Flat 1, 25 Well Walk, London, NW3 1BY

Flat 1 is a three-bedroom semi-detached house in London (NW3 1BY). It has a recorded floor area of 137 m² (around 1475 sq ft), construction records dating it to before 1900 and council tax band G. At 137 m² this is the largest unit on EPC record across the building (83–137 m²). The building's EPC ratings span E to D, with this unit at the top. Period features are noted in the property record. The latest certificate (March 2020) shows a D (score 58), a step below the typical UK home. The rating has held steady at D across 2 certificates since October 2009. Between certificates, wall efficiency went from Very Poor to Poor and lighting went from Very Poor to Average. The recommended improvements would push it to C (score 71).

It hasn't traded since February 1999, a hold of 27 years that's notably long for the area. Across 1997–1999, sale prices on this property compounded at 3% per year. Today's modelled estimate of £1,820,000 sits 414.1% above the 1999 sale of £354,000. On a £-per-square-foot basis, the last sale (£240/sq ft) was about 72.9% below the postcode norm.