4 Grasmere Close, Watford, WD25 7JH

4 Grasmere Close is a one-bedroom mid-terrace house in Watford (WD25 7JH). It has a recorded floor area of 42 m² (around 452 sq ft), construction records dating it to 1996-2002 and council tax band C. The latest certificate (January 2021) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (February 2010); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while hot-water efficiency dropped from Average to Very Poor and main heating dropped from Poor to Very Poor. The recommended improvements would lift it to B (score 81), a 2-band jump. Main heating runs on electricity. At 42 m² this is the 11th smallest of 17 units on EPC record in the building, where floor areas span 35–49 m². The building's EPC ratings span E to C across 17 units on file.

Held since September 2004 — that's 22 years off the open market, well above the local norm. Across 2000–2004, sale prices on this property compounded at 15.6% per year. Today's modelled estimate of £210,000 sits 50.1% above the 2004 sale of £139,950. On a £-per-square-foot basis, the last sale (£310/sq ft) was about 22.1% above the typical sold price in the postcode.