1 Boleyn Walk, Cardiff, CF23 5HR

1 Boleyn Walk is a two-bedroom detached house in Cardiff (CF23 5HR). It has a recorded floor area of 74 m² (around 797 sq ft), construction records dating it to 2007 onwards and council tax band F. The latest certificate (September 2020) shows a C (score 79), near the top of the C band. Earlier certificates rated it B (October 2008); the latest reading is one band lower. Between certificates, wall efficiency went from Good to Very Good and lighting went from Good to Very Good; while main heating dropped from Very Good to Good. At 74 m² this is the 4th smallest of 10 units on EPC record in the building, where floor areas span 69–134 m². The building's EPC ratings span E to B across 10 units on file.

Held since September 2009 — that's 17 years off the open market, well above the local norm. That sale fell during the post-crash dip, which often skews comparisons against later neighbouring sales. One planning record on file: an extension approved in 2010. Past consents include an extension, meaningful when judging how the property has evolved. Across 2004–2009, sale prices on this property compounded at 1.2% per year. Today's modelled estimate of £285,000 is 14% above the 2009 sale price. On a £-per-square-foot basis, the last sale (£314/sq ft) was about 26.6% above the typical sold price in the postcode. At 74 m² it's 26.7% smaller than the typical home in the postcode (101 m² median across 9 EPCs).