21 Blair Close, Hemel Hempstead, HP2 7QJ

21 Blair Close is a one-bedroom end-of-terrace house in Hemel Hempstead (HP2 7QJ). It has a recorded floor area of 45 m² (around 484 sq ft), construction records dating it to 1967-1975 and council tax band B. The latest certificate (August 2014) shows an E (score 53), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since January 2013. Between certificates, hot-water efficiency dropped from Average to Poor. The recommended improvements would lift it to C (score 76), a 2-band jump. Main heating runs on electricity. The latest certificate is from August 2014, so improvements made since then won't be reflected. At 45 m² this is the 8th smallest of 29 units on EPC record in the building, where floor areas span 29–89 m². The building's EPC ratings span F to C across 29 units on file.

Across 2000–2014, sale prices on this property compounded at 3.9% per year. Today's modelled estimate of £153,000 sits 64.5% above the 2014 sale of £93,000. 12 years since the last transfer (April 2014). Across the public record there are 4 sales, relatively high churn for a single property. It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). 1 bedrooms is on the smaller side for this postcode, where 3 is the typical count.