27 Allison Bank, Geoffrey Watling Way, Norwich, NR1 1GW

27 Allison Bank is an end-of-terrace house in Norwich (NR1 1GW). It has a recorded floor area of 52 m² (around 560 sq ft), construction records dating it to 2007 onwards and council tax band A. At 52 m² this is the 24th smallest of 74 units on EPC record in the building, where floor areas span 32–232 m². The building's EPC ratings span D to B, with this unit at the bottom. The latest certificate (April 2018) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (April 2018); the latest reading is one band lower. Main heating runs on electricity.

Held since October 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £102,000 is 45.7% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£125/sq ft) was about 47.9% below the postcode norm.