20 Hayes Apartments, The Hayes, Cardiff, CF10 1AQ

20 Hayes Apartments is a one-bedroom mid-terrace house in Cardiff (CF10 1AQ). It has a recorded floor area of 37 m² (around 398 sq ft), construction records dating it to 2012 onwards and council tax band E. At 37 m² this is the smallest unit on EPC record across the building (37–91 m²). The building's EPC ratings span D to B, with this unit at the top. Other recorded features include a balcony. Period features are noted in the property record. The latest certificate (June 2022) returns a high B (score 85), putting the home a stone's throw from an A rating. The rating has held steady at B across 2 certificates since January 2011. Between certificates, window efficiency dropped from Very Good to Good and hot-water efficiency dropped from Very Good to Good. Main heating runs on electricity.

At 37 m² it sits well below the postcode median (53 m² across 48 EPCs), making it one of the more compact homes locally. Across 2010–2016, sale prices on this property compounded at 8.3% per year. On a £-per-square-foot basis, the last sale (£439/sq ft) was about 68.4% above the typical sold price in the postcode. Last changed hands 10 years ago, in July 2016.