Cost to Shed Installation in Seattle, WA (2026)
If you’re budgeting a shed installation in Seattle, most projects run $1,784-$9,513, 19% above the $3,500 national average. What moves that number most is usually one thing: Shed Size. On its own it can swing the cost by $300 - $20,000+, so that’s the decision to slow down on before you sweat the smaller stuff.
Easiest place to save: Buy a prefab kit from a big-box store (Home Depot, Lowe's) rather than ordering through a contractor - kits run $800-$4,000 and you pay a contractor only for assembly labor, saving $500-$1,500
Why it costs this here: A carpenter in Seattle earns $40.42 an hour, 28% more than the $31.55 national average, 3rd highest of the 49 metros we price. Labor is 35% of what this particular job costs, which is why Seattle lands where it does: the materials cost roughly what they cost anywhere, and the wage is what moves.
The contractor market: Seattle is one of the deepest contractor markets we price: about 8,118 specialty-trade businesses operate in the metro (Census CBP 2022), so collecting three truly competitive bids is realistic here.
In the West Coast (where Seattle sits): Bay Area and Seattle add 25-35%; LA runs 20-25% above average; California permit requirements are strict.
$1,784-$9,513 in Seattle
19% above the national average · 1.19x cost multiplier
In Seattle, a shed installation runs $1,784 to $9,513 on average - about 19% above what homeowners pay nationwide. The West Coast market's labor costs account for most of the gap, with material pricing and local permitting fees adding to the spread. Use the cost table below to compare budget, mid-range, and premium options side by side.
Cost Breakdown in Seattle
| Line Item | Low | Mid | High |
|---|---|---|---|
| Cost per sq ft | $18 | $54 | $178 |
| Materials | $912 | $2,850 | $9,120 |
| Labor | $641 | $1,922 | $6,406 |
| Permits | $228 | $342 | $912 |
| Total | $1,781+19% vs. national avg | $5,114+19% vs. national avg | $17,008+19% vs. national avg |
Budget
8x10 ft prefab wood or metal shed kit, basic assembly on gravel base, no electrical, no foundation.
Mid-Range
12x16 ft prefab or site-built wood shed, concrete pier or gravel pad foundation, single window and door, basic shelving.
Premium
Custom 16x24 ft wood shed or barn-style structure, concrete slab foundation, electrical subpanel, insulation, windows, finished interior, matching house exterior.
Material Options
Material prices below are national averages; availability in Seattle may shift costs slightly.
| Material | Cost/Unit | Best For |
|---|---|---|
| Metal Shed Kit | $400-$1,500 (kit only) | Budget storage of lawn equipment and garden tools; flat lots with simple accessLowest upfront cost, fire-resistant, no wood rot, quick assembly |
| Wood Prefab Kit | $800-$4,000 (kit only) | Homeowners wanting a traditional look without the cost of custom buildBetter curb appeal than metal, more customizable, accepts paint and trim, widely available |
| Vinyl Shed | $1,500-$5,000 (kit only) | Low-maintenance storage in humid climates; homeowners who want a set-and-forget solutionNo rot, no rust, no painting required, resists insects and moisture, easy to clean |
| Custom Site-Built Wood Shed | $45-$150 per sq ft installed | Large structures, workshop or studio use, properties where aesthetics and resale value matterFully custom dimensions and design, can match house exterior exactly, supports electrical and insulation, highest resale value |
Other Projects in Seattle
Seattle Estimate
Typical Range
$1,784-$9,513
vs. National Average
19% above national
Cost Multiplier
1.19x
Cost Per sq ft
$18-$178
This 1.19x estimate prices Seattle labor from BLS Occupational Employment and Wage Statistics (May 2025) and applies a lighter regional adjustment to materials and permits, which vary less by metro than labor does. Actual bids vary by contractor, project scope, and timing.
See national average costs →