Home
Pricing
About
Contact
Call (631) 565-8126

Mon–Sat, 7 am – 6 pm

Lic# H2203150000

Window Replacement

Window Installation Long Island — Nassau & Suffolk County Contractor

Professional window installation on Long Island for Nassau and Suffolk County homeowners. With 850+ windows installed across Long Island by our licensed, ENERGY STAR certified crews, we handle every window type — double-hung, casement, bay, bow, sliding, and egress — with permits, flashing, and inspections managed from start to finish. Whether you're replacing aging aluminum sliders on a 1963 split-level in Wantagh, upgrading to bay windows in a Garden City colonial, or installing energy-efficient casements in a Smithtown center-hall, our Nassau and Suffolk County window installation team delivers on time, on budget, and fully permitted. Most Long Island homeowners pay $400–$1,200 per window installed. A full-house project of 15 windows runs $6,000–$18,000 depending on window type and frame material.

Get Free Estimate
Starting at $400 – $1,200 per window installed
Window Installation Long Island — Nassau & Suffolk County Contractor

Window Installation Long Island — Nassau & Suffolk County

Window installation on Long Island covers a wide range of styles suited to the region's diverse housing stock. Double-hung windows remain the top choice for Levittown ranches and Smithtown colonials — both sashes tilt in for easy cleaning and multi-chamber vinyl frames cut air infiltration by up to 50%. Casement windows, hinged on the side and crank-open outward, deliver the tightest seal of any operable style, making them ideal for kitchen and bathroom openings throughout Nassau and Suffolk. Bay and bow windows project outward to add interior space and panoramic light — a popular upgrade for Long Island dining rooms and living rooms. Sliding windows work well on contemporary homes and coastal properties where outward-opening sashes would interfere with walkways.

We install all four major brands trusted by Long Island homeowners: Andersen (100, 200, 400, E-Series), Pella (250, Lifestyle, Architect), Marvin (Elevate, Signature, Essential), and Simonton — covering every budget from entry-level vinyl to premium wood-clad. Every installation meets ENERGY STAR requirements for climate zone 5, keeping heating costs down through Long Island winters. We are licensed and insured in both Nassau County and Suffolk County, handle all permit filings, and offer free in-home estimates. A typical project of 10 windows is completed in 1–2 days.

Key Benefits

Why Choose Window Installation on Long Island?

Every Window Type Installed

Double-hung, casement, awning, bay, bow, picture, sliding, hopper, and custom specialty shapes. We install vinyl, wood-clad (Andersen, Pella, Marvin), fiberglass, and aluminum-clad windows across all of Nassau and Suffolk County.

Energy Star & NYSERDA Rebates

All windows we install meet or exceed Energy Star requirements for the Northern climate zone. The federal energy tax credit for windows ended after 2025. NYSERDA EmPower New York rebates are available for income-qualifying Long Island homeowners.

Long Island Salt Air Rated

Coastal Long Island homes — South Shore from Valley Stream to Montauk, North Shore from Great Neck to Port Jefferson — face constant salt air exposure that destroys aluminum frames and corrodes hardware. We install vinyl and fiberglass windows with marine-grade hardware rated for coastal environments.

Nassau & Suffolk Permits Handled

Most Long Island municipalities require permits for window replacement when the opening is modified or a new window type is installed. Nassau County towns (Town of Hempstead, Town of Oyster Bay) and Suffolk County towns (Town of Islip, Town of Smithtown, Town of Huntington, Town of Babylon) all have specific requirements. We pull every permit and coordinate inspections.

Transparent Pricing

Most Long Island homeowners pay $400–$1,200 per window installed for standard vinyl double-hung replacements. Premium wood-clad bay windows run $1,800–$3,800. A full-house project of 15 windows typically costs $6,000–$18,000. We provide free, itemized written estimates — no hidden fees, no bait-and-switch.

Same-Opening Replacements

The majority of Long Island window replacements are insert installations into existing frames — no siding or interior trim disturbance. We keep existing rough openings intact and install precision-measured new window units that fit perfectly, with foam insulation and flashing tape around every opening.

Our Process

How Your Installation Works

1

Free In-Home Estimate

We measure every window opening, assess the frame and sill condition, check for rot or structural issues in the rough opening, and discuss window style, glass package, and material options. You receive a written itemized estimate before we leave.

2

Window Selection & Order

We order your custom-measured windows from the manufacturer. Standard vinyl double-hung windows typically arrive in 2–3 weeks. Wood-clad and specialty units take 4–6 weeks. We confirm your installation date once the windows arrive at our warehouse.

3

Installation Day

Our crew protects your floors and furniture, removes the old windows, installs new units with foam insulation and flashing tape at every opening, installs interior and exterior trim, and hauls away all old window material. Most full-house projects finish in 1–2 days.

4

Inspection & Warranty

Where permits are required, we coordinate the final inspection with your local building department. You receive the manufacturer warranty registration, our 5-year workmanship warranty, and a signed permit close-out for your records.

Window Installation on Long Island installation in progress on Long Island

Professional Installation

2,840+ windows installed across Long Island since 2011

Transparent Pricing

Window Installation on Long Island Cost on Long Island

Per Window Installed

$400 – $1,200

Whole-House (16 Windows)

$6,000 – $18,000

Window installation on Long Island typically runs $400–$1,200 per window for standard vinyl double-hung replacements in existing openings. Casement windows run $500–$1,400. Bay windows (3-panel) run $1,800–$3,800 installed. Bow windows (5-panel) run $2,500–$5,500. A full-house replacement of 15 standard windows typically costs $6,000–$18,000 depending on window type, frame material, and glass package (dual-pane vs triple-pane, standard vs low-E vs argon). All pricing includes removal and disposal of old windows, precision installation with foam insulation and flashing tape, interior and exterior trim, and our 5-year workmanship warranty.

