Commercial roofing on Staten Island that keeps your business open
Stores on Forest Avenue and Hylan Boulevard, offices, restaurants, warehouses and mixed-use buildings: we repair, replace and inspect commercial flat roofs across Staten Island, and plan the work so your customers and tenants barely notice.
- TPO, EPDM, PVC and modified bitumen systems
- Certificates of insurance and written scopes on request
- Work scheduled around your hours and tenants
- 5.0 from 154 reviews
GAF Master Elite®- Lic. #2129904-DCWP
Get your free roof estimate
Step 1 of 3Takes 30 seconds. A real person from our team calls you back, usually within the hour.
Commercial flat roofs on Staten Island typically cost $9–$16 per sq ft to replace (TPO $9–$14, PVC $10–$16) and most leak repairs run $400–$1,500. Alter Phase Roofing Contracting repairs, replaces and inspects commercial roofs from our base on Staten Island, and answers emergency calls 24/7.
- Free inspection with photosYou see exactly what we see
- Written price in 24 hoursItemized, no pressure
- Most roofs done in 1 dayTear-off to cleanup
- Up to 50-yr warrantyPlus 25 yrs on workmanship
Commercial roofing services
Commercial roof repair
Seams, punctures, ponding, flashing and storm damage, found at the source and fixed with a written scope.
Commercial roof replacement
Tear-off or recover with TPO, EPDM, PVC or modified bitumen. Permits and code requirements included.
Commercial roof inspections
Photo condition reports for budgeting, buying a building, insurance and preventive maintenance.
Emergency service
Active leak over inventory or tenants? We answer 24/7 and make the roof watertight the same day.
Buildings we work on
- Retail stores and restaurantsincluding PVC roofs near kitchen exhaust
- Offices and medical buildings
- Mixed-use buildingswith storefronts below and apartments above
- Multi-family, co-op and condo buildings(see property managers & HOAs)
- Warehouses and light industrial
- Churches, schools and community buildings
Why commercial roofs fail early
Most commercial roofs we're called to don't fail because of the membrane. They fail because water isn't leaving the roof (clogged drains, low spots), flashing at parapets and equipment curbs wasn't detailed properly, or small problems were left for years. On Staten Island, wind off the harbor and salt air on the East and South Shores add to the wear.
Twice-yearly inspections and quick repairs are the cheapest way to get the full 20–30 years out of a flat roof. A small seam repair costs a few hundred dollars. Wet insulation under the whole roof can mean a replacement.
What owners worry about, answered
Price
You get a written, itemized scope before anything starts. If a repair will buy you years, we'll say so instead of quoting a new roof.
Disruption
We work on the roof, stage materials around your deliveries, protect entrances and clean up every day.
Paperwork
Certificates of insurance, DOB permits, cool-roof rules and Local Law 92/94 checks are handled before work begins.
Warranty
Manufacturer system warranties plus our own workmanship warranty, in writing.
Why Staten Island businesses call us
Alter Phase Roofing Contracting is family-owned, with 19+ years in roofing. Owner Marke is part of every job, and the work is done by our own crew, not subcontractors. We're a GAF Master Elite® contractor, BBB Accredited, and rated 5.0 stars across 154 reviews, 109 of them on Google.
We work in St. George, Port Richmond, New Springville, Travis, Dongan Hills, New Dorp, Great Kills and everywhere in between.
Next step: call (929) 370-1552 to book a roof inspection with photos. You'll usually have a written estimate within 24 hours. Office hours are Mon–Fri 8–8 and Sat 8–5; emergencies 24/7.
What commercial roofing costs on Staten Island
Averages from our own jobs. Your exact price comes in writing after a free inspection.
New flat roof, installed · Staten Island
Flat roof replacement by borough (≈1,000 sq ft)
Alter Phase Roofing Contracting job averages, updated October 26, 2026. Your exact price comes from a free on-site inspection.
From first call to finished roof.
No pushy salespeople and no surprise bills. Every job follows the same four steps.
- Fast scheduling
We inspect your roof
We climb up, scan for hidden leaks with an infrared camera, find the real cause and take photos so you see exactly what we see.
- Within 24 hours
You get a written quote
Clear options, repair or replace, with materials, cleanup and permits itemized. No pressure.
- On your schedule
Our own crew does the work
Marke is part of every job. We protect your property and clean up every day.
- Final walkthrough
Warranty in writing
Up to 50 years on materials and up to 25 years on our workmanship, handed to you.
What Staten Island customers say
“Called them up thinking I needed a new roof and gutters. They stopped by the same day, gave me an assessment of everything and it turns out the roof was repairable. They didn't try to pressure me into any unnecessary work. Just simply he gave me a couple of prices depending on what I decided to do. They were able to schedule the job quickly for a few days later and by the middle of the afternoon everything was done and it looks great!”
“10/10 would recommend! This is the second time I've used this company, and they've been excellent both times. The first time was a few years ago for a full shingle replacement. Most recently, I called them back to repair my flat roof and gutter system after a rough winter caused pooling and a leak. They came out the very next day to…”
“Alter Phase Roofing Contracting is a very good company. My new roof they installed just in one day, very professional and responsive. Clean very nice after the job and very friendly. The new roof has withstood several heavy rainstorms without any leaks. They are very respectful to come back inspected whole roof to make sure no any…”
“Quick, reliable and does OUTSTANDING work. We had a leak on our roof and made calls and left messages. They were the only company that called me back with in 10 min, they gave me an appointment the same day to come out and check out our roof. When we agreed to use them they were back here in 2 days to replace the roof and did an…”
“Marke and his team did an outstanding job replacing the roof on my 3 story house. From the quick estimate, to the finished product, they took pride, protected my house and property 100%. Marke also found a few bad spots, showed me and kept me informed as repairs were made. There were NO HIDDEN CHARGES!! I can't say enough about them.…”
“I had a great experience with this roofing construction company. The team was professional, reliable, and very knowledgeable from start to finish. They arrived on time, explained everything clearly, excellent work from beginning to end! I'm very happy with the results and would definitely recommend this roofing company to anyone who…”
Commercial roofing: your questions, answered
Don't see yours? Call or text and you'll talk to someone who actually works on roofs.
(929) 370-1552Commercial roofing: common questions
What is the best roof for a commercial building on Staten Island?
For most commercial flat roofs, TPO offers the best balance of cost, energy savings and durability. PVC is better for restaurants or roofs exposed to grease and chemicals, and modified bitumen where there's heavy foot traffic. We recommend based on your building, how it's used and your budget.
Can you work while our business stays open?
Yes. Nearly all commercial roofing happens on the roof. We plan noisy work, deliveries and material staging around your hours and keep entrances and sidewalks safe.
Do you provide certificates of insurance?
Yes, on request and before work starts, naming your company, building owner or management company as needed. We're licensed with NYC DCWP (#2129904-DCWP) and fully insured.
How often should a commercial flat roof be inspected?
Twice a year, in spring and fall, and after major storms. Regular inspections with photo reports let you budget for repairs instead of reacting to leaks.
Do commercial roof replacements need a DOB permit?
Almost always. Commercial replacements typically need a DOB permit, and many also trigger NYC cool-roof and sustainable roofing rules. We handle the filing and include permit costs in the estimate.
Get an honest answer about your roof.
Free inspection, photos of what we find and a written quote. If it only needs a repair, we'll tell you.
Prefer to talk? Call or text, emergencies 24/7:
(929) 370-1552- Family-owned, Staten Island based
- Owner on every job
- Written warranties, permits handled
Get your free roof estimate
Step 1 of 3Takes 30 seconds. A real person from our team calls you back, usually within the hour.