Flat 11, 23 Clarke Road, Northampton, NN1 4PL

Flat 11 is a mid-terrace house in Northampton (NN1 4PL). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1900-1929 and council tax band A. The latest certificate (August 2025) shows a D (score 66), on the cusp of jumping into the C band. Earlier certificates rated it C (November 2014); the latest reading is one band lower. Between certificates, roof efficiency went from Average to Good; while wall efficiency dropped from Good to Very Poor and window efficiency dropped from Average to Poor. The recommended improvements would push it to C (score 80). Main heating runs on electricity. At 59 m² this is the 9th 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 59 m² the property is well over the postcode median (34 m² across 72 EPCs), placing it in the larger end of the local stock. Most recent transfer was November 2025 at £122,500 — fresh data. Across 1998–2025, sale prices on this property compounded at 5.8% per year. On a £-per-square-foot basis, the last sale (£193/sq ft) was about 36% above the typical sold price in the postcode.