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Window Replacement

Full window replacement for residential and commercial properties

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Why Choose Allstate?

NYC DOB Licensed & Insured

Free Written Estimates

5-Year Workmanship Warranty

Local Law 11 Expertise

Clean Jobsite Guaranteed

About This Service

Professional Window Replacement in NYC

Old, drafty, or failing windows cost you money every month in energy bills and reduce comfort and security. Allstate Construction installs replacement windows across all residential and commercial property types in NYC. We handle everything from single window replacements to full building window programs, including NYC DOB permits and HPD compliance for rentals.

The Allstate Difference

NYC DOB filing included in every permitted project. We are HPD registered for window guard installations. Our crews are trained in proper flashing and air sealing — the most critical and most skipped steps in window replacement.

What's Included

Our Window Replacement Services

Double and triple-pane insulated window installation
Vinyl, fiberglass and aluminum window replacement
Casement, double-hung, awning and picture window types
Commercial storefront window systems
Full frame and insert (pocket) replacement
Historic window restoration and re-glazing
NYC HPD window guard installation
NYC DOB permit filing
Proper flashing and air sealing at openings
Stucco, brick or siding repair around new windows

Our Process

How We Handle Your Window Replacement Project

Step by step — from first contact to finished job

Measurement

Precise rough opening measured. Window type, operation and glazing specified.

Window Removal

Old window removed carefully. Opening inspected for rot, damage and proper flashing.

Installation

New window shimmed, leveled and fastened. Flashing tape and sill pan installed for watertight seal.

Sealing & Finish

Interior and exterior gaps filled with low-expansion foam. Trim reinstalled and caulked. Area cleaned.

FAQs

Common Questions About Window Replacement

For like-for-like replacement in the same opening, a permit is typically not required. Changes to opening size or window type require NYC DOB filing. We handle this.

Replacing single-pane windows with double-pane low-E glass can reduce heating and cooling costs by 15–25% annually.

NYC requires window guards in apartments where children 10 and under live. Landlords are required to provide them. We install HPD-compliant window guards.