1 Ardentinny, Grosvenor Road, St Albans, AL1 3BZ

1 Ardentinny is a two-bedroom semi-detached house in St Albans (AL1 3BZ). It has a recorded floor area of 58 m² (around 625 sq ft), construction records dating it to 1967-1975 and council tax band C. At 58 m² this is the 7th smallest of 11 units on EPC record in the building, where floor areas span 49–65 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (March 2009) shows a C (score 71). The rating has held steady at C across 2 certificates since January 2009. Between certificates, window efficiency went from Average to Good and lighting went from Very Poor to Poor; while wall efficiency dropped from Average to Poor. The recommended improvements would push it to B (score 81). The latest certificate is from March 2009, so improvements made since then won't be reflected.

Held since February 1999 — that's 27 years off the open market, well above the local norm. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £331,000 sits 329.9% above the 1999 sale of £77,000. On a £-per-square-foot basis, the last sale (£123/sq ft) was about 68.5% below the postcode norm. One historical planning record sits against the property in 2007.