12 The Old Saw Mill, Long Mill Lane, Platt, Sevenoaks, TN15 8QJ

12 The Old Saw Mill is a two-bedroom semi-detached house in Platt, Sevenoaks, Sevenoaks (TN15 8QJ). It has a recorded floor area of 117 m² (around 1259 sq ft), construction records dating it to 2003-2006 and council tax band F. The latest certificate (February 2020) returns a B (score 81), comfortably above the UK average. When first surveyed in June 2009 the rating was C, the property has climbed 1 band since. Between certificates, lighting went from Very Poor to Average; while hot-water efficiency dropped from Very Good to Good and main heating dropped from Very Good to Good. At 117 m² this is the 2nd smallest of 20 units on EPC record in the building, where floor areas span 114–361 m². The building's EPC ratings span D to B, with this unit at the top.

Held since March 2010 — that's 16 years off the open market, well above the local norm. At 117 m² it sits well below the postcode median (227 m² across 19 EPCs), making it one of the more compact homes locally. Its energy rating outperforms most of the postcode (better than 74% of similar EPCs). Today's modelled estimate of £461,000 is 19.7% above the 2010 sale price. On a £-per-square-foot basis, the last sale (£306/sq ft) was about 16.5% above the typical sold price in the postcode. One historical planning record sits against the property in 2020.