Top-rated foundation repair specialists.

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    Average homeowner rating
  • Verified reviews icon39
    Verified foundation repairs reviews

Find Foundation repair specialists in Sag Harbor

Avatar for Twin Fork Waterproofing, LLC

Twin Fork Waterproofing, LLC

4.32(
27
)
Approved Pro

Twin Fork Waterproofing, LLC

4.32(
27
)
Approved Pro
Customers say: Quick response
48 years of experience
Free onsite estimate

For over 30 years Twin Fork Waterproofing, Inc. has been a family owned and operated business located on the East End of Long Island. We have been the #1 choice of thousands of homeowners and businesses on the North and South Forks and Shelter Island for basement waterproofing and mold disinfection, safe insulation, foundation repair, drainage systems, dehumidifiers, remediation of rodent feces, etc. Twin Fork Waterproofing, Inc. Uses all environmentally safe mildicides and disinfections for your safety and guarantees our work. Call or text us today for a free evaluation.

"Just excellent start to finish - I’ve been battling water in my basement for years and finally have no more anxiety during a heavy rainstorm. The new humidifier and waterproofed basement was money well spent - and the work and care from this top notch team was outstanding. Highly recommend them. Quality work at a fair price."

Marian Z on May 2025

For over 30 years Twin Fork Waterproofing, Inc. has been a family owned and operated business located on the East End of Long Island. We have been the #1 choice of thousands of homeowners and businesses on the North and South Forks and Shelter Island for basement waterproofing and mold disinfection, safe insulation, foundation repair, drainage systems, dehumidifiers, remediation of rodent feces, etc. Twin Fork Waterproofing, Inc. Uses all environmentally safe mildicides and disinfections for your safety and guarantees our work. Call or text us today for a free evaluation.

"Just excellent start to finish - I’ve been battling water in my basement for years and finally have no more anxiety during a heavy rainstorm. The new humidifier and waterproofed basement was money well spent - and the work and care from this top notch team was outstanding. Highly recommend them. Quality work at a fair price."

Marian Z on May 2025


Grady's Painting Plastering/Construction

4.56(
54
)
Approved Pro

Grady's Painting Plastering/Construction

4.56(
54
)
Approved Pro
Customers say: Quality work
56 years of experience
Free onsite estimate

WE SPECIALIZE IN THE HISTORICAL REPAIR AND RESTORATIONS FOR INTERIOR AND EXTERIOR. WE WORK THE WHOLE STATE OF NEW JERSEY, MARYLAND, WASHINGTON DC, CONNECTICUT, VIRGINA AND MASSACHUSETTS. WE ARE LICENSED AND INSURED IN ALL STATES. WE ARE WILLING TO TRAVEL, ANY JOB SMALL OR LARGE. CONSULTATION AND TRANSPORTATION FEES WILL APPLY. WE DO WINDOW REPAIR. PLASTER REPAIRS. AND ALL MASONRY REPAIRS

"We had cracks in the dyed mortar of the bricks above our garage. Grady took the time to match the color, even with the color having aged 10 years, and you would not even be able to tell that there was new mortar. If your project is anything like ours, you will not be disappointed."

Bradley S on August 2024

WE SPECIALIZE IN THE HISTORICAL REPAIR AND RESTORATIONS FOR INTERIOR AND EXTERIOR. WE WORK THE WHOLE STATE OF NEW JERSEY, MARYLAND, WASHINGTON DC, CONNECTICUT, VIRGINA AND MASSACHUSETTS. WE ARE LICENSED AND INSURED IN ALL STATES. WE ARE WILLING TO TRAVEL, ANY JOB SMALL OR LARGE. CONSULTATION AND TRANSPORTATION FEES WILL APPLY. WE DO WINDOW REPAIR. PLASTER REPAIRS. AND ALL MASONRY REPAIRS

"We had cracks in the dyed mortar of the bricks above our garage. Grady took the time to match the color, even with the color having aged 10 years, and you would not even be able to tell that there was new mortar. If your project is anything like ours, you will not be disappointed."

