4 St Johns Road, Watford, WD17 1PT

4 St Johns Road is a two-bedroom semi-detached house in Watford (WD17 1PT). It has a recorded floor area of 107 m² (around 1152 sq ft), construction records dating it to before 1900 and council tax band D. The latest certificate (September 2022) shows an F (score 36), near the bottom of the EPC scale. Earlier certificates rated it E (May 2017); the latest reading is one band lower. Between certificates, wall efficiency went from Very Poor to Good and roof efficiency went from Very Poor to Average; while hot-water efficiency dropped from Good to Very Poor and main heating dropped from Good to Very Poor. The recommended improvements would lift it to B (score 86), a 4-band jump. Main heating runs on to be used only when there is no heating/hot.

At 107 m² the property is well over the postcode median (45 m² across 22 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On the market in October 2017 and unlisted since — roughly 9 years. Across the public record there are 5 sales, relatively high churn for a single property. Across 1996–2017, sale prices on this property compounded at 9% per year. Today's modelled estimate of £489,000 is 15.1% above the 2017 sale price. One planning record on file: an extension refused in 2019.