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

Verified Reviews for Custom Home Building pros in O Fallon, MO

*The Angi rating for Custom Home Building companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Custom Home Building needs.

*The HomeAdvisor rating for Custom Home Building companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Custom Home Building needs.

Last update on May 23, 2026

Find Custom home builders in O Fallon

Avatar for Terbrock Remodeling & Construction
Terbrock Remodeling & Construction
4.4(
77
)

Serving O Fallon, MO and surrounding areas

Approved

In business since 1950

Free estimates

Warranties offered

"Terbrock's team showed up on time and did the work professionally and carefully -- like it was their own personal home improvement project. At the end of the day, Tom Terbrock himself showed up to make sure everything went well. The price for the work, including removal of existing fixtures, installation, and clean-up, was more than reasonable."
Kitchen Transformation
Anchor Bend Estates
Anchor Bend Estates
Anchor Bend Estates
Additional Photos

+20

Response rate100%
1 neighbors recently requested a quote
Recommended by89%of homeowners
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Avatar for Tittel Construction
Tittel Construction
5.0(
14
)

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
Response time2 days
Response rate92%
5 neighbors recently requested a quote
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Avatar for Sentri Homes
Sentri Homes
2.9(
39
)

Serving O Fallon, MO and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Sentri Homes provided the most professional flooring service I’ve ever had. The LVP installation turned out absolutely beautiful, and I was amazed at how quickly everything was completed without sacrificing quality. The crew was fast, accurate, and extremely detail-oriented from start to finish. Everything was installed cleanly, precisely, and with real craftsmanship. The entire process was smooth, efficient, and far beyond what I expected. I would absolutely recommend Sentri Homes to anyone needing flooring installed."
25 neighbors recently requested a quote
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Ascended Constructions
New to Angi

Serving O Fallon, MO and surrounding areas

Approved (Corporate)

In business since 2023

Offers commercial services

We’re a family owned and operated company that values honesty and integrity, and stands behind our work. We offer over 40 years of industry experience. We specialize in Asphalt Shingle Roofing installation, replacement, and repairs. Our services are customized to the individual project, paying close attention to the details of each project that we're involved with. We look forward to building long-term relationships with our clients and guarantee your satisfaction!

1 neighbors recently requested a quote
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Avatar for Bizzy Beaver Contracting
Bizzy Beaver Contracting
5.0(
10
)

Serving O Fallon, MO and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"Chris and his crew made sure they knew my style and what I was looking for in my family room makeover. He built our mantle and shelves from scratch and we couldn't be happier with the way in turned out!!"
Dellwood Kitchen
Dellwood Bathroom
Custom Closet
Dellwood Kitchen
Dellwood Bathroom

+52

Recommended by100%of homeowners
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Avatar for Acasta Systems
Acasta Systems
5.0(
9
)

Serving O Fallon, MO and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"1. Jonanthan gave me the best and most honest price among the quotes from 5 contractors. 2. He worked very carefully in this job. I am very satisfied on the quality of the installation. I was trying to find the issues on alignment and spacing but I could not. 3. The most impressive part for Jonanthan is he stayed late on Christmas Eve to finish the job and kept his promise on working days. I haven’t seen any contractors like him who is so dedicated to the job and schedule. 4. The only recommendation is to invest a little more to upgrade tools to improve efficiency. But I believe it won’t be a problem in future as you would earn many customers because of your work attitude. Overall I highly recommend Jonanthan and I hope his business is better. I will certainly return if I need anything to be done in future."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+8

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

Start by researching local contractors with experience in cottage construction. Ask for references, check licensing and insurance, and review completed projects. Compare multiple bids, making sure each includes the same scope of work. A good contractor will communicate clearly, provide a detailed contract, and ensure all work meets code and safety standards.

The average cost to build a modular home is around $270,000, and most modular homes total between $180,000 and $360,000. Of course, this price varies significantly by location, and the price tends to follow the cost of living in the area. There are quite a few other factors at play that can affect your pricing, including the following:

  • Number of bedrooms and bathrooms

  • Site preparation, including land clearing and leveling

  • Type of foundation

  • Utility connections

  • Cost of building permits

The average cost to renovate or remodel a home is $52,300, with most projects ranging from $19,500 to over $88,400. However, costs can vary significantly, from as low as $3,000 for a small project to $170,000 or more for a complete home remodel.

Several factors influence the total price, including:

  • Project Scope and Size: The extent of the renovations, whether it's a single room or the entire house.

  • Location: Geographic location affects labor and material costs.

  • Materials: The quality of materials chosen.

  • Room Type: Kitchen remodels ($14,500 - $70,000+) are generally more expensive than bedroom remodels ($1,500 - $5,500).

  • Other Factors: The time of year, complexity of the work, and any additions or expansions.

On a per-square-foot basis, you can expect to pay between $15 and $60 for standard projects and up to $150 for luxury renovations.

Examples of specific project costs include:

  • Basement remodel: ~$20,200

  • Garage remodel: ~$27,900

  • Loft conversion: ~$20,200

  • Disability accommodation remodel: ~$4,300

  • Major home repairs: ~$11,700

If you are financing the project, note that some loan programs, like the FHA 203(k), may require a minimum project cost (e.g., $5,000) and will necessitate a home appraisal and professional cost estimates. Using a home renovation cost estimator can also help you budget for your project.

A-frame homes are on the smaller side. While there’s no set square footage amount it has to be, it will usually come in around 1,000 square feet or smaller.

Typically, architects do not build homes in a hands-on sense of doing the actual framing, roofing, or other building. Architects usually do not have the training and experience to build the homes they design. An architect would need to know how to do the specific trades required to build a house, which is possible but not a common practice. A general contractor or homebuilder typically oversees the actual details of building the house that the architect designs.

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.

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