20 Best Window Companies in Windsor, CA (2025 Reviews)
Looking to improve your property’s insulation? The best window replacement companies can help.
We analyzed all the top-rated window companies in Windsor and selected the best 20 based on:
Customer reviews
Window installation expertise
Popularity with home-owners like you
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Why you can trust EcoWatch
Whether you're updating for aesthetics or have old windows, windows play a vital role in conserving your home's energy. Poor windows can cut your home’s energy efficiency by up to 30%, according to the Department of Energy. In Windsor, that’s around $418 a year that you could save on your power bills after making the switch.
Thankfully, saving you money with efficient windows also helps our goals of reducing energy usage for the environment.
Unlike other sites, EcoWatch ranks window companies based on energy efficiency while also balancing cost, customer satisfaction and service area.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
Best Window Installation & Replacement Companies in Windsor
The EcoWatch team researched dozens of installers across the country to find the top window installation companies for our readers. The providers mentioned in this article scored best in our categories: energy-efficient offerings, price, customer service, availability and more.

Window World
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
Quality of service will depend on your area
Window World provides windows expertise in Windsor. 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.
Window World may be the company for you if you want one that is certified by the Environmental Protection Agency (EPA) and Energy Star and supports charities like St. Jude Children’s Research Hospital.
Energy Efficiency of Window World WindowsWindow World caters to eco-conscious consumers by providing energy-efficient window offerings. Its high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home.
How much does Window World cost in Windsor?Window World doesn’t have any prices displayed on its website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate information, you can receive a quote on the company’s website.

Milgard Windows & Doors
EnergyStar Partner
Wide network of installers
Lifetime warranty available
Entails hiring third-party contractors
Limited additional services
Milgard Windows & Doors provides the best local installation in Windsor. 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.
Milgard may be the company for you if you want one that offers competitive pricing, a comprehensive warranty and installers that all have a minimum of 15 years of window installation experience.
Energy Efficiency of Milgard Windows & Doors WindowsMilgard Windows & Doors caters to eco-conscious consumers by providing energy-efficient window offerings. 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.
How much does Milgard Windows & Doors cost in Windsor?Milgard doesn’t have any prices displayed on its website, but it offers different kinds of windows at varying price points. If you’d like more accurate information, you can receive a quote on the company’s website.

Renewal by Andersen
Great industry reputation
Award-winning company
Member of US Green Building Council
Manufactures products in-house
No lifetime warranty
More expensive than competition
Renewal by Andersen provides the best availability in Windsor. 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.
Andersen may be the company for you if you want one that uses in-home estimates and advanced digital tools to help you plan and visualize your project before getting started.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen caters to eco-conscious consumers by providing energy-efficient window offerings. 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.
How much does Renewal by Andersen cost in Windsor?Andersen doesn’t have any prices displayed 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. If you’d like more accurate information, you can receive a quote on the company’s website.
One thing to note is that the following companies are national, meaning the quality of customer service may depend on your local team. We have tried to stay unbiased and transparent by describing both pros and cons for every provider.
More Window Companies in Windsor
Santa Rosa Window Tint
Santa Rosa, CAPrice Transparency
Free assessment
Good Customer Service
Educational Website
Services Offered
Window Replacement/Installation
Golden Heights Remodeling INC
Concord, CAFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Bay Windows
Window Replacement/Installation
Northwest Exteriors
Santa Rosa, CAPrice Transparency
Free assessment
Educational Website
Timely Service
Services Offered
Window Replacement/Installation
Vinyl Frames
Window Factory
Greenbrae, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Wood Frames
Bay Windows
Fiberglass Frames
Vinyl Frames
Glass Doors
Metal Frames
The Glass Guru
Fairfield, CAFree assessment
Good Customer Service
Educational Website
Services Offered
Screen Repair
Vinyl Frames
Tempered Glass
Glass Doors
Window Replacement/Installation
Glass Showers
Metal Frames
Mirrors
Storm/Impact Windows
Glass Repair
Wood Frames
Fiberglass Frames
Custom Glass
Triple Pane Glass
Skylights
Window Repair
Energy-Efficient Options
B & L Glass
Santa Rosa, CATimely Service
Educational Website
Services Offered
Energy-Efficient Options
Mirrors
Glass Repair
Custom Glass
Window Replacement/Installation
Glass Showers
Glass Doors
Skylights
American Window Systems, Inc.
