Recommended cage sizes are
Small breeds weighing about 1kg
Single cage 380mm x 610mm x 460mm high
Breeding cage 610mm x 610mm x 460mm high
Medium sized breeds weighing up to 4kgs
Single cage 610mm x 610mm x 610mm
Breeding cage 610mm x 90mm x 610mm
Large breeds weighing over 4kgs
Single cage 900mm x 610mm x 610mm
Breeding cage 1200mm x 610mm x 610mm
Hutches may be built in teirs and can be kept inside or outside. If outside, then it should have an overhanging roof to give the rabbit protection. It should be placed on bricks or posts to prevent moisture rising in the wood and rotting it. Hutches should be secured to ensure they are not overturned in bad weather. The floors should be watertight, and unless a part wire floor is provided (with a metal tray), it is normal to supply absorbent bedding, usually wood shavings or straw.
It is advisable to have outdoor hutches covered in gauze mesh over the wire to keep out mosquitos which carry myxomatosis. Sheds should have screens on windows and doors.
Hutches must be draught and damp proof, admit ample fresh air and light and should be constructed to allow plenty of exercise and be easy to clean. They should not have any sharp edges which may be dangerous to the rabbit.
NOTE Rabbits are naturally solitary animals and you can only keep one rabbit per cage. Even rabbits which are reared together will eventually fight.
Please note: This information is provided by the Victorian Rabbit Association inc. and are their recommendations for keeping and housing rabbits in Australia.