Basic
$1.46 – $4.38 per sq ft
Mixed 3/4 to 1-1/2 in. river rock 2-3 in. deep over light-duty weed barrier, raked even

Install decorative river rock 2-3 inches deep over weed barrier in beds or borders, rock, delivery and labor included.
Install Landscape River Stone in Seattle, Washington typically costs $1.72 to $5.15 per sq ft as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Seattle are 19.0% higher than the national average for install landscape river stone.
National average: $1.50 – $4.50 per sq ft
$1.46 – $4.38 per sq ft
Mixed 3/4 to 1-1/2 in. river rock 2-3 in. deep over light-duty weed barrier, raked even
$1.72 – $5.15 per sq ft
Washed 1 to 3 in. river rock in a blended color 2-3 in. deep over woven weed barrier, raked even
$2.15 – $6.44 per sq ft
Select smooth river cobbles in a uniform tone 2-3 in. deep over heavy weed barrier, hand-placed at visible edges
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $0.71 – $2.11 | sq ft |
| Labor | labor | $0.70 – $2.10 | sq ft |
| Supplies & Other | supplies | $0.19 – $0.56 | sq ft |
| Equipment & Disposal | equipment | $0.12 – $0.37 | sq ft |
Labor costs in Seattle run proportionally higher than materials, which may favor material-heavy solutions.
Connect with local install landscape river stone contractors in Seattle for personalized quotes based on your specific project.