Bellevue Washington Single-Family Addition and Deck Permit Guide

Bellevue uses the single-family addition permit for additions under 3,000 square feet, decks, detached accessory structures, pools, and several related trade scopes.

Permit takeaway

Bellevue's single-family addition permit covers adding less than 3,000 square feet or a deck to an existing single-family residence.

Zoning and placement

Detached buildings, retaining walls over four feet, docks, bulkheads, pools, and grading may add site, shoreline, or land-use review depending on the property.

Building and trade review

The permit can include clearing and grading, demolition, electrical, mechanical, and plumbing work when those scopes are part of the addition project.

Call before applying when

Call before applying if the project exceeds 3,000 square feet, includes a deck with spa, retaining wall over four feet, dock, pool, or separate detached building.

Documents to prepare

• Single-family addition application
• Site plan
• Construction drawings
• Trade scope
• Clearing and grading information

Inspection planning

• Apply through MyBuildingPermit
• Upload required plans
• Complete plan review
• Schedule trade and building inspections
• Obtain final approval

Official sources

• Bellevue Single-Family Addition Permit
• Bellevue Residential Building Permits
• Bellevue Electrical Mechanical and Plumbing Permits

This guide is a planning summary. Always verify the current requirements with the local office before starting work.