21 Derwent House, Samuel Street, Preston, PR1 4YL

21 Derwent House is a two-bedroom end-of-terrace house in Preston (PR1 4YL). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1983-1990 and council tax band A. The latest certificate (January 2020) shows a C (score 73). When first surveyed in November 2009 the rating was F, the property has climbed 3 bands since. Between certificates, wall efficiency went from Poor to Very Good, roof efficiency went from Very Poor to Average and hot-water efficiency went from Poor to Good; while lighting dropped from Very Good to Average. Main heating runs on biomass. At 59 m² this is the 8th smallest of 18 units on EPC record in the building, where floor areas span 46–81 m². The building's EPC ratings span D to B across 18 units on file. Other recorded features include a balcony.

It hasn't traded since November 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 2002–2007, sale prices on this property compounded at 33% per year. Today's modelled estimate of £100,000 sits 100% above the 2007 sale of £50,000. On a £-per-square-foot basis, the last sale (£79/sq ft) was about 65.5% above the typical sold price in the postcode.