Cost to Whole-House Dehumidifier Installation in Seattle, WA
$2,176–$5,376 in Seattle
28% above the national average · 1.28x cost multiplier
In Seattle, a whole-house dehumidifier installation runs $2,176 to $5,376 on average — about 28% 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 |
|---|---|---|---|
| Materials | $1,024 | $1,920 | $3,584 |
| Labor | $640 | $1,152 | $1,920 |
| Permits | $0 | $0 | $128 |
| Total | $1,664+28% vs. national avg | $3,072+28% vs. national avg | $5,888+28% vs. national avg |
Budget
Basic 70-pint whole-house dehumidifier tied into existing ductwork with gravity drain
Mid-Range
90-pint ducted dehumidifier with dedicated return, condensate pump, and humidistat controls
Premium
High-capacity 130+ pint commercial-grade unit with dedicated ductwork, smart controls, and whole-house coverage for 3,000+ sq ft
Material Options
Material prices below are national averages; availability in Seattle may shift costs slightly.
| Material | Cost/Unit | Best For |
|---|---|---|
| Standard Ducted Dehumidifier (70 pint) | $800-$1,200 | Average-sized homes in moderate humidity areasAffordable, handles most homes, widely available, easy to service |
| High-Capacity Ducted (90-100 pint) | $1,200-$1,800 | Homes 2,500-3,500 sq ft or in high-humidity regions like the Gulf CoastHandles larger homes, better energy efficiency ratings, quieter operation |
| Commercial-Grade (130+ pint) | $2,000-$3,500 | Large homes, finished basements with persistent moisture, or coastal propertiesHandles extreme humidity, covers 3,000+ sq ft, longest warranties |
| Ventilating Dehumidifier | $1,500-$2,500 | Tight new-construction homes that need both dehumidification and fresh air exchangeBrings in fresh outdoor air while dehumidifying, improves IAQ, meets ventilation codes |
Other Projects in Seattle
Seattle Estimate
Typical Range
$2,176–$5,376
vs. National Average
28% above national
Cost Multiplier
1.28x
Estimates apply Seattle's 1.28x regional cost multiplier to national averages. Actual bids vary by contractor, project scope, and timing.
See national average costs →