Roof Replacement Contractors in Seattle, WA: What to Ask Before You Hire
Seattle roofs do not get beaten by hail — they get worn down by nine months of moisture, moss and shade. That changes what a good bid looks like: ventilation, flashing detail and drainage matter more here than shingle brand, and Washington gives you a genuinely useful way to verify a contractor before you sign.
By Jason Green · Roofing & Gutters · Published August 25, 2026 · 7 min read
What a roof replacement costs in Seattle
A 20 to 25 square asphalt composition tear-off and replacement runs $14,000 to $23,000 in 2026, reflecting Seattle labor rates, steeper pitches and the disposal cost of multiple existing layers.
Standing-seam metal — common on Craftsman and mid-century homes in Ballard, Wallingford and West Seattle — runs $32,000 to $60,000. Cedar shake replacement is $30,000 and up and is restricted in some jurisdictions.
Check the L&I registration yourself
Washington requires contractors to register with Labor & Industries, and the L&I 'Verify a Contractor' lookup shows the registration status, the bond, the insurance and any judgments against the company. That last part is the most useful free tool a Seattle homeowner has.
Confirm the business name on the contract matches the registration exactly, and that the bond and liability insurance are current. A lapsed bond is the single most common red flag you will find in that lookup.
Wet-climate questions that separate the bids
What is the ventilation plan? Under-ventilated Seattle attics grow condensation that rots decking from inside, and the fix is ridge and soffit intake, not a bigger shingle.
How are the chimney, skylight and sidewall flashings being rebuilt? On a rain-driven roof, flashing is where replacements fail first.
What is the moss plan — zinc strips, treatment, or trimming the overhanging limbs that cause it in the first place?
Is the underlayment synthetic and fully sealed at the eaves? Ask what happens if the roof is open when the weather turns.
Timing around the rain
June through September is the dry window and books out early. If you are replacing in the wet months, ask specifically how the crew dries in each day's work and what the plan is for an unexpected storm.
Reroofs in Seattle generally require a permit through Seattle Department of Construction and Inspections when structural work or more than a simple overlay is involved — the contractor should pull it in their name.
Typical cost ranges
| Composition shingle replacement, 20-25 squares | $14,000 - $23,000 |
| Standing-seam metal roof | $32,000 - $60,000 |
| Cedar shake replacement | $30,000 - $55,000 |
| Decking replacement (per 4x8 sheet) | $85 - $150 |
| Ridge and soffit ventilation upgrade | $900 - $2,600 |
Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.
Common questions
How much does a new roof cost in Seattle?
$14,000 to $23,000 for a standard composition shingle tear-off and replacement in 2026. Standing-seam metal runs $32,000 to $60,000.
How do I verify a Seattle roofing contractor?
Use the Washington L&I 'Verify a Contractor' lookup. It shows registration status, bond, insurance and any judgments — check that the business name matches the contract exactly.
When is the best time to reroof in Seattle?
June through September is the dry window, and it books out months ahead. Wet-season work is possible but ask how the crew dries in each day.
Does moss mean I need a new roof?
Not by itself. Moss holds moisture against the shingle and shortens its life, so treat it and trim the overhanging limbs — but a roof already at 20-plus years with heavy growth is usually near the end.
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