6 1 Sydenham House, Blackboy Road, Exeter, EX4 6SX

6 1 Sydenham House is a detached house in Exeter (EX4 6SX). It has a recorded floor area of 54 m² (around 581 sq ft) and construction records dating it to 1950-1966. The latest certificate (February 2025) shows an F (score 21), near the bottom of the EPC scale. When first surveyed in October 2010 the rating was G, the property has climbed 1 band since. Between certificates, window efficiency went from Poor to Average, hot-water efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good; while wall efficiency dropped from Poor to Very Poor. The recommended improvements would lift it to D (score 63), a 2-band jump. Main heating runs on electricity. At 54 m² this is the 5th smallest of 6 units on EPC record in the building, where floor areas span 50–54 m². The building's EPC ratings span F to C, with this unit at the bottom. On EPC score it ranks last in the building (21 versus a best of 69).

On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On the market in December 2017 and unlisted since — roughly 8 years. Today's modelled estimate of £152,000 is 16% above the 2017 sale price.