11a, Parkhouse Street, Southwark, London, SE5 7TQ

11a is a mid-terrace house in Southwark, London, London (SE5 7TQ). It has a recorded floor area of 89 m² (around 958 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (September 2021) shows a D (score 58), a step below the typical UK home. When first surveyed in September 2013 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Poor to Average and lighting went from Average to Very Good. The recommended improvements would push it to C (score 71). At 89 m² this is the 9th smallest of 11 units on EPC record in the building, where floor areas span 21–91 m². The building's EPC ratings span G to C across 11 units on file.

Untraded for 22 years, with the last transfer in January 2004. At 89 m² the property is well over the postcode median (66 m² across 10 EPCs), placing it in the larger end of the local stock. Across 1998–2004, sale prices on this property compounded at 16% per year. Today's modelled estimate of £518,000 sits 208.3% above the 2004 sale of £168,000. On a £-per-square-foot basis, the last sale (£175/sq ft) was about 57.8% below the postcode norm.