Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in O Fallon, MO

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Addition to existing structure builders in O Fallon

Matt Hawkins Construction

5.00(
2
)
Approved Pro

Matt Hawkins Construction

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
8 years of experience

With several years experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

"High quality work, very responsive, good guys."

Mike S on March 2020

With several years experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

"High quality work, very responsive, good guys."

Mike S on March 2020


Avatar for RBM Construction

RBM Construction

4.93(
7
)
Approved Pro

RBM Construction

4.93(
7
)
Approved Pro
Customers say: Quality work
39 years of experience
Free onsite estimate

As a family-owned business with decades of experience serving the St. Louis area, we specialize in delivering high-quality home remodels that reflect your unique vision. We’re proud to be the parent company of Timber Classic Cabinetry, expanding our services beyond custom cabinetry solutions you already trust. RBM Construction is here to provide exceptional craftsmanship and personalized service every step of the way.

"Excellent work. My new patio was installed better than I would have hoped. Installed on time at reasonable cost."

Robert M on December 2021

As a family-owned business with decades of experience serving the St. Louis area, we specialize in delivering high-quality home remodels that reflect your unique vision. We’re proud to be the parent company of Timber Classic Cabinetry, expanding our services beyond custom cabinetry solutions you already trust. RBM Construction is here to provide exceptional craftsmanship and personalized service every step of the way.

"Excellent work. My new patio was installed better than I would have hoped. Installed on time at reasonable cost."

Robert M on December 2021


Avatar for Dana King Design-Build and Remodeling

Dana King Design-Build and Remodeling

4.81(
209
)
Approved Pro

Dana King Design-Build and Remodeling

4.81(
209
)
Approved Pro
Super Service Award
Customers say: True professional
96 local quotes requested
22 years of experience

At Dana King, we are an award-winning design-build firm that delivers innovative home improvement solutions to St. Louis. From the initial concept to completion, we provide one point of accountability to ensure peace of mind that your remodel will be as envisioned and professionally executed. Our mission is to enhance the way you live in your home.

"We hired Dana King to build our garage and we were so pleased by the result we hired them to remodel our kitchen. Dana and her team do an excellent job communicating throughout the construction project, keeping to their budget, and their designs are simply beautiful. We couldn't be happier with their work to make our home a place of tranquility."

David A on May 2025

At Dana King, we are an award-winning design-build firm that delivers innovative home improvement solutions to St. Louis. From the initial concept to completion, we provide one point of accountability to ensure peace of mind that your remodel will be as envisioned and professionally executed. Our mission is to enhance the way you live in your home.

"We hired Dana King to build our garage and we were so pleased by the result we hired them to remodel our kitchen. Dana and her team do an excellent job communicating throughout the construction project, keeping to their budget, and their designs are simply beautiful. We couldn't be happier with their work to make our home a place of tranquility."

David A on May 2025


Avatar for Assiduous Contracting LLC

Assiduous Contracting LLC

5.00(
18
)
Approved Pro

Assiduous Contracting LLC

5.00(
18
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
12 local quotes requested

Husband and wife team specializing in kitchen remodels, bathroom remodels, cabinet installation, crown molding, flooring and countertops. Offering 30-years experience in residential services. We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!

"The work turned out amazing, I was having plumbing issues under my sink and James was the best bid out of all!! He showed up, showed off and bam the work was done!!!! Him and his wife are amazing people and they have won a lifetime customer! Thanks for everything!"

Lauren C on April 2024

Husband and wife team specializing in kitchen remodels, bathroom remodels, cabinet installation, crown molding, flooring and countertops. Offering 30-years experience in residential services. We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today!

"The work turned out amazing, I was having plumbing issues under my sink and James was the best bid out of all!! He showed up, showed off and bam the work was done!!!! Him and his wife are amazing people and they have won a lifetime customer! Thanks for everything!"

Lauren C on April 2024


Avatar for Weaver Commercial & Home Improvements, LLC

Weaver Commercial & Home Improvements, LLC

4.13(
16
)
Approved Pro

Weaver Commercial & Home Improvements, LLC

4.13(
16
)
Approved Pro
Customers say: Terrific value
12 local quotes requested
38 years of experience

Nothing improves the value of your home more than professional updates. At Weaver Commercial and Home Improvements we are a family owned and operated company that provides a wide range of service from kitchen, bath and basement remodels to complete decking installs, room additions and outdoor living spaces. We will customize your home with features to make daily life easier while improving the value of your home. With over 30 years of experience, we bring the quality and service you can trust. Our staff will work closely with you throughout the life cycle of your projects to ensure all of your goals are met. Visa and Mastercard accepted. We also offer financing options from 18 months no interest to fixed rate options for longer payment timelines. Give us a call today!! You won't be disappointed!

