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Find Basement leak repair pros in Ontario

Avatar for So Cal Builders & Design Inc

So Cal Builders & Design Inc

4.60(
223
)
Approved Pro

So Cal Builders & Design Inc

4.60(
223
)
Approved Pro
Customers say: Quality work
901 local quotes requested
43 years of experience

So Cal Builders & Design have been helping the homes throughout California look perfect one nail and brick at a time! With the best prices and highest standard of service, we can deliver the kitchen or bathroom of your dreams on time and on budget! Our staff of trained technicians will build your addition or remodel to your specifications; using only the finest quality materials and the most up-to-date building procedures. We also have in house masonry service as well as perform a number of other services such as plumbing, lighting, painting, patios, and much more. Because we do it all ourselves, we eliminate miscommunication, stress and down time. We don’t use outside contractors or fancy gimmicks to get our customers. We combine new and modern building practices with tried and true hard work to deliver a work of art every time and that is why our customers make us #1. Request Your Free Estimate Voice Star: (888) 284-9122.

"Very good company . I am very satisfied with their professionalism . Highly recommended this company"

Leta W on December 2025

So Cal Builders & Design have been helping the homes throughout California look perfect one nail and brick at a time! With the best prices and highest standard of service, we can deliver the kitchen or bathroom of your dreams on time and on budget! Our staff of trained technicians will build your addition or remodel to your specifications; using only the finest quality materials and the most up-to-date building procedures. We also have in house masonry service as well as perform a number of other services such as plumbing, lighting, painting, patios, and much more. Because we do it all ourselves, we eliminate miscommunication, stress and down time. We don’t use outside contractors or fancy gimmicks to get our customers. We combine new and modern building practices with tried and true hard work to deliver a work of art every time and that is why our customers make us #1. Request Your Free Estimate Voice Star: (888) 284-9122.

"Very good company . I am very satisfied with their professionalism . Highly recommended this company"

Leta W on December 2025


Avatar for Groundworks

Groundworks

3.55(
20
)
Approved Pro

Groundworks

3.55(
20
)
Approved Pro
Customers say: Super punctual
54 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 Sentri Homes

Sentri Homes

New on AngiNew on Angi
Approved Pro

Sentri Homes

New on AngiNew on Angi
Approved Pro
305 local quotes requested
2 years of experience

Sentri Homes is a full-service contractor delivering high-end home additions, whole-home remodels, new custom builds, luxury kitchens, structural framing, roof replacements, and every major renovation. We assign a dedicated project manager to every job, deliver meticulous craftsmanship with clear communication, and back our work with an industry-leading warranty to ensure complete peace of mind on your largest investments. Our in-house team of licensed builders and master craftsmen consistently earns 5-star reviews by turning big visions into stunning, high-value homes—when you need one trusted partner who truly does it all, we’re the proven choice.

Sentri Homes is a full-service contractor delivering high-end home additions, whole-home remodels, new custom builds, luxury kitchens, structural framing, roof replacements, and every major renovation. We assign a dedicated project manager to every job, deliver meticulous craftsmanship with clear communication, and back our work with an industry-leading warranty to ensure complete peace of mind on your largest investments. Our in-house team of licensed builders and master craftsmen consistently earns 5-star reviews by turning big visions into stunning, high-value homes—when you need one trusted partner who truly does it all, we’re the proven choice.


Brian Ortega

5.00(
2
)
Approved Pro

Brian Ortega

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 years of experience

Brian Ortega is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Quick response, good at problem solving and very thorough."

Michelle X on March 2020

Brian Ortega is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

"Quick response, good at problem solving and very thorough."

Michelle X on March 2020


Avatar for Alpha Structural, Inc.

Alpha Structural, Inc.

4.67(
231
)
Approved Pro

Alpha Structural, Inc.

4.67(
231
)
Approved Pro
Customers say: Super punctual
240 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 Oshri Construction

Oshri Construction

5.00(
3
)
Approved Pro

Oshri Construction

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
370 local quotes requested

**Call us today for a FREE ESTIMATE!** With over 30 years of experience, you're going to fall in love with our craftsmanship and design of your project. We specialize in New Construction, Gazebo Building, Custom Home Building, Home Renovation, Construction & Remodeling.

"They did an excellent job. The quality is outstanding. They pay attention to every little detail. They were very friendly, and accommodating to our wishes. They were very punctual, hard working, and cleaned up after each day. The kept the dust down to a minimum to the rest of the house. I can highly recommend Oshri Construction for anyone's next project."

Joe L on November 2020

**Call us today for a FREE ESTIMATE!** With over 30 years of experience, you're going to fall in love with our craftsmanship and design of your project. We specialize in New Construction, Gazebo Building, Custom Home Building, Home Renovation, Construction & Remodeling.

