Top-rated subcontractors.

Get matched with top subcontractors in O Fallon, MO

Enter your zip and get matched with up to 3 pros

Need a pro for your subcontracting project in O Fallon, MO?

Select your specific project to find the pro for you.

TRUSTED BY O FALLON, MO HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon2.9k+
    Verified subcontracting services reviews

Find Subcontractors in O Fallon

Avatar for Mr. Electric of St. Louis

Mr. Electric of St. Louis

248 Grand Ave
5.00(
11
)
Approved Pro

Mr. Electric of St. Louis

248 Grand Ave
5.00(
11
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
275 local quotes requested

Electricity makes the modern world go round. When your power shorts out, call Mr. Electric of St. Louis for quick and convenient repairs. We offer our electrical expertise in St. Louis City and County, St. Charles City & County, Belleville and surrounding area. Your home or business is in good hands, whether you’re hoping to overhaul the wiring or install ceiling fans. Our promise to you is the best work, whether your needs are common or complicated.

"Kyle came out to our house from Mr. Electric fix a circuit that was not functioning. Kyle used a very good approach of identifying what was working and what was not. He then did a further scan and found the problem that was an outlet receptacle that had a loose connection and ultimately shorted out to some extent. Kyle was courteous, easy to work with and very good at communication. He kept us abreast of the progress."

Lionel M on August 2025

Electricity makes the modern world go round. When your power shorts out, call Mr. Electric of St. Louis for quick and convenient repairs. We offer our electrical expertise in St. Louis City and County, St. Charles City & County, Belleville and surrounding area. Your home or business is in good hands, whether you’re hoping to overhaul the wiring or install ceiling fans. Our promise to you is the best work, whether your needs are common or complicated.

"Kyle came out to our house from Mr. Electric fix a circuit that was not functioning. Kyle used a very good approach of identifying what was working and what was not. He then did a further scan and found the problem that was an outlet receptacle that had a loose connection and ultimately shorted out to some extent. Kyle was courteous, easy to work with and very good at communication. He kept us abreast of the progress."

Lionel M on August 2025


Avatar for Recon Electric LLC

Recon Electric LLC

770 Spirit 40 Park Drive
5.00(
2
)
Approved Pro

Recon Electric LLC

770 Spirit 40 Park Drive
5.00(
2
)
Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
41 local quotes requested

RECON Electric is your local, family owned, reliable electrician. Licensed, Bonded and Insured. We service residential and commercial customers in the St. Louis and St. Charles County area. At RECON, our standard is exceptional workmanship and we guarantee it! We will deliver 5 star customer service and rapid response times. Call us today to find out how we can keep your project on time and on budget!

"Great! Job done quickly."

Ken T on April 2024

RECON Electric is your local, family owned, reliable electrician. Licensed, Bonded and Insured. We service residential and commercial customers in the St. Louis and St. Charles County area. At RECON, our standard is exceptional workmanship and we guarantee it! We will deliver 5 star customer service and rapid response times. Call us today to find out how we can keep your project on time and on budget!

"Great! Job done quickly."

Ken T on April 2024


Avatar for Fresh Air Heating & Cooling

Fresh Air Heating & Cooling

612 Spirit Valley East Dr
4.77(
270
)
Approved Pro

Fresh Air Heating & Cooling

612 Spirit Valley East Dr
4.77(
270
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
111 local quotes requested

Fresh Air has been family owned and operated since 1987. Family members Patrick, Tim, Katie and Kevin work together to maintain a culture of excellent service. Fresh Air employs 24 people equally dedicated to constant improvement and a consistent delivery of services. A happy customer is priority #1. Choose Fresh Air and experience the exceptional service you deserve. Fresh Air is a 10-time Super Service Award recipient!! (2009-2021). Additional contact name - Katie Sinn. Additional e-mail - [email protected]

"Great customer service when I called for service. Expert technician that diagnosed the problem and quickly repaired my AC."

Tim R on April 2024

Fresh Air has been family owned and operated since 1987. Family members Patrick, Tim, Katie and Kevin work together to maintain a culture of excellent service. Fresh Air employs 24 people equally dedicated to constant improvement and a consistent delivery of services. A happy customer is priority #1. Choose Fresh Air and experience the exceptional service you deserve. Fresh Air is a 10-time Super Service Award recipient!! (2009-2021). Additional contact name - Katie Sinn. Additional e-mail - [email protected]

"Great customer service when I called for service. Expert technician that diagnosed the problem and quickly repaired my AC."

