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Top-Rated Home builders in O Fallon - Updated Nov 2026

Avatar for The Shed Shak
The Shed Shak
5.0(
5
)
Shelter or Outbuilding - Build

Serving O Fallon, IL and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"They went above and beyond everything they promised. The building is amazing and the people are even better!! I would highly recommend Shed Shak to anyone!"
Shed Build
8x12 Victorian Playhouse
10x12 Side Utility
12x20 Best Value Metal
12x24 Cottage Shed

+6

Response time2 days
5 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for RDB CONSTRUCTION LLC
RDB CONSTRUCTION LLC
New to Angi
Shelter or Outbuilding - Build

Serving O Fallon, IL and surrounding areas

Approved

Free estimates

Small jobs welcome

As 30+ years experience carpenters, we are always prepared to take on your projects with precision and care. We pride ourselves on being courteous and polite, ensuring a positive experience from start to finish. Our approach involves actively listening to your needs and preferences to deliver tailored solutions. ???? We understand the importance of clear communication and collaboration to bring your vision to life. From the initial consultation to the final touches, We are dedicated to providing exceptional craftsmanship. ? We are ready to start, so contact me today. \n

Response time10 hrs
Response rate100%
Avatar for St Louis Insulation
St Louis Insulation
4.9(
67
)
Shelter or Outbuilding - Build

Serving O Fallon, IL and surrounding areas

In business since 2001

Free estimates

Credit card accepted

"St. Louis Insulation did a great job. Zac and his team were great to work with and they cleaned up after their work was completed. We were very happy with the project results and highly recommend St. Louis Insulation."
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+40

Recommended by98%of homeowners
Avatar for Dunn Home Improvements LLC
Dunn Home Improvements LLC
4.4(
79
)
Shelter or Outbuilding - Build

Serving O Fallon, IL and surrounding areas

In business since 2012

Free estimates

Credit card accepted

"The entire experience with Josh Dunn and his team went extremely well. I had another contractor over to look at the space, and his estimate was 30k, he really had no good ideas for what to do with the originally awkward layout, and he advised that I should move my two kids (ages 1 and 4) out of the upstairs during the remodel. Josh walked in and immediately envisioned what to do with the space and came in with a lower estimate. He and Mike worked meticulously, controlled dust, and cleaned up every afternoon before they left. They did any and all sawing and tile-cutting outside. My baby took naps in the basement, but both my kids slept at night in their own beds in their rooms, and I never worried about dust. Josh and Mike are polite and professional, keep you informed of the process, and are also very good at what they do. No drywall seam is visible, no tile is crooked, and the paint job is extremely clean. Our remodel was extensive enough that we needed city (Richmond Heights) permits, and that required that separate electricians and plumbers do that work and that everything (electrical, plumbing, building) be inspected two times. All of that slowed things down, but Josh and Mike communicated so well and kept everything so neat that I had no complaints. They also subcontracted out to workers who were as nice and professional as they are. I will have Dunn Home Improvements do any home remodeling project, large or small, that arises in the future."
Bathroom tile work
Kitchen
Bathroom Remodel/Tile
Bathroom Remodel
Shower Tile

+9

Recommended by87%of homeowners
Avatar for Marketplace Housing
Marketplace Housing
4.3(
11
)
Find a Custom Home BuilderFind a Modular Home Builder

Serving O Fallon, IL and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Office staff is always available for help. No job is too small or too big. They are responsive to our needs for service requests from roofing to foundations. All aspects of home repairs have been done professionally and in a timely manner. I would recommend Marketplace Homes for all your property management needs regarding property repairs and maintenance."
Recommended by77%of homeowners
Good Neighbors LLC
4.3(
89
)
Find a Custom Home BuilderFind a Modular Home Builder

