25 Blake House, Gunwharf Quays, Portsmouth, PO1 3TH

25 Blake House is a three-bedroom end-of-terrace house in Portsmouth (PO1 3TH). It has a recorded floor area of 125 m² (around 1345 sq ft), construction records dating it to 2003-2006 and council tax band F. The latest certificate (April 2026) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (June 2009); the latest reading is one band lower. Between certificates, lighting went from Average to Very Good; while window efficiency dropped from Good to Average and hot-water efficiency dropped from Poor to Very Poor. Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition. At 125 m² this is the 41st smallest of 43 units on EPC record in the building, where floor areas span 52–155 m². The building's EPC ratings span E to B across 43 units on file.

It hasn't traded since May 2010, a hold of 16 years that's notably long for the area. At 125 m² the property is well over the postcode median (94 m² across 42 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 74% of similar EPCs). Today's modelled estimate of £713,000 is 18.8% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£446/sq ft) was about 30.7% above the typical sold price in the postcode.