Napa, CAFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Skylights
Window Replacement/Installation
Diablo Custom Screen & Glass
Concord, CAServices Offered
Custom Glass
Glass Showers
Bay Windows
Window Replacement/Installation
Best Exteriors
Oakland, CAPrice Transparency
Free assessment
Timely Service
Educational Website
Good Customer Service
Services Offered
Fiberglass Frames
Wood Frames
Energy-Efficient Options
Double-Hung
Bay Windows
Glass Doors
Vinyl Frames
Window Replacement/Installation
Lafayette Glass Company
Lafayette, CAPrice Transparency
Free assessment
Timely Service
Services Offered
Custom Glass
Glass Doors
Glass Showers
Mirrors
Energy-Efficient Options
Window Replacement/Installation
Window Repair
Ace Glass Company
San Francisco, CAGood Customer Service
Free assessment
Services Offered
Storm/Impact Windows
Tempered Glass
Mirrors
Window Repair
Glass Repair
Bay Windows
Glass Doors
Glass Showers
Window Replacement/Installation
Novato Glass Inc
Novato, CAFree assessment
Good Customer Service
Price Transparency
Services Offered
Skylights
Window Replacement/Installation
Glass Doors
Glass Showers
Bay Windows
Custom Glass
Energy-Efficient Options
Mirrors
Jack Smith Glass & Sash Inc.
Santa Rosa, CAGood Customer Service
Educational Website
Free assessment
Price Transparency
Services Offered
Glass Doors
Glass Showers
Window Repair
Custom Window Designs
Window Replacement/Installation
Wood Frames
Skylights
Mirrors
Diablo Glass Inc.
Concord, CAServices Offered
Window Replacement/Installation
Glass Doors
Glass Showers
Mirrors
Sunset Glass Inc
San Francisco, CAEducational Website
Free assessment
Services Offered
Wood Frames
Mirrors
Vinyl Frames
Window Replacement/Installation
Fiberglass Frames
Tempered Glass
Glass Doors
Glass Showers
Metal Frames
GreenRun Construction - General Contractors
Santa Rosa, CAPrice Transparency
Educational Website
Good Customer Service
Free assessment
Services Offered
Vinyl Frames
Bay Windows
Window Replacement/Installation
Glass Showers
Dan's Glass Inc
Concord, CAPrice Transparency
Educational Website
Timely Service
Good Customer Service
Services Offered
Mirrors
Glass Showers
Glass Repair
Window Replacement/Installation
Glass Doors
Bay Windows
Window Repair
Vallejo Glass Inc.
Vallejo, CAServices Offered
Mirrors
Energy-Efficient Options
Metal Frames
Vinyl Frames
Glass Showers
Glass Repair
Bay Windows
Custom Glass
Glass Doors
Window Replacement/Installation
Pella Windows & Doors of Northern California
Rohnert Park, CAEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Glass Doors
Bay Windows
Double-Hung
Window Replacement/Installation
Rojas Construction and Remodeling, Inc.
Walnut Creek, CAPrice Transparency
Good Customer Service
Timely Service
Free assessment
Services Offered
Window Replacement/Installation
Calculate how much you can expect to pay for window installation and replacement in Windsor, CA using our customized window cost calculator.
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 Windsor Saves You Money
There are several perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the switch are the following:
- Protect your valuables from fading: The low-emissivity coatings on many energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
- Protect your investment: The older your home is, the more likely it is that getting new windows will benefit you. Older homes usually have windows that are outdated, leaky or potentially even damaged in some way. Updating your windows could help increase the value of your property if you decide to sell.
- Save money on electricity bills: According to the Department of Energy, heat gained or lost through windows makes up around 25-30% of household energy use. Replacing your windows with energy-efficient models can help lower how much energy is used in your home, therefore saving you about 12% more on your bills.
- Reduce your carbon footprint: By using less energy after upgrading to energy-efficient windows, you’ll also be reducing your indirect greenhouse gas emissions by about 12%, according to Energy Star.
