121a, Hersham Road, Walton On Thames, KT12 1RN

121a is a three-bedroom end-of-terrace house in Walton On Thames (KT12 1RN). It has a recorded floor area of 120 m² (around 1292 sq ft), construction records dating it to 1930-1949 and council tax band D. At 120 m² this is the largest unit on EPC record across the building (46–120 m²). The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (42 versus a best of 76). Period features are noted in the property record. The latest certificate (March 2018) shows an E (score 42), well below the UK norm with real room to improve. When first surveyed in October 2008 the rating was F, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Very Good. The recommended improvements would lift it to C (score 69), a 2-band jump.

Held since July 2004 — that's 22 years off the open market, well above the local norm. At 120 m² the property is well over the postcode median (73 m² across 12 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). Across 1999–2004, sale prices on this property compounded at 8.5% per year. Today's modelled estimate of £401,000 sits 114.7% above the 2004 sale of £186,750. On a £-per-square-foot basis, the last sale (£145/sq ft) was about 37.7% below the postcode norm.