12a Hamburg House, Cross Street, Portsmouth, PO1 3GG

12a Hamburg House is a one-bedroom mid-terrace house in Portsmouth (PO1 3GG). It has a recorded floor area of 44 m² (around 474 sq ft), construction records dating it to 2003-2006 and council tax band B. The latest certificate (August 2020) returns a B (score 84), comfortably above the UK average. The rating has held steady at B across 2 certificates since April 2010. Between certificates, hot-water efficiency went from Poor to Average and lighting went from Very Poor to Very Good. Main heating runs on electricity. At 44 m² this is the 7th smallest of 34 units on EPC record in the building, where floor areas span 36–69 m². The building's EPC ratings span D to B, with this unit at the top. The property has solar panels on record, all of which lower running costs and tend to lift resale appeal. Other recorded features include a balcony.

Held since February 2011 — that's 15 years off the open market, well above the local norm. Across 2008–2011, sale prices on this property compounded at -9.1% per year. Today's modelled estimate of £147,000 is 30.1% above the 2011 sale price. On a £-per-square-foot basis, the last sale (£239/sq ft) was about 24.5% below the postcode norm. At 44 m² it's 27.9% smaller than the typical home in the postcode (61 m² median across 33 EPCs).