15 Mariner Avenue, Birmingham, B16 9DF

15 Mariner Avenue is a two-bedroom end-of-terrace house in Birmingham (B16 9DF). It has a recorded floor area of 57 m² (around 614 sq ft), construction records dating it to 1996-2002 and council tax band C. Tenure is freehold. The latest certificate (January 2020) shows an E (score 41), well below the UK norm with real room to improve. The rating has held steady at E across 3 certificates since November 2008. Between certificates, wall efficiency went from Average to Good, roof efficiency went from Poor to Good and window efficiency went from Very Poor to Average; while main heating dropped from Average to Very Poor. The recommended improvements would lift it to B (score 88), a 3-band jump. Main heating runs on electricity. Other recorded features include attached land beyond the plot. The home occupies a cul-de-sac position.

It hasn't traded since February 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. At 57 m² it sits well below the postcode median (101 m² across 24 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 £227,000 sits 305.4% above the 1998 sale of £56,000. On a £-per-square-foot basis, the last sale (£91/sq ft) was about 43.1% below the postcode norm.