Top-rated basement waterproofing pros.

Get matched with top basement waterproofing pros in Walnut, CA

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Avatar for Eagle View Remodeling

Eagle View Remodeling

4.86(
50
)
Approved Pro

Eagle View Remodeling

4.86(
50
)
Approved Pro
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
684 local quotes requested

We have the experience and dedication to bring your dreams to reality! Specializing in Painting, Flooring and Ceramic Tile services, we guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today! Visit our website at https://eagleviewremodeling.com/.

"I was pleased with Amir and highly recommend him. He responded quickly with quotes and the delivery of professionals to my home to get the work done. The jobs were relatively small but he did not hesitate to help me. The quality of the work was excellent."

Susanne S on September 2025

We have the experience and dedication to bring your dreams to reality! Specializing in Painting, Flooring and Ceramic Tile services, we guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today! Visit our website at https://eagleviewremodeling.com/.

"I was pleased with Amir and highly recommend him. He responded quickly with quotes and the delivery of professionals to my home to get the work done. The jobs were relatively small but he did not hesitate to help me. The quality of the work was excellent."

Susanne S on September 2025


Avatar for Alpha Structural, Inc.

Alpha Structural, Inc.

8334 Foothill Blvd
4.67(
231
)
Approved Pro

Alpha Structural, Inc.

8334 Foothill Blvd
4.67(
231
)
Approved Pro
Customers say: Super punctual
217 local quotes requested
33 years of experience

Alpha Structural, Inc. has over 850 years of combined technical experience in Foundation and Hillside Repair. All of our experience is hard-core and down-in-the-trenches – not managed from behind a computer. Our in-house engineers and technicians are among the most experienced in all of Southern California. Alpha Structural, Inc. is the ONLY company in the SOCAL area licensed to ENGINEER and BUILD any type of repair project. That means that you'll work with us through the whole project, not unknown sub-contractors that you didn't hire and cannot control or predict. Alpha Structural, Inc. a licensed, bonded, and insured contractor (license # 663409). We are licensed with the following classifications: A (General Engineering Contractor). B (General Building Contractor). C-8 (Concrete). HIC (Home Improvement Contractor). CALL US NOW FOR AN INSPECTION OR ESTIMATE! (323)258-5482.

"I worked with Alpha once before, and they assisted with a second project 2 years ago which, now finally completed, I'm able to write a review about. Alpha helped with structural plans for windows in a garden level unit in order to prepare the proposal for city approval. Alpha is a big company and it took them a little while to complete everything; however I can certainly say that the engineer and contact people were knowledgeable and thorough. The plans were approved with their help and now that the unit is permitted for occupancy, the windows are a lovely attribute to the space."

Robert N on September 2024

Alpha Structural, Inc. has over 850 years of combined technical experience in Foundation and Hillside Repair. All of our experience is hard-core and down-in-the-trenches – not managed from behind a computer. Our in-house engineers and technicians are among the most experienced in all of Southern California. Alpha Structural, Inc. is the ONLY company in the SOCAL area licensed to ENGINEER and BUILD any type of repair project. That means that you'll work with us through the whole project, not unknown sub-contractors that you didn't hire and cannot control or predict. Alpha Structural, Inc. a licensed, bonded, and insured contractor (license # 663409). We are licensed with the following classifications: A (General Engineering Contractor). B (General Building Contractor). C-8 (Concrete). HIC (Home Improvement Contractor). CALL US NOW FOR AN INSPECTION OR ESTIMATE! (323)258-5482.

"I worked with Alpha once before, and they assisted with a second project 2 years ago which, now finally completed, I'm able to write a review about. Alpha helped with structural plans for windows in a garden level unit in order to prepare the proposal for city approval. Alpha is a big company and it took them a little while to complete everything; however I can certainly say that the engineer and contact people were knowledgeable and thorough. The plans were approved with their help and now that the unit is permitted for occupancy, the windows are a lovely attribute to the space."

Robert N on September 2024


Avatar for HIC Builders, Inc.

HIC Builders, Inc.

13455 Ventura Blvd
5.00(
11
)
Approved Pro

HIC Builders, Inc.

