28 Greenfields, South Marston, Swindon, SN3 4SQ

28 Greenfields is a two-bedroom semi-detached house in South Marston, Swindon, Swindon (SN3 4SQ). It has a recorded floor area of 66 m² (around 710 sq ft) and construction records dating it to 1950-1966. The latest certificate (November 2018) shows a D (score 63), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since June 2009. Between certificates, roof efficiency went from Average to Good, window efficiency went from Average to Good and lighting went from Average to Very Good; while main heating dropped from Very Good to Good. At 66 m² this is the 6th smallest of 20 units on EPC record in the building, where floor areas span 47–96 m². The building's EPC ratings span E to C across 20 units on file. Our model identifies extension potential, subject to local planning policy.

Held since November 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £147,000 sits 83.7% above the 2007 sale of £80,000. On a £-per-square-foot basis, the last sale (£113/sq ft) was about 30.3% below the postcode norm. At 66 m² it's 20.5% smaller than the typical home in the postcode (83 m² median across 19 EPCs).