28a, Upper High Street, Worthing, BN11 1DL

28a is a mid-terrace house in Worthing (BN11 1DL). It has a recorded floor area of 36 m² (around 388 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (December 2020) shows an E (score 52), well below the UK norm with real room to improve. When first surveyed in September 2009 the rating was F, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor, lighting went from Poor to Very Good and main heating went from Poor to Average; while window efficiency dropped from Good to Average. The recommended improvements would lift it to C (score 73), a 2-band jump. Main heating runs on electricity. At 36 m² this is the 2nd smallest of 29 units on EPC record in the building, where floor areas span 29–142 m². The building's EPC ratings span F to B across 29 units on file.

Held since June 2007 — that's 19 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. At 36 m² it sits well below the postcode median (82 m² across 28 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Across 1997–2007, sale prices on this property compounded at 14.1% per year. Today's modelled estimate of £168,000 is 20% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£361/sq ft) was about 78% above the typical sold price in the postcode.