This form is required for all residential building projects along with specific site and project data.
Site Plan
Draw site plan to scale, not less than 1-inch = 100-feet, show all property corners, existing and proposed structures, adjacent roads, all storage tank locations, all easements, well locations, emergency vehicle access, 2-foot contours, and north arrow. Many applicants incorporate the erosion, pollution, and stormwater control requirements of a site development permit into the site plan. This combined plan is sometimes referred to as an abbreviated plan or stormwater site plan.
Building Construction Drawings
Plans must be drawn to scale; preferred scale is 1/4" = 1'. Note dimensions on the plans. A complete set of drawings includes: foundation plan, framing plans, floor plans, cross sections, and elevations.
Engineering calculations are required whenever a structure doesn’t meet conventional light frame construction standards. Submit structural design drawings separately from architectural drawings. Both calculations and drawings must be stamped by a licensed professional engineer.
Site Development Permit
Projects that add 500 square feet or more of new impervious may require a site development permit to ensure that erosion, pollution, and stormwater runoff are controlled during and after construction.
This permit is required in the following situations: 1) A new driveway approach is being constructed that will connect to a public road; 2) The project will be using an existing driveway approach that was never permitted or built to County standards; 3) The applicant proposes to modify or rebuild an existing driveway approach.
Energy efficiency and ventilation calculations may be required, based on the International Energy Conservation Code of Washington State (IECC-WA) and Washington State Energy Code (WSEC).
Sewer work on residential property; single-family, duplexes, and accessory dwelling units, requires review by the County Public Works Department sewer division.
