Griffin House, Flat 13, Griffin Street, Newport, NP20 1GL

Griffin House is a mid-terrace house in Newport (NP20 1GL). It has a recorded floor area of 31 m² (around 334 sq ft), construction records dating it to 1930-1949 and council tax band A. The latest certificate (June 2015) shows a D (score 62), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since September 2009. Between certificates, wall efficiency went from Very Poor to Poor and window efficiency went from Very Poor to Poor; while hot-water efficiency dropped from Good to Very Poor. The recommended improvements would push it to C (score 69). The latest certificate is from June 2015, so improvements made since then won't be reflected. At 31 m² this is the 3rd smallest of 17 units on EPC record in Griffin House, where floor areas span 19–114 m². The building's EPC ratings span E to C across 17 units on file.

Today's modelled estimate of £116,000 is 39.6% below the 2019 sale of £192,000, an unusual pattern given regional price growth and worth checking against the EPC condition. On a £-per-square-foot basis, the last sale (£575/sq ft) was about 125.9% above the typical sold price in the postcode. At 31 m² it's 29.5% smaller than the typical home in the postcode (44 m² median across 32 EPCs). Sold August 2019 for £192,000.