Flat 1, 12 Brunswick Close, Walton On Thames, KT12 3JJ

Flat 1 is a two-bedroom semi-detached house in Walton On Thames (KT12 3JJ). It has a recorded floor area of 61 m² (around 657 sq ft) and construction records dating it to 1960. The latest certificate (November 2023) returns a B (score 81), comfortably above the UK average. When first surveyed in April 2015 the rating was C, the property has climbed 1 band since. Between certificates, wall efficiency went from Average to Good, hot-water efficiency went from Good to Very Good and main heating went from Good to Very Good; while window efficiency dropped from Good to Average and lighting dropped from Very Good to Poor. At 61 m² this is the 2nd smallest of 3 units on EPC record in the building, where floor areas span 41–63 m². The building's EPC ratings span D to B, with this unit at the top. On EPC score it ranks first in the building (81 versus a worst of 62). Other recorded features include a balcony.

Its energy rating outperforms most of the postcode (better than 83% of similar EPCs). On a £-per-square-foot basis, the last sale (£503/sq ft) was about 58.1% above the typical sold price in the postcode. Last sale on file: £330,000 in January 2024.