20 Best Window Companies in Ontario, CA (2024 Reviews)

If you’re thinking about getting new windows, our guide to the best window installation companies can help.

We analyzed all the top-rated window companies in Ontario and selected the best 20 based on:

  • Customer reviews
  • Window installation expertise
  • Popularity with home-owners like you
EcoWatch Local Advisors

By EcoWatch Local Advisors

Updated May 20, 2024

Why you can trust EcoWatch

Our panel of energy experts work tirelessly to create unbiased reviews and informative content to help homeowners make educated decisions. No other windows site has covered energy efficiency and sustainability as long as EcoWatch, which means we're going to help you find windows replacements that will save on your energy bill and put more money back in your wallet.

The EcoWatch team is all about finding solutions for eco-conscious homeowners in Ontario. If your windows are made of traditional materials, or are outdated or damaged, you could be sending 25-30% of your house’s heat or cool air right out of them.

Replacement windows improve your home’s insulation, not only making you more comfortable during extreme temperatures, but also saving you some money and helping the environment.

We’ve compiled a list of the best installation companies to help you in your research, so you can not only take advantage of brand-new windows, but also save money on your energy bills.

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
Buy One Window, Get One 40% OFF
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

Best Window Installation & Replacement Companies in Ontario

The EcoWatch team researched dozens of providers that serve the Ontario area to find the top window installation companies by our standards. The providers mentioned in this article scored best in our review categories, which include energy-efficient offerings, local expertise, price, availability, customer service and more.

Window World logo
FAST QUOTE
as little as 30 seconds
Best Affordability

Window World

★★★★★
BBB Rating: A+
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Large serice area
  • Pros icon Low prices relative to competitors
  • Pros icon Great industry reputation
  • Pros icon Lifetime warranty
Cons:
  • Pros icon Quality of service will depend on your area

Window World has windows expertise in Ontario. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has been in the window installation industry for around 27 years.

If you’re looking for a company that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital, Window World may be the company for you.

Energy Efficiency of Window World Windows

Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.

How much does Window World cost in Ontario?

Window World does not list prices on its website, but it's known for offering some of the most affordable window installations around. You can ask for a free quote on its website for more information about pricing.

Milgard Windows & Doors logo
FAST QUOTE
as little as 30 seconds
Excellent Reputation

Milgard Windows & Doors

★★★★★
BBB Rating: A
Locations: West Coast
Founded: 1962
Pros:
  • Pros icon EnergyStar Partner
  • Pros icon Wide network of installers
  • Pros icon Lifetime warranty available
Cons:
  • Pros icon Entails hiring third-party contractors
  • Pros icon Limited additional services

Milgard Windows & Doors has the best local installation in Ontario. It's a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has been in the window installation industry for around 60 years.

If you’re looking for a company that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience, Milgard may be the company for you.

Energy Efficiency of Milgard Windows & Doors Windows

The company manufactures its own products, which gives it the freedom to make custom windows based on the climate. The company designs its own vinyl compounds and profiles to ensure a heat-stable product that performs as advertised. Not all of Milgard’s windows are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.

How much does Milgard Windows & Doors cost in Ontario?

Milgard does not list prices on its website, but it offers different kinds of windows at varying price points. You can ask for a free quote on its website for more information about pricing.

Renewal by Andersen logo
FAST QUOTE
as little as 30 seconds
Best Overall

Renewal by Andersen

★★★★★
BBB Rating: A
Locations: Nationwide
Founded: 1995
Pros:
  • Pros icon Great industry reputation
  • Pros icon Award-winning company
  • Pros icon Member of US Green Building Council
  • Pros icon Manufactures products in-house
Cons:
  • Pros icon No lifetime warranty
  • Pros icon More expensive than competition

Renewal by Andersen has the best availability in Ontario. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has been in the window installation industry for around 27 years.

If you’re looking for a company that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started, Andersen may be the company for you.

Energy Efficiency of Renewal by Andersen Windows

A handful of windows manufactured by the Andersen corporation were awarded Energy Star’s “Most Efficient” in 2021, and Andersen was named Energy Star’s Partner of the Year in 2019. Not all of Andersen’s windows are Energy Star certified, so be sure to mention that you want Energy Star windows when inquiring.

How much does Renewal by Andersen cost in Ontario?

Andersen does not list prices on its website, but based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. You can ask for a free quote on its website for more information about pricing.

