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%
11 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%
8 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(
39
)
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 by65%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

The foundation repair that will work best varies based on the extent of the damage, the underlying cause, soil conditions, weather conditions, and more. Permanent foundation solutions like underpinning and exterior drainage solutions are better than temporary fixes that don’t address the source of the issue. Some examples of more temporary solutions include mudjacking or slabjacking, waterproof paint, and dampproofing. The best course of action is to have a reliable foundation specialist inspect your issue, treat the underlying problem, and restabilize your foundation.

External pressure on the basement wall can cause it to bow inward. Soil, heavy with water saturation, is commonly the main culprit. The soil exerts immense pressure on the wall, causing it to fail, at least partially. This is known as hydrostatic pressure—these situations can occur after rainfall or simply due to regular groundwater presence and may be temporary or more permanent.  

No, your basement dehumidifier doesn’t need to be on 24/7. While it’s an excellent tool for tackling damp, musty air, especially in humid seasons, leaving it running nonstop can backfire. Over-drying the space can mess with your sinuses, warp wood, and even crack certain materials. Instead, only use your humidifier when moisture levels rise above 50%, and then give it a break when the humidity levels drop.

A moisture or vapor barrier helps separate the warm air inside your home from the cold air outside of it. Without it, your walls could collect condensation, mold, or other damage. Check your local building codes to see if including an interior vapor barrier is necessary for your building project or renovation, especially for rooms that are likely to be humid, like bathrooms.

Installing a bathroom in a basement isn’t a project for most homeowners. Many parts—plumbing, electricity, and carpentry—go into this project, each requiring expert-level knowledge and tools. One miscalculation can lead to very expensive repairs. Plus, some homeowner’s insurance might not pay for damages caused by a homeowner DIYing this project. You can protect yourself by allowing the pros to complete this job for you. 

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.