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About
Gillean Brothers Roofing LLC is a Denton-based roofing contractor at 525 Fort Worth Dr, Suite 101, Denton, TX 76201. The Denton County location is confirmed by the company's own website, its BBB profile, its Yelp listing and its Denton Chamber of Commerce membership record. The BBB profile also notes a second suite in the same building, Suite 201.
The company says on its About page that it was founded in 2017 by Dan Gillean, who had been working with his father as a general contractor and noticed how often property owners had no idea their roofs were failing. BBB records a date of incorporation of 28 February 2018 and accreditation since 4 December 2017, with Daniel Gillean listed as owner. Work covers roof repair, replacement and restoration, metal roofing, flat roof repairs, gutter installation and insurance claim assistance, residential and commercial, across Denton and the wider Dallas Fort Worth metroplex. The company's own site publishes hours of Monday to Saturday 7:30am to 5pm, while the BBB record shows 8am to 5pm.
The company describes itself on its own website as a GAF Certified contractor able to offer the GAF System Plus warranty. GAF's contractor directory blocked automated verification, so treat that as company-stated until you check it yourself on GAF's own locator. Gillean Brothers also appears on the City of Frisco contractor register, registration no. R25-1601, first registered in 2025. Frisco publishes no status or expiry for these registrations, so ask the company to confirm its registration is current.
Highlights
Long-established for a roofer in this register: founded 2017 by Dan Gillean and BBB accredited since December 2017.
Genuinely local to Denton, with a Fort Worth Drive office, a Denton Chamber membership and Best of Denton recognition.
Offers metal and flat roofing alongside shingle work, so commercial and residential both fit.
States GAF Certified status and the GAF System Plus warranty, which you should confirm on GAF's own locator.
Family-run and second generation: the founder came up working with his father as a general contractor.
Serving Denton, Denton County, Texas and 2 more areas shown on the map.
Insurance & credential verification
Texas does not issue a state roofing license, so we verify companies the way homeowners actually can: confirming insurance coverage, checking RCAT (Roofing Contractors Association of Texas) status, and checking city or county registration where the local jurisdiction requires one. Every credential below links to the actual issuing organization's own public lookup — don't just take our checkmark for it. Always ask for a current certificate of insurance before signing any contract.
CompanyGillean Brothers Roofing
InsuranceNot verified by us (we hold no certificate for this company — ask them for a current COI before signing)
RCAT statusNot listed
City/county registration
Registered — Frisco #R25-1601Check the registry ↗Contractor registration, City of Frisco, first registered 17 June 2025. Confirmed against the city register. The city does not publish an expiry date for these registrations, so ask the company to confirm its registration is still current.
RegionDenton
Confirm this yourself: ask the company for their certificate of insurance (COI). Note that RCAT's Licensed Roofing Contractor credential (CRRL, RRL or CRL) is earned and held by a named individual at a company, not by the business itself, which is why we name that person above where we know it; Texas issues no company roofing license at all. RCAT and NTRCA status can be checked in their own public directories (RCAT, NTRCA) — use the "Licensed"/"Accredited" filter to see more than plain membership. GAF's contractor verification tool and Owens Corning's Texas locator confirm those tiers directly; CertainTeed doesn't offer a comparable self-serve lookup, so ask to see that certificate in person. BBB accreditation and rating are on bbb.org. Houston's own published registered-roofer list is years out of date, so it isn't cited here at all — confirm registration by contacting the city directly. Corpus Christi's STAR program has its own online contractor registry — for any other city or county registration claim, confirm directly with that jurisdiction's permit office.
Certifications
BBB Accredited Business (accredited December 2017, A rating)Verify on BBB ↗
GAF Certified Contractor with GAF System Plus warranty (company-stated on gbrothersroofing.com; not independently verified, GAF's contractor directory blocked automated access)Company-reported — ask to see the certificate
Denton Chamber of Commerce memberCompany-reported — ask to see the certificate
Earned from Gillean Brothers Roofing's insurance verification, live Google rating, and standing in Denton. Every badge links back to this profile so anyone can confirm it, and it updates automatically if the underlying status changes.
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Frequently asked
Is Gillean Brothers Roofing licensed by the state of Texas?
Texas issues no state roofing license, so no roofer in Texas holds one. What is verifiable is insurance, city registration and voluntary credentials. Ask for a certificate of general liability and workers compensation insurance and confirm it with the agent who issued it.
Is the Denton address confirmed?
Yes. 525 Fort Worth Dr, Suite 101, Denton, TX 76201 appears on the company's own website, its BBB profile, its Yelp listing and its Denton Chamber of Commerce record. Denton is the county seat of Denton County. The BBB record also notes a second suite, 201, in the same building.
Is the GAF certification verified?
It is stated by the company on its own website, along with the GAF System Plus warranty. GAF's contractor directory blocked our automated check, so we report it as company-stated. Verify it yourself on GAF's contractor locator, since manufacturer certifications can lapse.
Is the company an RCAT member?
A search of the RCAT directory returned no record for this company. RCAT membership is voluntary and its absence is not a mark against a roofer. Keep in mind that plain RCAT membership and the separately earned RCAT Licensed Roofing Contractor credential are different things.
When was the company founded?
Its own About page says 2017. The BBB record gives a date of incorporation of 28 February 2018 and BBB accreditation from 4 December 2017. The likely reading is that the business started trading in 2017 and the LLC was formed shortly after.
What are its hours?
The company's own site publishes Monday to Saturday 7:30am to 5pm, closed Sunday. The BBB record shows Monday to Saturday 8am to 5pm. Call ahead if the difference matters.
Why does hail dominate roofing decisions in Denton County?
Denton County sits in the North Texas hail corridor, where severe storms damage roofs on a regular cycle. Class 4 impact-rated shingles are tested to resist hail better than standard shingles, and many Texas insurers give a premium discount for them. Ask your carrier what the discount is before choosing a product.
Should I file an insurance claim for hail damage?
Compare the estimated repair cost with your wind and hail deductible, which is often a percentage of the dwelling coverage in Texas rather than a fixed dollar figure. Have the damage documented first. It is illegal in Texas for a contractor to waive, rebate or absorb your deductible, so walk away from anyone who offers.
Who handles the permit in Frisco or Denton?
Texas has no statewide building code enforcement, so permitting and inspections are set city by city. Frisco requires the contractor to be on its register before issuing permits or inspections. Make the contract say the contractor pulls the permit and schedules the inspection.
What should I ask before signing a roofing contract?
Ask for the shingle brand and product line in writing, the full scope including decking and underlayment, the workmanship warranty length and who backs it, proof of general liability and workers compensation insurance confirmed with the agent, whether crews are employees or subcontractors, and a payment schedule that is not fully front-loaded.
