6 Sonata House, Lock Approach, Port Solent, Portsmouth, PO6 4UZ

6 Sonata House is a two-bedroom mid-terrace house in Port Solent, Portsmouth, Portsmouth (PO6 4UZ). It has a recorded floor area of 78 m² (around 840 sq ft), construction records dating it to 1996-2002 and council tax band F. At 78 m² this is the 7th smallest of 10 units on EPC record in the building, where floor areas span 70–93 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (November 2025) shows a D (score 68), on the cusp of jumping into the C band. Earlier certificates rated it C (October 2008); the latest reading is one band lower. Between certificates, roof efficiency went from Good to Very Good, lighting went from Very Poor to Poor and main heating went from Average to Good; while window efficiency dropped from Good to Poor and hot-water efficiency dropped from Poor to Very Poor. The recommended improvements would push it to C (score 70). Main heating runs on electricity. This certificate was lodged in the last six months, so the rating reflects current condition.

Across 2000–2016, sale prices on this property compounded at 1.7% per year. Today's modelled estimate of £371,000 is 19.7% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£369/sq ft) was about 19.2% above the typical sold price in the postcode. Last changed hands 10 years ago, in July 2016.