Insulation Installation cost in Seattle, WA
Seattle homeowners typically pay $2,300 – $6,900 for insulation installation. Local labor and materials price 28% above the national average.
Seattle average
$4,600
Typical low
$2,300
Typical high
$6,900
Per square foot
$2 – $6
Sample ZIP
98101
What drives Seattle pricing
Local labor
Seattle trade labor is among the most expensive in the country and books months ahead.
Permits & code
SDCI permits and inspections are required for most exterior and structural work.
Climate & conditions
Persistent rain demands drainage detailing, flashing and rot-resistant materials.
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Estimated project cost
$2,588 – $3,534
Most homeowners pay around $3,061
Compare quality / material level
Cost by material in Seattle
Installed Seattle pricing per square foot.
| Option | Installed cost |
|---|---|
| Fiberglass batts | $2 – $3 |
| Blown-in cellulose | $3 – $4 |
| Open-cell spray foam | $4 – $5 |
| Closed-cell spray foam | $5 – $7 |
Where the money goes in Seattle
A typical $4,600 Seattle project, broken down by line item.
- Labor0.45% · $21
- Materials0.38% · $17
- Permits & inspections0.05% · $2
- Overhead & profit0.12% · $6
Common add-ons
Extras that show up on Seattle quotes but rarely in the headline price.
Air sealing package
Old insulation removal
Attic hatch and duct sealing
Vapor barrier
Ways to save in Seattle
- Claim the 30% federal energy efficiency tax credit where eligible.
- Check for utility rebates before scheduling — many cover 30–70% of attic work.
- Collect three written bids on an identical scope — spreads of 20–40% are normal.
- Book in the off-season and stay flexible on the start date to save 5–15%.
- Bundle nearby work into one mobilization so you only pay setup and travel once.
- Ask what the contractor would change to cut 10% without hurting durability.
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