21 Castles Green, Newcastle Upon Tyne, NE12 6BU

21 Castles Green is a one-bedroom detached house in Newcastle Upon Tyne (NE12 6BU). It has a recorded floor area of 30 m² (around 323 sq ft), construction records dating it to 1967-1975 and council tax band A. At 30 m² this is the smallest unit on EPC record across the building (30–90 m²). The building's EPC ratings span F to C across 23 units on file. The latest certificate (September 2015) shows an E (score 53), well below the UK norm with real room to improve. The recommended improvements would lift it to C (score 75), a 2-band jump. Main heating runs on electricity. The latest certificate is from September 2015, so improvements made since then won't be reflected.

Across 1996–2015, sale prices on this property compounded at 5.8% per year. Today's modelled estimate of £98,000 sits 50.8% above the 2015 sale of £65,000. On a £-per-square-foot basis, the last sale (£201/sq ft) was about 71% above the typical sold price in the postcode. At 30 m² it sits well below the postcode median (49 m² across 22 EPCs), making it one of the more compact homes locally. 11 years since the last transfer (September 2015).