The Michigan Department of Licensing and Regulatory Affairs (LARA) has an updated, free, online Statewide Search for Subdivision Plats.
“This system provides access to digital images, with print capability, of the plats and related documents of land subdivisions in the State of Michigan’s plat files. The State of Michigan began maintaining a file of all plats in the state in 1873. A copy of all plats prepared after that date were filed with the State. Beginning in 1909 and completed in 1911, a copy of all plats on file with the 83 county Register of Deeds and recorded prior to 1873 were duplicated and the duplicate copies incorporated into the State’s files. This system includes all plats in the State of Michigan beginning with the plats created under the 1821 territorial act for recording town plats.”
“The related documents include court orders, municipal resolutions, municipal ordinances, surveyor’s affidavits, and county road commission’s resolutions. Generally these documents alter a plat on file in some way.”