3a, Temple Parade, Netherlands Road, Barnet, EN5 1DN

3a is a five-bedroom mid-terrace house in Barnet (EN5 1DN). It has a recorded floor area of 47 m² (around 506 sq ft), construction records dating it to 1930-1949 and council tax band C. At 47 m² this is the 2nd smallest of 9 units on EPC record in the building, where floor areas span 28–104 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (39 versus a best of 71). The latest certificate (April 2018) shows an E (score 39), well below the UK norm with real room to improve. The rating has held steady at E across 5 certificates since June 2011. Between certificates, window efficiency went from Poor to Average and lighting went from Poor to Very Good; while roof efficiency dropped from Average to Very Poor and main heating dropped from Average to Very Poor. The recommended improvements would lift it to C (score 72), a 2-band jump. Main heating runs on electricity.

Across 2006–2011, sale prices on this property compounded at 4% per year. Today's modelled estimate of £376,000 sits 50.4% above the 2011 sale of £250,000. On a £-per-square-foot basis, the last sale (£494/sq ft) was about 125% above the typical sold price in the postcode. At 47 m² it sits well below the postcode median (73 m² across 8 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 88% of similar EPCs). On the market in August 2011 and unlisted since — roughly 15 years.