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Verified Reviews for Basement Waterproofing pros in Knightsen, CA

*The Angi rating for Basement Waterproofing companies in Knightsen, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Knightsen, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on November 20, 2025

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Avatar for Groundworks

Groundworks

4.38(
13
)
•Approved Pro

Groundworks

4.38(
13
)
•Approved Pro
Customers say: Quality work
50 local quotes requested
20 years of experience

Groundworks, formerly Bay Area Underpinning, specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento and San Jose areas. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation. Schedule your FREE inspection today! 1116054

"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."

Monica M on November 2025

Groundworks, formerly Bay Area Underpinning, specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento and San Jose areas. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation. Schedule your FREE inspection today! 1116054

"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."

Monica M on November 2025

Avatar for Groundworks

Groundworks

5.00(
2
)
•Approved Pro

Groundworks

5.00(
2
)
•Approved Pro
118 local quotes requested
2 years of experience

Groundworks specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"Juanpablo H. & Alex C. provided excellent service. Their knowledge and transparency gave me all the confidence that they?re the best persons for the job. Transparency is a major trust driver for me, and their ability to have frank and informative discussion earned my loyalty. Thank you both! "

Sam _ on May 2025

Groundworks specializes in helping homeowners with their residential and commercial foundation repair and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across the Sacramento area. With fully trained technicians, industry-leading products, and nationally backed warranties, Groundworks is here to restore your foundation.

"Juanpablo H. & Alex C. provided excellent service. Their knowledge and transparency gave me all the confidence that they?re the best persons for the job. Transparency is a major trust driver for me, and their ability to have frank and informative discussion earned my loyalty. Thank you both! "

Sam _ on May 2025

Avatar for Sears Home Services

Sears Home Services

3.91(
195
)

Sears Home Services

3.91(
195
)
Customers say: Super punctual
69 years of experience

Sears Home Services is America’s #1 appliance services provider. Our thousands of experts based throughout the U.S. deliver guaranteed quality and workmanship. We work on most makes and models whether they were purchased at Sears or not. We take care of your house so you can enjoy your home. Only Sears offers 3 unique ways to save on appliance repairs! 1. Standard Repair Service + 90 Day Guarantee • Cost is provided after technician diagnoses the problem • 90 day guarantee on parts and labor* 2. Flat Repair Cost + Extended Repair Coverage • $249.99 or $299.99 pre-set price (depending on type of appliance) • 1 year of coverage up to $500 for any additional repairs (includes parts)** 3. Flat Repair Cost + Multiple Appliance Coverage • $129.99 for your initial repair with purchase of Home Warranty Appliance Plan • 1 year of repair coverage for up to 10 appliances with 11 subsequent monthly payments of $49.99*** Book your appointment with a Sears expert technician today! * 90 Day Guarantee: The limited warranty provides that if within 90 days from the date of your Sears in-home repair your appliance fails to operate for reasons related to the original repair service when used normally in accordance with manufacturer guidelines, we will replace any parts that failed due to defects in the material or workmanship and perform any labor related to the original repair free of charge. Excludes damage caused due to service provided by any party other than Sears. This warranty gives you specific legal rights, and you may have other rights that vary by state. ** Appliance must be less than 10 years old to qualify for Service Smart Agreement. Covers up to $500 in parts and labor. Limitations apply. *** Limitations apply” Contact Name - Eric Wood.

"It was okay, he was a gentlemen. I was happy."

Rose E on January 2020

Sears Home Services is America’s #1 appliance services provider. Our thousands of experts based throughout the U.S. deliver guaranteed quality and workmanship. We work on most makes and models whether they were purchased at Sears or not. We take care of your house so you can enjoy your home. Only Sears offers 3 unique ways to save on appliance repairs! 1. Standard Repair Service + 90 Day Guarantee • Cost is provided after technician diagnoses the problem • 90 day guarantee on parts and labor* 2. Flat Repair Cost + Extended Repair Coverage • $249.99 or $299.99 pre-set price (depending on type of appliance) • 1 year of coverage up to $500 for any additional repairs (includes parts)** 3. Flat Repair Cost + Multiple Appliance Coverage • $129.99 for your initial repair with purchase of Home Warranty Appliance Plan • 1 year of repair coverage for up to 10 appliances with 11 subsequent monthly payments of $49.99*** Book your appointment with a Sears expert technician today! * 90 Day Guarantee: The limited warranty provides that if within 90 days from the date of your Sears in-home repair your appliance fails to operate for reasons related to the original repair service when used normally in accordance with manufacturer guidelines, we will replace any parts that failed due to defects in the material or workmanship and perform any labor related to the original repair free of charge. Excludes damage caused due to service provided by any party other than Sears. This warranty gives you specific legal rights, and you may have other rights that vary by state. ** Appliance must be less than 10 years old to qualify for Service Smart Agreement. Covers up to $500 in parts and labor. Limitations apply. *** Limitations apply” Contact Name - Eric Wood.

