4 Armstrong Court, Darlington, DL3 9LB

4 Armstrong Court is a one-bedroom semi-detached house in Darlington (DL3 9LB). It has a recorded floor area of 51 m² (around 549 sq ft), construction records dating it to 1983-1990 and council tax band A. At 51 m² this is the 5th smallest of 7 units on EPC record in the building, where floor areas span 40–59 m². The building's EPC ratings span E to D, with this unit at the top. On EPC score it ranks first in the building (68 versus a worst of 48). The latest certificate (June 2016) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (July 2010); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Good and main heating went from Poor to Average; while roof efficiency dropped from Good to Average. The recommended improvements would push it to C (score 77). Main heating runs on electricity. The latest certificate is from June 2016, so improvements made since then won't be reflected.

Across 1997–2012, sale prices on this property compounded at 8.3% per year. Today's modelled estimate of £100,000 sits 60% above the 2012 sale of £62,500. On a £-per-square-foot basis, the last sale (£114/sq ft) was about 15.5% below the postcode norm. 14 years since the last transfer (June 2012). Across the public record there are 4 sales, relatively high churn for a single property.