11 Herons Close, Cambridge, CB1 8NS

11 Herons Close is a detached house in Cambridge (CB1 8NS). It has a recorded floor area of 168 m² (around 1808 sq ft), construction records dating it to 1950-1966 and council tax band F. The latest certificate (December 2020) shows a C (score 79), near the top of the C band. When first surveyed in March 2009 the rating was D, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Very Good, window efficiency went from Poor to Average and hot-water efficiency went from Good to Very Good; while wall efficiency dropped from Good to Average. The recommended improvements would push it to B (score 81).

Held since July 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. Across 1995–2009, sale prices on this property compounded at 9.4% per year. Today's modelled estimate of £1,013,000 sits 93% above the 2009 sale of £525,000. On a £-per-square-foot basis, the last sale (£290/sq ft) was about 42.6% below the postcode norm. At 168 m² it's 29.2% larger than the typical home in the postcode (130 m² median across 9 EPCs).