Serving O Fallon, IL and surrounding areas

In business since 1999

Free estimates

"The timeline was the biggest problem.  The time it took contractor to finish the project was nearly 2.5 months from start to (almost) finish, with a single bathroom in the house. During this time, there were 2 holidays (Christmas and New Year's) and some days of inclement weather which would have prevented anyone from traveling (~3 in all). However, there was one entire week that I was on travel and returned to find zero progress had been made in that amount of time.
The original estimate was $2,500 for labor only for the bathroom. There were additional items that surfaced throughout the renovation which added scope to the project that increased the labor to nearly $3,700. I provided all material for the project.
Contractor requested milestone payments in advance of work being completed, to include final payment, which was made with promise from Contractor that he would return to fix minor "nit-pick" items, which never did take place. I have had to perform those items myself.
Contractor would set tools in bathtub and on top of porcelain toilet, which resulted in scratches in both. In retrospect I would have requested him to place pads down.
Contractor also did not lay down anything to protect the floors in the house from outside elements that were brought in on his boots (snow/rain), and that was then mixed with debris and dust from  the construction. This made it extremely difficult to clean the floors.
Overall, the bathroom looks nice. When looking in detail, however, once can see where craftsmanship/attention to detail is lacking due to a rush to complete the project.


"
Recommended by94%of homeowners
Avatar for Sears Home Improvement Products
Sears Home Improvement Products
3.7(
1,712
)
Find a Custom Home BuilderFind a Modular Home Builder

Serving O Fallon, IL and surrounding areas

In business since 1886

Free estimates

Credit card accepted

"Sears Home Improvement Products have washers and fittings to repair washing machines and such. The staff seem real knowledgeable and they were friendly with my son when my son was asking the sort of questions he asks everyone! The pricing is reasonable."
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Recommended by74%of homeowners
Miller Home Improvement
4.4(
15
)
Find a Custom Home BuilderFind a Modular Home Builder

Serving O Fallon, IL and surrounding areas

In business since 1993

Free estimates

"We are very happy with the work that Miller Home Improvement did on refacing our kitchen cabinetsThey did an awesome job on everything even right down to the littlest details...they were very neat and clean...and always very nice and friendly!!! The quality of these new drawers and doors are made very nice!! We will for sure use them again for any type of contracting work we need done and we will be referring them to others!!! Thanks to Miller Home Improvement we have a beautiful new kitchen and we couldn't be happier!!!
"
Recommended by91%of homeowners
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Home Building FAQs, answered by experts

The longest part of building a custom home is the design phase. It takes multiple professionals and a ton of work to bring your vision for your dream home to life while sticking to a homebuilding budget and also ensuring everything is built to code. Expect the design phase for a custom home build to take six months to a year.

Custom homes can take an average of 18 months to build, mainly due to the lengthy design process, and most projects take somewhere between 12 and 24 months. When you work with the right custom home builders near you, they can help you map the road ahead and understand what can speed up or delay the timeline. Choosing locally available materials, for example, can speed things up without losing that customized touch.

Modular homes are more affordable than stick-built homes if you keep quality and square footage equal. The cost to build a home averages $323,000, while average modular home prices sit at {AvgCost}. If you’re looking for custom or luxury options, a traditional custom home costs $825,000, while a high-end modular home costs $600,000, on average.

Ultimately, a work warranty is only as reliable as the contractor you’ve hired. That’s why trust and reputation are such important factors, in addition to having a solid contract and confirming appropriate licensing, insurance, and bonding. When looking for a contractor, it’s a good idea to read online reviews and ratings to see what kind of experience past customers have had. Issues with your contractor can make for an unsatisfying renovation process, but a reliable contractor can make the process go as smoothly as possible.

Yes, a home builder or contractor should have the proper licensing and insurance. Licensing requirements vary by state and municipality, but most states mandate that a builder holds at least a general contractor’s license. For specialized work such as plumbing, electrical, roofing, or sewage systems, individual licenses may be required, in which case the builder may subcontract the work. You can use Angi’s state licensing tool to review your local guidelines and confirm a builder's credentials. As you browse professionals, you can also look for the “Angi Certified” badge. This indicates the business meets our certification standards, which include passing a criminal background check, holding applicable state and local licenses, and maintaining an average rating of 3.0 or better.

The O Fallon, IL homeowners’ guide to home building services

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