27 Harmer Green Lane, Welwyn, AL6 0AS

27 Harmer Green Lane is a five-bedroom detached house in Welwyn (AL6 0AS). It has a recorded floor area of 275 m² (around 2960 sq ft), construction records dating it to 1950-1966 and council tax band G. The latest certificate (February 2015) returns a B (score 82), comfortably above the UK average. When first surveyed in July 2011 the rating was E, the property has climbed 3 bands since. Between certificates, wall efficiency went from Poor to Very Good, roof efficiency went from Average to Good and window efficiency went from Good to Very Good. The latest certificate is from February 2015, so improvements made since then won't be reflected. Other recorded features include a balcony, a conservatory and attached land beyond the plot.

At 275 m² the property is well over the postcode median (183 m² across 7 EPCs), placing it in the larger end of the local stock. Its energy rating outperforms most of the postcode (better than 86% of similar EPCs). Today's modelled estimate of £1,546,000 sits 99.2% above the 2011 sale of £776,000. On a £-per-square-foot basis, the last sale (£262/sq ft) was about 17.3% below the postcode norm. On the market in October 2011 and unlisted since — roughly 15 years. 4 planning records sit against the property, 3 approved, 1 refused.