Replacement windows in Manhattan in thermally broken aluminum, uPVC, Pella, Andersen and Marvin clad-wood and steel: measured by us, ordered to our survey, installed by our own crews one opening at a time, with the co-op, DOB or Landmarks approvals prepared.
In short: Alex Glass Construction replaces windows in Manhattan: full-frame or insert replacement in thermally broken aluminum, uPVC, Pella, Andersen and Marvin clad-wood, or steel, with Low-E argon glass, laminated or acoustic glass where the street demands it. We measure every opening, order to our own survey, prepare the co-op, DOB or Landmarks package, and install one opening at a time with the room weather-tight by the end of the day. Survey and quote are free. Call 929-235-1233 or request a free quote.
Manhattan window replacement is three jobs. The landmarked townhouse, where the Landmarks Preservation Commission reviews the street-facing windows and we replace in Marvin, Pella, Andersen or steel to match the original: the Upper West Side landmark replacement in Pella Reserve, Marvin Ultimate on East 71st Street, the Cortizo package at 165 East 64th Street. The pre-war co-op, to the building standard, one apartment at a time. And the commercial or institutional replacement: the double-hung replacement at the post office near Webster Hall, Everest divided-lite windows at 99 Claremont Avenue, Crystal windows at 1763 Amsterdam Avenue.
Noise is the other Manhattan question: a double window or laminated acoustic glass on an avenue or above a subway grate; see soundproof windows NYC. The borough overview is Manhattan windows, doors and glass; the Upper East Side has its own page.
Uptown: Upper East Side, Upper West Side, Harlem, Hamilton Heights, Morningside Heights.
Midtown and downtown: Midtown, Chelsea, Gramercy, Greenwich Village, West Village, East Village, SoHo, Tribeca, Hudson Square, Financial District, Battery Park City, Lower East Side, Washington Heights.
A street-facing window on a landmarked building is a Landmarks Preservation Commission permit; a rear window usually is not; a change to an opening files through the DOB with the architect. Co-ops and condos add the board package. A townhouse front usually needs a sidewalk shed or a pipe scaffold, which we arrange with the DOT permit. Local Law 97 sets the U-factor on larger buildings. Installation is one to a few openings per crew per day, with every opening closed and sealed the same day; occupied apartments are done in a day each.
Full-frame against insert replacement, and the four sizes of an opening, are explained on window replacement and masonry opening, rough opening, unit size; how we measure is on how we measure a window opening.
More projects are added to the portfolio as they finish.
Alex Glass Construction measures, supplies and installs replacement windows in Manhattan in aluminum, uPVC, clad-wood and steel, with the approvals prepared. Call 929-235-1233 or send photos of the windows.
It depends on the number and size of openings, the material and line, the glass, and the installation conditions (scaffold, landmark filing, co-op package). We quote per opening with everything named, and the survey and quote are free.
Full-frame removes the old frame and replaces the flashing; insert leaves it in place and fits a smaller unit inside it. Full-frame is right when the old frame leaks or rots; insert when it is sound and the budget or the building rules point that way.
Three to twelve weeks from the approved order by line, longer for imported systems; installation runs one to a few openings per crew per day, with each opening closed and sealed the same day.
Yes, to the building window standard and alteration agreement, with the insurance and drawings the board asks for.
Usually, when the replacement matches the original in profile, divided-lite pattern, color and material; Marvin Signature Ultimate, Pella Reserve, Andersen E-Series and steel are approved regularly, and we prepare the filing with elevations and sections.
Yes, to the building standard and alteration agreement, with the insurance and drawings the board requires, scheduled to the building hours and done one apartment at a time.
Window Replacement Manhattan Upper East Side Townhouses Marvin in Manhattan Soundproof Windows NYC Window Replacement in Queens
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
Send photos of the windows inside and out and the address. We will survey, quote per opening and tell you what approvals apply.