Bradley S on August 2024


Basement Man

5.00(
15
)
Approved Pro

Basement Man

5.00(
15
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
18 local quotes requested

WHY--THIS IS A JOB FOR BASEMENT MAN!!! Your locally owned and operated Basement Waterproofing Specialist. Why am I YOUR Basement Waterproofing Specialist? Because over a 38 year period, I've built over 110 customer homes all over Long Island and I know Basements! We stand behind and guarantee all of our work, so give us a call anytime for a free estimate.

"Things went great I'd hire him again"

John R on May 2025

WHY--THIS IS A JOB FOR BASEMENT MAN!!! Your locally owned and operated Basement Waterproofing Specialist. Why am I YOUR Basement Waterproofing Specialist? Because over a 38 year period, I've built over 110 customer homes all over Long Island and I know Basements! We stand behind and guarantee all of our work, so give us a call anytime for a free estimate.

"Things went great I'd hire him again"

John R on May 2025


Avatar for The Perfect Interior

The Perfect Interior

5.00(
1
)

The Perfect Interior

5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Perfect Interior LC specializes in interior renovations of all scales, focusing on energy efficiency to comply with NYC’s Local Law 97. With over 10 years of experience in industrial energy efficiency, we enhance comfort without increasing costs. Our expert team designs, manages, and ensures measurable success in every project, guiding clients through energy-saving steps that scale effectively. Partnering with industry allies, we bring innovative solutions to NYC, creating beautiful, efficient spaces that align with your vision. Contact us today to start your transformation!

"Professionalism and good service."

Marcela G on November 2024

Perfect Interior LC specializes in interior renovations of all scales, focusing on energy efficiency to comply with NYC’s Local Law 97. With over 10 years of experience in industrial energy efficiency, we enhance comfort without increasing costs. Our expert team designs, manages, and ensures measurable success in every project, guiding clients through energy-saving steps that scale effectively. Partnering with industry allies, we bring innovative solutions to NYC, creating beautiful, efficient spaces that align with your vision. Contact us today to start your transformation!

"Professionalism and good service."

Marcela G on November 2024


And 1 Masonry

No reviews yet

And 1 Masonry

No reviews yet
Free onsite estimate

And 1 Masonry has been in business for 25 years. We specialize in all types of concrete work. Foundations, driveways, sidewalks, anything with concrete we do. We also do excavations, land clearing and clean ups, demolition and all drainage work.

And 1 Masonry has been in business for 25 years. We specialize in all types of concrete work. Foundations, driveways, sidewalks, anything with concrete we do. We also do excavations, land clearing and clean ups, demolition and all drainage work.



Avatar for Cardinal Concrete & Paving

Cardinal Concrete & Paving

No reviews yet

Cardinal Concrete & Paving

No reviews yet
3 years of experience

Cardinal Concrete & Paving Inc. is a concrete and asphalt contractor specializing in poured concrete, asphalt and masonry. We offer stamped concrete, pavers, patios, stairs, retaining walls, foundations and foundation extensions, and much more. Call us for your free estimate satisfaction guaranteed.

Cardinal Concrete & Paving Inc. is a concrete and asphalt contractor specializing in poured concrete, asphalt and masonry. We offer stamped concrete, pavers, patios, stairs, retaining walls, foundations and foundation extensions, and much more. Call us for your free estimate satisfaction guaranteed.


Avatar for homexpertsplus.com

homexpertsplus.com

No reviews yet

homexpertsplus.com

No reviews yet
Emergency services offered

Homexpertsplus.com, is a General Construction company from Suffolk County, New York. We speciallize in Total Home Renovations, as well as roofing, siding, windows & doors, kitchens, bathrooms, we accept all major credit cards and offer 100% financing.

Homexpertsplus.com, is a General Construction company from Suffolk County, New York. We speciallize in Total Home Renovations, as well as roofing, siding, windows & doors, kitchens, bathrooms, we accept all major credit cards and offer 100% financing.


