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

18 Allison Bank is an end-of-terrace house in Norwich (NR1 1GW). It has a recorded floor area of 41 m² (around 441 sq ft), construction records dating it to 2007 onwards and council tax band A. The latest certificate (December 2019) shows a C (score 78), near the top of the C band. The rating has held steady at C across 2 certificates since December 2009. Between certificates, main heating went from Poor to Average; while hot-water efficiency dropped from Poor to Very Poor and lighting dropped from Poor to Very Poor. The recommended improvements would push it to B (score 82). Main heating runs on electricity. At 41 m² this is the 17th 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 across 74 units on file.

Held since November 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. Today's modelled estimate of £111,000 is 38.7% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£181/sq ft) was about 24.6% below the postcode norm. At 41 m² it's 29.3% smaller than the typical home in the postcode (58 m² median across 73 EPCs).