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Verified Reviews for Foundation Repair pros in Islandia, NY
*The Angi rating for Foundation Repair companies in Islandia, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Foundation Repair needs.
*The HomeAdvisor rating for Foundation Repair companies in Islandia, NY is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Foundation Repair needs.
Last update on November 30, 2025
Find Foundation repair specialists in Islandia

HM Construction Group, Inc. (Long Island Handyman Group)
HM Construction Group, Inc. (Long Island Handyman Group)
HM Construction Group specializes in home remodeling, construction, property management, handyman tasks and repairs. We do all residential and commercial contracting, from trim to odd jobs. No job is too small or too big. We're a locally owned and operated company with many years of construction and handyman experience. We value honesty and integrity in all aspects of our business. We specialize in handyman work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!
"Eddie was great to work with! We had a limited time frame to adhere to town inspections and Eddie and his team knew exactly what we needed and quickly got the job done. The results were great and even the inspector acknowledged the impressive repair. They were able to put a knocked out garage wall back on the foundation and repair the interior dry wall. I would recommend this company for any professional contract work due to their reasonable price, ease to work with and quality of work."
Virginia K on October 2025
HM Construction Group specializes in home remodeling, construction, property management, handyman tasks and repairs. We do all residential and commercial contracting, from trim to odd jobs. No job is too small or too big. We're a locally owned and operated company with many years of construction and handyman experience. We value honesty and integrity in all aspects of our business. We specialize in handyman work and a variety of related service and repair projects. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships with our clients and guarantee your satisfaction!
"Eddie was great to work with! We had a limited time frame to adhere to town inspections and Eddie and his team knew exactly what we needed and quickly got the job done. The results were great and even the inspector acknowledged the impressive repair. They were able to put a knocked out garage wall back on the foundation and repair the interior dry wall. I would recommend this company for any professional contract work due to their reasonable price, ease to work with and quality of work."
Virginia K on October 2025

Long Hill Masonry Corp
Long Hill Masonry Corp
**We have now expanded our Foundation Services**Long Hill Masonry has been providing a tradition of expert craftsmanship, quality and service for over 30 years. The company is owned and operated by Joseph Tavella, who himself comes from generations of masons. It is our goal to achieve the highest standard of quality in every project. We guarantee our workmanship for one full year, and most projects are payable upon completion of job take a look at our website at www.longhillmasonry.com
"Joe Cam down to do an estimate and he was very knowledgeable. The Quote was Fair and I had hired them to do the job. They came on time and the job came out great. I would recommend Long Hill to everyone I know"
Christian G on August 2023
**We have now expanded our Foundation Services**Long Hill Masonry has been providing a tradition of expert craftsmanship, quality and service for over 30 years. The company is owned and operated by Joseph Tavella, who himself comes from generations of masons. It is our goal to achieve the highest standard of quality in every project. We guarantee our workmanship for one full year, and most projects are payable upon completion of job take a look at our website at www.longhillmasonry.com
"Joe Cam down to do an estimate and he was very knowledgeable. The Quote was Fair and I had hired them to do the job. They came on time and the job came out great. I would recommend Long Hill to everyone I know"
Christian G on August 2023

