First Floor Flat, 1 Carlisle Road, London, N4 4NA

First Floor Flat is an end-of-terrace house in London (N4 4NA). It has a recorded floor area of 77 m² (around 829 sq ft) and construction records dating it to 1900-1929. The latest certificate (August 2017) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in October 2011 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor; while hot-water efficiency dropped from Good to Average and lighting dropped from Very Good to Good. The recommended improvements would push it to C (score 80).

It hasn't traded since March 2006, a hold of 20 years that's notably long for the area. Across 1997–2006, sale prices on this property compounded at 10.8% per year. Today's modelled estimate of £639,000 sits 137.8% above the 2006 sale of £268,750. On a £-per-square-foot basis, the last sale (£324/sq ft) was about 34.5% above the typical sold price in the postcode. At 77 m² it sits well below the postcode median (111 m² across 5 EPCs), making it one of the more compact homes locally.