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Best Window Replacement Companies in Islip, NY

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Written By Max Peterson|Last Updated: April 18, 2024

You might be installing new windows to improve your home's appearance, lower your energy usage, or protect your home from inclement weather. Local contractors recognize that homeowners would rather not pay a fortune for window replacement in Islip. They work with innovative materials that don't sacrifice durability.

Top Pick
4.7
  • Full-service installation
  • Large window selection
  • Nearly 30 years of experience
Best Financing
4.4
  • Full-service installation
  • In-house, U.S.-made products
  • More than 70 years of experience
Most Customizable
4.3
  • Full-service remodeling
  • 96% satisfaction rate
  • More than 30 years of experience

Top 10 Islip Window Installation Companies

We recommend these local window installers for your window replacement project in Islip.

Islip residents can trust the This Old House Reviews Team to provide authoritative, up-to-date window replacement company recommendations. To find out the best installers, we concentrate on these five traits:

  • Product quality
  • Customer reviews and recommendations
  • Professional experience and licensure
  • Energy-efficiency guarantees
  • Services and warranties
Window World of Long Island Logo

Window World of Long Island

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5/5
Based on 424 customer reviews.

Services Offered

Glass DoorsCustom Window DesignsEnergy-Efficient OptionsWindow Replacement/installationBay WindowsDouble-Hung

Highlights

  • Good customer service
  • Free assessment
  • Price transparency
33 Hempstead Tpke, Farmingdale, NY 516-377-3500 windowworldlongisland.com
Flawless Glass & Mirror LLC Logo

Flawless Glass & Mirror

4.7/5
Based on 27 customer reviews.

Services Offered

Window Replacement/installationMirrorsGlass Showers

Highlights

  • Good customer service
  • Price transparency
  • Educational website
1350 Lincoln Ave # 10, Holbrook, NY 631-275-0485 flawlessglassandmirror.com
Smithtown Window Replacement and Doors Logo

Smithtown Window Replacement and Doors

4.6/5
Based on 16 customer reviews.

Services Offered

Double-HungGlass DoorsFiberglass FramesGlass ShowersVinyl FramesCustom Window DesignsTriple Pane GlassMetal FramesWindow Replacement/installationTempered GlassEnergy-Efficient OptionsBay WindowsStorm/impact WindowsWood FramesWindow Repair

Highlights

  • Good customer service
  • Free assessment
  • Price transparency
43 Landing Ave, Smithtown, NY 631-646-2386 smithtownwindowsdoors.com
Good Guys Contracting Logo

Good Guys Contracting

4.5/5
Based on 59 customer reviews.

Services Offered

Bay WindowsEnergy-Efficient OptionsWindow Replacement/installationMetal Frames

Highlights

  • Good customer service
  • Price transparency
  • Free assessment
441 Broadway, West Babylon, NY 631-559-6420 goodguyscontracting.com
Pro Quality Home Improvements Inc. Logo

Pro Quality Home Improvements

4.5/5
Based on 36 customer reviews.

Services Offered

Energy-Efficient OptionsBay WindowsWindow Replacement/installationGlass DoorsWindow RepairSkylights

Highlights

  • Price transparency
  • Good customer service
  • Timely service
1120 Little East Neck Road, West Babylon, NY 631-393-6812 proqualityhomeimprovements.com
EcoView Windows of Long Island Logo

EcoView Windows of Long Island

4.5/5
Based on 42 customer reviews.

Services Offered

Window Replacement/installationDouble-HungEnergy-Efficient OptionsBay WindowsGlass Doors

Highlights

  • Free assessment
  • Good customer service
  • Educational website
54 Enter Ln, Islandia, NY 631-538-4731 ecoviewwindowsli.com
Tri State Window Factory Logo

Tri State Window Factory

4.4/5
Based on 129 customer reviews.

Services Offered

Vinyl FramesGlass DoorsWindow Replacement/installation

Highlights

  • Good customer service
  • Price transparency
  • Timely service
360 Marcus Blvd, Deer Park, NY 631-667-8600 tristatewindowfactory.com
Four Seasons Sunrooms Logo

Four Seasons Sunrooms

4.4/5
Based on 299 customer reviews.

Services Offered

Window Replacement/installationEnergy-Efficient Options

Highlights

  • Free assessment
  • Educational website
  • Price transparency
5005 Veterans Memorial Hwy, Holbrook, NY 631-443-4238 fourseasonssunroomsoflongisland.com
Glass Doctor Logo

Glass Doctor

4.3/5
Based on 29 customer reviews.

Services Offered

Window RepairEnergy-Efficient OptionsGlass DoorsWindow Replacement/installationGlass ShowersCustom GlassGlass RepairMirrors

Highlights

  • Price transparency
  • Educational website
  • Good customer service
354 Smithtown Blvd, Ronkonkoma, NY 631-619-6711 glassdoctor.com

More Local Window Companies

Renovate Right, Inc.