13455 Ventura Blvd
5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1036 local quotes requested

HIC ( Home Ideas and Construction ) is a Family owned Business we are construction company. We look forward to coming out to your home and exploring the best, most efficient and budget conscious way we can upgrade you home. Specialize in Remodeling kitchens, bathrooms, pavers, outdoor landscape, patio enclosures, painting and ADU's to garage conversion from blueprinting to city permits we can walk you thru . We know that you are putting your faith and trust in your contractor, we work hard to earn your trust and satisfaction. Our team of experts offers you the latest modern and eco-friendly, materials and aesthetic work that you can imagine.

"ADU construction Plumbing, electrical, drywall, Painting"

Elbia M on February 2025

HIC ( Home Ideas and Construction ) is a Family owned Business we are construction company. We look forward to coming out to your home and exploring the best, most efficient and budget conscious way we can upgrade you home. Specialize in Remodeling kitchens, bathrooms, pavers, outdoor landscape, patio enclosures, painting and ADU's to garage conversion from blueprinting to city permits we can walk you thru . We know that you are putting your faith and trust in your contractor, we work hard to earn your trust and satisfaction. Our team of experts offers you the latest modern and eco-friendly, materials and aesthetic work that you can imagine.

"ADU construction Plumbing, electrical, drywall, Painting"

Elbia M on February 2025


Avatar for Groundworks

Groundworks

1850 S. Parco Avenue
3.55(
20
)
Approved Pro

Groundworks

1850 S. Parco Avenue
3.55(
20
)
Approved Pro
Customers say: Super punctual
56 local quotes requested
30 years of experience

In 1995, EagleLift was founded in Rancho Cucamonga, bringing innovative foundation repair and soil stabilization solutions to Southern California. In 2024, EagleLift joined forces with Groundworks, the nation’s leading and fastest-growing foundation repair and water management solutions provider, and rebranded under the Groundworks name. They will continue to offer industry-leading technology and resources to more customers across California. Groundworks provides elite customer service and quality home solutions for all foundation repair and concrete repair needs. 1116054

"The job was done professionally and correctly"

Stephen B on October 2025

In 1995, EagleLift was founded in Rancho Cucamonga, bringing innovative foundation repair and soil stabilization solutions to Southern California. In 2024, EagleLift joined forces with Groundworks, the nation’s leading and fastest-growing foundation repair and water management solutions provider, and rebranded under the Groundworks name. They will continue to offer industry-leading technology and resources to more customers across California. Groundworks provides elite customer service and quality home solutions for all foundation repair and concrete repair needs. 1116054

"The job was done professionally and correctly"

Stephen B on October 2025


Avatar for Jrd construction

Jrd construction

6159 Melvin Avenue
5.00(
2
)

Jrd construction

6159 Melvin Avenue
5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

JRD Construction is located in Los Angeles, California and is proud to be Los Angeles leader among home remodeling contractors. We offer high quality materials and craftsmanship for all your home remodeling needs. With over 22 years of residential and commercial remodeling experience, JRD Construction has the expertise for your home improvement project!

"This company is an amazing company From the first meeting the guy was so nice and knowledgeable He helped me understand what was my problem and what are the possible solutions. would highly recommand!"

Orel L on December 2023

JRD Construction is located in Los Angeles, California and is proud to be Los Angeles leader among home remodeling contractors. We offer high quality materials and craftsmanship for all your home remodeling needs. With over 22 years of residential and commercial remodeling experience, JRD Construction has the expertise for your home improvement project!

"This company is an amazing company From the first meeting the guy was so nice and knowledgeable He helped me understand what was my problem and what are the possible solutions. would highly recommand!"

Orel L on December 2023



Avatar for Foundation Repair LA Inc

Foundation Repair LA Inc

9864 Glenoaks Blvd
5.00(
5
)

Foundation Repair LA Inc

9864 Glenoaks Blvd
5.00(
5
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Foundation and Structural Repair Contractors. Family owned and operated, based in Los Angeles, and serving the Greater Los Angeles area, Foundation Repair LA Inc. represents over 55 years of combined experience in structural repair, providing an unparalleled level of workmanship and customer service.

