Basic
$15 – $29 per sq ft
Irregular flagstone about 1.5-2 in. thick, dry-laid on compacted gravel and sand, wide joints filled with stone dust
How Much Does Install Flagstone Patio Cost in Seattle, Washington?
Install Flagstone Patio: national installed price range, materials and labor breakdown, and local pricing by ZIP code.
Install Flagstone Patio in Seattle, Washington typically costs $17 to $34 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Install Flagstone Patio in Seattle, Washington
$17 – $34
per sq ftPrices in Seattle are 19.0% higher than the national average for install flagstone patio.
National average: $15 – $30 per sq ft
What you get at each price level
Standard
$17 – $34 per sq ft
Irregular flagstone about 1.5-2 in. thick, fitted with tighter joints, dry-laid on compacted gravel base, polymeric sand joints
Premium
$21 – $43 per sq ft
Select irregular flagstone about 1.5-2 in. thick in larger pieces, chisel-fitted tight joints, compacted gravel base, polymeric sand joints
Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $7.02 – $14 | sq ft |
| Labor | labor | $7.04 – $14 | sq ft |
| Supplies & Other | supplies | $1.87 – $3.74 | sq ft |
| Equipment & Disposal | equipment | $1.25 – $2.50 | sq ft |
Prices adjusted for Seattle local market conditions.
Install Flagstone Patio photo examples
Irregular flagstone patio with mortar joints leading to wood French doors
Photo: Shelterpro · CC BY-SA 4.0 · Source
Find a pro to do thisFlagstone patio with a seat wall and an umbrella table set among garden plantings
Photo: Field Outdoor Spaces · CC BY 2.0 · Source
Find a pro to do thisRed flagstone stepping stones set in a thyme border beside a cedar fence
Photo: patrick_standish · CC BY 2.0 · Source
Find a pro to do thisNew flagstone landing and steps with young plantings in mulch
Photo: Field Outdoor Spaces · CC BY 2.0 · Source
Find a pro to do this
Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($6.75-$13.50 per square foot)
- Labor ($5.25-$10.50 per square foot)
- Supplies & Other ($1.80-$3.60 per square foot)
- Equipment & Disposal ($1.20-$2.40 per square foot)
Local Price Adjustments
Material costs4.0% above avg
Labor costs34.0% above avg
Labor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.
Frequently Asked Questions
How we price this
BuildX Pro researches and reviews the national price range for Install Flagstone Patio, then adjusts it to your ZIP code for local labor and material costs using the public data below. Last checked Nov 2026.
- Construction wages by metro and rural area, used for the labor adjustment by ZIP code, U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025
- Regional price parities for goods, used for the materials adjustment by ZIP code, U.S. Bureau of Economic Analysis, 2024
Get Free Estimates in Seattle
Connect with local install flagstone patio contractors in Seattle for personalized quotes based on your specific project.