Zavza Seal, LLC
Zavza Seal, LLC
Zavza Seal is an experienced high end general contracting firm with a passion for delivering excellence. Serving Long Island communities including Suffolk, and Nassau counties. We are a one-stop shop construction company that specializes in the following: waterproofing basements, paving and sealing driveways and garages, waterproofing parking structure and concrete commercial roofs. Concrete Swimming pool buildout, Stone paving and tuck-pointing work. If you are considering any type of waterproofing project and concrete work we are here to help and can provide valuable, time-saving advice. We also specialize in waterproof concrete for professional and residential use called Basecrete. Call today for a free estimate!
"I hired Zavza Seal to waterproof my basement and they did an exceptional job! The team was professional, thorough and went the extra mile to ensure everything was done perfectly. I'm happy with their work and highly recommend them to anyone!"
Levan c on September 2024
Zavza Seal is an experienced high end general contracting firm with a passion for delivering excellence. Serving Long Island communities including Suffolk, and Nassau counties. We are a one-stop shop construction company that specializes in the following: waterproofing basements, paving and sealing driveways and garages, waterproofing parking structure and concrete commercial roofs. Concrete Swimming pool buildout, Stone paving and tuck-pointing work. If you are considering any type of waterproofing project and concrete work we are here to help and can provide valuable, time-saving advice. We also specialize in waterproof concrete for professional and residential use called Basecrete. Call today for a free estimate!
"I hired Zavza Seal to waterproof my basement and they did an exceptional job! The team was professional, thorough and went the extra mile to ensure everything was done perfectly. I'm happy with their work and highly recommend them to anyone!"
Levan c on September 2024
Basement Man
Basement Man
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
Napolitano Brothers Contracting, Inc.
Napolitano Brothers Contracting, Inc.
Family Owned and Operated Since 1984 Napolitano Brothers Contracting, Inc. has been providing exceptional Masonry, Landscape Design, and Waterproofing solutions to customers all over Long Island.
"James and Mike also did the foundation and patio work as well as walls and steps. They are simply the most professional yet friendly people to to do business with. Their attention to detail and quality of execution is simply amazing. Highly recommended!!!"
Andy S on October 2024
Family Owned and Operated Since 1984 Napolitano Brothers Contracting, Inc. has been providing exceptional Masonry, Landscape Design, and Waterproofing solutions to customers all over Long Island.
"James and Mike also did the foundation and patio work as well as walls and steps. They are simply the most professional yet friendly people to to do business with. Their attention to detail and quality of execution is simply amazing. Highly recommended!!!"
Andy S on October 2024

ZAMAIA INC.
ZAMAIA INC.
We are dedicated to providing our clients with the very best in installation and repair for your concrete and masonry needs. With over nine years of industry experience, we specialize in a variety of residential and commercial brick, stone and concrete work. We take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.
"Excellent job! They are professional, neat, and polite. I highly recommend them. Carol M."
Carol M on October 2021
We are dedicated to providing our clients with the very best in installation and repair for your concrete and masonry needs. With over nine years of industry experience, we specialize in a variety of residential and commercial brick, stone and concrete work. We take pride in the attention to detail put into each of the projects we're involved with. We're known for our quality work and the integrity of our business. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.
"Excellent job! They are professional, neat, and polite. I highly recommend them. Carol M."
Carol M on October 2021

FASCILLA MASONRY INC.
FASCILLA MASONRY INC.
Fascilla Masonry s a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!
"“I had an outstanding experience with Fascilla Masonry Inc. From start to finish, their team was professional, reliable, and highly skilled. They went above and beyond to ensure that the job was done right, with attention to detail and craftsmanship that truly stood out. Whether it was the masonry work on my patio or the repairs to the stonework on my home, they handled everything with care and precision. The team was always punctual and kept the work area clean and organized. I highly recommend Fascilla Masonry Inc. to anyone in need of top-notch masonry services – they are the best in the business!”"
kevin m on March 2025
Fascilla Masonry s a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!
"“I had an outstanding experience with Fascilla Masonry Inc. From start to finish, their team was professional, reliable, and highly skilled. They went above and beyond to ensure that the job was done right, with attention to detail and craftsmanship that truly stood out. Whether it was the masonry work on my patio or the repairs to the stonework on my home, they handled everything with care and precision. The team was always punctual and kept the work area clean and organized. I highly recommend Fascilla Masonry Inc. to anyone in need of top-notch masonry services – they are the best in the business!”"
kevin m on March 2025

