233a, High Road, Loughton, IG10 1AD

233a is a one-bedroom detached house in Loughton (IG10 1AD). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (June 2017) shows an E (score 50), well below the UK norm with real room to improve. When first surveyed in June 2009 the rating was G, the property has climbed 2 bands since. Between certificates, roof efficiency went from Very Poor to Good, window efficiency went from Very Poor to Good and hot-water efficiency went from Average to Good; while wall efficiency dropped from Poor to Very Poor and lighting dropped from Very Good to Poor. The recommended improvements would lift it to C (score 70), a 2-band jump. At 48 m² this is the 3rd smallest of 11 units on EPC record in the building, where floor areas span 30–96 m². The building's EPC ratings span E to C, with this unit at the bottom.

Held since October 2001 — that's 25 years off the open market, well above the local norm. At 48 m² it sits well below the postcode median (80 m² across 10 EPCs), making it one of the more compact homes locally. It lags the bulk of the postcode on energy efficiency (less efficient than 80% of similar EPCs). 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. Today's modelled estimate of £603,000 is 31.1% above the 2001 sale price.