Estimated Cost of Window Replacement in Windsor
Let’s go over the cost of updating your windows and the kinds of services you may need for your home.
How Much Do New Windows Cost?
According to our market research, the average cost to replace a single window is around $600. However, window replacement costs can range from $200 to $1,200 per window. But costs will vary considerably depending on your location, the number of windows you need, the quality of your products and the current condition of your home. Many window companies also offer door installations and other add-ons like shutters, baths, coating and more. These extra services will increase overall project costs.
It’s important to note that windows with higher efficiency may cost more initially but can save you hundreds of dollars by decreasing your energy bills. Investing in Energy Star certified windows can save Windsor homeowners $418+ a year when replacing single-pane windows.
We advise getting free quotes from multiple window installers to find the one that works best for you.
What Services do Window Installers Offer?
The first thing to ask yourself when planning to replace your windows is: Should you get a full-frame installation or a pocket installation?
Full-frame installations involve replacing the complete window, including the sill, frame and trim. Full-frame installations are necessary when you want a new style or your window has significant rot or deterioration. Because these installations are more involved, they will increase the overall cost. Pocket installations (or retrofits) involve installing a new window within the existing frame, which makes pocket installations take less time and therefore cost less. But, if the frame has any rot or deterioration, you will most likely need a full-frame installation instead.
If you’re still debating which type of installation you need, you can ask your installer and get their recommendation. The choice mostly depends on the age of your window frames and if there’s any damage present.
Best Availability
Renewal by Andersen
- Great Industry Reputation
- Award-winning Company
- Member of US Green Building Council
- Manufactures products in-house
Power Home
- Uses eco-friendly materials
- Well-trained, certified installers
- Lifetime or lengthy warranty
Best for Residential Windows
Window Nation
- Custom Designs
- Wide variety of products and services
- Manufactures products in-house
How We Choose the Best Window Installers in Windsor
In our search to find the most reliable, eco-friendly window installers in Windsor, the EcoWatch team landed on the above companies as the top window installation companies in the city. Along with energy efficiency, we evaluated window companies all across the state and ranked them using the following methodology:
Service Area
Because this is a guide for Windsor, we only included companies that serve the city. There are other reputable providers that didn’t make the list because of the low odds that they would serve the average homeowner in Windsor.
Work Quality
When installing new windows, the quality and variety of services often plays just as important of a role in overall efficiency and performance as the brand of window you get. We do give window installers higher marks if they offer high-quality products, but we also factor in workmanship as reflected in customer feedback.
Customer Reviews
We analyzed patterns in recent online reviews to determine the companies with the highest rates of customer satisfaction, weighted by sample size. Customer satisfaction might be the most important factor, as it indicates the quality of services across most other categories, including warranty, cost, quality of parts, quality of installation, professionalism and more.
Cost
This one is a give-and-take: as with most services, cheap window companies may not provide the most quality service. On the other hand, we want to make sure we’re highlighting companies that offer a variety of price and financing options so they’re accessible to most homeowners.
Warranty
As discussed, windows are a serious investment, so you’ll want to be certain that investment is protected. Window installation companies that provide lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have been in the industry for a while. Window installation companies that have more years of experience are going to earn higher rankings by our standards. We like to see at least ten years of experience.
Windsor, CA Window Replacement FAQs
What is the average cost to install new windows?
The typical cost of installing a window ranges from $450 to $650. There are a variety of factors that affect how much it costs, which include the number of windows, how energy-efficient the windows are, your property’s location, the materials used in designing the windows, styles and sizes of windows and local labor costs.
What are the most common types of replacement windows?
The most common types of windows for homes include: double-hung and single-hung windows, casement windows, bay windows, awning windows, transom windows, slider windows and picture windows.
Do I really need to use a window installation company?
You should use a window installation professional whenever you want to upgrade your windows. Installing windows is a complicated process that can be difficult to do on your own, so it’s best left to the professionals.
When is the best time of year to replace windows?
Even though you can install windows any time of year, warmer weather is typically better for installing replacement windows. Additionally, the weather should be dry, because rain can make the installation harder.
How long does window installation usually take?
Each window takes around 30 minutes to install based on the kind of window. However, the window installation can be a two-day job — or more — if you have a lot of windows that have to be installed.