13a, Market Street, Swindon, SN1 1RZ

13a is an end-of-terrace house in Swindon (SN1 1RZ). It has a recorded floor area of 109 m² (around 1173 sq ft), construction records dating it to 1930-1949 and council tax band A. At 109 m² this is the largest unit on EPC record across the building (32–109 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (49 versus a best of 78). The latest certificate (June 2019) shows an E (score 49), well below the UK norm with real room to improve. Earlier certificates rated it C (October 2008); the latest reading is 2 bands lower. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Poor to Very Good; while roof efficiency dropped from Very Good to Very Poor and window efficiency dropped from Good to Average. The recommended improvements would push it to D (score 66).

At 109 m² the property is well over the postcode median (49 m² across 3 EPCs), placing it in the larger end of the local stock. A recent sale: £215,000 in February 2025. Across 2000–2025, sale prices on this property compounded at 0.5% per year. Today's modelled estimate of £276,000 is 28.4% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£183/sq ft) was about 47.2% below the postcode norm.