPPER HARTWELL.