21 Elm Street, Blackburn, BB1 5NL
About 21 Elm Street
21 Elm Street is a semi-detached house in Blackburn (BB1 5NL). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (December 2025) shows a D (score 63), on the cusp of jumping into the C band. When first surveyed in November 2015 the rating was E, the property has climbed 1 band since. Between certificates, window efficiency went from Average to Good and lighting went from Average to Good. The recommended improvements would lift it to B (score 81), a 2-band jump. This certificate was lodged in the last six months, so the rating reflects current condition.
Across 1996–2021, sale prices on this property compounded at 5.7% per year. Today's modelled estimate of £128,000 sits 120.7% above the 2021 sale of £58,000. On a £-per-square-foot basis, the last sale (£73/sq ft) was about 27.7% above the typical sold price in the postcode. At 74 m² it's 17.3% smaller than the typical home in the postcode (90 m² median across 12 EPCs). Sold February 2021 for £58,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.
Everything you need to know about 21 Elm Street
The true value, the hidden risks and the full sale history, in one report.
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Energy performance
Recommended upgrades on file would lift this property by multiple EPC bands.
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls changed
High performance glazing installed
More low energy lighting installed
Get a survey for this property
Level 3 Building Survey
Because the property was built before 1919, we believe a Level 3 building survey should be considered.
From £820 · Includes VAT
Planning history
21 Elm Street has no planning applications on record.
A planning report still maps activity across the surrounding area and reads this property's extension & conversion potential.
Sales history & valuation
Sale price has grown by over 3x since 1996.
£128,000
Modelled from EPC, postcode comparables and a sale-price growth of 5.7% per year over 24 years.
£58,000
Growth on file: 5.7% per year over 24 years.
Sales timeline
5 February 2021Most recent
£58,000
+286.7%over 24 years18 September 1996
£15,000
Median price across the last 5 sales in BB1 5NL: £40,000 (2023–2017).
Versus other Elm Street homes
Floor Area for 21 Elm Street lags the street by a wide margin.
Price per m²
£784
Street avg £630
Floor Area
74 m²
Street avg 115 m²
Habitable Rooms
3 rooms
Street avg 5 rooms
CO₂ Emissions
3.6 t/year
Street avg 5.8 t/year
Everything you need to know about 21 Elm Street
The true value, the hidden risks and the full sale history, in one report.
Pick your report · every report is £14.99
One time fee only - money back guarantee

Similar properties nearby
The neighbourhood at a glance
Reported crime in the wider district is trending notably upward year-on-year.
Crime
3/mo
Rising year-on-year across the wider district.
Nearest stop
0.2 km
Seven Trees — bus stop.
Closest school
0.3 km
St Stephen's Church of England Primary School. 36 schools nearby.
Go deeper on the local area
A Local Area report breaks down crime, transport links, schools and air quality in depth.









