Flat 9, 23 Clarke Road, Northampton, NN1 4PL

Flat 9 is an end-of-terrace house in Northampton (NN1 4PL). It has a recorded floor area of 51 m² (around 549 sq ft) and construction records dating it to 1983-1990. The latest certificate (February 2017) shows an E (score 39), well below the UK norm with real room to improve. When first surveyed in May 2009 the rating was G, the property has climbed 2 bands since. Between certificates, wall efficiency went from Good to Very Good, roof efficiency went from Very Poor to Good and lighting went from Very Poor to Good. The recommended improvements would lift it to C (score 74), a 2-band jump. Main heating runs on electricity. At 51 m² this is the 6th smallest of 11 units on EPC record in the building, where floor areas span 32–61 m². The building's EPC ratings span F to B across 11 units on file.

At 51 m² the property is well over the postcode median (35 m² across 72 EPCs), placing it in the larger end of the local stock. It lags the bulk of the postcode on energy efficiency (less efficient than 83% of similar EPCs). Last sale on file: £104,000 in July 2021. Across the public record there are 4 sales, relatively high churn for a single property. That sale was during the post-pandemic price surge, when transactions cleared materially above pre-2020 trend. Across 2002–2021, sale prices on this property compounded at 2.2% per year. Today's modelled estimate of £124,000 is 19.2% above the 2021 sale price. On a £-per-square-foot basis, the last sale (£189/sq ft) was about 37.1% above the typical sold price in the postcode.