21 California Close, Colchester, CO4 9SG

21 California Close is a detached house in Colchester (CO4 9SG). It has a recorded floor area of 28 m² (around 301 sq ft), construction records dating it to 1996-2002 and council tax band A. The latest certificate (June 2021) shows a D (score 64), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since April 2010. Between certificates, main heating went from Poor to Average; while hot-water efficiency dropped from Average to Very Poor. Main heating runs on electricity. At 28 m² this is the 9th smallest of 56 units on EPC record in the building, where floor areas span 24–59 m². The building's EPC ratings span E to B across 56 units on file.

At 28 m² it sits well below the postcode median (41 m² across 55 EPCs), making it one of the more compact homes locally. Across 1999–2022, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £104,000 is 20.9% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£285/sq ft) was about 48.8% above the typical sold price in the postcode. Most recent transfer: January 2022 at £86,000. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend.