11 Portland Place, Northampton, NN1 4DH

11 Portland Place is a three-bedroom semi-detached house in Northampton (NN1 4DH). It has a recorded floor area of 103 m² (around 1109 sq ft), construction records dating it to 2012 onwards and council tax band C. At 103 m² this is the 51st smallest of 61 units on EPC record in the building, where floor areas span 34–125 m². The building's EPC ratings span E to C, with this unit at the bottom. On EPC score it ranks last in the building (54 versus a best of 79). The latest certificate (November 2022) shows an E (score 54), well below the UK norm with real room to improve. Earlier certificates rated it D (May 2010); the latest reading is one band lower. Between certificates, wall efficiency went from Poor to Very Good and lighting went from Average to Very Good; while hot-water efficiency dropped from Average to Very Poor and main heating dropped from Average to Very Poor. The recommended improvements would lift it to C (score 75), a 2-band jump. Main heating runs on electricity.

Untraded for 29 years, with the last transfer in November 1997. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. At 103 m² the property is well over the postcode median (52 m² across 60 EPCs), placing it in the larger end of the local stock. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £219,000 sits 366% above the 1997 sale of £47,000. On a £-per-square-foot basis, the last sale (£42/sq ft) was about 61.2% below the postcode norm.