Sump Pump Installation Cost in Seattle (2026)
Average cost in Seattle
US$500 — US$4,500
Cost Breakdown
ItemizedProfessional plumbing and installation
40%
Sump pump unit, basin, and piping
25%
Concrete cutting and pit digging
20%
Seattle SDCI plumbing and electrical fees
10%
Dedicated outlet and wiring
5%
Sales Tax at 6.5%
📋What's Included
ScopeTypically Includes
- Sump pump unit
- Sump pit (basin)
- Check valve
- Discharge pipe
- Labor & installation
Typically Excludes
- Battery backup system
- Exterior drainage tie-in
- Floor drain installation
- Waterproofing
- Electrical panel upgrade
Based on a standard 1/3 HP submersible sump pump with new pit.
🧮Estimate Your Cost
InteractiveEstimated Cost
US$1,320 — US$1,980
Based on 14 sources and market data for Seattle. Actual costs may vary depending on specific project requirements.
🏢Top Sump Pump Contractors in Seattle
Verified providersSouth West Plumbing, Heating, Air, & Electric
825 S Stacy St, Seattle, WA 98134, USA
988 reviews
2 Sons Plumbing, Sewer, Septic, Electric, Heating & Air
2208 NW Market St #316a, Seattle, WA 98107, USA
3,698 reviews
Parker Services Plumbing
4601 Shilshole Ave NW Suite D, Seattle, WA 98107, USA
114 reviews
Provider data sourced from public business directories. Ratings and reviews are public and may change. LookupCost is not affiliated with listed providers.
💬What People Actually Paid
Community❓Common Questions
Yes, most installations require a plumbing permit (approx. $165) and an electrical permit (approx. $371) if a new dedicated outlet is installed. Seattle SDCI fees increased by 6.5% to 18% in 2026.
Cutting through a concrete basement floor to create a new pit can add $2,000 to $5,000 to the total project cost due to the need for jackhammering and debris removal.
Given Seattle's heavy rainfall and potential for power outages during storms, a battery backup system is highly recommended. It typically adds $500 to $1,200 to the installation cost.
Professional maintenance and cleaning in the Seattle area typically range from $150 to $300 per visit, recommended every 3 to 4 months for high-usage systems.
📊Our Methodology
How we collect dataAggregated from 5+ verified web sources and cost databases
Licensed contractor estimates and regional cost guides
Government construction and labor statistics
Community-reported project costs and reviews
Last data collection: today. Updates run weekly. All costs in USD.