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  • Verified reviews icon11
    Verified structural engineering services reviews

Top-Rated Structural engineers in O Fallon - Updated Nov 2026

Avatar for HUNEKE ENGINEERING INC
HUNEKE ENGINEERING INC
4.6(
51
)
Engineer - Structural

Serving O Fallon, IL and surrounding areas

Approved

In business since 2005

Emergency services offered

Customers say: Super punctual

"I highly recommend Huneke Engineering. They are very honest and know what they are doing. They saved me a lot of money when a foundation company tried to bid me something that didn’t even need to be done. ALWAYS get a second opinion! I started noticing cracks around my windows in my living room. The windowsill was visibly not level and when I put a level on it, the bubble was very far to the left. I have a bowed foundation wall directly below my living room which has been stabilized by wall anchors before I moved into my house 9 years ago. Long story short. I needed to replace my foundation sill on the bowed wall. You can feel the sill from the outside and it’s hanging off the wall, so all the floor joists were not sitting at the same level. The first structural engineer that I hired before Huneke didn’t even notice this. The company that installed the wall anchors said that my right side of my house was sinking and they gave me a bid for $7,000 to install 5 foundation piers. I asked them if we should use a laser level to be sure and the guy said he used one on the outside of the house. I was with the guy most of the time and was only away from him for a few minutes. There is no way he used a laser level. You are supposed to use the laser level on the inside of the house anyways in the basement for a better measurement. They also said they felt a slope walking into the master bedroom. Liars! I called around trying to find a structural engineer who would be willing to use a laser level in my basement to confirm if the right side of my house is sinking or not and most of the companies I called said they did not do laser levels. The engineers at Huneke Engineering said they could use a laser level so I hired them. They used the laser level in my basement and showed me that the right side of the house is NOT sinking. It’s in code. They noticed my floor joists were uneven. Some of them only measured 3/4 of an inch between the foundation wall and the floor joist, when they should all be at an inch in a half. They also pointed out that my original sill was hanging off the foundation wall on the outside. You can’t see it because of the siding, but you can feel it and see it with a camera. They recommended I jack up my house and place a new pressure treated 2x4 on top of the foundation wall as the sill replacement. They said it was ok to leave the old one on there. They took plenty of time to explain everything to me as I had a lot of questions, so I really appreciated that. I first got a bid from a company to replace the sill but they wanted to charge me $4,000 and I couldn’t afford it at that time. They did use a laser level in my basement and said the right side of my house is NOT sinking. That is two separate companies who confirmed the right side of my house is NOT sinking, so ALWAYS get a second opinion! I installed the new foundation sill with my brother-in-law and his cousin. It required 3 bottle jacks but we got it done and all of the floor joists sit at the same level. The window in the living room is a little more level. It's not perfect, but it's more level than before. Thanks, Huneke Engineering, for your recommendation to replace the foundation sill and for your honesty!"
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+6

Response rate100%
Recommended by91%of homeowners
Avatar for Evolution Drafting
Evolution Drafting
3.7(
128
)
Draftsperson/CADDArchitectArchitect - For Business

Serving O Fallon, IL and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"They were excellent. They quickly made a draft that only needed 3 minor adjustments. The final product was exactly what I needed. They referred me to a structural engineer for review. The whole process took half of the time that they initially estimated. I would definitely use them again."
Zeal Floor Plan
Charcoal
Palm Floor Plan
Charcoal Floor 2
Charcoal Floor 1

+23

Response time1 day
Response rate100%
66 neighbors recently requested a quote
Avatar for APEX Drafting LLC
APEX Drafting LLC
3.5(
8
)
Draftsperson/CADDArchitect

Serving O Fallon, IL and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

We have a single mission: Complete Customer Satisfaction! We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience. \nYou will find us to be competitively priced with close attention to the details. \nOur reputation is based on service, safety, and quality, regardless of how large or small the job. \nWe look forward to building a lasting relationship and guarantee your satisfaction! \n

