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

17 Derwent House is a three-bedroom end-of-terrace house in Preston (PR1 4YL). It has a recorded floor area of 80 m² (around 861 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (November 2019) shows a D (score 56), a step below the typical UK home. When first surveyed in October 2008 the rating was F, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Good, hot-water efficiency went from Average to Good and lighting went from Good to Very Good; while window efficiency dropped from Good to Average. At 80 m² this is the 14th smallest of 15 units on EPC record in the building, where floor areas span 46–81 m². The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (56 versus a best of 81). Our model identifies extension potential, subject to local planning policy.

Held since December 2002 — that's 23 years off the open market, well above the local norm. At 80 m² the property is well over the postcode median (61 m² across 24 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 88% of similar EPCs). Today's modelled estimate of £109,000 sits 560.6% above the 2002 sale of £16,500. On a £-per-square-foot basis, the last sale (£19/sq ft) was about 59.7% below the postcode norm.