ROCK HOUSE, RILLA MILL, CALLINGTON, PL17 7NT - £340,000

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.

ROCK HOUSE is a large detached house of 118m², built sometime before 1900, which could now be worth an estimated £334,282. It was last sold for £340,000 in February 2025, which was around 21% below the average February 2025 detached price in the Cornwall local authority area. The most recent EPC inspection was September 2015, where the current energy rating was E, and the potential energy rating was C.

ROCK HOUSE Sold Prices

Land registry data shows six sales for ROCK HOUSE since 1^st January 1995. The below table shows the price paid for the six sales, along with the average detached price in the Cornwall local authority area for the corresponding sale date. The six ROCK HOUSE sales were a mix of below the average price, roughly equal to the average price, and 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 18 FEB	£340,000	£430,536	21% below HPI
2019 11 NOV	£259,000	£349,562	26% below HPI
2002 25 APR	£158,000	£153,157	3% above HPI
1998 14 OCT	£90,500	£92,584	2% below HPI
1997 18 AUG	£85,000	£84,600	Close to HPI
1995 20 JAN	£72,000	£70,240	3% above HPI

ROCK HOUSE 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 six ROCK HOUSE sales between January 1995 and February 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 2019 sale was for 26% below the HPI. So the extrapolation line tracks at 26% below the HPI over time, until the February 2025 sale, where it rises to 21% below the HPI. The line then continues to track at 21% below the HPI.

What might ROCK HOUSE be worth now?

ROCK HOUSE might now be worth an estimated £334,282.

This is based on house price deflation of 1.7%, between February 2025 and April 2026, 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 1.7% deflationary decrease is applied to the most recent sale price for ROCK HOUSE of £340,000 on 18th February 2025. For the value to have decreased from £340,000 to £334,282 over the ten months to April 2026, the following assumptions must hold true:

• The value of ROCK HOUSE has moved in line with the HPI for detached houses in the Cornwall local authority area.
• The February 2025 sale price of £340,000 represented a fair market value for the property.
• The size, condition, and specification of ROCK HOUSE has not materially changed since February 2025.

How Large is ROCK HOUSE?

ROCK HOUSE is 118m² according to the EPC inspection conducted in September 2015. This puts it in the largest 40% of detached houses houses in Rilla Mill, based on EPC data. The below chart shows the distribution of detached houses houses by size in Rilla Mill, and where ROCK HOUSE lies on this distribution: 60% of detached houses houses are smaller than ROCK HOUSE, and 40% of houses are larger. Note that EPC data is not available for all properties in Rilla Mill.

ROCK HOUSE: Plot and Title Map

ROCK HOUSE sits on a plot of roughly 0.081 of an acre, or 327m². The below map shows the location of ROCK HOUSE, 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 ROCK HOUSE). 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 ROCK HOUSE?

ROCK HOUSE is located in RILLA MILL, in the PL17 postcode district. The below map shows the position of ROCK HOUSE in RILLA MILL.