Basic
$1,947 – $7,786 per project
Prefab steel spiral kit about 5 ft diameter, flat steel treads, round balusters, steel handrail, black paint finish, anchored
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How Much Does Iron Spiral Staircase Cost in Seattle, Washington?
Supply and install one prefab steel or wrought/cast iron spiral staircase kit (single floor rise) with railing, anchored top and bottom.
Iron Spiral Staircase in Seattle, Washington typically costs $2,290 to $9,160 per project as of 2026. Prices reflect local labor and material rates. Use our calculator below for a detailed, ZIP-code-adjusted estimate.
Iron Spiral Staircase in Seattle, Washington
$2,290 – $9,160
per projectPrices in Seattle are 19.0% higher than the national average for iron spiral staircase.
National average: $2,000 – $8,000 per project
What you get at each price level
Standard
$2,290 – $9,160 per project
Steel spiral kit about 5 ft diameter, steel treads with wood caps, powder-coated finish, steel handrail, anchored
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Find a pro to do thisPremium
$2,863 – $11,450 per project
Cast iron spiral kit about 5 ft diameter with ornamental cast treads and balusters, powder-coated, wood handrail, anchored
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Cost Breakdown in Seattle
| Component | Category | Price Range | Unit |
|---|---|---|---|
| Materials | material | $936 – $3,744 | job |
| Labor | labor | $938 – $3,752 | job |
| Supplies & Other | supplies | $250 – $998 | job |
| Equipment & Disposal | equipment | $166 – $666 | job |
Prices adjusted for Seattle local market conditions.
Iron Spiral Staircase photo examples
Black metal spiral staircase on the exterior of a house
Photo: Missvain · CC BY 4.0 · Source
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Cost Factors in Seattle, Washington
What Affects Pricing
- Materials ($900.00-$3,600.00 per project)
- Labor ($700.00-$2,800.00 per project)
- Supplies & Other ($240.00-$960.00 per project)
- Equipment & Disposal ($160.00-$640.00 per project)
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 Iron Spiral Staircase, 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 iron spiral staircase contractors in Seattle for personalized quotes based on your specific project.