21a, Grimwade Street, Ipswich, IP4 1LS

21a is an end-of-terrace house in Ipswich (IP4 1LS). It has a recorded floor area of 21 m² (around 226 sq ft) and construction records dating it to 1900-1929. At 21 m² this is the smallest unit on EPC record across the building (21–112 m²). The building's EPC ratings span E to B, with this unit at the bottom. On EPC score it ranks last in the building (42 versus a best of 85). The latest certificate (November 2022) shows an E (score 42), well below the UK norm with real room to improve. When first surveyed in January 2022 the rating was F, the property has climbed 1 band since. Between certificates, roof efficiency went from Average to Good, window efficiency went from Poor to Average and lighting went from Average to Very Good. The recommended improvements would lift it to C (score 80), a 2-band jump. Main heating runs on electricity.

At 21 m² it sits well below the postcode median (70 m² across 14 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. Today's modelled estimate of £159,000 sits 54.4% above the 2025 sale of £103,000. On a £-per-square-foot basis, the last sale (£456/sq ft) was about 170.7% above the typical sold price in the postcode. Most recent transfer was June 2025 at £103,000 — fresh data. One historical planning record sits against the property in 2010.