Tim R on April 2024


Avatar for Mr. Rooter Plumbing of Franklin Co

Mr. Rooter Plumbing of Franklin Co

.
4.80(
5
)
Approved Pro

Mr. Rooter Plumbing of Franklin Co

.
4.80(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
24 years of experience

At Mr. Rooter® Plumbing every customer’s individual needs are important. Whether it’s a simple sink clog or a damaged sewer line, you can count on a Mr. Rooter plumber to take care of your plumbing needs – day or night – with never an overtime charge. Our professional service, quality products and honest, up-front pricing make Mr. Rooter the best value in plumbing services nationwide. Mr. Rooter is ready for all emergency plumbing issues, from clogged drains and sewage backups to frozen pipes and leaking water heaters. You can count on an expert diagnosis from Mr. Rooter with our camera inspection tools. Then we’ll fix it right the first time, whether it takes HydroScrub® drain cleaning or trenchless pipe repair, with courteous smiles on our faces. There's a reason they call us Mr.® Call your local Mr. Rooter today.

At Mr. Rooter® Plumbing every customer’s individual needs are important. Whether it’s a simple sink clog or a damaged sewer line, you can count on a Mr. Rooter plumber to take care of your plumbing needs – day or night – with never an overtime charge. Our professional service, quality products and honest, up-front pricing make Mr. Rooter the best value in plumbing services nationwide. Mr. Rooter is ready for all emergency plumbing issues, from clogged drains and sewage backups to frozen pipes and leaking water heaters. You can count on an expert diagnosis from Mr. Rooter with our camera inspection tools. Then we’ll fix it right the first time, whether it takes HydroScrub® drain cleaning or trenchless pipe repair, with courteous smiles on our faces. There's a reason they call us Mr.® Call your local Mr. Rooter today.


Avatar for Ambassador Plumbing L.L.C

Ambassador Plumbing L.L.C

2507 Highway H
5.00(
36
)
Approved Pro

Ambassador Plumbing L.L.C

2507 Highway H
5.00(
36
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
139 local quotes requested

Master Plumber with over 19 years experience for ALL Plumbing Needs! We pride ourselves on the quality work we provide, while delivering great customer service! Call or click to schedule an estimate today! Install, repair, and maintain pipes, valves, fittings, drainage systems, and fixtures on commercial and residential structures. Collaborate with general contractors, electricians, and other construction professionals. Follow building plans and blueprints. Respond to, diagnose, and resolve plumbing emergencies. IF WATER RUNS TO IT OR THROUGH IT, WE DO IT!!!

"Great job. Excellent service."

Lance H on September 2024

Master Plumber with over 19 years experience for ALL Plumbing Needs! We pride ourselves on the quality work we provide, while delivering great customer service! Call or click to schedule an estimate today! Install, repair, and maintain pipes, valves, fittings, drainage systems, and fixtures on commercial and residential structures. Collaborate with general contractors, electricians, and other construction professionals. Follow building plans and blueprints. Respond to, diagnose, and resolve plumbing emergencies. IF WATER RUNS TO IT OR THROUGH IT, WE DO IT!!!

"Great job. Excellent service."

Lance H on September 2024


Avatar for Norse Construction, LLC

Norse Construction, LLC

476 Old Smizer Mill Rd
4.60(
62
)
Approved Pro

Norse Construction, LLC

476 Old Smizer Mill Rd
4.60(
62
)
Approved Pro
Customers say: True professional
31 local quotes requested
12 years of experience

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 Zoom Drain

Zoom Drain

1461 Larkin Williams Road
3.80(
5
)
Approved Pro

Zoom Drain

1461 Larkin Williams Road
3.80(
5
)
Approved Pro
Customers say: Terrific value
26 local quotes requested
30 years of experience

Cleaning and clearing, inspection, and repairs! Zoom Drain is a full service provider of residential & commercial drain cleaning and inspection. We’re best known for fast response times and our ability to provide focused solutions to drain & sewer problems. From sinks, toilets, and tubs to main drains, roof drains, storm drains, and anything else that carries water, we’ve got you covered. We also offer grease trap cleaning services and planned preventative maintenance.