ProSeal Waterproofing
ProSeal Waterproofing
I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!
"Alex was amazing!! We had a crack in our foundation that another company attempted to repair numerous times. We were fortunate enough to hear about ProSeal and I am happy to report not only did Alex repair the crack to near perfection but the work was done timely, neatly and his customer service skills are top notch. I would HIGHLY recommend ProSeal for all of your foundation needs."
Angela M on October 2025
I take pride in my quality craftsmanship. We are owner operated, and believe in building long-term relationships with our clients by delivering honesty along with exceptional work. We pride our company on reliability, great communication, integrity, and customer service. We are experts in our trade and will do our best to keep you as educated as we can on your particular project. Give us a call today! We look forward to working with you!
"Alex was amazing!! We had a crack in our foundation that another company attempted to repair numerous times. We were fortunate enough to hear about ProSeal and I am happy to report not only did Alex repair the crack to near perfection but the work was done timely, neatly and his customer service skills are top notch. I would HIGHLY recommend ProSeal for all of your foundation needs."
Angela M on October 2025

SAP CONCRETE & MASONRY, INC
SAP CONCRETE & MASONRY, INC
SAP Concrete & Masonry Inc. Is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have hands on experience, to provide innovative Ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are Involved with. Please feel free to contact us today! 631-793-2902
"They did a very good job and always keep the site clean I will use them on my next project for sure."
Karen M on July 2024
SAP Concrete & Masonry Inc. Is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have hands on experience, to provide innovative Ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are Involved with. Please feel free to contact us today! 631-793-2902
"They did a very good job and always keep the site clean I will use them on my next project for sure."
Karen M on July 2024

Long Hill Masonry Corp.
Long Hill Masonry Corp.
You Can Call us Directly at (631) 874-9701 or text (631) 903-1093 or email us at [email protected] - Long Hill Masonry Corp., is a company that strives for excellence and brings experience and professionalism to every project, large or small. With over 40 years of combined experience, we maintain a standard of excellence that will shine through on your unique project. Whether you are replacing or repairing concrete or masonry for a patio or driveway, Long Hill Masonry Corp., will not hesitate to show you that our firm is the only one you need call. We are family owned and operated and the person you begin dealing with will be the same person there for you at the end of the job. Our reputable staff does not shy away from accountability. Call us today for a free, professional estimate!
"I was so happy the job was done quicker than I expected. It seems that lately there's a long, long wait for anything to get accomplished. The foundation is perfect for the gazebo I ordered. Yes, I will remember this company and if I need any other outside work I will definitelly hire them again. Very satisfied."
May W on October 2023
You Can Call us Directly at (631) 874-9701 or text (631) 903-1093 or email us at [email protected] - Long Hill Masonry Corp., is a company that strives for excellence and brings experience and professionalism to every project, large or small. With over 40 years of combined experience, we maintain a standard of excellence that will shine through on your unique project. Whether you are replacing or repairing concrete or masonry for a patio or driveway, Long Hill Masonry Corp., will not hesitate to show you that our firm is the only one you need call. We are family owned and operated and the person you begin dealing with will be the same person there for you at the end of the job. Our reputable staff does not shy away from accountability. Call us today for a free, professional estimate!
"I was so happy the job was done quicker than I expected. It seems that lately there's a long, long wait for anything to get accomplished. The foundation is perfect for the gazebo I ordered. Yes, I will remember this company and if I need any other outside work I will definitelly hire them again. Very satisfied."
May W on October 2023
The Islandia, NY homeowners’ guide to foundation repairs
From average costs to expert advice, get all the answers you need to get your job done.

A foundation for a new-build home averages around $11,000. Find out all the factors that affect the cost of a foundation and how to save money.

A bowing basement wall needs immediate repair. Learn how much it costs to repair a bowing basement wall and what factors can affect the final price tag.

Unstable or sinking foundations require comprehensive and expensive solutions. Learn about foundation underpinning costs in this guide to set your budget.

When buying a home, some issues are OK to overlook—but for structural damage, it's best to know when to walk away from foundation issues.

Knowing how to hire a foundation repair contractor can be the difference between a permanent fix and more problems. Learn what to look for in this guide.

Discover eight home foundation types for home construction, their functions, benefits and drawbacks, and how to identify each kind.
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