We aim to be unbiased and transparent by including pros and cons for every provider. Additionally, any partnerships do not influence our reviews.

More Window Companies in Ontario

Renewal by Andersen of Los Angeles

Torrance, CA
4.6
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Glass Doors
  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Skylights

Website: https://www.renewalbyandersen.com/window-company/088-los-angeles-ca/about-us
Address: 18700 Crenshaw Blvd, Torrance, CA 90504
Phone: (310) 214-2222

United Builders Windows & Doors

Rancho Cucamonga, CA
5.0
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service

Services Offered

  • Service icon Bay Windows
  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options

Website: https://unitedbuilders.info/
Address: 13238 White Fir Ct, Rancho Cucamonga, CA 91739
Phone: (909) 969-8976

SoCal Window Pros

San Dimas, CA
5.0
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation

Website: https://socalwindowpros.com/
Address: 482 W Arrow Hwy Unit A, San Dimas, CA 91773
Phone: (909) 394-7777

Hometime Windows & Doors

Upland, CA
4.9
★★★★★
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: https://www.hometimewindows.com/
Address: 1081 W 9th St, Upland, CA 91786
Phone: (909) 288-4604

Molding's Plus Inc

Ontario, CA
4.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Glass Doors

Website: https://www.moldingsplus.com/
Address: 1856 S Grove Ave, Ontario, CA 91761
Phone: (909) 947-3310

La Verne Glass &Screen

La Verne, CA
4.7
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Mirrors
  • Service icon Custom Window Designs
  • Service icon Custom Glass
  • Service icon Glass Showers
  • Service icon Glass Doors
  • Service icon Window Replacement/Installation

Website: http://www.laverneglassandscreen.net/
Address: 1782 N White Ave, La Verne, CA 91750
Phone: (909) 593-8317

J. R. Door & Window Inc

Upland, CA
4.6
★★★★★
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: https://www.jrdoorandwindow.net/
Address: 615 N Benson Ave Unit I, Upland, CA 91786
Phone: (909) 949-9902

Madison Window Products

Rancho Cucamonga, CA
4.6
★★★★★
  • Pros icon Good Customer Service

Services Offered

  • Service icon Double-Hung
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames

Website: http://www.madisonwindowproducts.com/
Address: 8720 S Hellman Ave, Rancho Cucamonga, CA 91730
Phone: (909) 923-7091

Retro Windows and Patio Doors LLC

Fontana, CA
5.0
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Good Customer Service
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Energy-Efficient Options
  • Service icon Tempered Glass
  • Service icon Window Replacement/Installation

Website: http://www.retrowindowsanddoors.com/
Address: 9590 Catawba Ave, Fontana, CA 92335
Phone: (909) 500-4845

The Glass Company

Rancho Cucamonga, CA
4.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Showers
  • Service icon Glass Repair
  • Service icon Window Replacement/Installation

Website: http://theglasscompanyca.com/
Address: 9630 7th St Unit 115, Rancho Cucamonga, CA 91730
Phone: (909) 994-8744

Design Windows and Doors Inc.

Ontario, CA
4.3
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Bay Windows
  • Service icon Fiberglass Frames
  • Service icon Energy-Efficient Options
  • Service icon Window Replacement/Installation
  • Service icon Double-Hung
  • Service icon Glass Doors
  • Service icon Wood Frames
  • Service icon Vinyl Frames

Website: https://www.designwindowsinc.com/
Address: 504 S Mountain Ave, Ontario, CA 91762
Phone: (909) 365-2179

Mancino Door & Window, Inc.

Glendora, CA
4.9
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Window Replacement/Installation

Website: https://www.mdwdoors.com/
Address: 605 E Rte 66, Glendora, CA 91740
Phone: (626) 334-2525

Window World of Los Angeles

Covina, CA
4.5
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Price Transparency
  • Pros icon Educational Website
  • Pros icon Free assessment

Services Offered

  • Service icon Double-Hung
  • Service icon Bay Windows
  • Service icon Window Replacement/Installation
  • Service icon Glass Doors
  • Service icon Vinyl Frames

Website: https://www.windowworldla.com/
Address: 718 Arrow Grand Cir, Covina, CA 91722
Phone: (310) 564-7299

CDA Windows and Doors

Mira Loma, CA
3.2
★★★★★
  • Pros icon Educational Website
  • Pros icon Good Customer Service
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Glass Doors
  • Service icon Vinyl Frames
  • Service icon Window Replacement/Installation