User Reviews: 4.6/5 

455 East Dr
Copiague, NY 11726

Coram Glass & Mirror Inc

User Reviews: 4.2/5 

88-D Johnson Ave
Ronkonkoma, NY 11779

Sayville Custom Mirrors Inc

User Reviews: 4.1/5 

251 W Main St
Sayville, NY 11782

Morningstar Doors and Windows, Inc.

User Reviews: 4.6/5 

215 Adams Blvd
Farmingdale, NY 11735

Unified Home Remodeling

User Reviews: 4.2/5 

298 Medford Ave
Patchogue, NY 11772

Home Services at The Home Depot

User Reviews: 4.4/5 

1101 Sunrise Hwy
Copiague, NY 11726

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

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Facts about Islip
Annual Energy Efficient Windows Savings:$215
Average Max Temp:55°F
Average Min Temp:49°F
Average Daily Sunlight:58%
Average Annual Snowfall:25.4"
Average Monthly Precipitation:3.90"

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

How To Choose a Window Company in Islip

With Islip's sheer size, you're sure to find a trustworthy window replacement company in line with your values and preferences. As you make calls, keep the following factors in mind:

Window Cost by Type

When it comes to replacing your windows, cost-effectiveness is key. Each window you purchase should deliver top-notch durability at a fair price point. Although high-quality windows may cost more upfront, they often provide better long-term value due to their extended lifespan. The total cost of your replacement windows will depend on the specific sizes, materials, and styles you need. Transom windows are inexpensive with their simple size and straightforward form factor, while new skylights cost more to prepare for and install. It's recommended to consult a reliable window installer to decide on your most suitable options.

In this table, you can find cost data for the most common residential window types to determine how much you might pay.

Window TypesAverage Cost
Arched$248-$1525
Awning$359-$1001
Bay$828-$6147
Custom$368-$1024
Casement$286-$1661
Double-hung$133-$865
Egress$245-$613
Glass Block$49-$621
Picture$215-$1593
Single-hung$97-$1639
Skylight$122-$1479
Sliding$282-$1434
Storm$58-$405
Transom$300-$628

Window Material Cost

Materials also help determine a window's cost. You might choose a material based on your energy efficiency goals, the local climate, and your desired look. For example, wood windows can give your home an organic design without breaking the bank, but you'll have to invest more toward maintenance. Aluminum and composite windows cost more up-front, but they're incredibly durable against the elements, so you'll spend far less on maintenance.

Window TypesAverage Cost
Aluminum$58-$1639
Composite$591-$1329
Fiberglass$97-$828
Vinyl$199-$1844
Wood$295-$1661

Other Window Replacement Costs

Ask each company you're considering about labor costs, warranty fees, and permit fees. This will help you understand the total costs involved in the project.

Experience and Training

Choose a business that focuses on window replacement and installation, and look for this information on its website:

  • How long it's been serving the Islip area
  • Photo galleries of projects its crews completed
  • Official non-government accreditations attesting to its workmanship
The more experience a company has, the better its service and workmanship.

Licensing and Credentials

New York's state government doesn't issue contracting licenses for window installers, but this doesn't stop local governments from stepping in and establishing their own licenses. For example, to install windows in New York City, a company must obtain a Home Improvement Contractor License by passing exams and sustainability audits.

Types of Windows Offered

The style of window you desire should play a role in your company choice. Not every contractor will necessarily be familiar with the window brand you want. A company website will tell more about the window types it deals with, such as:

Finally, pay close attention to the materials that a provider uses. Each window frame material has a different life span, price point and energy efficiency level. A company will usually specify whether the windows they place use composite, vinyl, metal, fiberglass, or wood.

Customer Feedback

Reading other customers' stories is one of the best ways to screen different window companies. Read customer reviews on sites such as Trustpilot, Google, and Yelp. You can also view customer reviews and company ratings on the Better Business Bureau (BBB) website. Referrals can also help you in your company search. Ask each company you're interested in for a list of references, and talk to family and friends about who they use for window installations.


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Frequently Asked Questions About Window Replacement in Islip

How could new windows help my energy efficiency?

In Islip specifically, most homeowners using efficient windows reduce their carbon emissions by 310 pounds annually. This means they save $220 on their annual electricity costs.

The U.S. Department of Energy states that 25%–30% of a home's heating and cooling capacity is used to compensate for heat gain and heat loss through windows. By investing in new, more efficient windows, you can boost your home's energy efficiency and lower your electricity bills.

I've heard there are tax credits for energy-efficient windows. How much could I save?

Yes. No matter where you're located, you can claim a federal tax credit of up to $3,200 per year on up to 30% of your window replacement's cost. Additionally, most state and some local jurisdictions offer tax credits of their own. We recommend consulting your local energy department for specific information about tax incentives available in your area.

How important are guarantees and extended support packages?

Window companies often offer warranties for their services. Each typically addresses defects with materials and workmanship for a specified period of time. It's essential to verify the details of the guarantee with a window company before signing a contract.

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

More Window Resources

National Windows Company Ranking Methodology

Sources

Energy Star