"It was okay, he was a gentlemen. I was happy."

Rose E on January 2020

SERVPRO San Mateo

4.50(
2
)

SERVPRO San Mateo

4.50(
2
)
Customers say: Terrific value
55 years of experience

SERVPRO of San Mateo is a trusted leader in the restoration industry and has the training, equipment, and expertise to handle your restoration and cleaning needs. As a locally owned and operated business, we can provide 24-hour emergency service and are dedicated to responding immediately to commercial or residential needs.

"Water line was replaced by plumbing company. Servepro came promptly at the agreed time. I had cleaned up a lot but water was still coming up from under linoleum. I told the man where it was still a problem and he set up three noisy blowers without wiping up remaining puddles first. He told me he would return between ten and eleven next day. When he didn't I phoned the office and they said it wasn't scheduled but they let me shut off the noisy blowers. After several calls they came about 2PM. I hate to think what my electricity bill will be. They billed my insurance company since I had a claim #."

Anita L on November 2019

SERVPRO of San Mateo is a trusted leader in the restoration industry and has the training, equipment, and expertise to handle your restoration and cleaning needs. As a locally owned and operated business, we can provide 24-hour emergency service and are dedicated to responding immediately to commercial or residential needs.

"Water line was replaced by plumbing company. Servepro came promptly at the agreed time. I had cleaned up a lot but water was still coming up from under linoleum. I told the man where it was still a problem and he set up three noisy blowers without wiping up remaining puddles first. He told me he would return between ten and eleven next day. When he didn't I phoned the office and they said it wasn't scheduled but they let me shut off the noisy blowers. After several calls they came about 2PM. I hate to think what my electricity bill will be. They billed my insurance company since I had a claim #."

Anita L on November 2019

Avatar for All Bay Air Duct Cleaning

All Bay Air Duct Cleaning

No reviews yet

All Bay Air Duct Cleaning

No reviews yet
12 years of experience

We offer all types of home insulation solutions. It includes crawl space insulation and vapor barriers, wall insulation, batts and blown-in attic insulation, air sealant for attic and crawl space, and radiant barrier. We specialize in air duct deep cleaning and replacement, furnace deep cleanings, duct leakage testing, rodent proofing, crawl space and attic clean up.

We offer all types of home insulation solutions. It includes crawl space insulation and vapor barriers, wall insulation, batts and blown-in attic insulation, air sealant for attic and crawl space, and radiant barrier. We specialize in air duct deep cleaning and replacement, furnace deep cleanings, duct leakage testing, rodent proofing, crawl space and attic clean up.

Wilkinson Design+Construction Inc.

No reviews yet

Wilkinson Design+Construction Inc.

No reviews yet
36 years of experience

Wilkinson Design & Construction, Inc CA State Lic. # 564598 72 Clayton Street San Rafael, CA 94901 phone: 415.785.7961 cell: 415.450.1845 fax: 415.226.0561 E-mail: [email protected] Webstite: www.WilkinsonDesign.net

Wilkinson Design & Construction, Inc CA State Lic. # 564598 72 Clayton Street San Rafael, CA 94901 phone: 415.785.7961 cell: 415.450.1845 fax: 415.226.0561 E-mail: [email protected] Webstite: www.WilkinsonDesign.net

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Basement Waterproofing questions, answered by experts

Venting the crawl space can be a good alternative to encapsulation if you live in a dry climate and the moisture problem isn’t severe. You could also try a dehumidifier or install a vapor barrier on the floor, leaving the walls exposed. A new drainage system may eliminate the moisture problem if it is not caused by humidity.

You can DIY basement waterproofing in some ways to help save on the overall costs. If your basement isn’t experiencing a lot of water but is noticeably humid, you can try running a dehumidifier that will pull the excess water out of the air. If you notice water leaking due to outdoor drainage issues, you can add downspout extensions to keep rainwater away from your home. 

However, if the problem is more severe and requires a more extensive solution, it’s best to call a basement waterproofing professional to assess the treatment you need and install waterproofing safeguards properly. Since keeping water out of your basement is important, ensuring this job is done correctly the first time is best.

A sump pump can remove excess moisture from under a house if standing water is present. Other ways to protect your crawl space from moisture include installing a vapor barrier, using a dehumidifier, installing insulation, and using a fan to dry the space. Finally, keeping your gutters clear of debris and positioning your downspouts away from the home’s foundation can prevent moisture from getting into the crawl space in the first place.

If a crawl space isn’t vented, there can be moisture buildup, which can lead to mold damage, easily destroying the foundation of your home. A closed-off crawl space can trap heat, which can be useful in the winter, but can also trap dangerous gases and prevent clean air from entering the home through the floorboards.

The best ventilation for a crawl space is a fully encapsulated crawl space with its own separate ventilation system. If you go this route, ensure you have the proper crawl space code requirements done and dusted before encapsulating your crawl space with a moisture barrier and installing appliances that may not be up to the proper specs.

The Knightsen, CA homeowners’ guide to basement waterproofing services

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

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