420a, Flat, Streatham High Road, Lambeth, London, SW16 3SN

420a is a two-bedroom end-of-terrace house in Lambeth, London, London (SW16 3SN). It has a recorded floor area of 55 m² (around 592 sq ft) and construction records dating it to 1900-1929. The latest certificate (August 2025) shows a D (score 68), on the cusp of jumping into the C band. When first surveyed in November 2008 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Poor. The recommended improvements would push it to C (score 74).

Held since August 2002 — that's 24 years off the open market, well above the local norm. 6 planning records sit against the property, 3 approved, 3 refused. Past consents include subdivision, an extension and partial demolition, meaningful when judging how the property has evolved. The record references conservation-area consent, which constrain future alterations. Today's modelled estimate of £484,000 is 48.9% above the 2002 sale price.