Do I Need to Apply for a Building Permit for Additions to a Commercial Building?

Yes. All commercial projects that add square footage to an existing building require a building permit. The Building Safety Division can be contacted at 509-585-4561 for general information.

What Plans Do I Need to Provide to Have a Complete Submittal?

Generally, an application for a building permit includes:
(Note: Some plans or calculations may not always be necessary. You should contact the Building Safety Division for more specific information.)

• Plan review fee
• A completed Commercial Building Application (PDF)
• A completed Mechanical Application (PDF) (may be deferred)
• A completed Plumbing Application (PDF) (may be deferred)
• Building elevations
• A foundation plan
• A scaled floor plan (each floor)
• Floor ceiling assemblies
• Truss calculations (if applicable)
• Window and door schedule
• Sizes for headers, beams, girders, post and columns
• Cross-sections
• Stairway cross-section
• Washington State Nonresidential Energy Code Compliance
• Engineering and / or architectural stamped drawings (buildings >4,000 sq. ft.)
• One complete set of specifications (if applicable
• 3 sets of plans

When I Submit My Building Plans & Forms, Will I Need to Pay a Plan Review Fee?

A plan review fee is required at the time of submittal for all commercial projects. Please contact the Building Division at 509-585-4561 for the fee amount.

Where Do I Submit My Building Plans & Forms?

Building Safety Division
City Hall
210 W 6th Avenue
Kennewick, WA 99336