Emperor House, First Floor Flat, 12 Church Street, Rickmansworth, WD3 1BS

Emperor House is a mid-terrace house in Rickmansworth (WD3 1BS). It has a recorded floor area of 41 m² (around 441 sq ft), construction records dating it to before 1900 and council tax band D. At 41 m² this is the 6th smallest of 10 units on EPC record in Emperor House, where floor areas span 37–58 m². The building's EPC ratings span E to C, with this unit at the bottom. The latest certificate (October 2019) shows an E (score 50), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since February 2009. Between certificates, roof efficiency went from Poor to Good, hot-water efficiency went from Very Poor to Average and main heating went from Very Poor to Average; while wall efficiency dropped from Good to Poor and window efficiency dropped from Good to Average. Main heating runs on electricity.

Across 2020–2021, sale prices on this property compounded at -14.1% per year. Today's modelled estimate of £247,000 is 83% below the 2021 sale of £1,450,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£3,286/sq ft) was about 502.2% above the typical sold price in the postcode. It lags the bulk of the postcode on energy efficiency (less efficient than 85% of similar EPCs). Sold December 2021 for £1,450,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.