Zoning regulations are hereby defined as regulations restricting the height, number of stories and size of buildings, the percentage of lots that may be occupied, the size of yards, courts and other open spaces, the density of population, the location and use of buildings, structures and land for trade, industry, residence, recreation or other purposes. For the purpose of such zoning regulations the unincorporated territory of the county may be divided into districts of such number, shape and area as may be deemed best suited to carry out the purpose of this act¹ and shall be shown upon the zoning plan; and within such district, the erection, construction, reconstruction, alteration or use of buildings, structures or land may be regulated and restricted. All such regulations shall be uniform for each class or kind of buildings or land uses throughout each district, but the regulations in one district may differ from those in other districts. The regulations shall be made in accordance with a comprehensive plan, and they shall give reasonable consideration, among other things, to the existing character of the district and its suitability for practical usage, while conserving the value of buildings and of existing development and encouraging the most appropriate use of land throughout the county.

In formulating the zoning regulations, a survey shall be made of the area to be zoned and information collected concerning the topography of the land, the types of uses to which land and buildings are currently put, the extent of development, the density of population, the public utilities currently available and transportation facilities, and other information pertinent to the formulation of such zoning regulations. In each district created by the zoning regulations there shall be specified a maximum height of buildings, the size of yards, courts and open spaces, the uses of land and buildings permitted and the intensity thereof, and parking requirements for vehicles. All of such requirements shall be reasonable in view of the information obtained in the survey in order that the benefits hereinbefore named shall be secured to the community as a whole.

The classification of the various uses of lands and buildings shall provide separate districts for single-family dwellings, two-family dwellings, multiple-family dwellings, commercial areas devoted to small shops or stores designed to serve limited residential areas, less restrictive business and industrial uses, and unrestricted uses. The regulation of yards and open spaces shall bear a relationship to the uses of lands and buildings which are permitted in the district. The height limitation and yard requirements of residential districts may be imposed upon a commercial district which is located immediately adjacent to a dwelling district. The parking requirement for vehicles shall bear reasonable relationship to the uses permitted in the district and the physical size and arrangement of streets.