20 Best Window Companies in Piedmont, CA (2025 Reviews)
Looking to upgrade your home's windows? We’ve got all the information you need in this list of the best window installation companies.
We analyzed all the top-rated window companies in Piedmont 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
A guide on the best window replacement companies in Piedmont may not seem like the most riveting article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might realize. During the hot summer months, the last thing you want is your cool air to leak out of your outdated windows.
Thankfully, helping you save money with more efficient windows also aligns with our goals of conserving energy and the resources it takes to generate it.
Because windows are so important for your home, picking the right company for you is a big decision to make. That’s why the EcoWatch team has made this list of the top window replacement companies, so you can more easily make an informed decision.
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 Piedmont
The EcoWatch team researched dozens of companies that service the Piedmont area to find the best window installation companies that fit our standards. The providers we’ve reviewed in this article scored best in our categories, which include energy-efficient offerings, customer service, price, 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 is the largest window replacement company in the country, known for its vinyl windows and affordability. This provider has 27 years of experience in the window installation industry, and it has become one of the best companies in the business. The company has many glowing reviews from customers online.
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, this may be the provider for you.
Energy Efficiency of Window World WindowsThere are a wide range of window types available from Window World, some of which are Energy Star products. 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 Piedmont?Window World doesn’t have any pricing information available on its website, but it's known for offering some of the most affordable window installations around. Receiving a free quote on its website is the best way to get more accurate information.

Milgard Windows & Doors
EnergyStar Partner
Wide network of installers
Lifetime warranty available
Entails hiring third-party contractors
Limited additional services
Milgard Windows & Doors is a family-owned and -operated window replacement company, which primarily serves the West Coast. This provider has 60 years of experience in the window installation industry, and it has become one of the best companies in the business. The company has many glowing reviews from customers online.
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, this may be the provider for you.
Energy Efficiency of Milgard Windows & Doors WindowsThere are a wide range of window types available from Milgard Windows & Doors, some of which are Energy Star products. 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 Piedmont?Milgard doesn’t have any pricing information available on its website, but it offers different kinds of windows at varying price points. Receiving a free quote on its website is the best way to get more accurate information.

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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This provider has 27 years of experience in the window installation industry, and it has become one of the best companies in the business. The company has many glowing reviews from customers online.
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, this may be the provider for you.
Energy Efficiency of Renewal by Andersen WindowsThere are a wide range of window types available from Renewal by Andersen, some of which are Energy Star products. 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 Piedmont?Andersen doesn’t have any pricing information available 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. Receiving a free quote on its website is the best way to get more accurate information.
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 remain unbiased and transparent by listing both pros and cons for each provider.
More Window Companies in Piedmont
Renewal by Andersen of San Francisco
Hayward, CAFree assessment
Educational Website
Price Transparency
Good Customer Service
Services Offered
Bay Windows
Double-Hung
Skylights
Window Replacement/Installation
Glass Doors
Golden Heights Remodeling INC
Concord, CAFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Bay Windows
Cal Coast Window & Door
Pleasanton, CAFree assessment
Good Customer Service
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Glass Doors
Bay Windows
Energy-Efficient Options
Mr Window Replacement
Fremont, CAGood Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Bay Windows
Vinyl Frames
Quality Windows & Doors
Pleasanton, CAFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Glass Doors
Window Replacement/Installation
GENERAL B CONTRACTOR
San Jose, CAPrice Transparency
Free assessment
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
Santa Rosa Window Tint
Santa Rosa, CAEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Window Factory
Greenbrae, CAGood Customer Service
Free assessment
Educational Website
Services Offered
Vinyl Frames
Bay Windows
Wood Frames
Metal Frames
Window Replacement/Installation
Glass Doors
Fiberglass Frames
Alexander Company
Burlingame, CAFree assessment
Good Customer Service
Price Transparency
Services Offered
Skylights
Window Replacement/Installation
Window Repair
Glass Doors
Bay Windows
The Glass Guru
Fairfield, CAFree assessment
Good Customer Service
Educational Website
Services Offered
Metal Frames
Skylights
Fiberglass Frames
Glass Showers
Energy-Efficient Options
Screen Repair
Storm/Impact Windows
Mirrors
Window Replacement/Installation
Vinyl Frames
Glass Doors
Tempered Glass
Custom Glass
Glass Repair
Window Repair
Triple Pane Glass
Wood Frames
Bay Builders and Remodeling Inc.
