21 Blyth Road, Hayes, UB3 1BY

21 Blyth Road is a seven-bedroom semi-detached house in Hayes (UB3 1BY). It has a recorded floor area of 48 m² (around 517 sq ft), construction records dating it to 1900-1929 and council tax band B. The latest certificate (April 2023) shows a C (score 76), near the top of the C band. When first surveyed in February 2009 the rating was D, the property has climbed 1 band since. Between certificates, wall efficiency went from Very Poor to Good, window efficiency went from Average to Good and lighting went from Poor to Very Good. At 48 m² this is the 4th smallest of 63 units on EPC record in the building, where floor areas span 24–180 m². The building's EPC ratings span G to B across 63 units on file.

At 48 m² it sits well below the postcode median (76 m² across 62 EPCs), making it one of the more compact homes locally. 7 bedrooms is on the larger side for this postcode, where 4 is the typical count. Sold October 2019 for £540,000. Across the public record there are 4 sales, relatively high churn for a single property. Across 2000–2019, sale prices on this property compounded at 8.3% per year. Today's modelled estimate of £646,000 is 19.6% above the 2019 sale price. On a £-per-square-foot basis, the last sale (£1,045/sq ft) was about 433.6% above the typical sold price in the postcode.