3 The Boundary, Oldbrook, Milton Keynes, MK6 2RT

3 The Boundary is a one-bedroom detached house in Oldbrook, Milton Keynes, Milton Keynes (MK6 2RT). It has a recorded floor area of 56 m² (around 603 sq ft), construction records dating it to 1983-1990 and council tax band A. At 56 m² this is the largest unit on EPC record across the building (43–56 m²). The building's EPC ratings span D to C, with this unit at the top. On EPC score it ranks first in the building (79 versus a worst of 68). Other recorded features include a balcony. The latest certificate (November 2025) shows a C (score 79), near the top of the C band. The rating has held steady at C across 3 certificates since April 2010. Between certificates, hot-water efficiency went from Average to Good and main heating went from Average to Good; while window efficiency dropped from Average to Poor and lighting dropped from Very Good to Good.

Across 1998–2018, sale prices on this property compounded at 6.8% per year. Today's modelled estimate of £125,000 sits 138.1% above the 2018 sale of £52,500. On a £-per-square-foot basis, the last sale (£87/sq ft) was about 68.3% above the typical sold price in the postcode. At 56 m² it's 27.3% larger than the typical home in the postcode (44 m² median across 3 EPCs). 8 years since the last transfer (August 2018).