12a, First Floor Flat, Norfolk Square, Brighton, BN1 2PB

12a is a mid-terrace house in Brighton (BN1 2PB). It has a recorded floor area of 34 m² (around 366 sq ft) and construction records dating it to before 1900. At 34 m² this is the smallest unit on EPC record across 12a (34–35 m²). On EPC score it ranks last in the building (74 versus a best of 77). The latest certificate (May 2021) shows a C (score 74). The rating has held steady at C across 2 certificates since December 2010. Between certificates, wall efficiency went from Very Poor to Poor; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good.

At 34 m² it sits well below the postcode median (49 m² across 50 EPCs), making it one of the more compact homes locally. Last changed hands 11 years ago, in March 2015. Across the public record there are 5 sales, relatively high churn for a single property. Across 1999–2015, sale prices on this property compounded at 9.4% per year. Today's modelled estimate of £226,000 is 13% above the 2015 sale price. On a £-per-square-foot basis, the last sale (£546/sq ft) was about 77.6% above the typical sold price in the postcode.