12a, Callis Road, Waltham Forest, London, E17 8PN

12a is a mid-terrace house in Waltham Forest, London, London (E17 8PN). It has a recorded floor area of 49 m² (around 527 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (July 2019) shows a D (score 66), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since March 2018. Between certificates, roof efficiency went from Very Poor to Poor; while lighting dropped from Very Good to Very Poor. The recommended improvements would push it to C (score 73). At 49 m² this is the 14th smallest of 35 units on EPC record in the building, where floor areas span 38–78 m². The building's EPC ratings span F to C across 35 units on file.

Across 2020–2022, sale prices on this property compounded at 31.5% per year. On a £-per-square-foot basis, the last sale (£893/sq ft) was about 245.7% above the typical sold price in the postcode. Most recent transfer: February 2022 at £471,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.