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Top-Rated Sump pump or interior foundation drains installers in Napa - Updated Nov 2026

Avatar for Oak Plumbing Inc
Oak Plumbing Inc
4.6(
101
)
Sump Pump or Interior Foundation Drains - Install

Serving Napa, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2016

Free estimates

Emergency services offered

"Jared showed up and wasted no time in doing two things at once (draining the hot water heater and repairing a small fireplace gas leak). He educated me a little on what he was doing which is always helpful. He was also careful to keep his booties on, so as not to ruin the shiny wood floors. Highly recommend based on this experience."
Response time2 days
5 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Groundworks
Groundworks
4.6(
19
)
Sump Pump or Interior Foundation Drains - Install

Serving Napa, CA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"I highly recommend Groundworks for foundation concerns. They were very prompt with returning my call and providing a free inspection. I had concerns for my 103 year old home, especially a section of the foundation. Their Inspector, Bob Bloom, arrived on time, was professional and experienced, took time to answer all my questions (thank you for not rushing), and provided me with useful feedback on my foundation and options for repair. Bob gave an honest assessment with no sales pressure. Although I decided to defer foundation work at this time, I will definitely use them in the future."
Basement
Basement
Basement
Basement
Foundation

+16

169 neighbors recently requested a quote
Recommended by58%of homeowners
Avatar for Rooter Cowboy Plumbing
Rooter Cowboy Plumbing
5.0(
6
)
Sump Pump or Interior Foundation Drains - Install

Serving Napa, CA and surrounding areas

Approved

In business since 2020

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 custom 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.

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Avatar for Same Day Plumbing, Heating, Cooling
Same Day Plumbing, Heating, Cooling
5.0(
1
)
Sump Pump or Interior Foundation Drains - Install

Serving Napa, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

Family-owned Same Day Heating, Cooling, Plumbing operates out of Windsor, just north of Santa Rosa. We offer fast, reliable AC repair and installation services, heater repair & installation, and plumbing services, in the North Bay area of California. Our promise to you is always that if we do not fix your system the SAME DAY we arrive… you DON’T pay the service fee. Our home service experts are licensed and insured with more than 100 years of leadership experience. Additionally, we back all of our installation and replacement services with a 24-month, 100% satisfaction guarantee.

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+8

53 neighbors recently requested a quote
Avatar for EM Pro Construction
EM Pro Construction
New to Angi
Sump Pump or Interior Foundation Drains - Install

Serving Napa, CA and surrounding areas

Approved

In business since 2014

Free estimates

Small jobs welcome

We are not just another construction company. We are a licensed, insured and bonded company since 2014.\n What sets us apart from our competition, you may ask? Well: Your project will have its own personality, with great workmanship, quality and integration and excellent services that exceeds your satisfaction. \nWe are a family business company and most important to us is to establish trust with every clients. Commitment and communication that allows you to recommend us to families and friends.\n

remodel deck
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+15

1 neighbors recently requested a quote
Avatar for Roroman Plumbing
Roroman Plumbing
4.5(
168
)
Sump Pump or Interior Foundation Drains - Install

Serving Napa, CA and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"Jose answered the phone right away (nice!). I told him of my issues - he said he can be there in 30 minutes. He showed up on time, he was very courteous, worked very quickly, left no mess and he wiped his feet when he came in. He told me why the problem was happening and I asked him if this is something I need to take care of right away. He said no need to worry right away but he can take care of it, if I wanted. Nice not to be pressured into something (like so many plumbers do to make big bucks, which is why I hate to call them). I was very pleased with his service and he was very appreciative for the business. I called 4 other companies (not on Angies list) and no one called me back. I will be calling Jose for any future plumbing needs and letting my friends know about him. FYI - he does not take credit cards, cash or check only."
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+3

Recommended by91%of homeowners
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FAQs for sump pump or interior foundation drains installation projects in Napa, CA

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 Napa, CA 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.