3 Napier Street, Cambridge, CB1 1HR

3 Napier Street is a three-bedroom mid-terrace house in Cambridge (CB1 1HR). It has a recorded floor area of 61 m² (around 657 sq ft) and construction records dating it to before 1900. The latest certificate (August 2021) shows a D (score 65), on the cusp of jumping into the C band. The rating has held steady at D across 2 certificates since March 2009. Between certificates, lighting went from Very Poor to Very Good; while roof efficiency dropped from Average to Poor and window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 86), a 2-band jump.

Held since June 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 2007–2009, sale prices on this property compounded at 5.4% per year. Today's modelled estimate of £511,000 sits 104.4% above the 2009 sale of £250,000. On a £-per-square-foot basis, the last sale (£381/sq ft) was about 52.7% above the typical sold price in the postcode. 3 planning records sit against the property, 1 approved, 1 refused. Past consents include partial demolition, meaningful when judging how the property has evolved.