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.
9 GREAT LEY is a very small extended terraced house of 93m², built sometime between 1950 and 1966, which could now be worth an estimated £491,175. It was last sold for £250,000 in September 2009, which was around 25% above the average September 2009 terraced price in the Welwyn Hatfield local authority area. The most recent EPC inspection was June 2009, where the current energy rating was D, and the potential energy rating was D.
Land registry data shows four sales for 9 GREAT LEY since 1st January 1995. The below table shows the price paid for the four sales, along with the average terraced price in the Welwyn Hatfield local authority area for the corresponding sale date. Most of the four 9 GREAT LEY 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 |
|---|---|---|---|
2009 24 SEP | £250,000 | £199,716 | 25% above HPI |
2006 14 JUL | £250,000 | £200,722 | 25% above HPI |
1998 27 FEB | £92,500 | £81,206 | 14% above HPI |
1997 24 OCT | £77,500 | £81,220 | 5% below HPI |
The below graph shows the average terraced house price in the Welwyn Hatfield local authority area over time, sourced from the HPI. The four 9 GREAT LEY sales between October 1997 and September 2009 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 July 2006 sale was for 25% above the HPI. So the extrapolation line tracks at 25% above the HPI over time, until the September 2009 sale, which was also at 25% above the HPI.

9 GREAT LEY might now be worth an estimated £491,175.
This is based on house price inflation of 96.5%, between September 2009 and July 2025, for terraced houses, in the Welwyn Hatfield local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).
The 96.5% inflationary increase is applied to the most recent sale price for 9 GREAT LEY of £250,000 on 24th September 2009. For the value to have increased from £250,000 to £491,175 over the sixteen years and two months to July 2025, the following assumptions must hold true:
9 GREAT LEY is 93m², which includes one extension, according to the EPC inspection conducted in June 2009. This puts it in the smallest 20% of terraced houses houses in Welwyn Garden City, based on EPC data. The below chart shows the distribution of terraced houses houses by size in Welwyn Garden City, and where 9 GREAT LEY lies on this distribution: 17% of terraced houses houses are smaller than 9 GREAT LEY, and 83% of houses are larger. Note that EPC data is not available for all properties in Welwyn Garden City.

9 GREAT LEY sits on a plot of roughly 0.074 of an acre, or 300m². The below map shows the location of 9 GREAT LEY, 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 9 GREAT LEY). 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.

9 GREAT LEY is located in WELWYN GARDEN CITY, in the AL7 postcode district. The below map shows the position of No. 9 on GREAT LEY.

Most recent sales first: