12 Duke Street, Aspley Guise, Milton Keynes, MK17 8EF

12 Duke Street is a two-bedroom semi-detached house in Aspley Guise, Milton Keynes, Milton Keynes (MK17 8EF). It has a recorded floor area of 46 m² (around 495 sq ft), construction records dating it to 1900-1929 and council tax band C. The latest certificate (March 2020) shows a D (score 60), on the cusp of jumping into the C band. When first surveyed in February 2010 the rating was E, the property has climbed 1 band since. Between certificates, hot-water efficiency went from Poor to Good, lighting went from Poor to Very Good and main heating went from Average to Good; while window efficiency dropped from Good to Average. The recommended improvements would lift it to B (score 88), a 2-band jump.

Untraded for 19 years, with the last transfer in June 2007. That sale landed at the peak of the pre-credit-crunch market, which is a useful reference point when interpreting the price. Across 1996–2007, sale prices on this property compounded at 10.5% per year. Today's modelled estimate of £309,000 sits 71.7% above the 2007 sale of £180,000. On a £-per-square-foot basis, the last sale (£364/sq ft) was about 28% above the typical sold price in the postcode. At 46 m² it sits well below the postcode median (71 m² across 11 EPCs), making it one of the more compact homes locally.