Mich. Comp. Laws § 560.109a: Parcel less than 1 acre.

Sec. 109a.

If a parcel resulting from a division is less than 1 acre in size, a building permit shall not be issued for the parcel unless the parcel has all of the following:

Public water or city, county, or district health department approval for the suitability of an on-site water supply under the same standards as set forth for lots under rules described in section 105(g).

Public sewer or city, county, or district health department approval for on-site sewage disposal under the health department standards as set forth for lots under rules described in section 105(g).

The municipality or county approving a proposed division resulting in a parcel less than 1 acre in size and its officers and employees are not liable if a building permit is not issued for the parcel for the reasons set forth in this section. A notice of approval of a proposed division resulting in a parcel of less than 1 acre in size shall include a statement to this effect.

A city, county, or district health department may adopt by regulation a fee for services provided under this section. The fees shall not exceed the reasonable costs of providing the services for which the fees are charged.