Plan set 1
282 neighbors recently requested a quote
Avatar for Terraform Development & Design LLC
Terraform Development & Design LLC
4.0(
1
)
ArchitectDraftsperson/CADD

Serving O Fallon, IL and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Offers commercial services

Terraform Development & Design LLC, delivers expert permit-ready architectural plans and drafting services nationwide. With 8+ years of experience and hundreds of clients across all 50 states, we create code-compliant residential and commercial construction documents that get approved fast and built right. \nFrom site plans, floor plans, elevations, structural & foundation drawings to MEP coordination, full construction sets, 3D renderings, interior design, solar PV layouts, and precise material takeoffs - we handle it all. Fast 4-6 week turnaround, 3 design revisions included, free revisions for city redline changes, transparent pricing (starts at $2,000), and direct partnerships with licensed engineers for stamps in every state.

493 neighbors recently requested a quote
Avatar for Advanced Foundation Repair & Replacement
Advanced Foundation Repair & Replacement
5.0(
30
)
Engineer - Structural

Serving O Fallon, IL and surrounding areas

Emergency services offered

"I am writing this review to let other homeowners know that if they are unfortunately in need of foundation repair that the best company capable of handling the job is Advanced foundation repair & replacement. I have a two story home. The entire back and side wall had settled over six inches ( a total distance of seventy five feet). At the side of the house we have a masonry fireplace that had settled significantly as well. Then owner Frank Matyiko hooked up his exclusive unified jacking machine. Frank provided us with a licensed structural engineer that stamped all fazes of construction. He assured me that our house would be a piece of cake. He was right. Advanced leveled the back of my house along with the fireplace with his unified machine. Not a crack in the house. Not a crack in the fireplace. His team was polite courteous and most importantly fixed our problem. Price: $13,500. Thank you Frankie!!!!!"
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+2

Recommended by100%of homeowners
Avatar for Alliance Contracting Solutions
Alliance Contracting Solutions
4.4(
38
)
ArchitectArchitect - For BusinessDraftsperson/CADD+1 more

Serving O Fallon, IL and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"There work was exceptional. They were very reasonable on the price for the work performed. Scott and his crew were extremely professional and polite and worked well with us developing the final bathroom designs. I would highly recommend them to anyone interested in any home improvement project. I will hire them again if I ever need any work done at my house. Very, very impressive company and employees."
Recommended by83%of homeowners
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Structural Engineering FAQs, answered by experts

It depends on the bank and the extent of the issue. Some banks will lend against homes with minor foundation damage, but most won’t if the issue is structural since the home acts as collateral for the mortgage. Banks that offer renovation loans might still finance a home with structural problems. More minor issues like settling cracks and intermittent problems with humidity are unlikely to stop a bank from financing.

Yes, you can build over a stump if the roots are no longer alive. Living roots will continue to grow and may damage your new construction over time. Similarly, you should also remove rotting stumps because they may continue to attract pests and even cause new structures (especially those made from wood) to decompose as well.

Structural engineers typically conduct inspections during a home sale or renovation, looking for signs of structural damage in various structures throughout the building, such as load-bearing walls, joists, beams, roofing trusses, foundations, and chimneys. Some of the warning signs that structural engineers check for include:

  • Dry rot

  • Infestation

  • Shifting or cracking foundations

  • Erosion

  • Water damage

  • Sagging, shifting, or damaged walls, ceilings, or roofing support

Any issue that affects the structural integrity or soundness of a home is considered a structural issue. In addition to foundation cracks, other signs of structural issues include roof leaks, bowing walls, sloping floors, gaps around windows and doors, and more.

Signs of structural damage include foundation cracks, roof leaks, bouncy floors, crumbling concrete, and cracked or leaning chimneys. Structural damage can make itself apparent in various ways, and sometimes, there may not be obvious signs. Inspect your foundation and roof annually to stay ahead of potentially serious structural problems. 

The O Fallon, IL homeowners’ guide to structural engineering services

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