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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 January 06, 2026

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Avatar for Groundworks

Groundworks

4.67(
12
)
•Approved Pro

Groundworks

4.67(
12
)
•Approved Pro
Customers say: Quality work
21 years of experience
Free onsite estimate

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

"We hired Groundworks CA (fka Bay Area Underpinning) for what we understood was a full foundation repair. We paid $42K. They only worked on the rear and never informed us that the front wasn’t included. Months later, while selling our home, a third-party engineer found $189K in unaddressed issues at the front. We were blindsided, lost our buyer, and suffered major financial and emotional stress. Groundworks later admitted they hadn’t measured the front. Their rushed “final inspection” months later felt reactive, not professional. When asked for a partial refund, they refused. We feel misled and abandoned. Avoid."

Dominick M on June 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

"We hired Groundworks CA (fka Bay Area Underpinning) for what we understood was a full foundation repair. We paid $42K. They only worked on the rear and never informed us that the front wasn’t included. Months later, while selling our home, a third-party engineer found $189K in unaddressed issues at the front. We were blindsided, lost our buyer, and suffered major financial and emotional stress. Groundworks later admitted they hadn’t measured the front. Their rushed “final inspection” months later felt reactive, not professional. When asked for a partial refund, they refused. We feel misled and abandoned. Avoid."

Dominick M on June 2025

Avatar for Groundworks

Groundworks

5.00(
4
)
•Approved Pro

Groundworks

5.00(
4
)
•Approved Pro
3 years of experience
Free onsite estimate

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.

"Juan G was the Forman and Mike was our Piering crew. They were able to put in 7 jacks and complete the job within 1 week! I really appreciated how Juan kept me informed about the job and how they always left their work areas clean and tidy."

Kristina S on December 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.

"Juan G was the Forman and Mike was our Piering crew. They were able to put in 7 jacks and complete the job within 1 week! I really appreciated how Juan kept me informed about the job and how they always left their work areas clean and tidy."

Kristina S on December 2025

Avatar for Foundation Repair of CA

Foundation Repair of CA

5.00(
2
)
•Approved Pro

Foundation Repair of CA

5.00(
2
)
•Approved Pro
Customers say: Quick response
15 years of experience
Free onsite estimate

At Foundation Repair of CA, we specialize in stabilizing homes and businesses throughout Northern California. We specialize in primary foundation damage repair of all types. We provide solutions for failing foundations, including sinking or settling foundations, sagging crawl space, crawl space encapsulation and insulation, and earthquake retrofitting. Our expertise also includes concrete restoration, which incorporates concrete lifting and leveling of slabs, driveways, walkways and pool decks, and more! We pride ourselves in providing free, no obligation foundation repair quotes for homeowners within our service area. Protect your home or business. Call us today.

"All around good experience"

Tat H on August 2023

At Foundation Repair of CA, we specialize in stabilizing homes and businesses throughout Northern California. We specialize in primary foundation damage repair of all types. We provide solutions for failing foundations, including sinking or settling foundations, sagging crawl space, crawl space encapsulation and insulation, and earthquake retrofitting. Our expertise also includes concrete restoration, which incorporates concrete lifting and leveling of slabs, driveways, walkways and pool decks, and more! We pride ourselves in providing free, no obligation foundation repair quotes for homeowners within our service area. Protect your home or business. Call us today.

"All around good experience"

Tat H on August 2023

RSF Construction Inc.

New on AngiNew on Angi
•Approved Pro

RSF Construction Inc.

New on AngiNew on Angi
•Approved Pro
7 years of experience
Free onsite estimate

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!

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!

Avatar for Garage Experts Of Sacramento

Garage Experts Of Sacramento

5.00(
25
)

Garage Experts Of Sacramento

5.00(
25
)
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

We provide professional installation of commercial and residential epoxy flooring and storage solutions. Our service area stretches from North of Lake Tahoe to areas in and around San Jose and Santa Cruz. We travel for work!! We offer various types of lifetime warrantied epoxy flooring (multi-layer build-ups of "speckled" and metallic fleck) and lifetime warrantied cabinetry, slat wall and overhead racks. coatings and metallic fleck suspended in clear epoxy). Garage Experts has an enormous client base of garage makeover customers. In addition, we provide concrete makeovers (Capping, Stamping, Staining, Resurfacing, Etching, etc). We can provide unique, durable custom counter tops too.

"From start to finish it was a very pleasant experience. The workers who came out to a simple the cabinets and put on the Apoxsee floor were very professional and courteous. I would highly recommend them to anybody who wants epoxy flooring or cabinets."

jay f on February 2021

We provide professional installation of commercial and residential epoxy flooring and storage solutions. Our service area stretches from North of Lake Tahoe to areas in and around San Jose and Santa Cruz. We travel for work!! We offer various types of lifetime warrantied epoxy flooring (multi-layer build-ups of "speckled" and metallic fleck) and lifetime warrantied cabinetry, slat wall and overhead racks. coatings and metallic fleck suspended in clear epoxy). Garage Experts has an enormous client base of garage makeover customers. In addition, we provide concrete makeovers (Capping, Stamping, Staining, Resurfacing, Etching, etc). We can provide unique, durable custom counter tops too.

