173a, St Albans Road, Watford, WD24 5BD

173a is a one-bedroom mid-terrace house in Watford (WD24 5BD). It has a recorded floor area of 73 m² (around 786 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (May 2018) shows an E (score 47), well below the UK norm with real room to improve. Earlier certificates rated it C (February 2016); the latest reading is 2 bands lower. Between certificates, lighting went from Poor to Average; while wall efficiency dropped from Good to Very Poor and roof efficiency dropped from Good to Very Poor. The recommended improvements would lift it to C (score 69), a 2-band jump. At 73 m² this is the 13th smallest of 20 units on EPC record in the building, where floor areas span 30–104 m². The building's EPC ratings span G to B across 20 units on file. Period features are noted in the property record.

It hasn't traded since April 2007, a hold of 19 years that's notably long for the area. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. At 73 m² it's 17.7% larger than the typical home in the postcode (62 m² median across 19 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 74% of similar EPCs). Across 2005–2007, sale prices on this property compounded at 20.9% per year. Today's modelled estimate of £358,000 is 19.3% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£382/sq ft) was about 75.3% above the typical sold price in the postcode.