25a, Basement Flat, Campbell Road, Brighton, BN1 4QD

25a is a mid-terrace house in Brighton (BN1 4QD). It has a recorded floor area of 43 m² (around 463 sq ft) and construction records dating it to before 1900. The latest certificate (August 2012) shows a G (score 15), near the bottom of the EPC scale. The recommended improvements would lift it to C (score 76), a 4-band jump. The latest certificate is from August 2012, so improvements made since then won't be reflected. At 43 m² this is the 10th smallest of 14 units on EPC record in the building, where floor areas span 27–49 m². The building's EPC ratings span G to C, with this unit at the bottom. On EPC score it ranks last in the building (15 versus a best of 72).

At 43 m² it's 15.7% smaller than the typical home in the postcode (51 m² median across 73 EPCs). On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £233,000 sits 65.5% above the 2012 sale of £140,790. On a £-per-square-foot basis, the last sale (£304/sq ft) was about 16.8% above the typical sold price in the postcode. On the market in December 2012 and unlisted since — roughly 13 years.