Flat, 43 High Street, Waltham, Grimsby, DN37 0LJ

Flat is a semi-detached house in Waltham, Grimsby, Grimsby (DN37 0LJ). It has a recorded floor area of 92 m² (around 990 sq ft), construction records dating it to 1950-1966 and council tax band A. The latest certificate (December 2018) shows a D (score 58), a step below the typical UK home. The rating has held steady at D across 2 certificates since January 2009. Between certificates, roof efficiency went from Poor to Average, hot-water efficiency went from Average to Good and lighting went from Good to Very Good; while wall efficiency dropped from Average to Poor. At 92 m² this is the 14th smallest of 15 units on EPC record in the building, where floor areas span 34–117 m². The building's EPC ratings span G to C across 15 units on file.

It hasn't traded since January 2001, a hold of 25 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 92 m² the property is well over the postcode median (51 m² across 14 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £157,000 sits 63.5% above the 2001 sale of £96,000. On a £-per-square-foot basis, the last sale (£97/sq ft) was about 42.7% below the postcode norm.