15 Columbine Close, Marton In Cleveland, Middlesbrough, TS7 8SQ

15 Columbine Close is a one-bedroom end-of-terrace house in Marton-In-Cleveland, Middlesbrough, Middlesbrough (TS7 8SQ). It has a recorded floor area of 31 m² (around 334 sq ft), construction records dating it to 1967-1975 and council tax band A. The latest certificate (October 2019) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since September 2009. Between certificates, hot-water efficiency went from Very Poor to Good, lighting went from Very Poor to Very Good and main heating went from Very Poor to Good; while wall efficiency dropped from Good to Poor and roof efficiency dropped from Good to Very Poor. At 31 m² this is the 2nd smallest of 37 units on EPC record in the building, where floor areas span 30–71 m². The building's EPC ratings span E to C across 37 units on file.

It hasn't traded since June 2008, a hold of 18 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 2006–2008, sale prices on this property compounded at -4.1% per year. Today's modelled estimate of £104,000 is 38.7% above the 2008 sale price. On a £-per-square-foot basis, the last sale (£225/sq ft) was about 87.8% above the typical sold price in the postcode. At 31 m² it's 20.5% smaller than the typical home in the postcode (39 m² median across 36 EPCs).