17a, Swan Gardens, Tetsworth, Thame, OX9 7BN

17a is a detached house in Tetsworth, Thame, Thame (OX9 7BN). It has a recorded floor area of 143 m² (around 1539 sq ft), construction records dating it to 1991-1995 and council tax band G. The latest certificate (February 2016) shows an E (score 47), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since October 2015. Between certificates, wall efficiency went from Poor to Average; while hot-water efficiency dropped from Average to Poor and main heating dropped from Average to Poor. The recommended improvements would lift it to A (score 94), a 4-band jump. Main heating runs on oil. The latest certificate is from February 2016, so improvements made since then won't be reflected.

Untraded for 30 years, with the last transfer in May 1996. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £754,000 sits 290.7% above the 1996 sale of £193,000. On a £-per-square-foot basis, the last sale (£125/sq ft) was about 32.8% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 79% of similar EPCs).