"From start to finish it was a very pleasant experience. The workers who came out to a simple the cabinets and put on the Apoxsee floor were very professional and courteous. I would highly recommend them to anybody who wants epoxy flooring or cabinets."

jay f on February 2021

Avatar for B A Morrison

B A Morrison

4.77(
79
)

B A Morrison

4.77(
79
)
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers

B.A. Morrison is a family-owned Heating, Ventilation, Air-Conditioning (HVAC) and General Construction company. We have been in business since 1990 and are fully insured and bonded. Our employees are experienced, trustworthy, and honest tradesmen. We are ready to meet your needs in a timely scheduled manner, to your satisfaction, and at a fair price. We offer free estimates for regularly scheduled maintenance of your HVAC equipment, new and replacement HVAC equipment installation, and your general construction needs. Please consider our service, installation, replacement, or home improvement and remodeling services the next time you have a need for your residential or commercial building.

B.A. Morrison is a family-owned Heating, Ventilation, Air-Conditioning (HVAC) and General Construction company. We have been in business since 1990 and are fully insured and bonded. Our employees are experienced, trustworthy, and honest tradesmen. We are ready to meet your needs in a timely scheduled manner, to your satisfaction, and at a fair price. We offer free estimates for regularly scheduled maintenance of your HVAC equipment, new and replacement HVAC equipment installation, and your general construction needs. Please consider our service, installation, replacement, or home improvement and remodeling services the next time you have a need for your residential or commercial building.

Ned Clyde Construction Inc

4.84(
68
)

Ned Clyde Construction Inc

4.84(
68
)
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers

Foundation and leveling specialists serving the entire bay area. Licensed, bonded and insured with 30 years of experience. We have licensed geologists, civil and geotechnical engineers on staff, so there's generally no need for outside consultants. Please call the office at 925-689-5411 to talk to an engineer and schedule an appointment.

"Engineer responded within my time frame. He provided the report I needed quickly."

Stephen S on August 2018

Foundation and leveling specialists serving the entire bay area. Licensed, bonded and insured with 30 years of experience. We have licensed geologists, civil and geotechnical engineers on staff, so there's generally no need for outside consultants. Please call the office at 925-689-5411 to talk to an engineer and schedule an appointment.

"Engineer responded within my time frame. He provided the report I needed quickly."

Stephen S on August 2018

Avatar for Morgan Construction

Morgan Construction

5.00(
50
)

Morgan Construction

5.00(
50
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

At Morgan Construction we strive to create a quality customer experience, helping our homeowners achieve their goals with a budget minded approach. Our focus on quality, craftsmanship and attention to detail is evident in our work. Our extensive, hands-on industry knowledge and creative vision allows us to make recommendations, becoming a true resource for our customers as they are challenged with decisions. Our customer base includes both residential and commercial construction. Morgan Construction sub contracts out all specialty trades to licensed and insured sub contractors that we have a long term trusting working relationships with. Let us help you realize your vision.

"Our house had significant water damage from the heavy rain season so we called a few contractors for assessment and estimates. Dan spent nearly two hours with us, patiently and thoroughly answering all of our questions, providing direct and honest advice, and ultimately helping us decide on our best course of action. He and his experienced team of subcontractors replaced all of our windows and sliding doors, replaced our wood siding with new stucco (including new building paper and plywood sheathing), installed new insulation and drywall, and handled all of the interior painting. Dan was readily available via text or call and was much more than just a project manager. He was extremely hands-on often at the house working side by side with his subcontractors, especially carpentry work for window framing. We are pleased with the end result and highly recommend Morgan Construction to anyone looking for high quality work and a trusted advisor."

Jeff L on April 2024

At Morgan Construction we strive to create a quality customer experience, helping our homeowners achieve their goals with a budget minded approach. Our focus on quality, craftsmanship and attention to detail is evident in our work. Our extensive, hands-on industry knowledge and creative vision allows us to make recommendations, becoming a true resource for our customers as they are challenged with decisions. Our customer base includes both residential and commercial construction. Morgan Construction sub contracts out all specialty trades to licensed and insured sub contractors that we have a long term trusting working relationships with. Let us help you realize your vision.

