Licensed & insured · NYC DOB General Contractor #017044 · DCWP HIC #1309188
Serving Manhattan, Brooklyn & Queens since 1984
GM
G.M. Construction & Waterproofing Corp.
Call (212) 390-1249
Scaffolding erected against a New York City building at sunrise
Established 1984 · New York City

Rigging. Roofing. Waterproofing.

Four decades of exterior work on New York buildings — hung, sealed, pointed and signed off. Licensed, DOB-registered, and safety-registered, with 276 permits filed since 1990.

Get a Free Estimate Call (212) 390-1249
Emergency leak or storm damage? Call and we'll get someone on the roof.
1984Year established
276Permits filed since 1990
A+BBB rating
4Active NYC licenses
What we do

Three trades, one crew, one number to call

Most exterior problems in this city are the same problem wearing different clothes: water getting in where it shouldn't. We handle the access, the repair and the seal — so you're not coordinating three contractors and four schedules.

Worker on scaffolding high on a building facade

Rigging & Access

Getting to the work safely is half the job in New York. We handle the access so the repair can actually happen.

  • Suspended scaffold & swing stage
  • Pipe scaffold & sidewalk sheds
  • Facade access for inspections
  • DOB-registered site safety
Roofer working on a flat roof

Roofing

New roofs, tear-offs and the leak that's been coming back every spring for three years.

  • Flat & low-slope roof systems
  • Roof replacement & recover
  • Leak diagnosis & repair
  • Drains, flashing & parapet walls
Mason applying mortar to a brick wall

Waterproofing

Sealing the building envelope, above grade and below — the work that stops the damage instead of repainting over it.

  • Exterior & basement waterproofing
  • Brick pointing & masonry repair
  • Facade coatings & sealants
  • Lintel & sidewalk work

Also handled in-house

  • Facade restoration & Local Law 11 / FISP
  • Brownstone restoration
  • Stucco repair
  • Parapet wall rebuilds
  • High-pressure cleaning
  • Violation removal
  • Concrete & sidewalk
  • General contracting
Why GM

The paperwork is as solid as the work

Anyone can put a ladder on a truck. In New York, the question is whether the contractor is registered, insured, and still going to be here when the violation comes back around.

  • Registered where it countsNYC Department of Buildings General Contractor #017044 and GC Safety Registration #027193, plus DCWP Home Improvement Contractor licensing.
  • 276 permits since 1990A filed, inspected, public track record across Manhattan, Brooklyn and Queens — not a portfolio of stock photos.
  • Forty-plus years in the same cityEstablished 1984. We know which buildings, which inspectors, and which repairs actually hold up in this climate.
  • One accountable crewAccess, repair and seal handled by the same company, so nobody points at the other guy when it leaks again.
Building facade under restoration with scaffolding
40+Years in NYC
How it goes

From your call to a dry building

01Call or send photos

Tell us what you're seeing — the stain, the drip, the violation notice. Photos speed everything up.

02On-site look

We come out, get eyes on the actual condition, and tell you what's causing it rather than what's easiest to sell.

03Written scope & price

A clear scope with a fixed number. You know what's included before anyone sets up.

04Access, repair, seal

We rig it, fix it, seal it, and clean up. Permits and inspections handled where the job calls for them.

Our work

Exterior work, up close

Scaffolding erected on a building facade Crew working from scaffolding Two roofers working on a sloped roof Trowel and mortar work on a brick wall Brick facade detail Interior structural repair in progress

Representative images. Project photos from GM job sites to be added.

Service area

If it's within the five boroughs, we've probably been on that block

Based on Avenue B in Manhattan, working across the city on brownstones, walk-ups, co-ops and mixed-use buildings.

  • Manhattan
  • Brooklyn
  • Queens
  • Stuyvesant Town
  • Bellerose
New York City building facade
Get in touch

Tell us what's going on with the building

Call for anything urgent. For everything else, send the details and we'll come back with next steps.

Or call (212) 390-1249 · we answer.
Request received

G.M. Construction & Waterproofing

☎ Call Now ✉ Text Us
GM Front DeskReach us right now
Fastest way to get a look at the building is to call. Photos by text help us quote it accurately.
Call (212) 390-1249 Text us photos Email the office Request an estimate online