Clarendon House, Apartment 14, 39 Bridge Street, Northampton, NN1 1NS

Clarendon House is a one-bedroom mid-terrace house in Northampton (NN1 1NS). It has a recorded floor area of 47 m² (around 506 sq ft) and construction records dating it to 1976-1982. The latest certificate (September 2018) shows a C (score 78), near the top of the C band. The rating has held steady at C across 2 certificates since October 2008. Between certificates, wall efficiency dropped from Good to Average and window efficiency dropped from Good to Average. The recommended improvements would push it to B (score 88). Main heating runs on electricity. At 47 m² this is the 3rd smallest of 19 units on EPC record in Clarendon House, where floor areas span 46–64 m². The building's EPC ratings span D to B across 19 units on file.

Held since April 2007 — that's 19 years off the open market, well above the local norm. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Today's modelled estimate of £105,000 is 20.7% above the 2007 sale price. On a £-per-square-foot basis, the last sale (£172/sq ft) was about 25.2% above the typical sold price in the postcode. At 47 m² it's 15.2% smaller than the typical home in the postcode (55 m² median across 21 EPCs).