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.
1 BLACKDOWN CLOSE is a semi-detached house, which could now be worth an estimated £502,468. It was last sold for £133,000 in February 2001, which was around 5% above the average February 2001 semi-detached price in the North Hertfordshire local authority area.
Land registry data shows one sale for 1 BLACKDOWN CLOSE since 1st January 1995. The below table shows the price paid for the one sale, along with the average semi-detached price in the North Hertfordshire local authority area for the corresponding sale date. The average price is sourced from the Office for National Statistics' House Price Index (HPI).
| Date | Price | HPI Price | Variation from HPI |
|---|---|---|---|
2001 22 FEB | £133,000 | £126,876 | 5% above HPI |
1 BLACKDOWN CLOSE might now be worth an estimated £502,468.
This is based on house price inflation of 277.8%, between February 2001 and May 2026, for semi-detached houses, in the North Hertfordshire local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 277.8% inflationary increase is applied to the most recent sale price for 1 BLACKDOWN CLOSE of £133,000 on 22nd February 2001. For the value to have increased from £133,000 to £502,468 over the 24 years and nine months to May 2026, the following assumptions must hold true:
1 BLACKDOWN CLOSE is located in STEVENAGE, in the SG1 postcode district.
Most recent sales first: