1, GREEN END, WELWYN, AL6 9QF - £500,000

Based on the January 2025 Price Paid Data (released on 3rd March 2025), the December 2024 House Price Index (released on 19th February 2025), and the January 2025 Energy Performance of Buildings Data (released on 27th February 2025). Sources

1 GREEN END is a small extended detached house of 138m², built sometime between 1983 and 1990, which could now be worth an estimated £818,197. It was last sold for £500,000 in March 2011, which was around 10% below the average March 2011 detached price in the Welwyn Hatfield local authority area. The most recent EPC inspection was November 2010, where the current energy rating was D, and the potential energy rating was C.

1 GREEN END Sold Prices

Land registry data shows two sales for 1 GREEN END since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Welwyn Hatfield local authority area for the corresponding sale date. Both of the two 1 GREEN END sales were 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
2011 31 MAR	£500,000	£552,637	10% below HPI
2006 30 DEC	£475,000	£481,079	1% below HPI

1 GREEN END Price Paid vs. HPI Average

The below graph shows the average detached house price in the Welwyn Hatfield local authority area over time, sourced from the HPI. The two 1 GREEN END sales from December 2006 and March 2011 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 2006 sale was for 1% below the HPI. So the extrapolation line tracks at 1% below the HPI over time, until the March 2011 sale, where it falls to 10% below the HPI. The line then continues to track at 10% below the HPI.

What might 1 GREEN END be worth now?

1 GREEN END might now be worth an estimated £818,197.

This is based on house price inflation of 63.6%, between March 2011 and December 2024, for detached 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 63.6% inflationary increase is applied to the most recent sale price for 1 GREEN END of £500,000 on 31st March 2011. For the value to have increased from £500,000 to £818,197 over the twelve years and three months to December 2024, the following assumptions must hold true:

• The value of 1 GREEN END has moved in line with the HPI for detached houses in the Welwyn Hatfield local authority area.
• The March 2011 sale price of £500,000 represented a fair market value for the property.
• The size, condition, and specification of 1 GREEN END has not materially changed since March 2011.

How Large is 1 GREEN END?

1 GREEN END is 138m², which includes one extension, according to the EPC inspection conducted in November 2010. This puts it in the smallest 40% of detached houses houses in Welwyn, based on EPC data. The below chart shows the distribution of detached houses houses by size in Welwyn, and where 1 GREEN END lies on this distribution: 40% of detached houses houses are smaller than 1 GREEN END, and 60% of houses are larger. Note that EPC data is not available for all properties in Welwyn.

1 GREEN END: Plot and Title Map

1 GREEN END sits on a plot of roughly 0.102 of an acre, or 412m². The below map shows the location of 1 GREEN END, 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 1 GREEN END). 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 1 GREEN END?

1 GREEN END is located in WELWYN, in the AL6 postcode district. The below map shows the position of No. 1 on GREEN END.