1a, Allestree Drive, Grimsby, DN33 3DX

1a is a detached house in Grimsby (DN33 3DX). It has a recorded floor area of 237 m² (around 2551 sq ft), construction records dating it to 1967-1975 and council tax band E. The latest certificate (January 2013) returns a high B (score 85), putting the home a stone's throw from an A rating. When first surveyed in March 2011 the rating was E, the property has climbed 3 bands since. Between certificates, roof efficiency went from Poor to Very Good, hot-water efficiency went from Poor to Good and lighting went from Very Poor to Very Good; while window efficiency dropped from Average to Very Poor. The latest certificate is from January 2013, so improvements made since then won't be reflected.

At 237 m² the property is well over the postcode median (106 m² across 20 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the top 10% of properties in this postcode. Across 2004–2011, sale prices on this property compounded at 2% per year. Today's modelled estimate of £374,000 is 49.6% above the 2011 sale price. On a £-per-square-foot basis, the last sale (£98/sq ft) was about 32.2% below the postcode norm. Last sold in October 2011, so it's been off the market for around 15 years.