15 Biddestone Avenue, Coate, Swindon, SN3 6DE

15 Biddestone Avenue is a detached house in Coate, Swindon, Swindon (SN3 6DE). It has a recorded floor area of 99 m² (around 1066 sq ft) and construction records dating it to 2012 onwards. The latest certificate (May 2026) shows a C (score 73). Earlier certificates rated it B (April 2016); the latest reading is one band lower. Between certificates, window efficiency dropped from Very Good to Average and lighting dropped from Very Good to Average. The recommended improvements would push it to B (score 82). This certificate was lodged in the last six months, so the rating reflects current condition.

At 99 m² it sits well below the postcode median (163 m² across 31 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £442,000 is 25.9% above the 2016 sale price. On a £-per-square-foot basis, the last sale (£329/sq ft) was about 23.3% above the typical sold price in the postcode. Last sold in May 2016, so it's been off the market for around 10 years.