12a, Collingbourne Road, Hammersmith And Fulham, London, W12 0JQ

12a is an end-of-terrace house in Hammersmith And Fulham, London, London (W12 0JQ). It has a recorded floor area of 36 m² (around 388 sq ft) and construction records dating it to 1900-1929. The latest certificate (July 2025) shows a C (score 73). The rating has held steady at C across 3 certificates since May 2015. Between certificates, wall efficiency dropped from Very Good to Poor and window efficiency dropped from Very Good to Poor. At 36 m² this is the 6th smallest of 63 units on EPC record in the building, where floor areas span 31–135 m². The building's EPC ratings span E to B across 63 units on file.

It hasn't traded since September 2005, a hold of 21 years that's notably long for the area. Across 2002–2005, sale prices on this property compounded at 9.7% per year. Today's modelled estimate of £572,000 sits 97.2% above the 2005 sale of £290,000. On a £-per-square-foot basis, the last sale (£748/sq ft) was about 96.5% above the typical sold price in the postcode. At 36 m² it sits well below the postcode median (72 m² across 62 EPCs), making it one of the more compact homes locally.