Where we work: Staten Island, Brooklyn, Manhattan and Queens
We're based on Staten Island, and most of our work is here. We also take on a lot of roofing in Brooklyn, Manhattan and Queens. Pick your borough to see local services, prices and neighborhoods.
- Shop at 61 Appleby Ave, Staten Island 10305
- Emergency response 24/7
- Free inspections in every borough we serve
- 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.
Alter Phase Roofing Contracting is based on Staten Island and serves Staten Island, Brooklyn, Manhattan and Queens. Roof prices vary by borough: a 1,000 sq ft flat roof runs about $5,000–$13,000 on Staten Island, $5,500–$15,000 in Queens, $6,500–$17,000 in Brooklyn and $8,000–$22,000+ in Manhattan.
- 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
Choose your borough
Staten Island
Home base. Every neighborhood from St. George to Tottenville, with the fastest response.
Brooklyn
Brownstones, row homes and flat roofs across the borough.
Manhattan
Co-ops, condos, townhouses and commercial buildings.
Queens
Detached homes, attached rows and two-families.
Why borough matters for your roof
A roof is a roof, but the job around it isn't. Staten Island homes are mostly detached with driveways, so material and debris are easy to handle. Brooklyn and Manhattan buildings are attached, often with no driveway, sometimes in landmark districts, and frequently governed by co-op or condo boards. That's why the same flat roof costs more in Manhattan than in Staten Island, and why it pays to hire a contractor who works in your borough regularly.
What roofing costs
Averages from our own jobs. Your exact price comes in writing after a free inspection.
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 our 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!”
“I called for an estimate for a new roof. The price they quoted was way below two other estimates I received. I was also told that it would take 1-2 days to complete. Everything Alter Phase Contracting Inc promised was delivered. They gladly supplied me with their licensing and insurance information. The warranty is printed on my…”
“Just WOW! I expected that this would take several days, they got my new roof done in just 1 day. The guys did a thorough job, from set up to clean up. The price quoted was the price I paid, no gimmicks. True Staten Islanders. My roof looks great, couldn't be more happier. Would recommend to anyone who asks.”
“Marke and his team did an excellent job on replacing my roof! He and his brother came to my house, climbed up the roof to investigate the condition unlike other contractors which were only using a drone to take pictures. He gave me honest opinion and options for replacing my roof. Great communication and very easy to work with during…”
“I called a few roofers & Alter Phase was the only one that returned my call promptly & showed up the next day to give the estimate. They were very detailed in their explanation and immediately put me at ease. They showed up 3 days later and did the work in one day. Every worker on the job was courteous and friendly. My house now…”
“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…”
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.