About Grandmark
Grandmark Service Company was founded on a simple belief — that California homeowners deserve honest work, lasting solutions, and proof that the job was done right. 25+ years later, that belief drives everything we do.
We didn’t start Grandmark to build a company. We started it to fix a broken industry.
We saw the same problem in every home we worked on — and decided to fix it for good.
Two brothers, both in the trades, kept seeing the same pattern: homeowners paying good money for roofing and HVAC work, only to face the same problems months later. Leaks that came back. AC systems that never ran right. Contractors who collected the check and disappeared.
The root cause was always the same. Nobody was treating the home as a system. A roofer fixed the roof. An HVAC tech replaced the unit. Nobody connected the two — and the homeowner paid the price every time.
We built Grandmark to be the contractor we wished existed. One that treats your roof, air, and comfort as one interconnected system — and stands behind every job with video proof.
What started as a roofing company in Fresno grew into something no other contractor in Central California was doing: roofing, HVAC, and solar coordinated by one team — ducts replaced through the open roof, every penetration sealed by a roofer, and video documentation on every single job.
THE BEGINNING
Two brothers launch Grandmark Roofing in Fresno, CA — committed to ethical work and lasting solutions in an industry full of shortcuts and repeat callbacks.
The insight
After seeing the same roof failures traced back to HVAC penetrations and dirty ducts, Grandmark adds air conditioning — treating the home as one complete system for the first time.
Full system scope
Solar panel removal and reinstall added to roofing. Duct replacement through open roof decks becomes standard. Video documentation on every job — before and after, no exceptions.
Today — 5 markets, one standard
25+ years. 1,200+ reviews. GAF Master Elite. Bosch Authorized. BBB A+. Five offices across Central & Northern California. Still family owned. Still the same mission.
Our mission hasn’t changed since the day we started.
Every decision — which trades we offer, how we train crews, how we handle a complaint — comes back to three values we’ve held since day one.
Honest work over easy money.
We don’t quote what we assume — we quote what we find. Every recommendation is backed by a video inspection you watch before we start. If we can’t show you why, we don’t recommend it.
Lasting solutions, not temporary patches.
Most contractors profit from repeat callbacks. We built Grandmark to break that cycle — by treating the real cause, not the symptom, and standing behind the work long after we leave.
Proof, not promises.
Anyone can say they do good work. We put it on camera. Pre-job inspection and post-job completion video on every job — a permanent record of exactly what was done, and why.
What makes Grandmark different from every other contractor in California.
These aren’t marketing claims. They’re the decisions we made because they’re the right way to do the job — and they’re why our jobs don’t come back.
01. We treat your home as one system — not three separate jobs.
Roof, HVAC, and solar are physically connected. We’re the only contractor in Central California that coordinates all three under one team — so nothing gets missed between trades.
02. We replace ducts through the open roof deck — clean, no ceiling cuts.
When the deck is open, it’s the best time to access your ducts. We do it right — no contamination inside your home, no ceiling damage, no shortcuts.
03. Our roofers seal every HVAC penetration — not the AC tech.
Every penetration on every HVAC job is sealed by a professional roofer. Not caulked by the AC tech on his way out the door. This is why our jobs don’t come back.
04. Video proof on every job — before and after, no exceptions.
Every job documented from first inspection to final seal. You watch it yourself — roof, ducts, penetrations, solar panels — all on camera, all yours to keep forever.
What 25+ years of doing the right thing looks like.
Grandmark did an amazing job fixing our Roof and Duct work we needed done. Greatly appreciate them and recommend them 10/10 ! Thank you for everything making our home look great
Adrian Espinoza
Fresno, CA
They not only did everything they said they would do in the estimate, they went above and beyond with the repairs on the roof and came out on NEW YEARS DAY to do the job!
I would highly recommend GRAND MARK ROOFING to anyone looking for any type of roofing needs!
Steve larson
Sacramento, CA
David provided me with an estimate & video of tile roof issue. Although Grandmark Service Co. cannot do a small section repair that I need David did a good job of explaining the situation.
Nancy Silva
Bakersfield, CA
Ready to work with a contractor
you can actually trust?
Free estimate for roofing and solar. Diagnostic-first for HVAC. Video proof from start to finish. 25+ years of family-owned service across California.