Concrete Patio Cost in Seattle 2026

What concrete patio includes in Seattle

Installation of a poured concrete patio with excavation, a compacted base, forms, reinforcement, and a broom or smooth finish. Includes control joints and curing.

Typical time on site: 2 to 3 days. Local labor rate: $34/hour for an experienced concrete pro.

What changes the price of concrete patio in Seattle

• Patio square footage
• Finish type
• Base and excavation
• Reinforcement added
• Site access

A concrete patio quote priced off statewide averages will be off by 10 to 20 percent for Seattle, because the metro has its own labor pool, material delivery distances, and permit timelines.

Seattle climate and demand for concrete

Mild winters with persistent rain (moss/moisture on roofs); rare snow loads; minimal AC historically but warming trend

Seattle permits for concrete patio

Building department: Seattle Department of Construction and Inspections (SDCI). https://www.seattle.gov/sdci

Typical permit cost: $400 - $5,000 residential. Inspection time: 10-25 business days; plan check 6-12 weeks. Seattle rule: Seattle SDCI has strict energy code (Stretch Code). Tree ordinance affects site work. ADU streamlined permitting. WA L&I license required for all contractors.

Washington sales tax and licensing for Concrete

Washington sales tax: 6.5% + local (~9.3% combined avg) + 0.471% B&O. WASHINGTON TAXES CONTRACTOR LABOR. Retail Sales Tax applies to total construction contract (labor + materials) on speculative builders. Custom construction taxed differently.

State license: Washington Department of Labor and Industries (L&I), required: $117 (initial) + $12K bond + insurance.

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