San Jose, CAEducational Website
Price Transparency
Good Customer Service
Free assessment
Services Offered
Window Replacement/Installation
Bay Windows
Sivan Windows and Doors - San Jose Window and Door Replacement Company
San Jose, CAGood Customer Service
Price Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Glass Doors
American Window Specialist
Campbell, CAFree assessment
Services Offered
Bay Windows
Window Replacement/Installation
Window Repair
Glass Doors
Vinyl Frames
Double-Hung
Northwest Exteriors
Santa Rosa, CATimely Service
Price Transparency
Educational Website
Free assessment
Services Offered
Window Replacement/Installation
Vinyl Frames
Custom Exteriors, Inc
Pleasanton, CAGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Bay Windows
Energy-Efficient Options
Window Replacement/Installation
Glass Doors
Custom Window Designs
R & M Quality Windows & Doors
Newark, CAFree assessment
Good Customer Service
Educational Website
Price Transparency
Timely Service
Services Offered
Glass Doors
Bay Windows
Window Replacement/Installation
Integrity Windows & Doors
San Jose, CAGood Customer Service
Price Transparency
Services Offered
Fiberglass Frames
Glass Doors
Window Replacement/Installation
Vinyl Frames
Bay Windows
Wood Frames
Metal Frames
B & L Glass
Santa Rosa, CATimely Service
Educational Website
Services Offered
Skylights
Glass Doors
Energy-Efficient Options
Mirrors
Window Replacement/Installation
Glass Repair
Custom Glass
Glass Showers
East County Glass & Window, Inc.
Pittsburg, CAEducational Website
Services Offered
Glass Doors
Glass Showers
Bay Windows
Mirrors
Window Replacement/Installation
American Window Systems, Inc.
Napa, CAFree assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Window Replacement/Installation
Skylights
Calculate how much you can expect to pay for window installation and replacement in Piedmont, 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 Piedmont Saves You Money
There are quite a few perks of upgrading to energy-efficient windows. A few reasons you may want to consider making the change are the following:
- Protect your investment: When you have an older home, your windows could also be outdated or damaged. Upgrading your windows is an important part of maintaining your property and its value.
- Reduce your carbon footprint: By using less energy once you upgrade to energy-efficient windows, you’ll also be lowering your carbon dioxide emissions by about 12%, according to Energy Star.
- Save on energy bills: Upgrading to energy-efficient windows lowers your energy bills by about 12% because you use less energy.
- Protect your valuables from fading: The low-emissivity coatings on some energy-efficient windows filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
Estimated Cost of Window Replacement in Piedmont
Each window installation company provides varying services and has varying costs based on several factors.
How Much Do New Windows Cost?
Though the national average cost to replace one window is about $600, it can range anywhere from $200 to $1,200. How much it will cost varies based on several factors, such as the location of your home, number of windows, material, size, type and more.
Whether or not you want energy-efficient windows is another factor that will determine the cost. These will typically cost more than other windows, but on the other hand, you can save about $531 a year on your energy bills in Piedmont.
The cost of your window installation will also vary depending on the kind of material you choose for the frames. Wood windows are typically the most expensive, but 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, there are generally two kinds that your provider will offer: full-frame and pocket installations.
Full-frame installations are usually done when you want to change the style of your windows or your window has a lot of rot or deterioration. With this service, your professionals will replace the whole window, including the trim, sill and frame. Pocket installations (also known as retrofits) are when you replace a window within its existing frame. Pocket installations are simpler and won’t cost as much, but you can’t do this type of installment if you have any pre-existing rot or water damage.
If you’re still trying to decide which kind of installation to get, you can consult with your installer and get their advice. The choice mostly is influenced by 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 Piedmont
The EcoWatch Reviews team differs from other reviewers because we look at these companies through a sustainability lens. Along with energy efficiency, we assessed each installer and ranked them using the following methodology:
Service Area
This one is self-explanatory, but we’ve chosen to highlight window installation companies that serve the Piedmont area so you can find the best window installation company near you.
Work Quality
When choosing new windows, the quality and range of services can often play just as important of a role in overall efficiency and performance as the brand you choose. We do rate window installers higher if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
We analyzed trends in recent customer feedback to find the companies with the highest rates of customer satisfaction. Customer satisfaction might be the factor we place the most value on, as it indicates the quality of services across nearly every category, including cost, warranty, quality of parts, professionalism, quality of installation and more.
Cost
This one is a give-and-take: as with other services, cheap window installers may not provide the most quality service. Still, we want to ensure we’re highlighting companies that offer a variety 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 give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Piedmont’s climate, homeowners need to be wary of low efficiency, rot and water damage. We factored in local experience to reflect the ability of Piedmont window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
Piedmont, CA Window Replacement FAQs
What is the average cost to install new windows in a home?
The national average cost to install a single window is around $600 but can range between $200 and $1,200, based on a variety of factors. The price is generally influenced by the location of your property, the size of the window and the type and material of the window. Also, bear in mind that energy-efficient windows may cost more upfront but can save you a decent amount of money a year in energy bills.
What type of window is the most energy-efficient?
A window’s energy efficiency depends on a variety of factors, including the quality of the installation and the kind of window. Look for Energy Star Certified windows — these are often the most energy-efficient and are certified by the U.S. Department of Energy.
Do I really need to use a window installation company?
You should hire a window installation professional whenever you want to replace your windows. Installing windows is a involved process that can take a lot of time, so it’s best handled by the professionals.
How long does it usually take to install windows?
Since the average installation time is 30 minutes per window, around 16 windows can be installed during a typical 8-hour work day.