15 Astra Court, Colin Road, Luton, LU2 7SG

15 Astra Court is a semi-detached house in Luton (LU2 7SG). It has a recorded floor area of 25 m² (around 269 sq ft), construction records dating it to 1976-1982 and council tax band A. The latest certificate (October 2019) shows an E (score 52), well below the UK norm with real room to improve. The rating has held steady at E across 2 certificates since June 2009. Between certificates, window efficiency went from Very Poor to Average, hot-water efficiency went from Very Poor to Poor and lighting went from Average to Good; while wall efficiency dropped from Good to Average and roof efficiency dropped from Good to Poor. The recommended improvements would lift it to C (score 79), a 2-band jump. Main heating runs on electricity. At 25 m² this is the 3rd smallest of 26 units on EPC record in the building, where floor areas span 23–43 m². The building's EPC ratings span F to C across 26 units on file.

Held since October 2001 — that's 25 years off the open market, well above the local norm. On energy efficiency it sits in the bottom 10% of properties in this postcode — significant headroom for improvement. Today's modelled estimate of £105,000 sits 228.1% above the 2001 sale of £32,000. On a £-per-square-foot basis, the last sale (£119/sq ft) was about 49% below the postcode norm.