The R1 - One-Family Residence District is composed of certain quiet, low-density residential areas of the city, plus certain open areas where similar residential development appears likely to occur. The regulations for this district are designed to stabilize and protect the essential characteristics of the district, to promote and encourage a suitable environment for family life and to prohibit all activities of a commercial nature except home offices of doctors or ministers and certain home occupations controlled by specific limitations governing the size and extent of such nonresidential activities. To these ends, development is limited to a relatively low concentration, and permitted uses are limited basically to single-family dwellings, providing homes for the residents, plus certain additional uses such as schools, parks, churches and certain public facilities which serve the residents of the district.