Basic
$222 – $623 each
Natural flagstone tread about 2-3 in. thick on a compacted gravel base with a stacked stone riser, dry-set, leveled and pitched to drain

Photo: Peg Syverson · CC BY 2.0 · Source
Build one outdoor flagstone step (stone tread and riser on a compacted or mortared base), per step.
Install Flagstone Step in Washington, District of Columbia typically costs $262 to $733 each as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Prices in Washington are 5.0% higher than the national average for install flagstone step.
National average: $250 – $700 each
$222 – $623 each
Natural flagstone tread about 2-3 in. thick on a compacted gravel base with a stacked stone riser, dry-set, leveled and pitched to drain
$262 – $733 each
Flagstone tread about 2-3 in. thick on compacted gravel, fitted stone riser, tread pitched slightly forward to drain
$327 – $916 each
Select flagstone tread about 2-3 in. thick with a chiseled front edge, mortared onto a stone riser base, pitched to drain
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $118 – $331 | each |
| Labor | labor | $92 – $255 | each |
| Supplies & Other | supplies | $32 – $88 | each |
| Equipment & Disposal | equipment | $21 – $59 | each |
Connect with local install flagstone step contractors in Washington for personalized quotes based on your specific project.