18a, Bromells Road, Lambeth, London, SW4 0BG

18a is a detached house in Lambeth, London, London (SW4 0BG). It has a recorded floor area of 37 m² (around 398 sq ft) and construction records dating it to 2022. At 37 m² this is the smallest unit on EPC record across the building (37–103 m²). The building's EPC ratings span D to B, with this unit at the bottom. On EPC score it ranks last in the building (61 versus a best of 87). The latest certificate (November 2022) shows a D (score 61), on the cusp of jumping into the C band. Main heating runs on electricity: electricity, unspecified tariff.

Sale prices here have outpaced London HPI: 16.1% per year against 0% for the wider region. Today's modelled estimate of £480,000 is 27.8% below the 2018 sale of £665,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£1,670/sq ft) was about 149% above the typical sold price in the postcode. At 37 m² it sits well below the postcode median (71 m² across 15 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On the market in March 2018 and unlisted since — roughly 8 years. Across the public record there are 4 sales, relatively high churn for a single property. 8 planning records sit against the property, 6 approved, 2 refused. Past consents include new windows and change of use to residential, meaningful when judging how the property has evolved.