15 Maes Y Ffynnon, Bonvilston, Cardiff, CF5 6TT

15 Maes Y Ffynnon is a two-bedroom semi-detached house in Bonvilston, Cardiff, Cardiff (CF5 6TT). It has a recorded floor area of 60 m² (around 646 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (August 2014) shows a D (score 57), a step below the typical UK home. When first surveyed in October 2009 the rating was E, the property has climbed 1 band since. Between certificates, wall efficiency went from Poor to Good, window efficiency went from Poor to Average and hot-water efficiency went from Very Poor to Poor. The recommended improvements would push it to C (score 74). The latest certificate is from August 2014, so improvements made since then won't be reflected. At 60 m² this is the 4th smallest of 18 units on EPC record in the building, where floor areas span 59–143 m². The building's EPC ratings span E to C across 18 units on file. Other recorded features include a self-contained annexe.

At 60 m² it sits well below the postcode median (91 m² across 17 EPCs), making it one of the more compact homes locally. Most recent transfer: June 2022 at £190,000. Across the public record there are 5 sales, relatively high churn for a single property. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. Across 2006–2022, sale prices on this property compounded at 2.7% per year. Today's modelled estimate of £226,000 is 18.9% above the 2022 sale price. On a £-per-square-foot basis, the last sale (£294/sq ft) was about 46.3% above the typical sold price in the postcode.