1a, Derwent Drive, Humberston, Grimsby, DN36 4BB

1a is a one-bedroom semi-detached house in Humberston, Grimsby, Grimsby (DN36 4BB). It has a recorded floor area of 60 m² (around 646 sq ft), construction records dating it to 2003-2006 and council tax band A. Tenure is freehold. At 60 m² this is the 2nd smallest of 25 units on EPC record in the building, where floor areas span 24–123 m². The building's EPC ratings span F to C, with this unit at the top. On EPC score it ranks first in the building (79 versus a worst of 36). The latest certificate (October 2025) shows a C (score 79), near the top of the C band. When first surveyed in August 2012 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Good and lighting went from Average to Good; while window efficiency dropped from Good to Average.

At 60 m² it's 21.6% smaller than the typical home in the postcode (77 m² median across 24 EPCs). Its energy rating outperforms most of the postcode (better than 79% of similar EPCs). 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. Across 1999–2016, sale prices on this property compounded at 5.7% per year. Today's modelled estimate of £112,000 is 28.7% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£135/sq ft) was about 25.2% below the postcode norm. On the market in November 2016 and unlisted since — roughly 10 years.