Flat 3, 23 Well Walk, London, NW3 1BY

Flat 3 is a two-bedroom end-of-terrace house in London (NW3 1BY). It has a recorded floor area of 102 m² (around 1098 sq ft), construction records dating it to 1900-1929 and council tax band D. At 102 m² this is the 2nd smallest of 4 units on EPC record in the building, where floor areas span 89–151 m². The building's EPC ratings span E to C, with this unit at the top. On EPC score it ranks first in the building (70 versus a worst of 47). The latest certificate (January 2020) shows a C (score 70). The rating has held steady at C across 2 certificates since May 2009. Between certificates, lighting went from Poor to Good; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good.

Across 1998–2017, sale prices on this property compounded at 7.4% per year. Today's modelled estimate of £1,085,000 is 11% below the 2017 sale of £1,219,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£1,110/sq ft) was about 50.3% above the typical sold price in the postcode. At 102 m² it's 25.5% smaller than the typical home in the postcode (137 m² median across 15 EPCs). Its energy rating outperforms most of the postcode (better than 80% of similar EPCs). Last changed hands 9 years ago, in September 2017.