1 Benson House, Benson Street, Blackburn, BB1 5PP

1 Benson House is a detached house in Blackburn (BB1 5PP). It has a recorded floor area of 25 m² (around 269 sq ft), construction records dating it to 1900-1929 and council tax band A. At 25 m² this is the smallest unit on EPC record across the building (25–30 m²). On EPC score it ranks last in the building (72 versus a best of 74). The latest certificate (October 2021) shows a C (score 72). When first surveyed in December 2016 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good and lighting went from Good to Very Good; while hot-water efficiency dropped from Very Good to Very Poor and main heating dropped from Good to Very Poor. Main heating runs on electricity.

Across 2021–2021, sale prices on this property compounded at -39.8% per year. Today's modelled estimate of £136,000 is 69.8% below the 2021 sale of £450,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£1,672/sq ft) was about 2243.4% above the typical sold price in the postcode. At 25 m² it's 16.7% smaller than the typical home in the postcode (30 m² median across 17 EPCs). Most recent transfer: December 2021 at £450,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.