16a, Allendale Road, Plymouth, PL4 6JA

16a is an end-of-terrace house in Plymouth (PL4 6JA). It has a recorded floor area of 25 m² (around 269 sq ft) and construction records dating it to 1900-1929. At 25 m² this is the smallest unit on EPC record across the building (25–220 m²). The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (October 2019) shows an E (score 53), well below the UK norm with real room to improve. Earlier certificates rated it C (January 2009); the latest reading is 2 bands lower. Between certificates, wall efficiency dropped from Average to Very Poor and roof efficiency dropped from Poor to Very Poor. The recommended improvements would push it to D (score 64).

Held since May 2004 — that's 22 years off the open market, well above the local norm. Across 2001–2004, sale prices on this property compounded at 24.8% per year. Today's modelled estimate of £134,000 sits 91.4% above the 2004 sale of £70,000. On a £-per-square-foot basis, the last sale (£260/sq ft) was about 142.3% above the typical sold price in the postcode. At 25 m² it sits well below the postcode median (88 m² across 17 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).