NYCMG

No reviews yet

NYCMG

No reviews yet
7 years of experience

“Your smallest job is our biggest concentration, your satisfaction is our achievement.” by President & CEO. Dear Sir / Madam, I would like to introduce you with our company, NYC MAPLE GROUP INC of Builder | Construction Team. We have been established to provide you with your best construction needs. We are here with excellent track record for the best customer satisfaction and never compromises on the quality of job and service that provided to the customer. Our team is ready to guide you with their best knowledge, ideas and experiences by keeping in constant touch with you and/or your company. Please feel free to keep in touch with us about any kind of construction job related queries. We would like to offer our service to you and/or to your company. We believe in keeping the customers happy and fully satisfied with products and services at a very competent price. We look forward to a wonderful relationship together and success for all concerned. Sincerely, AHF IFTI (President & CEO)

“Your smallest job is our biggest concentration, your satisfaction is our achievement.” by President & CEO. Dear Sir / Madam, I would like to introduce you with our company, NYC MAPLE GROUP INC of Builder | Construction Team. We have been established to provide you with your best construction needs. We are here with excellent track record for the best customer satisfaction and never compromises on the quality of job and service that provided to the customer. Our team is ready to guide you with their best knowledge, ideas and experiences by keeping in constant touch with you and/or your company. Please feel free to keep in touch with us about any kind of construction job related queries. We would like to offer our service to you and/or to your company. We believe in keeping the customers happy and fully satisfied with products and services at a very competent price. We look forward to a wonderful relationship together and success for all concerned. Sincerely, AHF IFTI (President & CEO)


"Ever and his crew were prompt and courteous. They were very detailed oriented and did an excellent job. I’m very pleased with the patio and irrigation system he constructed for me."

Ann N on August 2019

Nature Outdoor is founded by professionals with a focus on quality and fast response. We offer general landscaping installation and maintenance; irrigation installation and maintenance; patios; driveways; masonry.

"Ever and his crew were prompt and courteous. They were very detailed oriented and did an excellent job. I’m very pleased with the patio and irrigation system he constructed for me."

Ann N on August 2019

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Foundation Repair questions, answered by experts

Home foundations are designed to last a lifetime when properly constructed and well-maintained. A poured concrete slab can last 200 years, while concrete blocks can last 80 to 100 years. A pier foundation can last about 75 years. Brick or stone walls can last 100 years or more.

If your foundation repair claim gets denied, the first step is to carefully read over your policy and denial letter so you understand the reason for the denial. Then, gather evidence and documents that can support your case and appeal the denial with your insurance company. If your insurer does not eventually honor your claim, you may want to file a complaint with the insurance department in your state. In some cases, it may make sense to work with an attorney and file a lawsuit.

The best solution to fix a foundation crack in your basement floor depends on the underlying cause. If you just have hairline cracks from settlements that are no longer growing, the best option is to seal them with a crack sealant. If the cracks continue to grow, one edge rises above the other, or there are signs that water is getting in through the crack, a professional repair will be necessary. Depending on the root cause, your professional may employ foundation underpinning or some other type of stabilization, seal the cracks, or install a drainage system.

Most of the time, normal foundation settling will present as thin cracks in the foundation and minor creaks in the floorboards. In contrast, you can identify foundation issues by wide or uneven foundation cracks, horizontal or step-shaped gaps on the foundation wall, or cracks that go around corners of your foundation. Foundation problems can also cause changes in your living area, like increased humidity, uneven or sloping floors, nail pops in drywall, countertops pulling away from the wall, and windows and doors getting stuck. When in doubt, call in a professional to identify the underlying cause.

Yes, thicker concrete is less likely to crack. The thicker the concrete is, the less susceptible it is to extreme changes in weather conditions that often cause concrete to crack or chip. If you’re unable to install a thicker concrete driveway for any reason, you can also ask your professional to install more rebar or wire mesh to provide greater strength and better resilience to damage.

The Sag Harbor, NY homeowners’ guide to foundation repairs

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