In 2002, Ohio had an estimated 4,875,496 housing units, 4,447,307 of which were occupied; 69.3% were owner-occupied. About 67.2% of all units were single-family, detached homes. About 24% of the housing units were built in 1939 or earlier; 44.6% were built between 1950 and 1979. In 2002, it was estimated that 145,923 units lacked telephone service, 18,220 lacked complete plumbing facilities, and 21,856 lacked complete kitchen facilities. Utility gas was the most common energy source for heating. About 585 units were equipped for solar energy. The average household size was 2.5 people.
In 2002, 51,246 new privately owned units were authorized for construction. The median home value was $113,072. The median monthly cost for mortgage owners was $1,028. Renters paid a median of $557 per month. During 2002, Ohio received over $257.2 million in community planning and development aid from the US Department of Housing and Urban Development.