Cottleville blends historic charm with modern growth. From the original homes near Old Town Cottleville to the upscale developments along Motherhead Road and Heritage Crossing, this community takes pride in property values and curb appeal. Your roof is the most visible part of that investment.
We’ve been roofing homes in St. Charles County since long before Cottleville’s recent growth boom. We understand the architectural styles here—from traditional colonials to modern farmhouses—and we know which materials and colors complement the character of this community. Many Cottleville subdivisions have strict HOA guidelines for roofing materials, and we’re familiar with the approval processes.
When severe weather hits—and St. Charles County sees its share of spring hailstorms and summer wind events—you need a roofing contractor who responds quickly, documents damage thoroughly, and stands behind their work. Our 5-year workmanship warranty means we’re accountable long after the job is done.
Our St. Charles County office at 609 Westridge Dr in O’Fallon is just a few miles from Cottleville. When you work with Gallagher Bros, you’re working with neighbors who will still be here when you need us.
Premium Roof Replacement: Cottleville homeowners expect quality. We install architectural shingles from GAF, Owens Corning, and CertainTeed that offer superior wind resistance, longer lifespans, and the dimensional appearance that complements upscale homes. Every replacement includes a thorough deck inspection, ice and water shield in valleys and eaves, and proper ventilation assessment.
Storm Damage & Insurance Claims: Hail doesn’t discriminate by neighborhood. When a storm damages your roof, we handle the insurance process from start to finish. Our detailed documentation and experience working with adjusters ensures you receive fair compensation. We work with all major insurance carriers and can often identify damage that homeowners miss.
Roof Repair & Maintenance: Caught a leak early? Missing a few shingles after a storm? Targeted repairs can extend your roof’s life significantly when addressed promptly. We provide honest assessments—if a repair will solve the problem, that’s what we recommend. If your roof is nearing end of life, we’ll tell you that too.
Complete Exterior Services: Beyond roofing, we install and repair gutters, siding, and windows. Bundling exterior work often makes sense financially and ensures everything integrates properly.
Gallagher Brothers Construction serves homeowners throughout Cottleville and the 63376 zip code. Whether you’re near Historic Old Town, Thornhill, Whitmoor Country Club, or the shops and restaurants along Mid Rivers Mall Drive, we’re ready to help with your roofing project.
We also serve neighboring communities including St. Peters, O’Fallon, St. Charles, Weldon Spring, and Dardenne Prairie.
Schedule your free inspection: Call us at (314) 646-8015 or complete the form below. We’ll provide an honest assessment and transparent estimate—no high-pressure sales tactics.
EXCELLENT Based on 641 reviews Posted on Adam GoldmeierTrustindex verifies that the original source of the review is Google. I recently had the pleasure of working with Gallagher Bros Construction, and I can’t recommend them enough. From start to finish, the entire process was seamless and professional. The team was incredibly punctual, knowledgeable, and took the time to explain every detail of the project. It’s rare to find a company that combines such high-quality craftsmanship with genuine customer care. They left the job site spotless and the new roof looks fantastic. If you are looking for a roofing company that is honest, efficient, and does top-tier work, look no further than Gallagher Bros. They truly go above and beyond!Posted on Judy DeschlerTrustindex verifies that the original source of the review is Google. I dealt with Gallagher Bros. Construction for the 2025 damage to my home. My contact was Willie Wyninegar and I cannot say enough wonderful things about him. He was onboard with every aspect of my job. Very thorough and professional. Always courteous! They are an outstanding company to deal with and would recommend them to any one.Posted on David RussoTrustindex verifies that the original source of the review is Google. Great company, finished my roof in a timely manner with no nails left around the house!! Rob and Curtis were awesome to deal with!Posted on josh BartnickTrustindex verifies that the original source of the review is Google. The team at Gallagher made sure everything was 100% to our satisfaction and made sure all the insurance stuff was handled right. Kris and the rest of the guys make sure the job is done right and at a fair price.Posted on MjadeTrustindex verifies that the original source of the review is Google. They built my roof amazingly! They are very friendly and fast working while also doing it the correct way, Bradyn was amazing would definitely have them fix any more roofing/siding needs in the future!Posted on Adam BizzleTrustindex verifies that the original source of the review is Google. Gallagher Bros were great to deal with. They did a great job on my siding and roof install and knocked it out quickly. Brett was very helpful and transparent while helping me navigate through my insurance and scope of work needed to get the job done. I would recommend them to anyone looking for a quality install.Posted on Donna PoelkerTrustindex verifies that the original source of the review is Google. We are very pleased with Gallagher Bros. Service, from beginning to end. Brett did a wonderful job of explaining what our insurance covered, and what services Gallagher Bros. Would provide. The work was done well. I highly recommend this company.Posted on David DTrustindex verifies that the original source of the review is Google. Great craftsmanship and skill. Handled all the paperwork with the insurance company. Did exactly what they said they would and at the agreed price. No problems whatsoever. Couldn't be happier.Verified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more