One part of a three-part investigation prepared for the Montgomery County Planning Board in Silver Spring, Maryland, this study addresses planning and site planning issues arising from the location of child care facilities in residential settings. The study, which emphasizes homes and centers which care for 7 to 20 children, provides a detailed analysis of the impact of child care facilities in residential zones. Section I establishes that Montgomery County had an increased number of working parents needing child care services and insufficient facilities to serve them. Zoning codes, development review criteria, and licensing practices of the Montgomery and Washington D.C. areas are analyzed in Section II. Section III summarizes results of a survey of 8 providers operating centers in their own homes and 3 offering care in centers not used as residences, 17 neighbors of providers, and 79 parents of enrolled children. Also conducted were parent transportation surveys and cost analyses derived from visual analyses of facilities. Section IV evaluates current site planning minimum requirements and proposes site planning guidelines to address issues such as signs, parking, landscaping, fences, barriers, play areas, and site development. Section V offers recommendations. Several site plan sketches are included and related materials, such as a glossary, extensive data tables, survey instruments, and county zoning ordinances, are appended. (RH)