Website: https://www.cdawindowsanddoors.com/
Address: 10247 Bellegrave Ave Suite 102, Mira Loma, CA 91752
Phone: (951) 530-8714

Andes windows & doors

Norco, CA
3.5
★★★★★
  • Pros icon Educational Website
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Double-Hung
  • Service icon Window Replacement/Installation
  • Service icon Vinyl Frames
  • Service icon Bay Windows
  • Service icon Glass Doors

Website: http://andeswindows.com/
Address: 1665 Third St C, Norco, CA 92860
Phone: (951) 268-6611

Window Professors

San Dimas, CA
3.0
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation

Website: https://windowprofessors.com/
Address: 482 W Arrow Hwy Unit A, San Dimas, CA 91773
Phone: (909) 394-7777

Energy Core Construction

Anaheim, CA
4.9
★★★★★
  • Pros icon Good Customer Service
  • Pros icon Educational Website
  • Pros icon Timely Service
  • Pros icon Free assessment
  • Pros icon Price Transparency

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options
  • Service icon Bay Windows
  • Service icon Glass Doors

Website: https://energycore.net/
Address: 1241 N Lakeview Ave suite h, Anaheim, CA 92807
Phone: (866) 933-2218

A Super Glass

Riverside, CA
2.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Good Customer Service

Services Offered

  • Service icon Glass Doors
  • Service icon Mirrors
  • Service icon Glass Showers
  • Service icon Window Replacement/Installation
  • Service icon Glass Repair
  • Service icon Window Repair

Website: https://www.asuperglassriverside.com/
Address: 4927 Newcastle St, Riverside, CA 92509
Phone: (951) 255-6621

WMB Windows

Ontario, CA
2.8
★★★★★
  • Pros icon Free assessment
  • Pros icon Price Transparency
  • Pros icon Good Customer Service
  • Pros icon Educational Website

Services Offered

  • Service icon Window Replacement/Installation
  • Service icon Energy-Efficient Options
  • Service icon Vinyl Frames

Website: http://www.wmbwindows.com/
Address: 491 Kettering Dr, Ontario, CA 91761
Phone: (909) 923-1689

Home Services at The Home Depot

Ontario, CA
2.8
★★★★★
  • Pros icon Price Transparency
  • Pros icon Free assessment
  • Pros icon Educational Website
  • Pros icon Good Customer Service

Services Offered

  • Service icon Energy-Efficient Options
  • Service icon Custom Window Designs
  • Service icon Window Replacement/Installation
  • Service icon Screen Repair
  • Service icon Glass Showers
  • Service icon Storm/Impact Windows
  • Service icon Vinyl Frames
  • Service icon Mirrors
  • Service icon Glass Doors

Website: https://www.homedepot.com/l/Ontario-CA/CA/Ontario/91762/6884/services
Address: 2980 S Euclid Ave, Ontario, CA 91762
Phone: (909) 332-5678
Ontario Window Cost Calculator

Calculate how much you can expect to pay for window installation and replacement in Ontario, CA using our customized window cost calculator.

Estimated Window Cost:
161 homeowners have requested a free estimate in the last 3 days.

Estimates will vary based on window dimensions and other unique factors to your home. Getting in touch with a local window installer is the best way to get an accurate cost estimate for your home.

How Installing Energy-Efficient Windows in Ontario Saves You Money

There are quite a few perks of switching to energy-efficient windows. A few reasons you may want to consider making the switch include the following:

  • Save money on electricity bills: Upgrading to energy-efficient windows lowers your energy bills by about 12% since you need less energy.
  • Protect your investment: When you have an older home, your windows could also be outdated or drafty. Upgrading your windows is an important part of maintaining your property and its value.
  • Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which filter out harmful UV rays, reducing fading of your furniture, carpet and other valuables.
  • Reduce your carbon footprint: Reducing how much energy you use also lowers your indirect greenhouse gas emissions. You could reduce it by 117 pounds per year on average.

Estimated Cost of Window Replacement in Ontario

Windows come in various shapes and sizes, so costs and services will vary remarkably. Here are the typical costs and services that you can find from window installation companies.

How Much Do New Windows Cost?

