25b, Whittlebury Road, Silverstone, Towcester, NN12 8UN

25b is a five-bedroom detached house in Silverstone, Towcester, Towcester (NN12 8UN). It has a recorded floor area of 151 m² (around 1625 sq ft), construction records dating it to 1991-1995 and council tax band F. The latest certificate (January 2017) shows an E (score 52), well below the UK norm with real room to improve. The recommended improvements would push it to D (score 66). Main heating runs on oil. The home occupies a corner plot.

At 151 m² the property is well over the postcode median (65 m² across 26 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. Across 2000–2018, sale prices on this property compounded at 5.5% per year. Today's modelled estimate of £613,000 is 19% above the 2018 sale price. On a £-per-square-foot basis, the last sale (£317/sq ft) was about 31.3% above the typical sold price in the postcode. On the market in February 2018 and unlisted since — roughly 8 years.