Brooklyn roofing contractor for brownstones, row homes and more
Brooklyn roofs are mostly flat, mostly attached and mostly old. That means leaks at parapets and party walls, ponding water and decades of patches. It's the kind of roof we work on every week.
- Flat roofs: EPDM, TPO and modified bitumen
- Brownstones, row homes, mixed-use and co-ops
- Same-day emergency response for active leaks
- 5.0 from 154 reviews
GAF Certified®- 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 repairs and replaces roofs across Brooklyn, mainly flat roofs on brownstones, row homes and mixed-use buildings. A 1,000 sq ft flat roof replacement in Brooklyn typically costs $10,000–$17,000; flat roof leak repairs usually run $400–$1,200.
- 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
What makes Brooklyn roofs different
Mostly flat
Brownstones and row homes almost all have low-slope roofs: EPDM, TPO, modified bitumen or old built-up tar. They need different skills than shingle roofs.
Attached on both sides
Party walls, shared parapets and neighbor flashing are where most Brooklyn leaks start. Every repair has to tie in cleanly next door.
Parapets & coping
Brick parapets with cracked coping let water into the walls below. We repair the flashing and the cap together.
Ponding water
Decades of re-roofing leave low spots and clogged drains. We fix the slope, not just the membrane.
Access
No driveways and tight streets mean careful material handling and debris removal, which is part of why Brooklyn costs more than Staten Island.
Boards & landmarks
Co-ops, condos and historic districts come with approvals and paperwork. We provide the insurance certificates and documentation they ask for.
Brooklyn roofing services
- Flat roofing in Brooklyninstallation, repair and replacement for row homes and brownstones
- Roof repair in Brooklynleaks, flashing, parapets and storm damage
- Roof replacement in Brooklynfull tear-offs with new insulation and drainage where needed
- Commercial roofingstorefronts, mixed-use and multi-family buildings
- Skylightsand gutters
Brooklyn neighborhoods we serve
Bay Ridge · Dyker Heights · Bensonhurst · Bath Beach · Sunset Park · Borough Park · Kensington · Windsor Terrace · Park Slope · Prospect Heights · Gowanus · Carroll Gardens · Cobble Hill · Red Hook · Brooklyn Heights · DUMBO · Downtown Brooklyn · Fort Greene · Clinton Hill · Bed-Stuy · Crown Heights · Prospect Lefferts Gardens · Flatbush · East Flatbush · Midwood · Sheepshead Bay · Gravesend · Marine Park · Mill Basin · Flatlands · Canarsie · Bushwick · Williamsburg · Greenpoint.
For a detailed price breakdown, read our guide to roof replacement cost in Brooklyn.
What roofing costs in Brooklyn
Averages from our own jobs. Your exact price comes in writing after a free inspection.
New flat roof, installed · Brooklyn
Flat roof replacement by borough (≈1,000 sq ft)
Alter Phase Roofing Contracting job averages, updated October 1, 2026. Your exact price comes from a free on-site inspection.
Recent projects in Brooklyn
Our own crew on our own jobs. No stock photos.
TPO flat roof installation
Bay Ridge, Brooklyn 11209
EPDM roof install
Brooklyn, NY
Flat roof replacement
Brooklyn, NY
TPO flat roof
Brooklyn, NYFrom 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, 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 Brooklyn 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…”
Roofing: your questions, answered
Don't see yours? Call or text and you'll talk to someone who actually works on roofs.
(929) 370-1552Roofing: common questions
How much does a new roof cost in Brooklyn?
A typical 1,000 sq ft flat roof replacement in Brooklyn runs $10,000–$17,000. Costs are higher than Staten Island or Queens because of row-home access, attached buildings, brownstone details and, for co-ops and condos, board requirements. See our Brooklyn roof cost guide for the full breakdown.
Do you work on landmarked brownstones?
Yes. Buildings in historic districts such as Park Slope, Brooklyn Heights or Fort Greene may need Landmarks Preservation Commission approval for visible exterior work. We help you understand what applies before work starts.
Which Brooklyn neighborhoods do you serve?
All of Brooklyn, including Bay Ridge, Dyker Heights, Bensonhurst, Sunset Park, Park Slope, Windsor Terrace, Carroll Gardens, Cobble Hill, Brooklyn Heights, DUMBO, Fort Greene, Clinton Hill, Bed-Stuy, Crown Heights, Flatbush, Midwood, Sheepshead Bay, Marine Park, Canarsie, Bushwick, Williamsburg and Greenpoint.
Do you offer emergency roof repair in Brooklyn?
Yes. Call (929) 370-1552, 24/7. We respond the same day to active leaks with tarping or temporary repairs.
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.