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Top-Rated Foundation repair specialists in Cortland - Updated Nov 2026

Avatar for Perma-Seal Basement Systems
Perma-Seal Basement Systems
4.4(
1,539
)
Concrete Foundation - Repair

Serving Cortland, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1979

Free estimates

Emergency services offered

"I'm proud to hear my son, Robert Wolfrum, is working for Perma-Seal. I first used Perma-Seal in the 80's for a foundation crack repair in our South Holland, IL home and then again at our Tinley Park, IL home. Both experiences were memorable and professional and fixed our basement water problems. It is good to know that my son is working for a reputable company that has been doing quality work for decades. I was surprised to hear that they do insulation and concrete leveling."
Thermal imaging
Blower door test
Old insulation removal
New blown insulation
Perma-Seal Attic Insulation

+48

Response time1 day
Response rate100%
47 neighbors recently requested a quote
Avatar for U.S. Waterproofing
U.S. Waterproofing
4.2(
598
)

Serving Cortland, IL and surrounding areas

Approved

In business since 1957

Free estimates

Warranties offered

"Called company on Monday and got an appointment for an inspection on Wednesday. That following Monday, the technician arrived and went through each step is sealing off the concrete foundation to the water leak. The fix worked well and was put to the test with the recent record rains. Not one drop of water came into the basement."
Radon Mitigation
Radon Mitigation
Basement Waterproofing
Basement Waterproofing
Response time1 day
Response rate100%
17 neighbors recently requested a quote
Avatar for Everseal Basement, Inc.
Everseal Basement, Inc.
4.5(
130
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"Overall the company was great to deal with. There was a delay in them getting back with us regarding a trim piece that needed to be installed. They made it right. I would recommend them for this type of service/repair."
Response time1 day
Response rate88%
3 neighbors recently requested a quote
Avatar for J & P Brothers Landscaping
J & P Brothers Landscaping
4.9(
44
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"J&P did a great job. The brick edging around the landscaping had been a mess of sinking and uneven bricks - now they look like new. Very responsive and nice people to work with. We'll use them again in the future."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+50

Response time2 days
Response rate100%
2 neighbors recently requested a quote
Avatar for AccuLevel, Inc. - Northern Illinois
AccuLevel, Inc. - Northern Illinois
3.9(
215
)
Concrete Foundation - Repair

Serving Cortland, IL and surrounding areas

Approved

In business since 1996

Free estimates

Warranties offered

"This company is top notch. They fixed my sagging floor and it now looks beautiful. My house was built n 1902 and can be a challenge at times to work on. They were professional and did the job in less time then they original thought. I am so very pleased with their work. I would hire them again in a minute for any foundation and floor leveling needs. Thank\ you Acculevel!!!!!"
Wall Anchors
Exterior Foundation Repair
Bowed Wall Foundation Repair AFTER
Horizontal Wall Crack BEFORE
Exterior Wall Anchors

+31

Response time4 days
69 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Four Seasons Heating & Air Conditioning
Four Seasons Heating & Air Conditioning
4.3(
3,298
)

Serving Cortland, IL and surrounding areas

Approved (Corporate)

In business since 1971

Free estimates

Emergency services offered

"on time, and knowledgeable the technician did the job well. Also, I had a problem changing the furnace filter. The filter was getting stuck when taking it out or installing. He repaired that too."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Response time9 hrs
44 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Best Solutions Basement Repairs & Waterproofing
Best Solutions Basement Repairs & Waterproofing
5.0(
5
)

Serving Cortland, IL and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

before
after picture
Response time2 days
8 neighbors recently requested a quote
Avatar for Copper Sky Plumbing
Copper Sky Plumbing
4.8(
55
)

Serving Cortland, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Emergency services offered

"I highly recommend Copper Sky Plumbing. They are very prompt and professional. We initially used their service to replace a leaky Back Flow Preventer. Since then we had a leak in plumbing between the walls and they made it a priority to immediately visit our house, diagnose the issue, make a small cut in the wall and fix the issue. All this was done without any major dry wall damage."
Electric to Gas
Original bathtub before
Demolition has begun
Shower walls are removed, bathtub is sawed in half for removal.
Ready to begin installation of new shower.

+39

Response time11 hrs
Response rate100%
1 neighbors recently requested a quote
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Showing 1-10 of 100

The Cortland, IL homeowners’ guide to foundation repairs

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