"Extremely customer service experience. The representative I dealt with was not only unhelpful but also came across. As both judgmental and lacking professionalism when I asked clear questions about pricing I received vague misleading answers. They scheduled an appointment that I had agreed upon for one o'clock pm but no one show up or call. Instead I received a text for 1 o'clock pm.; When I called to let them know The situation and the pricing they have changed their answer from 1 -3pm and told me that there was a fee that would be applied. When I asked a follow up question the Rep. hung up on me. The overall behavior was unprofessional and extremely biased based on demographic that they choose not to served. I would expect more transparency, respect and communication."

Josetta S on August 2025

Cleaning and clearing, inspection, and repairs! Zoom Drain is a full service provider of residential & commercial drain cleaning and inspection. We’re best known for fast response times and our ability to provide focused solutions to drain & sewer problems. From sinks, toilets, and tubs to main drains, roof drains, storm drains, and anything else that carries water, we’ve got you covered. We also offer grease trap cleaning services and planned preventative maintenance.

"Extremely customer service experience. The representative I dealt with was not only unhelpful but also came across. As both judgmental and lacking professionalism when I asked clear questions about pricing I received vague misleading answers. They scheduled an appointment that I had agreed upon for one o'clock pm but no one show up or call. Instead I received a text for 1 o'clock pm.; When I called to let them know The situation and the pricing they have changed their answer from 1 -3pm and told me that there was a fee that would be applied. When I asked a follow up question the Rep. hung up on me. The overall behavior was unprofessional and extremely biased based on demographic that they choose not to served. I would expect more transparency, respect and communication."

Josetta S on August 2025


Avatar for Anton's Plumbing, Heating/Cooling & Energy Experts

Anton's Plumbing, Heating/Cooling & Energy Experts

950 Bolger Ct
4.67(
484
)
Approved Pro

Anton's Plumbing, Heating/Cooling & Energy Experts

950 Bolger Ct
4.67(
484
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
432 local quotes requested

Anton's has been in business for 43 years and maintains an A+ rating with the BBB. We have the highest Google rating in St. Louis. We offer manufacture rebates, and 0% financing for up to 60 months! We currently employ 72 team members who receive customer service training twice per week. Our service technicians have been professionally trained on our 6 step Anton's service system to ensure our customers receive the same GREAT service at a GREAT price each and every visit!! We provide upfront pricing and don't complete any repairs with out approval. We are the only company in St. Louis to offer lifetime warranty on repairs for our UP plan members!!!! Senior Discount- $10 off a service or $100 off complete new system Emergency Service phone number- 314-499-8400

"Did good work, fixed our loose plumbing quickly"

Griffin M on July 2025

Anton's has been in business for 43 years and maintains an A+ rating with the BBB. We have the highest Google rating in St. Louis. We offer manufacture rebates, and 0% financing for up to 60 months! We currently employ 72 team members who receive customer service training twice per week. Our service technicians have been professionally trained on our 6 step Anton's service system to ensure our customers receive the same GREAT service at a GREAT price each and every visit!! We provide upfront pricing and don't complete any repairs with out approval. We are the only company in St. Louis to offer lifetime warranty on repairs for our UP plan members!!!! Senior Discount- $10 off a service or $100 off complete new system Emergency Service phone number- 314-499-8400

"Did good work, fixed our loose plumbing quickly"

Griffin M on July 2025


Avatar for Tri-State Water, Power & Air

Tri-State Water, Power & Air

1656 HEADLAND DR
3.96(
24
)
Approved Pro

Tri-State Water, Power & Air

1656 HEADLAND DR
3.96(
24
)
Approved Pro
Customers say: Super punctual
354 local quotes requested
33 years of experience

In business since 1992, Tri-State prides itself on providing top notch services and products to it's many customers. Our Service Plumbing team is ready and willing to tackle your project - be the need immediate or not. Simply reach out and we will dispatch a technician immediately to provide a quote and solve your problem!