Exact pricing depends on window size, glass options, and installation complexity. Get a precise quote for your home.

Get Your Free Quote

Frequently Asked Questions

Window Installation on Long Island FAQs

Most Long Island homeowners pay $400–$1,200 per window installed for standard vinyl double-hung replacements. A full-house project of 15 windows typically runs $6,000–$18,000. Factors that affect price: window type (double-hung vs casement vs bay), frame material (vinyl vs wood-clad), glass package (standard vs low-E vs triple-pane), and whether the rough opening needs modification. We provide free, itemized written estimates for every project.
It depends on the scope. Like-for-like replacements in the same opening generally don't require permits in most Long Island towns. If you're changing the opening size, switching window types (e.g., adding a bay window where a flat window was), or the municipality specifically requires permits for all window replacements, a permit is needed. We review the scope at the estimate visit and pull any required permits as part of the job.
For most Long Island homes, vinyl double-hung windows with low-E glass and argon gas fill are the best combination of performance and value. They resist salt air, never need painting, and cut energy costs by 15–30%. Coastal homes within a mile of the water benefit from windows with marine-grade hardware and higher wind-load ratings. For premium homes and historic districts (Garden City, Roslyn), wood-clad windows from Andersen or Marvin maintain character while delivering modern performance.
Yes. NYSERDA's EmPower New York program offers rebates for income-qualifying Long Island homeowners. PSEG Long Island also periodically offers rebates for Energy Star qualified replacements. The federal energy tax credit for windows ended after 2025. We identify all applicable rebates during the estimate process.
Most full-house window replacement projects (10–20 windows) are completed in 1–2 days. Larger projects or homes with specialty windows (bay, bow, custom shapes) may take 2–3 days. Custom-ordered windows typically arrive 2–4 weeks after your signed contract. We confirm a firm installation date once your windows arrive at our warehouse.
Yes. We serve all of Nassau County — including all towns and villages from Valley Stream to Oyster Bay — and all of western and central Suffolk County through Smithtown and Commack. We're familiar with permit requirements in every major Long Island municipality and have installed windows in thousands of homes across both counties.
Yes. Window installation is our core service. We install every window type — double-hung, casement, bay, bow, sliding, picture, and specialty shapes — across all of Nassau County and Suffolk County. Our crews are fully licensed and insured in both counties, and we handle all permit filings at no extra charge. Free in-home estimates are available within 48 hours across most of Long Island.
In Nassau County we install Andersen (100, 200, 400, and E-Series), Pella (250 Series, Lifestyle, and Architect), Marvin (Elevate, Signature, and Essential), and Simonton — covering every price point from entry-level vinyl to premium wood-clad. We are a certified installer for both Andersen and Pella, meaning our crews are factory-trained and your manufacturer warranty is fully backed. We'll recommend the right brand for your home's style, budget, and energy goals.
Most Long Island homeowners pay $400–$1,200 per window for standard vinyl double-hung installations. Casement windows run $500–$1,400 each. Bay windows (3-panel) range from $1,800–$3,800 installed. A full-house project of 10 windows typically costs $4,000–$12,000. Nassau County permit fees run $150 filing plus $75 per window for projects of four or more; Suffolk towns vary but are typically $150–$250 flat. We provide free, itemized written estimates — no hidden fees, no pressure.
Yes. We install windows throughout Suffolk County, including Huntington, Smithtown, Babylon, Bay Shore, Commack, Lindenhurst, Patchogue, and surrounding towns. We know the permit requirements for every major Suffolk municipality and coordinate all filings and inspections as part of the job. Most projects are completed in 1–2 days. Free in-home estimates are available Monday through Saturday.
A single window swap takes 1–2 hours. A full-house project of 10 windows is typically completed in 1–2 days. Larger homes with 20 or more windows usually take 2–3 days. Bay and bow windows may add a day if structural work is needed. Custom-ordered windows arrive 2–4 weeks after signing, and we confirm a firm install date once your windows land at our warehouse. We always finish the day weather-tight.

Customer Reviews

What Long Island Homeowners Say

They replaced all 16 windows in our 1957 ranch in one day. The team was professional, the new windows look incredible, and our heating bills dropped noticeably the first winter. Would absolutely use them again.

Patricia A.

Levittown, NY

We added a bay window to our living room and replaced 12 double-hungs throughout. The bay window installation was done perfectly — it sits flush with the siding and the interior trim looks custom. Very happy.

David R.

Smithtown, NY

Living near the bay means salt air destroys everything. The new vinyl windows they installed are rated for coastal environments and the hardware is much sturdier than what came out. No more corrosion issues.

Sandra K.

Merrick, NY

Free Estimate

Get a Free Window Installation on Long Island Quote

Tell us about your window project and we'll provide a detailed estimate within 24 hours.

Call (631) 565-8126
0+

Homes Completed

0.0

Google Rating

0+

Years Experience

Get Your Free Quote

Answer 3 quick questions and we'll call you with pricing.

Step 1 of 4 · Takes 30 seconds

What type of home?