9 Rennie Walk, Darlington, DL1 1DU

9 Rennie Walk is a one-bedroom end-of-terrace house in Darlington (DL1 1DU). It has a recorded floor area of 44 m² (around 474 sq ft), construction records dating it to 1983-1990 and council tax band A. The latest certificate (February 2015) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2009); the latest reading is one band lower. Between certificates, hot-water efficiency went from Average to Good and lighting went from Poor to Average; while roof efficiency dropped from Good to Poor. The recommended improvements would lift it to B (score 89), a 2-band jump. The latest certificate is from February 2015, so improvements made since then won't be reflected. Our model identifies extension potential, subject to local planning policy.

It hasn't traded since January 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 1996–2007, sale prices on this property compounded at 7.8% per year. Today's modelled estimate of £110,000 sits 73.2% above the 2007 sale of £63,500. On a £-per-square-foot basis, the last sale (£134/sq ft) was about 72% above the typical sold price in the postcode. At 44 m² it's 26.6% smaller than the typical home in the postcode (60 m² median across 4 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 75% of similar EPCs).