Flat 1, 3 Crossfield Road, London, NW3 4NS

Flat 1 is an end-of-terrace house in London (NW3 4NS). It has a recorded floor area of 54 m² (around 581 sq ft) and construction records dating it to 1900-1929. At 54 m² this is the 2nd smallest of 5 units on EPC record in the building, where floor areas span 49–68 m². The building's EPC ratings span D to C, with this unit at the top. On EPC score it ranks first in the building (74 versus a worst of 55). The latest certificate (January 2022) shows a C (score 74). The rating has held steady at C across 10 certificates since October 2008. Between certificates, lighting went from Good to Very Good; while window efficiency dropped from Poor to Very Poor and hot-water efficiency dropped from Very Good to Good. The recommended improvements would push it to B (score 82).

Held since May 2011 — that's 15 years off the open market, well above the local norm. Across 1995–2011, sale prices on this property compounded at 9.5% per year. Today's modelled estimate of £740,000 is 23.3% above the 2011 sale price. On a £-per-square-foot basis, the last sale (£1,032/sq ft) was about 127.1% above the typical sold price in the postcode.