Cedar House, Flat 7, 109 Thurlow Park Road, London, SE21 8JL

Cedar House is a one-bedroom semi-detached house in London (SE21 8JL). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 1900-1929 and council tax band C. At 37 m² this is the smallest unit on EPC record across Cedar House (37–62 m²). The building's EPC ratings span D to C, with this unit at the bottom. On EPC score it ranks last in the building (55 versus a best of 76). The latest certificate (August 2020) shows a D (score 55), a step below the typical UK home. Earlier certificates rated it C (April 2010); the latest reading is one band lower. Between certificates, window efficiency went from Very Poor to Poor and lighting went from Very Poor to Very Good; while wall efficiency dropped from Average to Very Poor and roof efficiency dropped from Poor to Very Poor.

It hasn't traded since September 2010, a hold of 16 years that's notably long for the area. Across the public record there are 5 sales, relatively high churn for a single property. Across 1997–2010, sale prices on this property compounded at 14.2% per year. Today's modelled estimate of £303,000 sits 56.2% above the 2010 sale of £194,000. On a £-per-square-foot basis, the last sale (£487/sq ft) was about 49.3% above the typical sold price in the postcode. At 37 m² it sits well below the postcode median (82 m² across 51 EPCs), making it one of the more compact homes locally. One planning record on file: new windows approved in 2025. Past consents include new windows, meaningful when judging how the property has evolved.