21 Basted Mill, Basted Lane, Borough Green, Sevenoaks, TN15 8LP

21 Basted Mill is a three-bedroom end-of-terrace house in Borough Green, Sevenoaks, Sevenoaks (TN15 8LP). It has a recorded floor area of 83 m² (around 893 sq ft), construction records dating it to 1996-2002 and council tax band E. The latest certificate (July 2025) shows a D (score 62), on the cusp of jumping into the C band. The recommended improvements would push it to C (score 76). Other recorded features include a conservatory.

Held since April 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 1998–2007, sale prices on this property compounded at 7.6% per year. Today's modelled estimate of £515,000 sits 61.4% above the 2007 sale of £319,000. On a £-per-square-foot basis, the last sale (£357/sq ft) was about 23.7% above the typical sold price in the postcode. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs).