Top-rated sump pump or interior foundation drains installers.

Get matched with top sump pump or interior foundation drains installers in Mercer Island, WA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Sump pump or interior foundation drains installers in Mercer Island

Avatar for Insulation Co., LLC - Removal & Clean Outs
Insulation Co., LLC - Removal & Clean Outs
4.9(
207
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"Water had always been a problem for my crawlspace, especially during raining and snowing season. Asking around, installing a French drain and a sump pump appeared to be the solution. I searched around and picked Insulation Co. Estimation without inspection seemed weird at first, but it made totally sense since the foundation layout is all there in the files. Jo had always been responsive, detailed and nice whenever I had questions. Scheduling was easy and Rafael and the team did a great and efficient job onsite. 2 months after the installation, we noticed that there was still standing water and they came back to install more pipes and gravels. We really appreciate the effort."
1
2
3
1
2

+46

Response time5 hrs
Recommended by51%of homeowners
Avatar for Seatown Electric Plumbing Heating & Air
Seatown Electric Plumbing Heating & Air
4.8(
1,338
)

Serving Mercer Island, WA and surrounding areas

Approved (Corporate)

In business since 2013

Emergency services offered

Warranties offered

"Determined sump pump failure was not due to electrical issues. They kept me posted by text prior to arrival. Showed up on time. And even made phone calls to a plumbing group to get them out as soon as possible. The tech went out of his way to get us the help we needed."
Generator Repair
Additional Photos
Additional Photos
Electrical Panel Repair
Additional Photos

+44

95 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for All Pro Plumbing Northwest, LLC
All Pro Plumbing Northwest, LLC
4.8(
516
)

Serving Mercer Island, WA and surrounding areas

Approved

Super Service Award Winner

In business since 1994

Emergency services offered

Warranties offered

"Veteran-owned business. Honest, reputable and on time for the appointment. Ross and David spent all afternoon clearing out two clogged drain spouts and replaced/repaired a badly cracked PVC pipe after hydro jetting them. They inserted a snake with a camera and showed me the problem. They also provided a veteranâ  s discount! Thank You. Brad Pesek"
Our Team
128 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Schmitty's Plumbing
Schmitty's Plumbing
4.8(
48
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"Very well. They were very easy to schedule with. They followed up through several mediums to make sure we were all on the same page. They showed up on time, actually early! And the guys were very polite and respectful of our home. When they left they left me with faucets, showers and toilets that are no longer dripping leaking or clogged and a list of items I could do and the prices to do them. I loved the service and will use it and refer friends to use it as well."
Response time1 day
1 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Groundworks
Groundworks
4.6(
247
)

Serving Mercer Island, WA and surrounding areas

Approved (Corporate)

In business since 1995

Free estimates

Emergency services offered

"Had Groundworks install a drainage system and sump pump in our home’s crawl space. Anthony and his crew, Jordon, Uriel, and James were Outstanding. It was a three day job. They were on time every day and worked their tails off each day. It was a muddy job in cramped quarters. They never complained. Anthony kept me updated on the progress they made each day. Anthony shared pictures of the job as it progressed. They cleaned up the job site each day. Anthony went over all the details at the completion of the job and answered all of my questions. The whole process was Great. From the initial inspection done by Kristy to the office staff and the installation. The communication was also Great. I highly recommend Groundworks for a complete and thorough job."
Foundation
Foundation
Foundation
Concrete
Concrete

+16

Response time2 days
160 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Sump Pump Wizards LLC
Sump Pump Wizards LLC
New to Angi

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time4 hrs
3 neighbors recently requested a quote
Avatar for Pace Plumbing
Pace Plumbing
4.9(
13
)

Serving Mercer Island, WA and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"Riley offered to try an inexpensive fix that might be only temporary, but we asked him to go ahead and do the job right. The kitchen sink drain needed to be moved lower so that the dishwasher and disposer would drain properly (they didn't have to deal with such things in 1909!). He got it all done the same morning, and we are happy not to worry about water pouring out onto the floor."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+12

Recommended by84%of homeowners
Showing 1-10 of 15
FAQs for sump pump or interior foundation drains installation projects in Mercer Island, WA

Most residential pumps draw approximately 1,300 to 2,900 watts when they first start, then settle at roughly 800 to 1,050 watts during normal operation. The exact number depends on the motor’s horsepower and how often the float switch tells the pump to run. Even at the high end, the electricity cost is minor compared with the expense of cleaning up a flooded basement.

Grab a ruler and an empty 18‑inch‑wide pit. During a steady rain, time how much the water rises in one minute. Multiply that depth (in inches) by 60 to calculate gallons per hour, then add 50% for safety. If the result tops 2,100 gallons per hour—about 35 gallons a minute—you’ll need a 3/4‑horsepower unit. Anything lower, and a 1/3- or 1/2-horsepower pump should do the trick.

Loud rattling, constant cycling, or shuddering vibrations are the pump’s way of telling you it’s on its last legs. Musty smells, higher electric bills, and visible rust are other red flags. If the unit is 10 years old or older and exhibits any of these symptoms, replace it before the next heavy rain turns your basement into a wading pool.

You don’t have to hire a licensed plumber, but you should still bring in someone who installs sump pumps for a living—whether that’s a plumber, basement‑waterproofing specialist, or experienced handyman. They know the local codes, can wire the pump safely, and will test the system before they leave. Skipping professional help might void the warranty and could leave you with a pump that fails when you need it most.

Not every basement needs a pump, but if your home sits in a floodplain, has a high water table, or has ever taken on water during a storm, a sump pump is inexpensive insurance. For basements that only struggle with condensation or the occasional damp spot, sealing cracks and improving drainage may be all that is needed.

The Mercer Island, WA homeowners’ guide to sump pump or interior foundation drains installations

From average costs to expert advice, get all the answers you need to get your job done.