Baker House, Heritage listed building in Bacchus Marsh, Australia

Baker House is a residence in Bacchus Marsh featuring twelve cylindrical stone structures arranged around a central square building topped by a shallow pyramid roof and deep verandas. Water storage tanks are integrated within these cylinders as part of the functional design.

Drs Michael and Rosemary Baker bought the 129-hectare site near Bacchus Marsh for about A$4,000 after Michael took a mathematics lectureship at the University of Melbourne. Robin Boyd began the house in 1964 and completed it in 1966; the house and two other buildings were added to the Victorian Heritage Register on 10 May 2007.

The Bakers, both mathematicians, gave Boyd loose instructions; their love of geometry shaped the square plan he called "a plan of noughts and crosses". The house was later used for private functions, and the Dower House and a 1979 library by Sir Roy Grounds share the site.

The house stands in remnant bushland on the western outskirts of Melbourne, near Bacchus Marsh, and the 14-hectare site is not connected to mains water or electricity; rainwater is collected in the stone cylinders. It is a private property used for functions, so access is not open to the public and any visit must be arranged in advance. The house, Dower House and 1979 library by Roy Grounds were added to the Victorian Heritage Register on 10 May 2007.

The Bakers bought the 129-hectare site for about A$4,000, and Michael Baker chose it by drawing the perpendicular bisector between the University of Melbourne and Point Cook, then measuring out the maximum commuting distance. Long Forest, near Bacchus Marsh, was the first bush he reached.