CONISTON, UNDY, CALDICOT, NP26 3EH - £630,000

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.

CONISTON is a very large extended detached house of 228m², built sometime between 1950 and 1966, which could now be worth an estimated £637,419. It was last sold for £630,000 in June 2026, which was around 28% above the average June 2026 detached price in the Monmouthshire local authority area. The most recent EPC inspection was March 2026, where the current energy rating was C, and the potential energy rating was B.

CONISTON Sold Prices

Land registry data shows three sales for CONISTON since 1^st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Monmouthshire local authority area for the corresponding sale date. Two of the three CONISTON sales were for above the average price, whilst one was for below 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
2026 24 JUN	£630,000	£492,846	28% above HPI
2017 20 DEC	£455,000	£349,273	30% above HPI
2011 8 MAR	£175,000	£272,934	36% below HPI

CONISTON Price Paid vs. HPI Average

The below graph shows the average detached house price in the Monmouthshire local authority area over time, sourced from the HPI. The three CONISTON sales between March 2011 and June 2026 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 2017 sale was for 30% above the HPI. So the extrapolation line tracks at 30% above the HPI over time, until the June 2026 sale, where it falls to 28% above the HPI. The line then continues to track at 28% above the HPI.

What might CONISTON be worth now?

CONISTON might now be worth an estimated £637,419.

This is based on house price inflation of 1.2%, between June 2026 and July 2026, for detached houses, in the Monmouthshire local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 1.2% inflationary increase is applied to the most recent sale price for CONISTON of £630,000 on 24th June 2026. For the value to have increased from £630,000 to £637,419 over the eleven months to July 2026, the following assumptions must hold true:

• The value of CONISTON has moved in line with the HPI for detached houses in the Monmouthshire local authority area.
• The June 2026 sale price of £630,000 represented a fair market value for the property.
• The size, condition, and specification of CONISTON has not materially changed since June 2026.

How Large is CONISTON?

CONISTON is 228m², which includes one extension, according to the EPC inspection conducted in March 2026. This puts it in the largest 10% of detached houses houses in Undy, based on EPC data. The below chart shows the distribution of detached houses houses by size in Undy, and where CONISTON lies on this distribution: 98% of detached houses houses are smaller than CONISTON, and 2% of houses are larger. Note that EPC data is not available for all properties in Undy.

CONISTON: Plot and Title Map

CONISTON sits on a plot of roughly 0.183 of an acre, or 741m². The below map shows the location of CONISTON, 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 CONISTON). 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 CONISTON?

CONISTON is located in UNDY, in the NP26 postcode district. The below map shows the position of CONISTON in UNDY.