73b, Beaconsfield Avenue, Portsmouth, PO6 2PS

73b is a mid-terrace house in Portsmouth (PO6 2PS). It has a recorded floor area of 68 m² (around 732 sq ft) and construction records dating it to 1930-1949. The latest certificate (February 2020) shows an E (score 45), well below the UK norm with real room to improve. Earlier certificates rated it D (January 2010); the latest reading is one band lower. Between certificates, wall efficiency went from Poor to Average and lighting went from Good to Very Good; while roof efficiency dropped from Poor to Very Poor and hot-water efficiency dropped from Average to Poor. The recommended improvements would lift it to C (score 78), a 2-band jump. At 68 m² this is the 13th smallest of 32 units on EPC record in the building, where floor areas span 50–155 m². The building's EPC ratings span F to C across 32 units on file.

Untraded for 16 years, with the last transfer in February 2010. Across 2006–2010, sale prices on this property compounded at 0.8% per year. Today's modelled estimate of £170,000 sits 106.1% above the 2010 sale of £82,500. On a £-per-square-foot basis, the last sale (£113/sq ft) was about 45.7% below the postcode norm. It lags the bulk of the postcode on energy efficiency (less efficient than 84% of similar EPCs).