(AREA) -- Field representatives with the U.S. Census Bureau will be contacting households in parts of southeast Michigan for the American Housing Survey. The Census says surveys are expected to be taken in May in Wayne, Oakland, Macomb, Monroe, St. Clair, Livingston and Lapeer counties. Advance letters already have been mailed to select addresses. Census representatives will follow up with those households by telephone or in person. The American Housing Survey lists information on the size and composition of housing inventory. Questions on the survey include the number of rooms, heating and cooling equipment, and the cost of the housing. Each survey takes about 45 minutes to complete.