17a, Bywood Avenue, Croydon, CR0 7RB

17a is a one-bedroom mid-terrace house in Croydon (CR0 7RB). It has a recorded floor area of 37 m² (around 398 sq ft) and construction records dating it to 1900-1929. At 37 m² this is the smallest unit on EPC record across the building (37–97 m²). The building's EPC ratings span F to D, with this unit at the top. The latest certificate (August 2019) shows a D (score 58), a step below the typical UK home. Earlier certificates rated it C (January 2009); the latest reading is one band lower. Between certificates, lighting went from Average to Good; while roof efficiency dropped from Average to Very Poor and window efficiency dropped from Good to Average.

Held since May 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 37 m² it sits well below the postcode median (54 m² across 11 EPCs), making it one of the more compact homes locally. 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count. Today's modelled estimate of £243,000 is 33.5% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£457/sq ft) was about 55.8% above the typical sold price in the postcode.