31, DUPORTH BAY, DUPORTH, ST AUSTELL, PL26 6AF - £487,000

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.

31 DUPORTH BAY is a very large extended detached house of 206m², built sometime between 1967 and 1975, which could now be worth an estimated £759,309. It was last sold for £487,000 in March 2011, which was around 74% above the average March 2011 detached price in the Cornwall local authority area. The most recent EPC inspection was January 2025, where the current energy rating was D, and the potential energy rating was C.

31 DUPORTH BAY Sold Prices

Land registry data shows two sales for 31 DUPORTH BAY since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Cornwall local authority area for the corresponding sale date. Both of the two 31 DUPORTH BAY 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
2011 25 MAR	£487,000	£280,428	74% above HPI
1999 24 SEP	£186,000	£100,296	85% above HPI

31 DUPORTH BAY Price Paid vs. HPI Average

The below graph shows the average detached house price in the Cornwall local authority area over time, sourced from the HPI. The two 31 DUPORTH BAY sales from September 1999 and March 2011 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 September 1999 sale was for 85% above the HPI. So the extrapolation line tracks at 85% above the HPI over time, until the March 2011 sale, where it falls to 74% above the HPI. The line then continues to track at 74% above the HPI.

What might 31 DUPORTH BAY be worth now?

31 DUPORTH BAY might now be worth an estimated £759,309.

This is based on house price inflation of 55.9%, between March 2011 and February 2025, for detached houses, in the Cornwall local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 55.9% inflationary increase is applied to the most recent sale price for 31 DUPORTH BAY of £487,000 on 25th March 2011. For the value to have increased from £487,000 to £759,309 over the fourteen years and one month to February 2025, the following assumptions must hold true:

• The value of 31 DUPORTH BAY has moved in line with the HPI for detached houses in the Cornwall local authority area.
• The March 2011 sale price of £487,000 represented a fair market value for the property.
• The size, condition, and specification of 31 DUPORTH BAY has not materially changed since March 2011.

How Large is 31 DUPORTH BAY?

31 DUPORTH BAY is 206m², which includes three extensions, according to the EPC inspection conducted in January 2025. This puts it in the largest 20% of detached houses houses in Duporth, based on EPC data. The below chart shows the distribution of detached houses houses by size in Duporth, and where 31 DUPORTH BAY lies on this distribution: 86% of detached houses houses are smaller than 31 DUPORTH BAY, and 14% of houses are larger. Note that EPC data is not available for all properties in Duporth.

31 DUPORTH BAY: Plot and Title Map

31 DUPORTH BAY sits on a plot of roughly 0.206 of an acre, or 834m². The below map shows the location of 31 DUPORTH BAY, 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 31 DUPORTH BAY). 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 31 DUPORTH BAY?

31 DUPORTH BAY is located in DUPORTH, in the PL26 postcode district. The below map shows the position of No. 31 on DUPORTH BAY.