ADDITIONS AND ALTERATIONS: Building plans and site plans require the same information as a new building. SNOWLOAD: Nevada County is a declared snow area.All Plans must show existing and proposed areas of work. •. Plans must be drawn with a non-erasable instrument. Pencil drawings are not permissible. 5. 1 – State of Nevada Approved Drawings are required for submittal. The following application form is provided for persons to submit a General Building Permit Application with Douglas County.