7 Best Window Installation Companies

Upgrading your home’s windows improves your curb appeal and makes your home more energy-efficient. You can replace windows yourself, but working with a professional installer reduces your chances of costly mistakes and damage. The right window installer will also minimize your window replacement costs without sacrificing your aesthetic goals.

We at the This Old House Reviews Team have researched the best window brands that offer installation and compiled our top recommendations.

Here are our picks for the top window installation companies based on 400+ hours of research and interaction with window companies:

• Renewal by Andersen: Most Hands-Free Install
• Champion Windows: Best Financing and Discounts
• Power Home: Most Customizable
• Castle Windows: Best Warranty
• Milgard Windows: Best Fiberglass Windows
• Marvin Windows: Most Innovative Windows
• Harvey Windows and Doors: Best Custom Hardware

Get an idea of what each window installer offers with our tool below.

Here are the key factors to consider when searching for a windows installation company.

• Certifications and insurance: All window installation companies should have proper certifications, licenses, and insurance for your state. Don’t work with an installer that doesn’t have the proper documentation. Working with an unlicensed installer could result in improper installations and legal issues. If you work with an independent window installer, check that the company is certified to install your selected window brands. Many window manufacturers maintain a network of certified installers to install their products. This ensures the windows are installed to the company’s specifications and instructions.
• Reviews: Read online reviews from the Better Business Bureau, Google Reviews, Best Company, and other reliable customer review sites. Look for reviews that comment on the product quality, sales team, installation process, and customer service experience. Check for customer satisfaction complaints regarding warranty claims and repair services. We also recommend speaking to neighbors, friends, and family who have completed window projects to get a feel for their experiences with their selected installer.
• Warranties: Window warranties provide additional peace of mind as they cover the glass, window frame, and other components if something goes wrong. You may receive a separate manufacturer’s and labor warranty if your window manufacturer and installation company differ. Review each warranty in detail and ask questions. Get clarification about your warranty length, transferability, and specific coverage for the window frames, glass, hardware, and labor. 
• Windows selection: Your windows may be manufactured in-house or by a third party, depending on your selected installer. If the products are manufactured in-house, check the company’s catalog to ensure it carries the styles and products needed for your window project. You’ll also have more freedom to customize components, though you’ll be limited to that company’s products only. Some companies may work exclusively with a brand, while others stock various options. Some companies also offer discounts or specials if you’re upgrading many windows. However, you’ll be limited to the in-stock options and be unable to customize. Check the windows’ functionality, appearance, and feel to help you select the right ones for your home.

Below are the types of windows professional window installation companies offer and their average installation costs.*

• Awning windows ($420–$760): These windows use hinges at the frame’s top and swing outward from the bottom. They often employ a crank or a type of glide hardware.
• Basement hoppers ($150–$650): These are small windows that run across the top of basements and increase natural light and airflow. They’re often hinged at the bottom to open at the top.
• Bay ($500–$2,500) and bow windows ($700–$1,500): These windows curve outward from your home. Adding a box seat or ledge underneath them can transform the area into a bookshelf or additional seating. Bay windows are angular, and bow windows are more curved.
• Casement windows ($150–$1,000): This window uses a side hinge and swings open to the left or right via a crank. You usually use casement windows in hard-to-reach areas, such as over a kitchen sink or in a bathroom.
• Double-hung windows ($150–$650): Double-hung windows are one of the most common window styles. These windows use two locks and open at the top and bottom.
• Garden windows ($1,200–$2,000): Garden windows protrude from your home to create a space to grow plants and herbs. We recommend them as kitchen windows.
• Glass block windows ($400–$1,100): These privacy windows are translucent yet thick blocks of glass. They allow light into the room but obscure the view, which makes them popular for bathrooms and basements.
• Picture windows ($80–$800): These windows act as floor-to-ceiling accents. They provide lots of natural light but you can’t open them.
• Shaped windows ($300–$2,000): Sometimes called geometric windows, shaped windows act as an accent that lets light in where standard windows might not work. Popular shapes include half-round, round, eclipse, triangles, and trapezoids.
• Single-hung windows ($100–$400): These popular windows function similarly to double-hung windows but have one center lock. They also tend to be smaller than double-hung windows.

*All cost information was calculated using RSMeans data from Gordian™. RSMeans is a construction cost database used by thousands of contractors to generate their project pricing.

Most of the companies in our review are national window brands that provide installation services. They either have an in-house team of installers or a network of contractors trained to install their products. Many of the brands have varied availability in different regions, so it’s crucial to find the right local window installer in your area. Use the tool below to find installers that serve your ZIP code.

The right installation company will make your windows replacement project seamless. National window brands with installation services offer a one-stop-shop approach, providing a network of installers trained to install their products. Independent windows installers can offer a more extensive catalog of brands, giving you more customization options. Look for special promotions and discounts that can make your window replacement affordable. 

We recommend getting quotes from at least three window installers to find the best catalog and pricing. Compare the available window styles, materials, energy efficiency offerings, and warranty details.

The This Old House Reviews Team backs up our window ratings and recommendations with a detailed rating methodology to objectively score each provider. We conduct research by speaking with company representatives, browsing product selections, analyzing window line specifications, and conducting focus groups and consumer surveys. We then score each provider against our review standards for window variety, value, trustworthiness and transparency, window features, and customer service to arrive at a final score on a 5-point rating scale.

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