31a, Copnor Road, Portsmouth, PO3 5AB

31a is a one-bedroom semi-detached house in Portsmouth (PO3 5AB). It has a recorded floor area of 32 m² (around 344 sq ft), construction records dating it to 1930-1949 and council tax band A. At 32 m² this is the smallest unit on EPC record across the building (32–194 m²). The building's EPC ratings span E to A across 48 units on file. The latest certificate (November 2017) shows a D (score 65), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 73).

Held since August 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 32 m² it sits well below the postcode median (69 m² across 47 EPCs), making it one of the more compact homes locally. Across 2007–2007, sale prices on this property compounded at -27.1% per year. Today's modelled estimate of £170,000 is 21.4% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£406/sq ft) was about 103.5% above the typical sold price in the postcode. One planning record on file: change of use to residential refused in 2007.