"Weaver did very well with our basement finishing. They did get the way we wanted things done, which was a bit unique, but they did miss a few things, like not understand we were going to take care of some things that were non-standard ourselves (because they were non-standard.). They also did leave us hanging a little at the end - we still never got our light switch at the end of the stairs hooked back up to the light, nor found out how to change the cam lights, but at some point I just gave up, cause they were kinda done with us after they got their last payment. Generally good to work with, they did have a bit of a time getting workers due to COVID, and there were some small less than desirable messes left. But thatâ  s small compared to the overall work, which was good. So Iâ  m pretty happy overall."

Jamie B on August 2021

Nothing improves the value of your home more than professional updates. At Weaver Commercial and Home Improvements we are a family owned and operated company that provides a wide range of service from kitchen, bath and basement remodels to complete decking installs, room additions and outdoor living spaces. We will customize your home with features to make daily life easier while improving the value of your home. With over 30 years of experience, we bring the quality and service you can trust. Our staff will work closely with you throughout the life cycle of your projects to ensure all of your goals are met. Visa and Mastercard accepted. We also offer financing options from 18 months no interest to fixed rate options for longer payment timelines. Give us a call today!! You won't be disappointed!

"Weaver did very well with our basement finishing. They did get the way we wanted things done, which was a bit unique, but they did miss a few things, like not understand we were going to take care of some things that were non-standard ourselves (because they were non-standard.). They also did leave us hanging a little at the end - we still never got our light switch at the end of the stairs hooked back up to the light, nor found out how to change the cam lights, but at some point I just gave up, cause they were kinda done with us after they got their last payment. Generally good to work with, they did have a bit of a time getting workers due to COVID, and there were some small less than desirable messes left. But thatâ  s small compared to the overall work, which was good. So Iâ  m pretty happy overall."

Jamie B on August 2021


Avatar for Beaty Home Improvements

Beaty Home Improvements

4.48(
624
)
Approved Pro

Beaty Home Improvements

4.48(
624
)
Approved Pro
Customers say: Super punctual
467 local quotes requested
19 years of experience

Beaty Home Improvements has been providing professional quality remodeling services in St. Louis for over 20 years. Our attention to detail ensures that every kitchen and bathroom project is completed to the highest standard. Customer satisfaction is our top priority. Contact us today for all your home improvement needs.

"Unfortunately, since their "foreman" was too busy to call us about the project we will have look elsewhere. The lack of common courtesy tells me that this is a company to avoid, and their attitude is probably reflected in their work!"

Marc H on October 2025

Beaty Home Improvements has been providing professional quality remodeling services in St. Louis for over 20 years. Our attention to detail ensures that every kitchen and bathroom project is completed to the highest standard. Customer satisfaction is our top priority. Contact us today for all your home improvement needs.

"Unfortunately, since their "foreman" was too busy to call us about the project we will have look elsewhere. The lack of common courtesy tells me that this is a company to avoid, and their attitude is probably reflected in their work!"

Marc H on October 2025


Avatar for Coach House Garages

Coach House Garages

4.88(
92
)
Approved Pro

Coach House Garages

4.88(
92
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
313 local quotes requested

WE BUILD CUSTOM GARAGES DESIGNED TO FIT YOUR LIFE, BUDGET, AND DREAMS At Coach House, our buildings are more than just garages and sheds. By combining your imagination with our experience built from generations of Amish craftsmanship and the finest quality materials, we can build you a garage that fits all of your specifications at a budget you can live with. All with a warranty that cannot be matched by any other garage builder… Whether you have a particular design in mind — or you’re just beginning to dream about having more space —Coach House can help your dream come true. Garages, Garden Sheds, Guest Houses, Man Caves, She Sheds, Barndominiums, Pool Houses Workshops, Home Offices… A Coach House Garage is an extension of your life, whether it’s a structure for your vehicles, a space for your hobby, a playroom for your children, or a sanctuary from the outside world, we understand the impact and importance your Coach House will have in your life. You want a building that compliments and enhances your home, and brings value for years to come. You can count on your Coach House team to listen to your needs, and create the perfect building to fit your unique vision.