According to our research, the national average cost of installing a single window is around $600. However, window replacement costs can range from $200 to $1,200 for each window. How much it will cost varies based on several factors, such as size, number of windows, material, type, the location of your home and more.

Bear in mind that energy-efficient windows may cost more, but Energy Star estimates the upgrade will save you between $101 and $583 per year when installing single-pane windows and between $27 and $197 per year when you install double-pane, clear glass windows. These savings vary depending on your local climate, energy rates and individual home characteristics.

How much your window installation costs will also vary based on the type of material you choose for the frames. Wood windows are generally the most expensive, although it depends on whether they are solid wood or clad with aluminum or vinyl. Fiberglass windows also tend to be somewhat more expensive than vinyl, but they are shown to be more efficient.

What Services do Window Installers Offer?

When it comes to window replacements, in general there are two types that your provider will offer: full-frame and pocket installations.

Full-frame installations are usually recommended when you want to change the style of your windows or your window has significant rot or deterioration. With this service, your installers will replace the entire window, including the frame, trim and sill. Pocket installations (or retrofits) involve replacing a window within its existing frame, which makes pocket installations more simple and affordable. But, if the frame has any rot or deterioration, you should opt for a full-frame installation instead.

Your window replacement company will be able to help you choose what’s best for your needs. In Ontario, the decision will mostly be based on how old your home is and if there’s any damage. Wood can decay if not maintained properly over the years, so it’s a good idea to have a professional check your frames and window sills.

Best Availability

Renewal by Andersen

★★★★★
4.5
  • Great industry reputation
  • Member of US Green Building Council
  • Manufactures products in-house
Buy One Window, Get One 40% OFF
Get Estimate

Power Home

★★★★★
4.5
  • Uses eco-friendly materials
  • Well-trained, certified installers
  • Lifetime or lengthy warranty
Next-Day Appointments Available
Get Estimate

Best for Residential Windows

Window Nation

★★★★★
4.0
  • Custom Designs
  • Wide variety of products and services
  • Manufactures products in-house

How We Choose the Best Window Installers in Ontario

EcoWatch differs from other reviewers because we look at these companies through a sustainability lens. Along with energy efficiency, we evaluated window companies all across the state and assigned rankings based on the following methodology:

Service Area

Because this is a guide for Ontario, we paid more attention to companies that serve the city. There are certainly reputable providers that didn’t make our list because of the low odds that they would serve the average homeowner in Ontario.

Work Quality

We’re willing to bet that you’re looking for professionals who do a great job installing windows. We’ve vetted each installer on this list to ensure its technicians are well-qualified and that the company has gotten a lot of positive customer feedback to vouch for its service.

Customer Reviews

We analyzed patterns in recent online reviews to find the companies with the most customer satisfaction, weighted by sample size. Customer satisfaction may be the factor we place the most value on, as it reflects the quality of services across most other categories, including cost, quality of parts, quality of installation, professionalism, warranty and more.

Cost

This one is a give-and-take: as with other services, cheap window installers won’t always provide the most quality service. On the other hand, we want to make sure we’re highlighting companies that offer a wide range of price and financing options so they’re accessible to most homeowners.

Warranty

Protecting your investment in new windows is important. For that reason, window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.

Years of Experience

Due to Ontario’s climate, homeowners will want to mitigate rot, low efficiency and water damage. We factored in local experience to reflect the ability of Ontario window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.

Ontario, CA Window Replacement FAQs

What is the average cost to install new windows in a home?

The national average cost of replacing a window is about $600 but can range from $200 to $1,200, depending on several factors. The price is typically dependent on the size of the window, the type and material of the window and the location of your property. Also, remember that energy-efficient windows may cost more upfront but can save you hundreds of dollars a year in energy bills.

What are the most common types of replacement windows?

There are various types of windows you can get for your home, including transom windows, picture windows, slider windows, awning windows, double-hung and single-hung windows, casement windows and bay windows.

When do I have to use a window installation company?

Unless you’re handy and have all the tools you need to replace your own windows, we recommend hiring the pros. The process of installing windows is quite involved and can take anywhere from four to six hours for one window. Although it’s tempting to try to save some money by doing it yourself, hiring a professional is a faster, more efficient and much safer alternative.

How often do you need to replace your windows?

Windows have an average lifespan of about 20 to 30 years. If your windows are older than that, they should probably be replaced. Apart from that, if your windows have any damage on them, or they have become difficult to open or close, they may be in need of replacement.