"They did an excellent job. The quality is outstanding. They pay attention to every little detail. They were very friendly, and accommodating to our wishes. They were very punctual, hard working, and cleaned up after each day. The kept the dust down to a minimum to the rest of the house. I can highly recommend Oshri Construction for anyone's next project."

Joe L on November 2020


Avatar for LAT Construction Inc.

LAT Construction Inc.

5.00(
3
)

LAT Construction Inc.

5.00(
3
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

At LAT Construction Inc we specialize in ADU's, new construction, and remodeling's. With our design and build team we can make any dream a reality. We offer free estimates to all potential clients. We will strive to implement a long term relationship with our clients.

"The work looks great, especially the painting and new framing. Luis was very communicative and I definitely plan to hire his team again."

Lily M on June 2024

At LAT Construction Inc we specialize in ADU's, new construction, and remodeling's. With our design and build team we can make any dream a reality. We offer free estimates to all potential clients. We will strive to implement a long term relationship with our clients.

"The work looks great, especially the painting and new framing. Luis was very communicative and I definitely plan to hire his team again."

Lily M on June 2024


Avatar for E.MGeneralConstruction

E.MGeneralConstruction

No reviews yet

E.MGeneralConstruction

No reviews yet
Free onsite estimate

I'm a General contractor we do painting, plumbing, drywall, roofing,flooring,concrete, fencing, patios,ADU's,electrical, full remodel, carpentry I'm cost efficient and I take passion In the details of my work I've got more than 10 plus years experience I am owner operated

I'm a General contractor we do painting, plumbing, drywall, roofing,flooring,concrete, fencing, patios,ADU's,electrical, full remodel, carpentry I'm cost efficient and I take passion In the details of my work I've got more than 10 plus years experience I am owner operated


Avatar for Omniscape Construction Inc.

Omniscape Construction Inc.

5.00(
4
)

Omniscape Construction Inc.

5.00(
4
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Your local owner-operated contractor in IE/OC/LA area! We focus on residential and building services, kitchen & bathroom remodeling, ADU's, additions, renovations, water damage, and much more! We provide quality construction for every project all while offering affordable prices! We are licensed and bonded!

"I can’t say enough about Omar and his crew. The work was done on time, on budget, and was excellent. From the steam shower to the gourmet kitchen with the pop up windows to the 4 outside decks and custom windows and doors my home was transformed. The new 800 sqft. 3 car garage apartment he built for me was gorgeous. I was so happy I got top dollar for that apartment. If you need anything omniscape is the place."

Jaime B on May 2024

Your local owner-operated contractor in IE/OC/LA area! We focus on residential and building services, kitchen & bathroom remodeling, ADU's, additions, renovations, water damage, and much more! We provide quality construction for every project all while offering affordable prices! We are licensed and bonded!

"I can’t say enough about Omar and his crew. The work was done on time, on budget, and was excellent. From the steam shower to the gourmet kitchen with the pop up windows to the 4 outside decks and custom windows and doors my home was transformed. The new 800 sqft. 3 car garage apartment he built for me was gorgeous. I was so happy I got top dollar for that apartment. If you need anything omniscape is the place."

Jaime B on May 2024


"I got 3 different price quotes for my new roof and J Mendoza Construction was the best one.The price was right and now I have a new roof. My wife is happy and I'm happy, thanks again."

Carlos E on February 2024

Family owned business with over 15 years of experience handling all your Remodeling needs, kitchen and bathroom, room additions, garage conversions.

"I got 3 different price quotes for my new roof and J Mendoza Construction was the best one.The price was right and now I have a new roof. My wife is happy and I'm happy, thanks again."

Carlos E on February 2024

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Basement Leak Repair questions, answered by experts

If your basement often leaks after heavy rain, it’s probably caused by hydrostatic pressure. When the ground is saturated with water, it can put pressure on the exterior of your home’s foundation, causing cracks in the basement wall and pushing water through any existing weak spots. Over time, hydrostatic pressure can cause structural damage to your home.

Walkout basements cost more than other kinds of basements, and can also increase your risk of leaks as well as a loss of insulation, leading to higher heating and cooling costs. Improperly installed walkout basements may lead to structural issues with your foundation, so ensure you’re working with a contractor who has extensive experience with this kind of basement.

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

When considering finishing your basement, take into account a few pros and cons:

Pros

  • Can increase the value of your home

  • Separate space from the rest of the house 

  • Customize and personalize the basement to suit your needs and style

  • Increase the amount of living space in your home

Cons

  • May not regain enough value to cover the cost of finishing

  • Lack of natural light if it’s below ground level

  • Moisture or flooding can cause costly damage

  • Installing plumbing and electrical can be messy and costly

Permits may be required for major repairs, structural work, or electrical and plumbing restoration after a flood. Check with your local building department to determine permit requirements and associated fees for your flooded basement cleanup project. Obtaining the correct permits helps ensure work is done safely and up to code.

The Ontario, CA homeowners’ guide to basement leak repair services

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