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.
18 CHALKDOWN is a very large extended detached house of 163m², built sometime between 1983 and 1990, which could now be worth an estimated £731,522. It was last sold for £725,000 in October 2024, which was around 11% above the average October 2024 detached price in the Stevenage local authority area. The most recent EPC inspection was February 2016, where the current energy rating was D, and the potential energy rating was C.
Land registry data shows three sales for 18 CHALKDOWN since 1st January 1995. The below table shows the price paid for the three sales, along with the average detached price in the Stevenage local authority area for the corresponding sale date. The three 18 CHALKDOWN sales were a mix of above the average price, roughly equal to the average price, and 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 |
|---|---|---|---|
2024 29 OCT | £725,000 | £655,796 | 11% above HPI |
2016 31 MAR | £500,000 | £497,730 | Close to HPI |
2016 31 MAR | £495,000 | £497,730 | 1% below HPI |
18 CHALKDOWN might now be worth an estimated £731,522.
This is based on house price inflation of 0.9%, between October 2024 and April 2026, for detached houses, in the Stevenage local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 0.9% inflationary increase is applied to the most recent sale price for 18 CHALKDOWN of £725,000 on 29th October 2024. For the value to have increased from £725,000 to £731,522 over the two years and six months to April 2026, the following assumptions must hold true:
18 CHALKDOWN is 163m², which includes three extensions, according to the EPC inspection conducted in February 2016. This puts it in the largest 20% of detached houses in Stevenage, based on EPC data. The below chart shows the distribution of detached houses by size in Stevenage, and where 18 CHALKDOWN lies on this distribution: 84% of detached houses are smaller than 18 CHALKDOWN, and 15% of detached houses are larger. Note that EPC data is not available for all properties in Stevenage.

18 CHALKDOWN sits on a plot of roughly 0.126 of an acre, or 508m².
18 CHALKDOWN is located in STEVENAGE, in the SG2 postcode district.
Most recent sales first: