20 Chalfont Walk, Norwich, NR4 7NH

20 Chalfont Walk is a mid-terrace house in Norwich (NR4 7NH). It has a recorded floor area of 59 m² (around 635 sq ft), construction records dating it to 1967-1975 and council tax band A. The latest certificate (April 2020) shows a D (score 57), a step below the typical UK home. Earlier certificates rated it C (February 2010); the latest reading is one band lower. Between certificates, main heating went from Average to Good; while wall efficiency dropped from Good to Average and roof efficiency dropped from Average to Very Poor. The recommended improvements would push it to C (score 77). At 59 m² this is the 6th smallest of 19 units on EPC record in the building, where floor areas span 45–90 m². The building's EPC ratings span E to C across 19 units on file.

It hasn't traded since September 1998, a hold of 28 years that's notably long for the area. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £147,000 sits 398.3% above the 1998 sale of £29,500. On a £-per-square-foot basis, the last sale (£46/sq ft) was about 70.5% below the postcode norm.