"Yes yes Great job"

Paul L on December 2025

WE BUILD CUSTOM GARAGES DESIGNED TO FIT YOUR LIFE, BUDGET, AND DREAMS At Coach House, our buildings are more than just garages and sheds. By combining your imagination with our experience built from generations of Amish craftsmanship and the finest quality materials, we can build you a garage that fits all of your specifications at a budget you can live with. All with a warranty that cannot be matched by any other garage builder… Whether you have a particular design in mind — or you’re just beginning to dream about having more space —Coach House can help your dream come true. Garages, Garden Sheds, Guest Houses, Man Caves, She Sheds, Barndominiums, Pool Houses Workshops, Home Offices… A Coach House Garage is an extension of your life, whether it’s a structure for your vehicles, a space for your hobby, a playroom for your children, or a sanctuary from the outside world, we understand the impact and importance your Coach House will have in your life. You want a building that compliments and enhances your home, and brings value for years to come. You can count on your Coach House team to listen to your needs, and create the perfect building to fit your unique vision.

"Yes yes Great job"

Paul L on December 2025


Avatar for Norse Construction, LLC

Norse Construction, LLC

4.62(
50
)
Approved Pro

Norse Construction, LLC

4.62(
50
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
21 local quotes requested

Norse Construction, LLC is a unique small business. Over my 30 plus years of construction I've had numerous customers tell me of contractors who don't show up, don't clean up after themselves, build what THEY want and NOT what the homeower wants. Its simple. I started Norse simply because you should have what YOU want and when you want it - period.

"We attempted to have our unfinished basement finished in 2020. The project started in June of 2020 and was terminated unfinished in January of 2021. Total cost of the partial project was $75,771. Several issues led to the termination of the project. The primary was lack of actual project management and ability to take responsibility for errors by the contractor, which, in addition to being frustrating, contributed to the unnecessarily long project time of 7 months while still not being finished. Examples include: - An I-Beam for a heavy-bag track was to be installed on the ceiling. It was installed in the incorrect location and extremely poorly, to the point where flanges were overlapping. When confronted, the contractor stated that it just "wasn't finished". However, the correction required the complete removal and re-installation. Then the contractor claimed the issue was due to insufficient instruction supplied, even though all required information was in fact supplied. The installation crew was simply not competent and failed to install as instructed. - Wood panels were put on a large portion of the ceiling. Several conversations in writing instructed that there was to be no more work done after the initial paint as we liked the look as is. When painters were on-site for the walls, it was confirmed with them verbally that the ceiling was complete and not to perform work on them. However, they caulked and painted it anyway. When confronted, the contractor stated it was always known that this work was to be done. He also said it was only painted and not caulked, which was clearly not the case. Additionally, when shown texts and emails where we explicitly requested no more work done to the ceiling and that he also stated it was complete, he simply ignored it. - When ordering a vanity, he sent us to a shop to select one. However, when it came time to need the vanity, we found it had never actually been ordered. The contractor blamed us for not ordering it while at the shop, however the person at the shop later confirmed the hold up was the contractor not confirming the order. These are some of the biggest examples, but there were communication issues throughout the project. The termination of the contact didn't go any better than the rest of the project. We were told up front, in writing, that we would be billed for all services each week for the prior week. However, when we were settling up after the contract was terminated, there were many costs he was back charging for, meaning they were not billed during the week of work as the original contract stated. One of the items had no reciept. One of the bigger issues here was the painting. The painting cost was much too high relative to the original bid price based on actual work performed. When asked for an itemized bill for painting, it included painting work that had not been performed. The contractor ultimately removed the item for which he didn't have a receipt and reduced the paint cost by some amount. It was still not correct, but we agreed to pay to end the situation."

Jeremy H on January 2023

Norse Construction, LLC is a unique small business. Over my 30 plus years of construction I've had numerous customers tell me of contractors who don't show up, don't clean up after themselves, build what THEY want and NOT what the homeower wants. Its simple. I started Norse simply because you should have what YOU want and when you want it - period.

