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Gallagher Bros Construction

Roofers in O'Fallon, Missouri
Ranked #4 in O'Fallon | Grade B+
5.00 (10 reviews)

Gallagher Bros Construction

Local roofing contractor in O’Fallon offering shingle replacement, storm-damage repairs, and roof inspections backed by clear communication and efficient scheduling Serving homeowners across O'Fallon, Missouri.

Gallagher Bros Construction business photo 1 - Roofing in O'Fallon
Gallagher Bros Construction business photo 2 - Roofing in O'Fallon
Gallagher Bros Construction business photo 3 - Roofing in O'Fallon
Gallagher Bros Construction business photo 4 - Roofing in O'Fallon
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Why Homeowners Choose This Business

Homeowners cite quick response after severe weather, straightforward updates throughout the job, and tidy job sites. Projects are often completed in a single day when scope allows, with attention to nails and debris during final cleanup Local experience that helps homeowners across O'Fallon, Missouri compare a more region-aware provider.

Service Area

Serving O’Fallon, nearby St. Charles County neighborhoods, and portions of the St. Louis metro based on project needs Serving homeowners across O'Fallon, Missouri and nearby surrounding areas.

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Listing details

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  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

A quick local comparison based on review strength, business detail, and local service fit.
  • Maintains a competitive standing in this market.
  • Performs at or above the local average rating.
  • Shows strong customer satisfaction signals based on review quality and volume.

Services Covered

  Renovation Services
  Roofing Contractor
  Asphalt shingle roofing
  Emergency Roofing
  Roof Inspection
  Roof replacement
  Installations
  Roof repair
  Storm Damage Roofing
  Roof Leak Repair
  Hail Damage Roof Repair
  Wind damage roof repair
  Residential roofing
  Insurance Claim Assistance

Asphalt shingle roof replacement, roof leak repair, storm and wind damage assessment, roof inspections, and related insurance coordination.

Reviews

Customer Reviews

Zane
Gallagher Bros killed it! I was jumping through hoops to find a company to come do a residential shingle job in St. Charles, and Curtis got it done! Kinda dumb how hard it is to find good roofing people, but they were crazy fast for a fair…
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Gallagher Bros killed it! I was jumping through hoops to find a company to come do a residential shingle job in St. Charles, and Curtis got it done! Kinda dumb how hard it is to find good roofing people, but they were crazy fast for a fair price. Super nice guy and team to work with
Jeremy Rother
After our roof was damaged in the tornado that came through St. Louis on May 16, 2025. I talked to a couple roofing companies before choosing Gallagher roofing. Curtis at Gallagher Made us feel like a high priority …brought in a great team…
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After our roof was damaged in the tornado that came through St. Louis on May 16, 2025. I talked to a couple roofing companies before choosing Gallagher roofing. Curtis at Gallagher Made us feel like a high priority …brought in a great team and did the job all in one day with an exceptional cleanup at the end! I was super paranoid about nails being left In the driveway after a previous experience with another roofing company, but I didn’t find anything like that with Gallagher. Thanks for a job well done, and I will use them again in the future.
River
Fantastic experience with Gallagher Bros. The owners Jake and Curtis are stand up guys and will go the extra mile to make sure the job gets done right. Would highly recommend.
Matt McCormick
This past fall was especially stressful with all the weather damage. Gallagher took a lot of that stress away. Prompt, honest, great quality and a fair price. They helped us through the process with their knowledge and attention. I spoke…
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This past fall was especially stressful with all the weather damage. Gallagher took a lot of that stress away. Prompt, honest, great quality and a fair price. They helped us through the process with their knowledge and attention. I spoke with Curtis a number of times and really appreciated his straightforward approach. It’s exciting to hear they opened an O’Fallon office. I now consider Gallagher my roofing partner.
Connor S.
I cannot speak highly enough about Gallagher Bros. They did a fantastic job with my roof. The team was very professional and a pleasure to work with. They did a great job helping me work with the insurance process. The roof itself was insta…
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I cannot speak highly enough about Gallagher Bros. They did a fantastic job with my roof. The team was very professional and a pleasure to work with. They did a great job helping me work with the insurance process. The roof itself was installed quickly and well done. I highly recommend choosing Gallagher Bros. for your next project!

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Frequently Asked Questions

They primarily handle residential asphalt shingle roof replacement, repairs, and storm-damage assessments. Customers also mention inspections and help coordinating roof claims with insurers.

Reviews suggest they respond quickly following severe weather and can complete some full replacements in a single day. Actual timing depends on material availability, crew scheduling, and the extent of damage.

Several reviewers note the team helped them work through the insurance process. They can document roof conditions and communicate scope, though final coverage decisions rest with your carrier.

Crews typically protect landscaping, remove old materials, install the new system, and perform a detailed cleanup. Many customers highlight careful magnet sweeping to reduce the chance of stray nails.

They serve O’Fallon and surrounding communities in St. Charles County and parts of the St. Louis metro. Availability may vary by project size and schedule—call to confirm.
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Opening Hours

  • Monday 8:00 AM – 5:00 PM
  • Tuesday 8:00 AM – 5:00 PM
  • Wednesday 8:00 AM – 5:00 PM
  • Thursday 8:00 AM – 5:00 PM
  • Friday 8:00 AM – 5:00 PM
  • Saturday 9:00 AM – 3:00 PM
  • Sunday Closed

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Business Details

Business Rating
5.00 (10 reviews) Featured BusinessPro Listing
Address
609 Westridge Dr B, O'Fallon, MO 63366
Business Type
Roofing Contractor
Website
https://gallagherbrosconstruction.com/
City Page
Roofers in O'Fallon, Missouri

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