Top-rated basement waterproofing pros.

Best basement waterproofing pros near Northridge, CA

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Top-Rated Basement waterproofing pros in Northridge - Updated Nov 2026

Avatar for Alpha Structural, Inc.
Alpha Structural, Inc.
4.6(
241
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Northridge, CA and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

"Dan was here this morning, showed him where water was leaking in over our slab and ruining the flooring in the master bedroom. He gave me the full range of possible remedies, from installing a eaves gutter on the roofline outside the bedroom to a full (very expensive) sealing of the entire exterior foundation. And actually recommended that we start with the gutter (which I can do myself) and then monitor the area next rainy season and see if that fixes the problem. No pressure to hire them or spend big $$, just good advice. Couldn't have asked for more. Highly recommended- this is real service!"
Basement Addition
Basement Expansion
Caisson Supported Retaining Wall
Cantilevered Deck Design Build
Deck Expansion and Slope Failure with Retaining Wall

+323

Response time10 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Western Rooter & Plumbing
Western Rooter & Plumbing
4.8(
172
)
Basement Drainage Channels - Install

Serving Northridge, CA and surrounding areas

Approved

In business since 1981

Free estimates

Emergency services offered

"This is the 5th or 6th time Western Rooter and Plumbing does a plumbing job in my house over past 10 years. They installed softwater tank, replaced waterheater, fixed plumbing, and more. Always excellent"
Ruben installs a new drainage system under a customers home. Working in a crawl space is rough, but we do what is needed.
Backing up? Got roots? Blast those roots out with a Hydro Jetter! We use a wart hog nozzle that combines controlled rotation with a unique 8 jet cutting configuration optimized for removing roots. It’s better with a jetter! Call us! We got this! ??
Sewer Line Camera
No drain clog too big or small, Western Rooter covers them all!
Justin clearing a Kitchen sink back-up after the Memorial holiday.
HALO 5 whole house water filtration system.

+542

Response time12 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Ideal Plumbing Inc.
Ideal Plumbing Inc.
5.0(
22
)
Basement Drainage Channels - Install

Serving Northridge, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Warranties offered

"Great. As always, Samuel found and fixed the problem and left everything cleaner than he found it. He is always reliable and on time and does what he says he will do. This is my go to plumber for everything!"
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+1

Response time7 hrs
Response rate100%
Recommended by63%of homeowners
Avatar for Team Rooter Plumbing of Ventura
Team Rooter Plumbing of Ventura
4.6(
12
)
Basement Drainage Channels - Install

Serving Northridge, CA and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"They were professional, on time, and explained exactly how the job was done. The repair was quick, the price was very reasonable, and they cleaned up perfectly afterward."
Sewer Lateral Replacement in Camarillo
Main Line Re-route & Repair in Oxnard
Main Sewer line Repair in Simi Valley by Team Rooter Plumbing.
Call Team Rooter 24/7 for any plumbing issues.
Sewer Lateral Replacement in Camarillo

+125

Response time9 hrs
1 neighbors recently requested a quote
Recommended by16%of homeowners
Team Rooter, Inc.
4.1(
40
)
Basement Drainage Channels - Install

Serving Northridge, CA and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

Team Rooter offers quality rooter and plumbing services to our customers in the greater Los Angeles area. This has been our passion! For this reason, our TEAM of professional plumbers and technicians use the latest equipment and state-of-the-art technology to find, diagnose and repair rooter and plumbing problems for our residential and commercial customers. We treat you like part of our TEAM; more like a friend or a neighbor and we aim to bring you the best plumbing experience possible. Whether its a clogged drain or a main sewer line replacement, when you need your job done quickly and correctly at an affordable price; contact Team Rooter . We are your top choice for drain cleaning, sewer repair, waterline repair, and more.

9 neighbors recently requested a quote
Recommended by63%of homeowners
Avatar for Golden Blade Grading Inc.
Golden Blade Grading Inc.
4.8(
6
)
Basement Drainage Channels - Install

Serving Northridge, CA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

Ay Golden Blade grading Inc. We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers' 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 time2 days
5 neighbors recently requested a quote
Recommended by80%of homeowners
RSF Construction Inc.
1.0(
1
)
Basement Drainage Channels - InstallBasement Drainage Channels - RepairFoundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Northridge, CA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

RSF Construction Inc. is a leader in providing our customers with the highest quality service in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

Palm Construction, Inc.
5.0(
112
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Northridge, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

It can be a daunting task looking for not only the right contractor for your job but also the right contractor for you. We completely understand what you're going through. We know every customer has different desires, different needs and different schedules. We're not only here to turn your ideas into reality but to make it a memorable experience every step of the way. Call us right now, no matter where you are in the planning process.

Recommended by100%of homeowners
Palm Construction, Inc.
5.0(
90
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Northridge, CA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"We worked with Ali (sales manager) and Tony (project manager), who took the time to design a project that made sense for our property and our budget, made a number of suggestions and recommendations and were never pushy or tried to "sell" us on something. The crew really went above and beyond to provide top quality workmanship and overall we were in very good hands. Highly recommended!"
Recommended by100%of homeowners
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Basement Waterproofing FAQs, answered by experts

Typically, waterproofing a basement should last up to 10 years. However, it’s worth noting that with proper maintenance and depending on the waterproofing method and installation quality, you can probably squeeze another decade out of it.

Yes, slab leaks are fairly common, especially in older homes and places that are prone to earthquakes which can move home foundations.

Standard homeowners insurance policies may cover basement water damage or flooding, but only if it is caused by a sudden and accidental event that is a covered peril, such as a burst pipe or a failing appliance. Damage caused by natural flooding from extreme weather, groundwater seepage, or heavy rain is typically excluded and requires a separate flood insurance policy. Some insurers also offer an optional water backup endorsement for issues like sewer backups. Review your policy or speak with your agent to understand your specific coverage.

Basements with persistent moisture problems or flooding shouldn’t be finished until the moisture issues have been fixed. In addition, if your foundation is cracked, you have unmitigated radon levels, or you have asbestos or lead pipes, remediate the underlying problem before finishing your basement. Turning a basement into living space before fixing these issues can lead to serious health risks or structural damage. 

Most people consider a French drain to be one of the most effective solutions for foundation leaks, but it’s not always a standalone solution. French drains will help keep water away from your foundation to reduce the risk of leaking and structural damage from soil expansion, but depending on your foundation type and location, you might need other systems or techniques—like soil gradation and gutter and leader installation—to resolve the underlying problem.

The Northridge, CA homeowners’ guide to basement waterproofing services

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