9 Bryn Onnen, Flint, CH6 5QB

9 Bryn Onnen is a three-bedroom semi-detached house in Flint (CH6 5QB). It has a recorded floor area of 88 m² (around 947 sq ft), construction records dating it to 1967-1975 and council tax band C. The latest certificate (March 2014) shows a D (score 57), a step below the typical UK home. Earlier certificates rated it C (June 2010); the latest reading is one band lower. Between certificates, hot-water efficiency went from Good to Very Good; while wall efficiency dropped from Good to Poor and roof efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 82), a 2-band jump. The latest certificate is from March 2014, so improvements made since then won't be reflected.

Held since May 2001 — that's 25 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. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £169,000 sits 248.5% above the 2001 sale of £48,500. On a £-per-square-foot basis, the last sale (£51/sq ft) was about 63.9% below the postcode norm.