3a, Dukes Lane, Brighton, BN1 1BG

3a is a two-bedroom end-of-terrace house in Brighton (BN1 1BG). It has a recorded floor area of 67 m² (around 721 sq ft), construction records dating it to 1967-1975 and council tax band D. The latest certificate (March 2015) shows an E (score 48), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since April 2013. Between certificates, hot-water efficiency went from Poor to Average and lighting went from Good to Very Good. The recommended improvements would lift it to C (score 69), a 2-band jump. The latest certificate is from March 2015, so improvements made since then won't be reflected. Other recorded features include a basement.

Held since June 2008 — that's 18 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. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £407,000 sits 62.8% above the 2008 sale of £249,995. On a £-per-square-foot basis, the last sale (£347/sq ft) was about 45.1% above the typical sold price in the postcode.