"Our house had significant water damage from the heavy rain season so we called a few contractors for assessment and estimates. Dan spent nearly two hours with us, patiently and thoroughly answering all of our questions, providing direct and honest advice, and ultimately helping us decide on our best course of action. He and his experienced team of subcontractors replaced all of our windows and sliding doors, replaced our wood siding with new stucco (including new building paper and plywood sheathing), installed new insulation and drywall, and handled all of the interior painting. Dan was readily available via text or call and was much more than just a project manager. He was extremely hands-on often at the house working side by side with his subcontractors, especially carpentry work for window framing. We are pleased with the end result and highly recommend Morgan Construction to anyone looking for high quality work and a trusted advisor."

Jeff L on April 2024

Avatar for Vital Restoration

Vital Restoration

4.82(
22
)

Vital Restoration

4.82(
22
)
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers

24 HR. EMERGENCY SERVICES & OPERATING 365 DAYS A YEAR -----CERTIFICATION----- The Clean Trust (Formally IICRC) Certified Frim #119249, Trauma Scene Waste Management Practitioner ID# TSW 329, US EPA Lead-Safe Certified Firm #NAT-22167-1, Business License #100793 -----REVIEWS----- Better Business Bureau Member Since 2007 Grade A+, Yelp 5 Stars -----BUSINESS-----18 Employees, Fleet of Service Vehicles, The Clean Trust Certified Technicians using Ultra Modern Equipment, Use sub-contractors infrequently, however we have a database of reliable partners we recommend -----BILLING----- We offer FREE Estimates Monday - Friday from 9AM - 4PM, Cost is determined based on services provided, Billing is processed after Customer certifies the job is completed & satisfied, We offer affordable interest free payment plans. -----COST EFFECTIVE-----We are not only dedicated to being the greatest service company available, but also making sure the costs are at least 20% below the industry standard. We want to be sure your troubles are not compounded after an unforeseen damage to your property by an inflated invoice. Although we may meet you for the first time on the worst day of your life, we will do whatever it takes to quickly turn a chaotic circumstance into a situation in which you have a plan in place to restore your property to its pre-loss condition. -----CONTACT US----- You may contact us by e-mail, fax, telephone or call our toll free number 1(855) 3 - RESTORE

24 HR. EMERGENCY SERVICES & OPERATING 365 DAYS A YEAR -----CERTIFICATION----- The Clean Trust (Formally IICRC) Certified Frim #119249, Trauma Scene Waste Management Practitioner ID# TSW 329, US EPA Lead-Safe Certified Firm #NAT-22167-1, Business License #100793 -----REVIEWS----- Better Business Bureau Member Since 2007 Grade A+, Yelp 5 Stars -----BUSINESS-----18 Employees, Fleet of Service Vehicles, The Clean Trust Certified Technicians using Ultra Modern Equipment, Use sub-contractors infrequently, however we have a database of reliable partners we recommend -----BILLING----- We offer FREE Estimates Monday - Friday from 9AM - 4PM, Cost is determined based on services provided, Billing is processed after Customer certifies the job is completed & satisfied, We offer affordable interest free payment plans. -----COST EFFECTIVE-----We are not only dedicated to being the greatest service company available, but also making sure the costs are at least 20% below the industry standard. We want to be sure your troubles are not compounded after an unforeseen damage to your property by an inflated invoice. Although we may meet you for the first time on the worst day of your life, we will do whatever it takes to quickly turn a chaotic circumstance into a situation in which you have a plan in place to restore your property to its pre-loss condition. -----CONTACT US----- You may contact us by e-mail, fax, telephone or call our toll free number 1(855) 3 - RESTORE

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Basement Waterproofing questions, answered by experts

The most flood-resistant materials you can count on in a flood scenario are concrete, closed-cell insulation, foam insulation (also known as expandable foam), pressure-treated wood, marine-grade plywood, and ceramic tile. When a material is flood-resistant, it can withstand direct contact with floodwater for at least 72 hours without being significantly damaged.

It’s not safe to live in a house with water damage until a trained professional gives you the all-clear to return. Mold can grow within one to two days after water damage and weaken your home’s structural integrity. Always have your home inspected after water damage to ensure it’s safe to live in.

Egress windows or doors are required in finished basements to meet safety and building codes. If your basement is unfinished and used as a storage space, egress windows are not required, but anything considered a habitable space must have an additional point of egress in addition to the stairs.

Mold and mildew are always a primary risk with any water damage, but it’s not guaranteed that mold will grow. The chances of mold growth are dependent on many factors, such as the severity of the damage and how quickly the area was cleaned up and dried out—that’s why responding to water damage immediately is imperative. If you suspect you have mold and mildew growth, you should talk to a local mold removal expert .

Mold can grow anywhere in your home where there’s moisture that doesn’t dry out, usually in areas that are either not ventilated properly or where moisture gathers continuously. Insulation, drywall, and foundations typically provide mold with areas to grow if moisture is present and does not have a chance to dry out. Some of the most common areas in a home for mold growth include:

  • Attic

  • Walls

  • Bathroom

  • Crawlspace

  • Basement

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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