This bill provides restrictions on municipal ordinance requirements related to minimum lot size in areas where water and sewer infrastructure are available and in areas where water and sewer infrastructure are not available but that are within designated growth areas. For a housing development served by a public, special district or other centrally managed water system and a public, special district or other comparable sewer system and that is located in an area in which dwelling units are allowed, a municipality must allow a dwelling unit on a lot with a minimum size of 5,000 square feet. For a housing development located in a designated growth area that is not served by a public, special district or other centrally managed water system and a public, special district or other comparable sewer system, that complies with minimum lot size requirements in accordance with the Maine Revised Statutes, Title 12, chapter 423-A and that is located in an area in which dwelling units are allowed, a municipality must allow a dwelling unit on a lot with a minimum size of 20,000 square feet. The bill also provides limits to ordinance provisions relating to lot coverage, road frontage and setback requirements.