123a, St Marks Road, Enfield, EN1 1BJ

123a is a one-bedroom mid-terrace house in Enfield (EN1 1BJ). It has a recorded floor area of 95 m² (around 1023 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (March 2020) shows a D (score 56), a step below the typical UK home. The rating has held steady at D across 2 certificates since April 2009. Between certificates, window efficiency went from Average to Good and lighting went from Poor to Very Good. The recommended improvements would push it to C (score 71). At 95 m² this is the 36th smallest of 42 units on EPC record in the building, where floor areas span 35–138 m². The building's EPC ratings span E to C across 42 units on file.

Untraded for 30 years, with the last transfer in January 1996. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 95 m² the property is well over the postcode median (68 m² across 41 EPCs), placing it in the larger end of the local stock. Today's modelled estimate of £329,000 sits 558% above the 1996 sale of £50,000. On a £-per-square-foot basis, the last sale (£49/sq ft) was about 80% below the postcode norm.