Flat 2, 35 Colwyn Road, Northampton, NN1 3PZ

Flat 2 is a one-bedroom semi-detached house in Northampton (NN1 3PZ). It has a recorded floor area of 27 m² (around 291 sq ft), construction records dating it to 1900-1929 and council tax band A. At 27 m² this is the smallest unit on EPC record across the building (27–74 m²). The building's EPC ratings span D to C, with this unit at the top. The latest certificate (January 2020) shows a C (score 70). When first surveyed in February 2009 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Average and lighting went from Good to Very Good.

Across 2003–2012, sale prices on this property compounded at -1.6% per year. Today's modelled estimate of £106,000 sits 101.9% above the 2012 sale of £52,500. On a £-per-square-foot basis, the last sale (£181/sq ft) was about 39.3% above the typical sold price in the postcode. At 27 m² it sits well below the postcode median (88 m² across 53 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 85% of similar EPCs). On the market in January 2012 and unlisted since — roughly 14 years.