Sacramento County Zoning Code § 404-10 Prohibition

No building, structure, vehicle or land in the RE-3 zone shall be used nor shall any building, structure or vehicle be erected, altered, moved, enlarged, or stored except as hereinafter specifically provided in this Article and subject to all the regulations and conditions enumerated in this Article and except as otherwise provided in this Code. Yard areas and other open spaces shall be used only for purposes specifically provided in this Article or for purposes clearly incidental and subordinate to the main purpose of the property; however, in no instance shall the yard areas and other open spaces be used so as to create problems inimical to the public health, safety, or general welfare or so as to have a detrimental effect on the use or value of property in the vicinity, in the RE-3 zone generally or within the County as a whole. Off-site signs are prohibited.