Flat roofing in Brooklyn: repair, replacement and new installs
Most Brooklyn roofs we work on are flat. We repair leaking seams and parapets, fix ponding water, and replace worn-out roofs on brownstones, row homes and commercial buildings across the borough.
- EPDM, TPO, PVC and modified bitumen
- Parapets, party walls and drains done right
- Cool-roof and NYC code requirements handled
- 5.0 from 154 reviews
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Get your free roof estimate
Step 1 of 3Takes 30 seconds. A real person from our team calls you back, usually within the hour.
A flat roof replacement in Brooklyn typically costs $6,500–$17,000 for about 1,000 sq ft, or roughly $5–$16 per sq ft depending on the system: EPDM $5–$12, TPO $9–$14, modified bitumen $9–$13. Flat roof leak repairs usually cost $400–$1,200. Most flat roofs last 20–30 years.
- Infrared leak detectionHidden moisture found, no guesswork
- 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
Flat roof services in Brooklyn
Flat roof replacement
Full tear-off of old layers, deck repairs, tapered insulation where drainage is poor, new membrane and flashing.
Flat roof repair
Open seams, blisters, punctures and failed flashing repaired with materials compatible with your existing roof. We find hidden leaks and wet insulation with an infrared (thermal imaging) camera, so we repair the real entry point.
Parapet & coping repair
Parapet flashing and coping caps resealed or rebuilt, the most common source of leaks on Brooklyn row homes.
Drainage fixes
Clogged drains, undersized scuppers and ponding areas corrected so water leaves the roof.
New installations
Flat roofs for additions, rear extensions and new construction, built to code.
Emergency repairs
Same-day tarping and temporary repairs for active leaks. Call (929) 370-1552.
Which flat roof system is right for your building?
EPDM (rubber), $5–$12/sq ft. The workhorse of Brooklyn row homes. Affordable, flexible in the cold, easy to repair.
TPO, $9–$14/sq ft. White and reflective, so top floors stay cooler. Heat-welded seams. Our most popular choice for larger roofs and mixed-use buildings. More in our TPO roofing guide.
Modified bitumen, $9–$13/sq ft. Multi-ply and tough. Best where people walk on the roof or HVAC is serviced often.
PVC, $10–$16/sq ft. For restaurant exhaust areas and roofs exposed to grease or chemicals.
Signs your Brooklyn flat roof needs attention
- Water still standing 48 hours after rain
- Blisters, bubbles or cracks in the surface
- Lifted seams or membrane pulling away at the walls
- Cracked parapet coping or loose flashing
- Stains on top-floor ceilings, especially near walls
- A roof that's 20+ years old or covered in patches
Deciding between fixing and replacing? Read flat roof repair vs. replacement in NYC, or see the full Brooklyn roof replacement cost guide.
Serving every Brooklyn neighborhood
Bay Ridge, Dyker Heights, Bensonhurst, Sunset Park, Park Slope, Carroll Gardens, Cobble Hill, Brooklyn Heights, Fort Greene, Clinton Hill, Bed-Stuy, Crown Heights, Flatbush, Midwood, Sheepshead Bay, Canarsie, Bushwick, Williamsburg, Greenpoint and everywhere in between.
What flat 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 26, 2026. Your exact price comes from a free on-site inspection.
- Tear-off, cleanup and disposal
- Up to 50-yr material + 25-yr workmanship warranty
- Permit filed if your job needs one
Final price depends on layers to remove, deck condition and access. We confirm it in writing after a free inspection.
Get my exact price, free or call (929) 370-1552Might only need a repair? Most roof repairs cost $300–$1,200. We'll tell you honestly. Roof repair
Recent projects in Brooklyn
Our own crew on our own jobs. No stock photos.
TPO flat roof installation
Bay Ridge, Brooklyn 11209
Crew installing a flat roof
Brooklyn, NY
Modified bitumen flat roof
Brooklyn, NY
EPDM roof install
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, 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 Brooklyn customers say
“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 assess the issue, which I really appreciated. The team was professional, polite, and their pricing was extremely fair. Because of the weather, the job required multiple visits but their communication was consistent, clear, and reliable throughout. They always showed up exactly when they said they would, which is rare these days. It's hard to find a trustworthy company for major home repairs, especially when so many are overpriced and underdeliver. This team exceeded expectations, and I'll absolutely continue to use them in the future.”
“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…”
“The roofing job was completed with exceptional skill and professionalism. The team arrived promptly and conducted a thorough assessment of the roof's condition, identifying areas that required repair. They replaced damaged shingles, sealed leaks, and ensured proper ventilation, all while maintaining a clean worksite, I recommend…”
“Everyone I dealt with at this company was quick to reply, professional and efficient. I reached out them one evening due to a leak in my roof. They coordinated with me immediately and made an appointment for a free quote the following morning. By the following evening, my roof was repaired. They spoke with us in morning to go over…”
“My garage roof is beautiful. I watched as Mike and crew worked, observed the great care they took in addressing every detail. I have never seen work performed with a more conscientious and professional regard. They were absolutely fastidious in the cleanup process. They even offered to make small cement repairs that they noticed…”
Flat roofing: your questions, answered
Don't see yours? Call or text and you'll talk to someone who actually works on roofs.
(929) 370-1552Flat roofing: common questions
How long does a flat roof last in Brooklyn?
EPDM, TPO and modified bitumen roofs typically last 20–30 years and PVC 25–35 years. Brooklyn's freeze-thaw winters, hot summers and ponding water are what shorten them, so drainage and twice-yearly inspections matter.
What's the best flat roof for a Brooklyn brownstone?
EPDM is the most cost-effective and very common on row homes. TPO's white surface keeps top-floor apartments cooler and helps meet NYC cool-roof rules. Modified bitumen is best if you use the roof or have equipment on it. We recommend based on your building and budget.
Do I need a permit to replace a flat roof in Brooklyn?
Like-for-like covering replacement often doesn't need a DOB permit, but changing the roofing system, replacing the deck, commercial buildings and work triggering Local Laws 92/94 do. Landmarked buildings may also need LPC approval. We check and file when required.
Can I put solar panels or a roof deck on my flat roof?
Yes. Flat roofs are ideal for solar and roof decks, but the roof should be in good condition first. Replacing an aging roof before installing solar avoids paying to remove and reinstall panels later.
Why does water pond on my flat roof?
Clogged drains or scuppers, sagging decking, or layers of old roofing that created low spots. We fix it with drain repairs, tapered insulation or crickets that direct water off the roof.
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.