"Only rating 1 because it doesn't go lower. Had a new unit installed end of Sept 24. First time power goes out on 11/5, no electricity. When tri state sells you a product, they pitch their amazing customer service with all these guarnatees of knowing when your unit is out before you know and having someone there within 24 hours etc. Well, the first call we make we are told it will be the end of Nov to get someone out to look at it. 3 weeks. Nobody shows up. Then we get a call that says "your appointment on Dec 12 has been canceled and the earliest we can get to you is Jan 16th. This is 2.5 months wait to get service to fix a nearly $20k unit, that is upcharged because of the excellent service. You can't get anyone to answer your call. you wait on hold for 20 minutes, then have to leave a voicemail in which you will not get called back. Based on my experience, find someone else and pay less. Even if the service is bad, which it can't be worse than this, you save money! @kohler"

Jerry B on December 2024

In business since 1992, Tri-State prides itself on providing top notch services and products to it's many customers. Our Service Plumbing team is ready and willing to tackle your project - be the need immediate or not. Simply reach out and we will dispatch a technician immediately to provide a quote and solve your problem!

"Only rating 1 because it doesn't go lower. Had a new unit installed end of Sept 24. First time power goes out on 11/5, no electricity. When tri state sells you a product, they pitch their amazing customer service with all these guarnatees of knowing when your unit is out before you know and having someone there within 24 hours etc. Well, the first call we make we are told it will be the end of Nov to get someone out to look at it. 3 weeks. Nobody shows up. Then we get a call that says "your appointment on Dec 12 has been canceled and the earliest we can get to you is Jan 16th. This is 2.5 months wait to get service to fix a nearly $20k unit, that is upcharged because of the excellent service. You can't get anyone to answer your call. you wait on hold for 20 minutes, then have to leave a voicemail in which you will not get called back. Based on my experience, find someone else and pay less. Even if the service is bad, which it can't be worse than this, you save money! @kohler"

Jerry B on December 2024


Avatar for Roto-Rooter Plumbing & Water Cleanup

Roto-Rooter Plumbing & Water Cleanup

4806 Trade Access Blvd
4.48(
965
)
Approved Pro

Roto-Rooter Plumbing & Water Cleanup

4806 Trade Access Blvd
4.48(
965
)
Approved Pro
Customers say: Super punctual
478 local quotes requested
90 years of experience

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"Very professional service, and great customer service."

Janet H on April 2025

When you need an emergency plumber or a drain cleaner, call Roto-Rooter Plumbing & Water Cleanup. Your fast & reliable plumber can fix any plumbing problem, including sump pumps, toilet repair, faucet repair, faucet replacement, garbage disposals, water heaters, bathtubs, showers, and outside faucets. Roto-Rooter is best known for drain cleaning & sewer cleaning. We fix drain clogs, clogged toilets or sinks, blockage of main sewer lines, slow draining shower and bathtub drains, sewer lines and leaking or burst pipes. We also specialize in water damage restoration & water cleanup services. We can fix and clean up your flooded basement too. Roto-Rooter is a 24-hour plumber near you and provides emergency service.

"Very professional service, and great customer service."

Janet H on April 2025

...
Showing 1-10 of 228
Subcontractors questions, answered by experts

On average, the cost to transform your garage into a workshop is about $2,000. The overall project cost depends on the type of workshop you want to build and its size. Regardless of the type of workshop, you’ll still need basic workshop spaces and equipment such as a workbench, cabinets, and space for storage and for working.

  • Installing a new electrical meter box

  • Replacing your meter base

  • Replacing your service entrance cable 

The cost to install or upgrade an electrical meter box ranges from $100 to $650, including $50 to $250 for the unit. The meter base passes the power from your electric company to your panel. The cost to replace a meter base is roughly $50 to $250. 

Service entrance cables are electrical cables with multiple wires, bringing power from electrical companies to residential buildings. The cost to replace a service entrance cable ranges roughly from $1,000 to $1,500.

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.

General contractors typically manage home renovation or build projects that last more than a week and involve various skilled tradespeople. Some examples include building a new home or barn, adding an extension or garage, or carrying out major room remodels involving extensive plumbing, electrical, and structural changes.

Yes, you can finance new construction using a construction loan or a construction-to-permanent loan, or you can use a home equity line of credit or a cash-out refinance if you’re building a second home. Some mortgagors may have restrictions on DIY house builds, so be sure to check that you can get financing before starting your project.

The O Fallon, MO homeowners’ guide to subcontracting services

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