In 2002, Montana had an estimated 417,106 housing units, of which 357,296 were occupied; 70.2% were owner-occupied. About 68.9% of all units were single-family, detached homes; about 13% were mobile homes. Utility gas and electricity were the most common energy sources for heating. It was estimated that 11,057 units lacked telephone service, 2,653 lacked complete plumbing facilities, and 2,577 lacked complete kitchen facilities. The average household size was 2.48 people.
In 2002, 35,74 new privately owned units were authorized for construction. The median home value was $106,735. The median monthly cost for mortgage owners was $908. Renters paid a median of $478 per month. During 2002, Montana received over $16.7 million in community planning and development aid from the US Department of Housing and Urban Development.