1.  A governing body of a county whose population is 100,000 or more or a governing body of a city whose population is 150,000 or more shall adopt an ordinance for the zoning of tiny houses that:

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(a) Designates at least one zoning district in which a tiny house may be located and classified as an accessory dwelling unit;

(b) Designates at least one zoning district in which a tiny house may be located and classified as a single-family residential unit; and

(c) Designates at least one zoning district in which a tiny house may be located in a tiny house park.

2.  A governing body of a county whose population is less than 100,000 or a governing body of a city whose population is less than 150,000 shall adopt an ordinance for the zoning of tiny houses that:

(a) Designates at least one zoning district in which a tiny house may be located and classified as an accessory dwelling unit;

(b) Designates at least one zoning district in which a tiny house is allowed to be located and classified as a single-family residential unit; or

(c) Designates at least one zoning district in which a tiny house may be located in a tiny house park.

3.  Before adopting an ordinance pursuant to subsection 1 or 2, the governing body of a county or city must consider whether the locations of tiny houses in the designated zoning districts will have disproportionately high and adverse human health and environmental effects on minority populations and low-income populations.

4.  An ordinance adopted pursuant to subsection 1 or 2:

(a) May:

(1) Include any other requirements for tiny houses that the governing body determines is necessary; and

(2) Provide that a certificate of occupancy issued for a tiny house may limit the tiny house to use as a single-family residential unit or an accessory dwelling unit.

(b) Shall require that a tiny house that is:

(1) Located in:

(I) A zoning district designated pursuant to paragraph (a) of subsection 1 or paragraph (a) of subsection 2 is classified as an accessory dwelling unit on any building permit or zoning approval issued for the tiny house;

(II) A zoning district designated pursuant to paragraph (b) of subsection 1 or paragraph (b) of subsection 2 is classified as a single-family residential unit on any building permit or zoning approval issued for the tiny house; and

(III) A zoning district designated pursuant to paragraph (c) of subsection 1 or paragraph (c) of subsection 2 is classified as a tiny house on any building permit or zoning approval issued within the tiny house park.

(2) Not built on a permanent foundation may only be issued a certificate of occupancy for the tiny house that is tied to the specific parcel of land on which the tiny house is located. If the tiny house is moved from that parcel, the owner of the tiny house must obtain a new certificate of occupancy.

5.  An ordinance adopted pursuant to subsection 1 or 2 that allows for tiny houses to be located in tiny house parks must also establish requirements for tiny house parks, including, without limitation, requirements for:

(a) Community water and wastewater service;

(b) Adequate spacing between tiny houses in the tiny house park to allow for access for public safety services, including, without limitation, access for firefighting equipment and vehicles and utilities;

(c) Minimum size requirements for each space in the tiny house park for a tiny house;

(d) The minimum or maximum lot size of a tiny house park;

(e) Open space within the tiny house park; and

(f) Parking within the tiny house park.

6.  An ordinance adopted pursuant to subsection 1 or 2 must define ‘tiny house’ in accordance with the definition adopted in the International Residential Code by the International Code Council or its successor organization.