Flat 1, 3 Eccleston Square, London, SW1V 1NP

Flat 1 is a one-bedroom semi-detached house in London (SW1V 1NP). It has a recorded floor area of 54 m² (around 581 sq ft), construction records dating it to 1900-1929 and council tax band F. At 54 m² this is the largest unit on EPC record across the building (37–54 m²). The building's EPC ratings span D to C, with this unit at the bottom. Period features are noted in the property record. The latest certificate (June 2015) shows a D (score 64), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since March 2009. Between certificates, window efficiency went from Very Poor to Poor and lighting went from Very Poor to Good. The recommended improvements would push it to C (score 80). The latest certificate is from June 2015, so improvements made since then won't be reflected.

It hasn't traded since May 1999, a hold of 27 years that's notably long for the area. Across 1998–1999, sale prices on this property compounded at -30% per year. Today's modelled estimate of £574,000 sits 485.7% above the 1999 sale of £98,000. On a £-per-square-foot basis, the last sale (£169/sq ft) was about 79.9% below the postcode norm.