"We attempted to have our unfinished basement finished in 2020. The project started in June of 2020 and was terminated unfinished in January of 2021. Total cost of the partial project was $75,771. Several issues led to the termination of the project. The primary was lack of actual project management and ability to take responsibility for errors by the contractor, which, in addition to being frustrating, contributed to the unnecessarily long project time of 7 months while still not being finished. Examples include: - An I-Beam for a heavy-bag track was to be installed on the ceiling. It was installed in the incorrect location and extremely poorly, to the point where flanges were overlapping. When confronted, the contractor stated that it just "wasn't finished". However, the correction required the complete removal and re-installation. Then the contractor claimed the issue was due to insufficient instruction supplied, even though all required information was in fact supplied. The installation crew was simply not competent and failed to install as instructed. - Wood panels were put on a large portion of the ceiling. Several conversations in writing instructed that there was to be no more work done after the initial paint as we liked the look as is. When painters were on-site for the walls, it was confirmed with them verbally that the ceiling was complete and not to perform work on them. However, they caulked and painted it anyway. When confronted, the contractor stated it was always known that this work was to be done. He also said it was only painted and not caulked, which was clearly not the case. Additionally, when shown texts and emails where we explicitly requested no more work done to the ceiling and that he also stated it was complete, he simply ignored it. - When ordering a vanity, he sent us to a shop to select one. However, when it came time to need the vanity, we found it had never actually been ordered. The contractor blamed us for not ordering it while at the shop, however the person at the shop later confirmed the hold up was the contractor not confirming the order. These are some of the biggest examples, but there were communication issues throughout the project. The termination of the contact didn't go any better than the rest of the project. We were told up front, in writing, that we would be billed for all services each week for the prior week. However, when we were settling up after the contract was terminated, there were many costs he was back charging for, meaning they were not billed during the week of work as the original contract stated. One of the items had no reciept. One of the bigger issues here was the painting. The painting cost was much too high relative to the original bid price based on actual work performed. When asked for an itemized bill for painting, it included painting work that had not been performed. The contractor ultimately removed the item for which he didn't have a receipt and reduced the paint cost by some amount. It was still not correct, but we agreed to pay to end the situation."

Jeremy H on January 2023


Avatar for StudioMarq, LLC

StudioMarq, LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

StudioMarq, LLC

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
18 local quotes requested
1 years of experience

At StudioMarq LLC we make dreams come true. With over 30 years of experience, this phrase has become more than a catchy slogan. It's simply the way we do business. StudioMarq LLC does everything from custom home building and remodeling to small commercial build outs. We offer quality, professionalism and competitive pricing for every job, regardless of project size. Customer satisfaction is our primary goal. StudioMarq LLC looks forward to making your dream a reality.

At StudioMarq LLC we make dreams come true. With over 30 years of experience, this phrase has become more than a catchy slogan. It's simply the way we do business. StudioMarq LLC does everything from custom home building and remodeling to small commercial build outs. We offer quality, professionalism and competitive pricing for every job, regardless of project size. Customer satisfaction is our primary goal. StudioMarq LLC looks forward to making your dream a reality.


Avatar for Kimberlin Construction Co Inc

Kimberlin Construction Co Inc

4.97(
34
)
Approved Pro

Kimberlin Construction Co Inc

4.97(
34
)
Approved Pro
Customers say: Super punctual
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
47 local quotes requested

Kimberlin Construction is a diverse company that specializes in interior and exterior projects such as, kitchen and bath remodels, room additions, floors, decks, concrete work and any repair on your home. The owner spends one on one time with the client and is able to find the best and most affordable way to take care of any project!

"Great! Kimberlin Construction Company is the best. This is the most recent project we had done by them. As always they did a great job. Showed up when they said they would. Great crew and excellent craftsmanship. This is the fourth project we had done by them and we will definitely hire them again in the future. Best contractor we have ever worked with."

Lawrence M on October 2023

Kimberlin Construction is a diverse company that specializes in interior and exterior projects such as, kitchen and bath remodels, room additions, floors, decks, concrete work and any repair on your home. The owner spends one on one time with the client and is able to find the best and most affordable way to take care of any project!

"Great! Kimberlin Construction Company is the best. This is the most recent project we had done by them. As always they did a great job. Showed up when they said they would. Great crew and excellent craftsmanship. This is the fourth project we had done by them and we will definitely hire them again in the future. Best contractor we have ever worked with."

Lawrence M on October 2023

...
Showing 1-10 of 1025
FAQs for addition to existing structure building service projects in O Fallon, MO

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The O Fallon, MO homeowners’ guide to addition to existing structure building services

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