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TRUSTED BY COS COB, CT HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon79
    Verified house leveling services reviews

Top-Rated House leveling pros in Cos Cob - Updated Nov 2026

Avatar for Ron's Masonry
Ron's Masonry
5.0(
30
)
Concrete - Injection Leveling - MudjackingConcrete - Injection Leveling - Mudjacking - For BusinessConcrete Foundation - Repair

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1995

Emergency services offered

Small jobs welcome

"Ron and his assistant arrived on time to do some fall cleanup landscaping at my house. What would have taken me three days to do, plus hauling away the debris, took them under two hours. It was the very best money I ever spent - more so because I got to meet such lovely people, but also because they helped me a great deal. I will be calling them in the spring for a clean up and masonry work."
Walkway
Steps
Footing
Walk
Walk

+36

Response time1 day
Response rate86%
29 neighbors recently requested a quote
Avatar for Connecticut Basement Systems, Inc.
Connecticut Basement Systems, Inc.
4.3(
589
)
Concrete Foundation - RaiseConcrete Foundation - Repair

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1987

Free estimates

Warranties offered

"We moved into a lovely house with many unsuspected problems including a very wet basement back in Nov of 2017. I did much research to find the best outfit to fix the problem. Ct Basement was not the cheapest. In fact, they were the most expensive by far. But, they were also the yardstick every other company compared themselves to. The job cost us 19,300. And we had to wait weeks for the work to start. BUT, everything went perfectly. As soon as the old debris was removed, I was shocked to find that the garbage of the old walls and flooring they removed had black mold under it. And, with its removal, my wife’s athsma cleared up and left town! They did a beautiful job, were very polite and the new installed basement, new sump pump with back up battery, perimeter trench, flooring, etc., all is great. They put a lot of work and material in to do this job with very skilled workmen who worked very hard. Sometimes you get what you pay for."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+12

178 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Groundworks
Groundworks
4.9(
13
)
Concrete - Injection Leveling - MudjackingConcrete Foundation - RaiseConcrete Foundation - Repair+1 more

Serving Cos Cob, CT and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2025

Free estimates

Warranties offered

"The gentleman who came to my home were absolutely great! Explained everything and made sure I was happy with the work every step of the way. I was nervous in the beginning but my fear subsided after Robert Charlesworth, Marcelo largo, Isaiah belcher and Johnathon Lopez made for a great experience. The attention to detail and dust control, tapping off areas they felt I wouldn’t want getting dusty exceeded my expectations! Thank you for your hard work and kindness. Trucks looked awesome new as well as tools and equipment. Great job guys!!"
Foundation
Foundation
Foundation
Concrete
Concrete

+16

482 neighbors recently requested a quote
Avatar for AA Outdoor Services, LLC
AA Outdoor Services, LLC
3.9(
33
)
Concrete Foundation - RaiseConcrete Foundation - Repair

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1990

Free estimates

Small jobs welcome

"Vincent did an absolutely beautiful job on my cement and asphalt driveway. Their craftsmanship was top-notch. They finished the job quickly, and left the work area clean when they were not there. They stayed in touch throughout the process, and they take tremendous pride in their work. I have worked with hundreds of contractors over the years and these folks are among the very best and most reliable. Cannot say enough good things, also the prices were competitive, and they delivered a better quality of work than I would expect for a similar price."
Driveway in New Haven (West Haven)
Rear entrance and parking area (West Haven)
Rear entrance and parking area (West Haven)
Step repair (West Haven)
Step repair (West Haven)

+61

Response time9 hrs
Recommended by100%of homeowners
Avatar for Optimal Outdoor Solutions, LLC
Optimal Outdoor Solutions, LLC
5.0(
5
)
Concrete - Injection Leveling - MudjackingConcrete - Injection Leveling - Mudjacking - For Business

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Optimal Outdoor Solutions, LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests and make their concerns the basis of our business.

Before
After
8 neighbors recently requested a quote
Avatar for Prime Provision Construction
Prime Provision Construction
5.0(
1
)
Concrete Foundation - Repair

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"Excellent basement waterproofing service! The team was professional, knowledgeable, and worked extremely hard from start to finish. They explained everything clearly, repaired the problem areas, waterproofed the basement properly, and left everything clean when the job was completed. The difference has been amazing ? our basement is now dry and protected, even after heavy rain. Great workmanship, reliable service, and very fair pricing. I would highly recommend them to anyone needing basement waterproofing or foundation repair."
44 neighbors recently requested a quote
Sonart Construction Corp.
2.3(
7
)
Concrete - Injection Leveling - MudjackingConcrete - Injection Leveling - Mudjacking - For BusinessConcrete Foundation - Raise+1 more

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

Sonart Construction Corp. has over15 years of experience in providing a variety of exterior and interior renovation services. We provide services to Palm Beach, Broward and Miami-Dade Counties.. We specialize in Bathroom Remodeling, Kitchen Remodeling, Flooring and the list goes on. Customer satisfaction is what determines our success, which is why we take a hands-on approach and keep the customer informed through every phase of the project. When interacting with our company, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing, and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your renovation needs. Give us a call today!

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House Leveling FAQs, answered by experts

Concrete leveling is absolutely worth it if you have sunken concrete slabs and want to restore them to level, especially if the slab is part of your home foundation. Concrete leveling is less than half the price of replacing concrete sidewalks, patios, walkways, and pool decks, and it’s about a quarter of the cost of replacing a foundation. If you also treat the underlying problem, it can be a worthwhile and permanent solution.

It restores concrete, prevents replacement cost disruptions, reduces trip hazards, and provides stability at a lower cost.

Concrete leveling is not typically covered by insurance. In some cases where the shifting concrete is caused by a natural disaster or storm, you may be able to file an insurance claim if your policy specifically covers those circumstances. In most cases, though, you’ll pay out-of-pocket for concrete leveling.

Mudjacking typically takes 24 to 72 hours (one to three days) to dry and cure completely before you can resume normal use. The exact time can vary depending on the size of the project. Because the slurry mixture contains cement, it must fully harden to ensure that added weight from walking, furniture, or vehicles won't shift the concrete slab. A professional contractor can advise you on when the surface is safe to use. For comparison, if you use polyjacking instead, the polyurethane foam can dry in just a few minutes, but it's best to wait about an hour before use.

A sinking foundation can be lifted, most often by installing piers to re-level and support the weight of the house. Depending on the cause and extent of the sinking, other methods to lift a foundation include underpinning and mudjacking. Consult a foundation repair pro to determine the best way to lift your sinking foundation. 

The Cos Cob, CT homeowners’ guide to house leveling services

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