Clarendon House, Apartment 18, 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 1950-1966. 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, with this unit at the bottom. On EPC score it ranks last in the building (60 versus a best of 81). Other recorded features include a balcony. The latest certificate (December 2020) shows a D (score 60), on the cusp of jumping into the C band. The rating has held steady at D across 4 certificates since December 2008. Between certificates, hot-water efficiency went from Poor to Average and main heating went from Very Poor to Average; while wall efficiency dropped from Good to Poor and roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 80). Main heating runs on electricity.

Last sale on file: £94,000 in December 2020. Across the public record there are 4 sales, relatively high churn for a single property. At 47 m² it's 15.2% smaller than the typical home in the postcode (55 m² median across 21 EPCs). It lags the bulk of the postcode on energy efficiency (less efficient than 71% of similar EPCs). Across 2001–2020, sale prices on this property compounded at 2.5% per year. Today's modelled estimate of £111,000 is 18.1% above the 2020 sale price. On a £-per-square-foot basis, the last sale (£186/sq ft) was about 34.1% above the typical sold price in the postcode.