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

3 Derwent House is a three-bedroom detached house in Preston (PR1 4YL). It has a recorded floor area of 68 m² (around 732 sq ft), construction records dating it to 1950-1966 and council tax band A. At 68 m² this is the 14th 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, with this unit at the bottom. On EPC score it ranks last in the building (56 versus a best of 81). The latest certificate (May 2017) shows a D (score 56), a step below the typical UK home. Main heating runs on biomass.

Held since July 2008 — that's 18 years off the open market, well above the local norm. Across the public record there are 4 sales, relatively high churn for a single property. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 1996–2008, sale prices on this property compounded at 11.9% per year. Today's modelled estimate of £106,000 sits 71% above the 2008 sale of £62,000. On a £-per-square-foot basis, the last sale (£85/sq ft) was about 78% above the typical sold price in the postcode. It lags the bulk of the postcode on energy efficiency (less efficient than 82% of similar EPCs).