45 Henry Street, Northampton, NN1 4JD

45 Henry Street is an end-of-terrace house in Northampton (NN1 4JD). It has a recorded floor area of 41 m² (around 441 sq ft), construction records dating it to before 1900 and council tax band A. At 41 m² this is the smallest unit on EPC record across the building (41–110 m²). The building's EPC ratings span F to C, with this unit at the bottom. On EPC score it ranks last in the building (25 versus a best of 75). The latest certificate (April 2017) shows an F (score 25), near the bottom of the EPC scale. When first surveyed in May 2009 the rating was G, the property has climbed 1 band since. Between certificates, window efficiency dropped from Good to Average and lighting dropped from Very Good to Very Poor. The recommended improvements would lift it to C (score 76), a 3-band jump. Main heating runs on electricity.

Across 1996–2017, sale prices on this property compounded at 9.3% per year. Today's modelled estimate of £134,000 is 16.2% below the 2017 sale of £160,000, a rare downward gap that often correlates with deferred maintenance or unfinished works. On a £-per-square-foot basis, the last sale (£363/sq ft) was about 192.9% above the typical sold price in the postcode. At 41 m² it sits well below the postcode median (77 m² across 22 EPCs), making it one of the more compact homes locally. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. On the market in May 2017 and unlisted since — roughly 9 years. Across the public record there are 5 sales, relatively high churn for a single property.