9b, Marlborough Road, London, N22 8NB

9b is a mid-terrace house in London (N22 8NB). It has a recorded floor area of 53 m² (around 570 sq ft) and construction records dating it to 1930-1949. At 53 m² this is the 13th smallest of 24 units on EPC record in the building, where floor areas span 22–112 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (January 2023) shows a C (score 71). When first surveyed in July 2009 the rating was D, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Good, lighting went from Very Poor to Very Good and main heating went from Average to Good.

It hasn't traded since December 2009, a hold of 16 years that's notably long for the area. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. Across 1997–2009, sale prices on this property compounded at 8.3% per year. Today's modelled estimate of £391,000 sits 96.5% above the 2009 sale of £199,000. On a £-per-square-foot basis, the last sale (£349/sq ft) was about 45.6% above the typical sold price in the postcode. Its energy rating outperforms most of the postcode (better than 74% of similar EPCs).