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Top-Rated Foundation drain installation pros in Thornton - Updated Nov 2026

Drain Unlimited, LLC
4.6(
31
)
Sump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

In business since 2001

Emergency services offered

Warranties offered

Welcome to Drain Unlimited, LLC. From toilets to faucets and waterheaters to all phase of draining system, you can expect Drain Unlimited, LLC, to provide fast economical quality service for your business or home. Drain Unlimited, LLC, is simply the best Denver plumbing company. When homeowners and businesses in Denver area need plumbing work, they can rely on Drain Unlimited, LLC, to provide the highest quality and quickest service in the area.

Response time7 hrs
Recommended by93%of homeowners
Avatar for Liftech Corporation
Liftech Corporation
4.7(
175
)
Foundation Drainage - Install or Replace

Serving Thornton, CO and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"We recently had a team work on our home to fix a variety of foundation problems. In short, good communication and friendly customer service. Our sales rep Michael Freddolino was great. He was quick to respond to my first call and followed up without pestering when my husband and I dropped the ball and explained everything in a way we could understand it. Austin, Johnathan, Chris and Isaiah were the crew who worked at the house and were the nicest and most respectful group of workers. They were careful with our home, inside and out and cleaned up any mess that was made. They communicated very well with us to let us know how the progress was going and other items they ran into so they could be resolved right away. And if you can believe it, we ended up spending less than was originally estimated! I would definitely recommend them."
Driveway
Helical Pier insatll
Driveway
Helical pier Install
Before

+23

Response time5 hrs
2 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Rooter Guy, LLC
Rooter Guy, LLC
4.6(
3,130
)
Sump Pump or Interior Foundation Drains - Install

Serving Thornton, CO and surrounding areas

Approved

Super Service Award Winner

In business since 1995

Free estimates

Emergency services offered

"Had them replace a drain pipe in my foundation. They were timely and efficient. Price was very good as I have been through this nightmare before. Really appreciated Keith and Nico! When Keith arrived, I instantly knew I had the right guy advising me on this. Nico did a great job doing the job. Thank you both."
sewer cleaning
1332 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Legacy Concrete Inc
Legacy Concrete Inc
4.5(
352
)
Concrete Foundation - Install

Serving Thornton, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Warranties offered

"We have been living with a sunken patio and a walkway that slopes the wrong way for years and we finally decided to do something about it. After a lengthy Google, Yelp, BBB and other site searches we solicited bids from four concrete contractors. We selected Legacy. From the initial estimate through final inspection, The owner, Robert, and the crew were fantastic. Our situation was a difficult one, and no other contractor could develop and execute a creative solution that addressed all of our many issues. Jacob and the work crew were great to work with, kept us informed throughout, and really produced a wonderful result. Legacy was not the lowest bid, but was by far the best design to do the job. We can’t recommend this family business highly enough."
Concrete - Pouring & Repair Project
Concrete - Pouring & Repair Project
Concrete - Pouring & Repair Project
Concrete - Pouring & Repair Project
Concrete - Pouring & Repair Project

+6

1 neighbors recently requested a quote
Recommended by93%of homeowners
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Foundation Drain Installation FAQs, answered by experts

French drains, sump pumps, and exterior waterproofing systems are common options. Choose one that best suits your property’s needs.

The difference between an ejector pump and a sump pump lies in their purpose and design—an ejector pump functions to remove liquid gray water and soft solid sewage waste from your home. If you have a laundry room or bathroom in your basement, an ejector pump for your sewage tank prevents sewage from backing up in your washing machine or bathroom’s drains.

A sump pump is designed to remove excess groundwater that may enter your home, either due to flooding or periods of heavy rain.

The best basement waterproofing method depends on the specific issue causing the water intrusion. For minor problems, simple solutions like installing a properly functioning gutter system to direct runoff away and grading the soil to slope away from your foundation can be effective.

If you have more significant water problems, the solution will need to be more robust:

  • For standing water on the basement floor, a floor drain or a sump pump system may be the best solution.

  • For water pooling around the foundation, installing an exterior French drain can intercept water before it reaches the basement walls.

Other effective waterproofing methods, which can be used depending on your home's specific needs, climate, and soil type, include sealing the interior walls, landscape alteration, installing interior drainage systems, and using a dehumidification system to control moisture levels.

DIY is possible for small systems like French drains. Professional installation ensures proper grading and long-term effectiveness.

A sewage ejector pump is necessary if you have any plumbing fixtures, such as a bathroom, laundry room, or sink, located below the level of your home's main sewer line. Standard plumbing relies on gravity to drain wastewater and solid waste into the municipal sewer system or a septic tank. For fixtures below this level, like those in a basement, gravity cannot move the waste upward. The ejector pump provides the force needed to pump the sewage up to the main line. Without one, wastewater from below-ground fixtures would back up, potentially causing a sewage overflow and flooding. If all of your plumbing is on the main floor or higher, gravity is sufficient and an ejector pump is not needed.

The Thornton, CO homeowners’ guide to foundation drain installation services

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