21, WILLIAM STREET, BLACKPOOL, FY3 7BT - £101,500

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.

21 WILLIAM STREET is a very small extended detached house of 75m², built sometime between 1900 and 1929, which could now be worth an estimated £118,891. It was last sold for £101,500 in September 2007, which was around 50% below the average September 2007 detached price in the Blackpool local authority area. The most recent EPC inspection was August 2024, where the current energy rating was D, and the potential energy rating was C.

21 WILLIAM STREET Sold Prices

Land registry data shows two sales for 21 WILLIAM STREET since 1^st January 1995. The below table shows the price paid for the two sales, along with the average detached price in the Blackpool local authority area for the corresponding sale date. Both of the two 21 WILLIAM STREET 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
2007 3 SEP	£101,500	£201,202	50% below HPI
2004 27 APR	£69,000	£157,660	56% below HPI

21 WILLIAM STREET Price Paid vs. HPI Average

The below graph shows the average detached house price in the Blackpool local authority area over time, sourced from the HPI. The two 21 WILLIAM STREET sales from April 2004 and September 2007 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 April 2004 sale was for 56% below the HPI. So the extrapolation line tracks at 56% below the HPI over time, until the September 2007 sale, where it rises to 50% below the HPI. The line then continues to track at 50% below the HPI.

What might 21 WILLIAM STREET be worth now?

21 WILLIAM STREET might now be worth an estimated £118,891.

This is based on house price inflation of 17.1%, between September 2007 and March 2025, for detached houses, in the Blackpool local authority area, as calculated by the Office for National Statistics and published in their UK House Price Index (HPI).

The 17.1% inflationary increase is applied to the most recent sale price for 21 WILLIAM STREET of £101,500 on 3rd September 2007. For the value to have increased from £101,500 to £118,891 over the eighteen years and six months to March 2025, the following assumptions must hold true:

• The value of 21 WILLIAM STREET has moved in line with the HPI for detached houses in the Blackpool local authority area.
• The September 2007 sale price of £101,500 represented a fair market value for the property.
• The size, condition, and specification of 21 WILLIAM STREET has not materially changed since September 2007.

How Large is 21 WILLIAM STREET?

21 WILLIAM STREET is 75m², which includes one extension, according to the EPC inspection conducted in August 2024. This puts it in the smallest 10% of detached houses houses in Blackpool, based on EPC data. The below chart shows the distribution of detached houses houses by size in Blackpool, and where 21 WILLIAM STREET lies on this distribution: 9% of detached houses houses are smaller than 21 WILLIAM STREET, and 91% of houses are larger. Note that EPC data is not available for all properties in Blackpool.

21 WILLIAM STREET: Plot and Title Map

21 WILLIAM STREET sits on a plot of roughly 0.022 of an acre, or 89m². The below map shows the location of 21 WILLIAM STREET, 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 21 WILLIAM STREET). 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 21 WILLIAM STREET?

21 WILLIAM STREET is located in BLACKPOOL, in the FY3 postcode district. The below map shows the position of No. 21 on WILLIAM STREET.