15b, Gladys Road, London, NW6 2PU

15b is a mid-terrace house in London (NW6 2PU). It has a recorded floor area of 125 m² (around 1345 sq ft) and construction records dating it to before 1900. At 125 m² this is the largest unit on EPC record across the building (41–125 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 (49 versus a best of 75). The latest certificate (September 2019) shows an E (score 49), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since July 2009. Between certificates, lighting went from Very Poor to Poor. The recommended improvements would lift it to C (score 78), a 2-band jump.

At 125 m² the property is well over the postcode median (92 m² across 33 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 88% of similar EPCs). Across 1997–2023, sale prices on this property compounded at 7% per year. On a £-per-square-foot basis, the last sale (£780/sq ft) was about 30.9% above the typical sold price in the postcode. Sold November 2023 for £1,050,000.