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  • Average homeowner rating star icon4.1
    Average homeowner rating
  • Verified reviews icon66
    Verified custom home building reviews

Top-Rated Custom home builders in O Fallon - Updated Nov 2026

Avatar for Terbrock Remodeling & Construction
Terbrock Remodeling & Construction
4.4(
78
)
Find a Custom Home Builder

Serving O Fallon, MO and surrounding areas

Approved

In business since 1950

Free estimates

Warranties offered

"Everything went great from start to finish - I'm very pleased with the experience and their work! I wanted a general contractor type of company that could come in and just take my hand-drawn vision on graph paper to a fully completed project, and that's exactly what they did! I wanted to not have to worry about coordinating different contractors to do pieces of the work and have to babysit the process, worry about workers not showing up and throwing off the rest of the schedule, and have things drawn out over months and months, like we had done upstairs. My husband and I knew the kind of company we wanted would come with a higher price tag than patchwork contractors, which it did, but it was well worth it for the headaches and time they saved me!! They were always on time, highly communicative (which is very much appreciative and not always present in the construction business), and very pleasant to work with! They didn't even blast music like most construction crews, which made for the best possible experience having others in your home every day for several weeks. Even minor sticking points we ran into (couple of wrong parts ordered, door & schedule changes, etc.) were no big deal to hash out. Everyone always made time and was patient with answering my questions and addressing requests or concerns, which was awesome. Even when I was laid off after signing the contract and needed to find more work in a tough COVID-19 market so needed to delay the start date, Tom worked with me. They made sure we're 100% satisfied, which we very much are! The quality of work is great, and everything looks amazing as you can see in the photos below!"
Kitchen Transformation
Anchor Bend Estates
Anchor Bend Estates
Anchor Bend Estates
Additional Photos

+20

Response rate100%
2 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Tittel Construction
Tittel Construction
5.0(
15
)
Find a Custom Home Builder

Serving O Fallon, MO and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"We love our new shed! We hired Tittel Construction to build a custom shed on the site of our previous shed. The concrete pad was there already but has a definite slope from a previous tree growing too close. Connor was able to not only build a great shed, but also make it level on a sloped foundation! He was very patient and helped me design, through Pinterest pics and my rough drawings, the perfect shed including 10 reclaimed windows. I’d highly recommend Tittel Construction."
Shed build
Staircase rebuild for customer
Decorative ceiling
Fascia and siding
30x20x10 Shed build

+4

Response time2 days
Response rate92%
12 neighbors recently requested a quote
Avatar for Bayliss Construction
Bayliss Construction
5.0(
1
)
Find a Custom Home Builder

Serving O Fallon, MO and surrounding areas

Approved

In business since 2009

Free estimates

Customers say: Quick response

Bayliss Construction, takes great pride in our experience, expertise, craftsmanship, and customer service that we provide to meet our clients needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. Bayliss Construction, is a full service locally owned and operated general contractor. Our reputation is based on service, safety, and quality, regardless of how large, or small the job.

Response time5 hrs
9 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Bizzy Beaver Contracting
Bizzy Beaver Contracting
5.0(
10
)
Find a Custom Home Builder

Serving O Fallon, MO and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"Chris with Bizzy Beaver has been AMAZING. We have hired them for 3 separate projects in the last year after purchasing our first home. We initially used them when we adopted a rescue dog and needed to get a 6ft privacy fence built ASAP. Chris and his team completed this quickly and did a great job. We then had Chris build custom cabinet doors, drawer boxes, and drawer fronts to update our kitchen in time for an event at our house! He made sure to complete the project on time, and the kitchen looks amazing and like a totally new kitchen! Chris also helped represent us to our insurance company while helping us file our claim after a major hail storm. Tim and Chris explained everything in depth and made the process as easy as possible for us. They met with the insurance adjuster to ensure all damages were assessed correctly, which was a huge help since we are first time homeowners and had never had to do that before. Bizzy Beaver is always reliable, on time, personable, and makes sure everything is completed correctly. Chris and his team are so easy to work with - I would definitely recommend using them for any of your home improvement projects!!"
Dellwood Kitchen
Dellwood Bathroom
Custom Closet
Dellwood Kitchen
Dellwood Bathroom

+52

Recommended by100%of homeowners
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Custom Home Builders FAQs, answered by experts

There are energy-efficient options when building a cottage. Select green building materials, high-performance insulation, and energy-efficient windows when designing your cottage. Options such as solar panels, efficient HVAC systems, and LED lighting can lower your utility bills and reduce your environmental impact. Many builders offer energy-efficient upgrades as part of the design process.

Ranch and colonial-style homes are often the most affordable to build. They have a common layout with available designs that are easy to adjust in simple ways without having to spend too much on a structural engineer or architect. Both types of homes' symmetry, simple roofs, and often one or two-story plans mean they often fall in the $150 to $200 square-foot range, putting them right around average.

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.

Check reviews, compare quotes, and verify licensing. Ensure the builder has experience with modular construction.

Most cottages are around 1,000 square feet, making them smaller than most other styles. However, cottages are defined more by their decor and architectural focus on simplicity, functionality, and a connection to nature than they are by a rigid square footage or floor plan. While cottages are defined more by their charm and appearance than size, the smaller footprint does help maximize the comfort and charm, and it keeps the focus on connection to nature and family.

The O Fallon, MO homeowners’ guide to custom home building

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