Landmark townhouses on the Upper East Side, prewar co-ops, Harlem facades, SoHo lofts, a church in Hamilton Heights. Nine Manhattan projects, each with its own approvals.
Manhattan is where the approvals are heaviest and the openings are most valuable. A townhouse on East 64th Street has a landmarked front and an unregulated rear, so one building gets two kinds of window. A prewar co-op on East 69th Street has a board with a window specification and an alteration agreement that takes six weeks. A facade in Harlem is a full package — windows, corner curtain wall, panels, canopy — on a building that stays occupied. A loft in SoHo wants a mirror that is also the light. We have done each of these, and the process for each is different.
Access is the other Manhattan variable: no driveway, alternate-side parking, a scaffold or a lift for anything above the second floor, freight elevator bookings in a doorman building. We plan for it; it is priced in, not discovered on the day.
Upper East Side, Lenox Hill, Yorkville, Carnegie Hill, Upper West Side, Morningside Heights, Harlem, Hamilton Heights, Washington Heights, Inwood, Midtown, Chelsea, Gramercy, Greenwich Village, SoHo, Tribeca, Lower East Side, Financial District, East Harlem, Hell’s Kitchen.
Manhattan has the densest concentration of landmarked buildings and historic districts in the city — the Upper East Side, Upper West Side, Greenwich Village, SoHo and Tribeca districts among them — and the Landmarks Preservation Commission reviews street-facing windows in all of them. Nearly every apartment building above a walk-up is a co-op or condo with an alteration agreement. Buildings over 25,000 square feet report under Local Law 97, and window performance goes into that file. We handle all three; see permit management and energy performance.
Yes. We prepare the alteration package the board requires, carry the insurance the building specifies, work within the building’s hours, and book the freight elevator. The Tower House on East 69th Street is a recent example.
Yes, on the Upper East Side, Upper West Side and in the Village. The street facade is matched to the original and submitted to Landmarks; the rear can be anything the owner wants.
Scaffold, lift, rope access or interior installation depending on the building; freight bookings and DOT permits arranged in advance. It is priced into the quote.
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About this page. Written by Alex GC Inc. d/b/a Alex Glass Construction and reviewed before publication by Aleksandr Chernovolenko, Managing Partner, with our design and estimating lead and a field foreman. Our foremen hold the NYC DOB Site Safety Training supervisor card and our crews the 40-hour worker card; we are certified to fabricate, install and service Alutech and Everest aluminum systems. Facts are drawn from our own projects, manufacturer test data and the applicable codes; where we are giving an opinion, we say so. Last reviewed September 2026. Credentials
Tell us the building and the opening. We survey, tell you what fits and what the approvals are, and quote from the measurements.
