Adding less than 3,000 square feet or a deck to an existing single family residence.
Examples of work covered by this (BR) permit include:
- Adding on to an existing house (new or replaced living space)
- Adding an attached garage or carport
- Adding detached buildings and structures, like garages, storage and equipment sheds, retaining walls greater than four feet in height
- Building a deck or deck with spa
- Repairing, expanding or constructing a dock, boat house, boat lift or bulkhead greater than four feet in height
- Constructing a swimming pool, bathing or hot tub (24 or more inches in depth and all in-ground)
This permit also includes:
- Clearing and grading
- Demolition work, if required
- Electrical (except temporary power)
- Mechanical (except fire protection)
Note: Additions greater than 3,000 gross square feet of new and/or replaced floor area require a single-family combo permit (BS).
Apply for this permit online through MyBuildingPermit.
The documents listed below are the minimum necessary to proceed with the application process. If you believe that a required submittal document does not apply to your project, please upload the Document Waiver Form in place of the required document. You may also print out a permit document list.
- Architectural Plan
- Boundary and Topographic Survey
- Construction Stormwater Pollution Prevention Plan (CSWPPP)
- for projects with less than 7,000 square feet of clearing and less than 100 yards of grading, a CSWPPP Short Form for Small Construction Projects may be submitted.
- Energy Code Sheet or Envelope Summary (Residential Energy Code Worksheet)
- Residential Site Plan
- Storm Drainage Report
- Stormwater Site Plan
- Structural and Lateral Calculations
- Structural Plan
- Value of Improvements Form
These items may be required during plan review, as determined by the scope of your project.
- Adult Family Home Requirements
- Critical Areas or Shoreline Land Use Permit
- Geotechnical Report
- King County Health Department Approval
- required for installation of septic tanks or if the dwelling is served by a septic system, and if there is a private well on the property. During review, submit your approval in the form of a letter or stamped plan from the King County Health Department.
- Pool/Spa Plan
- Title Report