J. Great Roofing & Siding was founded by Jose with a simple idea: do the job right, treat people honestly, and stand behind your work.
What started as a one-man operation on Long Island has grown into one of the area's most trusted roofing companies — without ever losing that personal touch. When you call J. Great, you're talking to the people who will actually be on your roof.
Over 25 years, we've replaced and repaired thousands of roofs across West Babylon, Babylon, Deer Park, Lindenhurst, Copiague, and communities all across Long Island. We've weathered every nor'easter, hurricane season, and summer storm this region throws — and we know exactly what your roof needs to survive them.
From tear-off to final shingle — watch our crew deliver the quality Long Island homeowners rely on.
Every decision we make — from materials to scheduling to cleanup — comes back to these three things.
We use premium GAF materials exclusively and employ only experienced, certified crews. No shortcuts. No exceptions.
We give you a detailed, itemized quote and stick to it. No hidden fees, no bait-and-switch. You know exactly what you're paying for.
We protect your property, clean up completely, and treat your home the way we'd treat our own. Every time.
Most full replacements are completed start-to-finish in a single day so your life isn't disrupted any longer than necessary.
Fully licensed, bonded, and insured in New York State. You're protected before, during, and after every project.
Roofing emergencies don't wait for business hours. Our 24/7 emergency line means help is always a phone call away.
GAF Master Elite status is awarded to only the top 3% of roofing contractors in the entire United States.
To earn and maintain this certification, J. Great Roofing must demonstrate proven workmanship, maintain proper licensing and insurance, and have a documented commitment to customer satisfaction. This isn't a badge you buy — it's one you earn through years of consistent, excellent work.
As a Master Elite contractor, we can offer you GAF's Golden Pledge® Lifetime Warranty — the strongest roofing warranty available anywhere, covering both materials and labor.
Don't take our word for it. Here's what Long Island homeowners say about working with us.
"Jose and his crew just installed a new roof and gutters on my home. They were a pleasure to deal with and went out of their way to make sure everything was completed correctly and in one day. Their pricing is fair and the quality of the material and workmanship is excellent."
"My roof looks FANTASTIC! My gutters reattached to perfection! My entire house looks great! Thank you J. Great Roofing (Jose and crew) for a job well done!"
"Such a great experience with J. Great Roofing! A friend recommended them and they did not disappoint. Great job. Great price. They cleaned up and were respectful of outdoor furniture — and they even finished early! Highly recommend!"
"J. Great replaced the back half of my roof 2 years ago. Today they returned and replaced a large flat roof section over my Garage and an added-on room. As always Jose and his team did an excellent job at an affordable price."