Flat 4, 3 Elsworthy Terrace, London, NW3 3DR

Flat 4 is a mid-terrace house in London (NW3 3DR). It has a recorded floor area of 77 m² (around 829 sq ft), construction records dating it to 1900-1929 and council tax band F. At 77 m² this is the 3rd smallest of 4 units on EPC record in the building, where floor areas span 60–211 m². The building's EPC ratings span D to C, with this unit at the top. The latest certificate (September 2021) shows a C (score 73). The rating has held steady at C across 2 certificates since May 2009. Between certificates, lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Very Poor and hot-water efficiency dropped from Very Good to Good.

Held since November 2006 — that's 20 years off the open market, well above the local norm. Today's modelled estimate of £1,000,000 sits 95.1% above the 2006 sale of £512,500. On a £-per-square-foot basis, the last sale (£618/sq ft) was about 27.8% above the typical sold price in the postcode. Its energy rating outperforms most of the postcode (better than 78% of similar EPCs).