143a, Putney High Street, Wandsworth, London, SW15 1SU

143a is a two-bedroom mid-terrace house in Wandsworth, London, London (SW15 1SU). It has a recorded floor area of 91 m² (around 980 sq ft) and construction records dating it to before 1900. The latest certificate (January 2024) shows an E (score 46), well below the UK norm with real room to improve. When first surveyed in November 2017 the rating was G, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor, roof efficiency went from Very Poor to Average and lighting went from Very Poor to Very Good. The recommended improvements would lift it to C (score 69), a 2-band jump. Main heating runs on electricity. At 91 m² this is the 16th smallest of 22 units on EPC record in the building, where floor areas span 18–110 m². The building's EPC ratings span E to B, with this unit at the bottom. On EPC score it ranks last in the building (46 versus a best of 82). Other recorded features include a balcony.

Held since October 1997 — that's 29 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £814,000 sits 139.4% above the 1997 sale of £340,000. On a £-per-square-foot basis, the last sale (£347/sq ft) was about 60.5% below the postcode norm.