Sump Pump Installation & Replacement in King & Snohomish County

Most crawl space sump pump installations in King County and Snohomish County range from $1,200 to $4,000. The final price depends on crawl space access, soil conditions, discharge line routing, and whether you add a battery backup system. We provide a written estimate with line items before any work starts.

If you see standing water in your crawl space after rain, notice water stains on foundation walls, smell persistent mustiness in the home, or have a known high water table in your neighborhood, a sump pump is likely the right solution. We offer free crawl space inspections so you can get a professional opinion before committing to anything.

Most installations are completed in one day. If the project involves extensive drainage work, exterior discharge routing, or additional crawl space repairs, it may extend to a second day. We give you a timeline during the estimate.

Yes. We recommend testing your sump pump every three to four months by pouring water into the pit and confirming the pump activates. Check that the float switch moves freely and that the discharge line is clear. An annual professional inspection is a good idea, especially before the rainy season.

Without a battery backup, your sump pump stops working when the power goes out. That is often the worst time to lose protection, since heavy storms can knock out power and flood your crawl space simultaneously. We install battery backup systems that keep the pump running for hours during an outage.

A submersible pump sits inside the sump pit, fully submerged in water. It runs quieter and stays out of the way. A pedestal pump has the motor mounted above the pit with just the intake reaching into the water. Pedestal pumps are easier to service but louder. For crawl spaces, we typically recommend submersible pumps because of the tight clearance.

If your area loses power during storms or if you rely on the sump pump to keep your crawl space dry year-round, a battery backup is worth the investment. It is not required for every installation, but we recommend it for homes with a history of flooding or areas with a high water table. We will be honest about whether your situation calls for one.

Yes. We install sump pumps in existing crawl spaces as a standalone project or as part of a larger moisture control plan. We excavate the pit, install the pump and basin, route the discharge line, and test the system. The crawl space does not need to be empty or encapsulated first, though we often pair sump pumps with vapor barrier work for a complete solution.

The pump pushes water through a discharge line that routes outside and away from your foundation. We typically run the line to a point in the yard where water can drain naturally without pooling near the house. Local code determines the exact routing requirements, and we handle all of that during installation.

A quality sump pump typically lasts 7 to 10 years with proper maintenance. Battery backups usually need battery replacement every 3 to 5 years. If your existing pump is cycling constantly, making unusual noises, or failing to activate, it is time for a replacement. We install contractor-grade pumps designed for continuous residential use.

A sump pump removes standing water and prevents flooding, but it does not control humidity or stop moisture from evaporating through the soil. For complete moisture management, we often pair a sump pump with a vapor barrier and sometimes a dehumidifier. During our inspection, we will tell you what combination your crawl space actually needs.

Yes. Every installation includes a workmanship warranty covering the pit, plumbing, discharge line, and electrical connections. The pump itself carries the manufacturer warranty, which varies by brand and model. We use reliable, contractor-grade equipment and stand behind our work.