"I highly recommend them to everyone that needs help with their foundation. Very helpful and knowledgeable"

Rebecca H on October 2022

Foundation and Structural Repair Contractors. Family owned and operated, based in Los Angeles, and serving the Greater Los Angeles area, Foundation Repair LA Inc. represents over 55 years of combined experience in structural repair, providing an unparalleled level of workmanship and customer service.

"I highly recommend them to everyone that needs help with their foundation. Very helpful and knowledgeable"

Rebecca H on October 2022



RocFlooring

15017 Joycedale St
No reviews yet

RocFlooring

15017 Joycedale St
No reviews yet

Decorative and Industrial flooring. Repairs, polishing and coatings for garage, patio, deck, warehouse. Anaheim, Orange County. Factory trained, professional application at a very low price. I also do commercial waterproofing, and heavy duty floors for auto shops, warehouses, food grade and craft brewers. I only use USA made products that are environmentally safe. Licensed and insured general contractor for OC, Los Angeles, and Inland Empire.

Decorative and Industrial flooring. Repairs, polishing and coatings for garage, patio, deck, warehouse. Anaheim, Orange County. Factory trained, professional application at a very low price. I also do commercial waterproofing, and heavy duty floors for auto shops, warehouses, food grade and craft brewers. I only use USA made products that are environmentally safe. Licensed and insured general contractor for OC, Los Angeles, and Inland Empire.


Cleanforce Concrete Corporation

1895 W Commonwealth Ave
No reviews yet

Cleanforce Concrete Corporation

1895 W Commonwealth Ave
No reviews yet

Cleanforce Concrete provides high tec epoxy and concrete polishing services to clients ranging from a two car garage to industrial and commercial projects over 100,000 + Sq. Ft. and pretty much everything in between. Cleanforce has completed projects and provided for major work for Procter and Gamble, The Boring Company, (Spacex) Bebe International, Ace Hardware Stores, Rusty's Pizza chain, SSP AeroSpace, Pacific Design Center, Fire and Police stations for Culver City as well as projects on the U.C.L.A. and U.C.S.B. campuses. We have completed over thirteen million square foot of concrete polish and epoxy flooring systems in Southern California and will provide you with addresses to any of our projects for your review. We have a four million dollar comprehensive liability umbrella policy and will provide you with quality references upon request.

Cleanforce Concrete provides high tec epoxy and concrete polishing services to clients ranging from a two car garage to industrial and commercial projects over 100,000 + Sq. Ft. and pretty much everything in between. Cleanforce has completed projects and provided for major work for Procter and Gamble, The Boring Company, (Spacex) Bebe International, Ace Hardware Stores, Rusty's Pizza chain, SSP AeroSpace, Pacific Design Center, Fire and Police stations for Culver City as well as projects on the U.C.L.A. and U.C.S.B. campuses. We have completed over thirteen million square foot of concrete polish and epoxy flooring systems in Southern California and will provide you with addresses to any of our projects for your review. We have a four million dollar comprehensive liability umbrella policy and will provide you with quality references upon request.

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Basement Waterproofing questions, answered by experts

Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and—if your floors are wood—rotting.

Although the two terms are closely related and often used interchangeably, pier and beam foundations and crawl spaces are different things. A pier and beam foundation is made up of concrete piers and wooden beams and creates a space under the home known as a crawl space. There are several types of foundations that create crawl spaces, often collectively known as “crawl space foundations,” but the crawl space itself is separate from the foundation. 

Proper basement ventilation is very effective at reducing humidity. Without enough ventilation, your basement is prone to mold and moisture damage. Your basement should have as much natural ventilation via windows and doors as possible, and if your budget allows, you should also consider installing an ERV system to keep basement humidity levels at bay.

Several factors can impact the cost of waterproofing your basement. Some of the most common cost factors include:

  • Location

  • Square footage

  • Cause of the water leak

  • Type of foundation

  • Accessibility

  • Waterproofing method

  • Materials

  • Contractor experience and availability

  • Engineering reports, if needed

  • Structural and other repairs

  • Permits

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.

The Walnut, CA homeowners’ guide to basement waterproofing services

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