Heron House 1a, Flat 11, Cottage Grove, Surbiton, KT6 4JH

Heron House 1a is a one-bedroom mid-terrace house in Surbiton (KT6 4JH). It has a recorded floor area of 43 m² (around 463 sq ft) and construction records dating it to 1983-1990. At 43 m² this is the 2nd smallest of 10 units on EPC record in Heron House 1a, where floor areas span 42–83 m². The building's EPC ratings span E to C, with this unit at the top. The latest certificate (December 2023) shows a C (score 73). When first surveyed in November 2009 the rating was D, the property has climbed 1 band since. Between certificates, window efficiency went from Average to Good, hot-water efficiency went from Very Poor to Average and lighting went from Average to Very Good; while roof efficiency dropped from Good to Average. Main heating runs on electricity.

At 43 m² it sits well below the postcode median (77 m² across 46 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 83% of similar EPCs). Across 1996–2018, sale prices on this property compounded at 8.5% per year. On a £-per-square-foot basis, the last sale (£654/sq ft) was about 46.9% above the typical sold price in the postcode. 8 years since the last transfer (January 2018).