13 Britannia Close, Northolt, UB5 6JY

13 Britannia Close is a one-bedroom mid-terrace house in Northolt (UB5 6JY). It has a recorded floor area of 30 m² (around 323 sq ft), construction records dating it to 1967-1975 and council tax band B. At 30 m² this is the smallest unit on EPC record across the building (30–124 m²). The building's EPC ratings span E to B across 54 units on file. The latest certificate (February 2022) shows a C (score 77), near the top of the C band. When first surveyed in April 2011 the rating was E, the property has climbed 2 bands since. Between certificates, hot-water efficiency went from Very Poor to Average, lighting went from Very Poor to Very Good and main heating went from Very Poor to Average; while wall efficiency dropped from Good to Poor. Main heating runs on electricity.

At 30 m² it sits well below the postcode median (82 m² across 53 EPCs), making it one of the more compact homes locally. Across 2000–2015, sale prices on this property compounded at 7.1% per year. Today's modelled estimate of £193,000 is 12.9% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£530/sq ft) was about 100.6% above the typical sold price in the postcode. On the market in January 2015 and unlisted since — roughly 11 years.