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.
MANSARD COTTAGE is a small extended detached house of 138m², built sometime between 1976 and 1982, which could now be worth an estimated £683,561. It was last sold for £710,000 in June 2023, which was around 90% above the average June 2023 detached price in the King's Lynn and West Norfolk local authority area. The most recent EPC inspection was November 2012, where the current energy rating was D, and the potential energy rating was B.
Land registry data shows two sales for MANSARD COTTAGE since 1st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the King's Lynn and West Norfolk local authority area for the corresponding sale date. Both of the two MANSARD COTTAGE 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 |
|---|---|---|---|
2023 9 JUN | £710,000 | £373,055 | 90% above HPI |
2013 28 OCT | £286,000 | £218,645 | 31% above HPI |
The below graph shows the average detached house price in the King's Lynn and West Norfolk local authority area over time, sourced from the HPI. The two MANSARD COTTAGE sales from October 2013 and June 2023 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 October 2013 sale was for 31% above the HPI. So the extrapolation line tracks at 31% above the HPI over time, until the June 2023 sale, where it rises to 90% above the HPI. The line then continues to track at 90% above the HPI.

MANSARD COTTAGE might now be worth an estimated £683,561.
This is based on house price deflation of 3.7%, between June 2023 and August 2025, for detached houses, in the King's Lynn and West Norfolk local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 3.7% deflationary decrease is applied to the most recent sale price for MANSARD COTTAGE of £710,000 on 9th June 2023. For the value to have decreased from £710,000 to £683,561 over the one year and ten months to August 2025, the following assumptions must hold true:
MANSARD COTTAGE is 138m², which includes one extension, according to the EPC inspection conducted in November 2012. This puts it in the smallest 40% of detached houses houses in Thornham, based on EPC data. The below chart shows the distribution of detached houses houses by size in Thornham, and where MANSARD COTTAGE lies on this distribution: 39% of detached houses houses are smaller than MANSARD COTTAGE, and 60% of houses are larger. Note that EPC data is not available for all properties in Thornham.

MANSARD COTTAGE sits on a plot of roughly 0.131 of an acre, or 529m². The below map shows the location of MANSARD COTTAGE, 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 MANSARD COTTAGE). 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.

MANSARD COTTAGE is located on PLOUGHMANS PIECE in THORNHAM, in the PE36 postcode district. The below map shows the position of MANSARD COTTAGE on PLOUGHMANS PIECE.

Most recent sales first: