21a, Croft Road, Swindon, SN1 4DG

21a is a one-bedroom end-of-terrace house in Swindon (SN1 4DG). It has a recorded floor area of 58 m² (around 624 sq ft) and construction records dating it to 1900-1929. The latest certificate (April 2019) shows a D (score 65), on the cusp of jumping into the C band. Earlier certificates rated it C (May 2009); the latest reading is one band lower. Between certificates, lighting went from Very Poor to Very Good; while wall efficiency dropped from Good to Very Poor. The recommended improvements would push it to C (score 80). At 58 m² this is the 6th smallest of 22 units on EPC record in the building, where floor areas span 31–494 m². The building's EPC ratings span G to C across 22 units on file. Period features are noted in the property record.

At 58 m² it sits well below the postcode median (164 m² across 21 EPCs), making it one of the more compact homes locally. Sold December 2020 for £132,000. Across the public record there are 5 sales, relatively high churn for a single property. Across 1997–2020, sale prices on this property compounded at 6.7% per year. On a £-per-square-foot basis, the last sale (£211/sq ft) was about 44.5% above the typical sold price in the postcode.