35a, Valentine Avenue, Southampton, SO19 0EQ

35a is a three-bedroom detached house in Southampton (SO19 0EQ). It has a recorded floor area of 77 m² (around 829 sq ft), construction records dating it to 1950-1966 and council tax band D. At 77 m² this is the 5th smallest of 9 units on EPC record in the building, where floor areas span 59–99 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (50 versus a best of 69). The latest certificate (October 2019) shows an E (score 50), well below the UK norm with real room to improve. Earlier certificates rated it D (November 2008); the latest reading is one band lower. Between certificates, hot-water efficiency went from Average to Good, lighting went from Average to Very Good and main heating went from Average to Good; while roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to D (score 57).

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Across 2001–2013, sale prices on this property compounded at 4% per year. Today's modelled estimate of £285,000 is 16.8% above the 2013 sale price. On a £-per-square-foot basis, the last sale (£294/sq ft) was about 59.7% above the typical sold price in the postcode. Last sold in March 2013, so it's been off the market for around 13 years.