20 Best Window Companies in St. Helena, CA (2023 Reviews)
Looking to improve your property's value? The top window replacement companies can help.
We analyzed all the top-rated window companies in St. Helena and selected the best 20 based on:
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Customer reviews
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Window installation expertise
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Popularity with home-owners like you
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Updated September 15, 2023
Why you can trust EcoWatch
A review of the best window installation companies in St. Helena may not seem like the most captivating article on EcoWatch, but trust us, windows have more of an impact on your life than you might realize. Drafty windows can cost you in energy bills. As a matter of fact, the Department of Energy estimates that about 30% of your house's heat or cool air could be lost through your windows.
Replacement windows improve your home's insulation, not only making you more comfortable during the summer and winter, but also saving you money and helping the environment.
Unlike other sites, EcoWatch ranks window installation companies on energy efficiency while also balancing cost, customer satisfaction and service area.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
Best Window Installation & Replacement Companies in St. Helena
The EcoWatch team examined dozens of installers in St. Helena to find the best ones for our readers. The providers in this article scored best in our review categories, such as energy-efficient offerings, customer service, availability, local expertise, price and more.

Window World
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EnergyStar Partner
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Large serice area
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Low prices relative to competitors
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Great industry reputation
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Lifetime warranty
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Quality of service will depend on your area
Window World offers windows expertise in St. Helena. Window World has about 27 years of experience in the window installation business. Hundreds of positive reviews from customers online back the company's reputation.
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 provider for you.
Energy Efficiency of Window World WindowsWindow World’s commitment to sustainability can be seen in its 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 St. Helena?Pricing details are not available on Window World’s website since the cost of window installment depends on how many and what type(s) of windows you need. However, it's known for offering some of the most affordable window installations around. The best way to get more accurate information is to receive a free quote from the company.

Milgard Windows & Doors
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EnergyStar Partner
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Wide network of installers
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Lifetime warranty available
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Entails hiring third-party contractors
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Limited additional services
Milgard Windows & Doors has the best local installation in St. Helena. This provider has 60 years of experience in the windows business, and it has become one of the most respected companies in the business.
It 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 WindowsThere are a wide variety of window types that Milgard Windows & Doors offers, 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 St. Helena?Prices are not available on Milgard’s website because the cost of window replacement varies greatly depending on how many and what type(s) of windows you need. However, 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
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Great industry reputation
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Award-winning company
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Member of US Green Building Council
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Manufactures products in-house
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No lifetime warranty
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More expensive than competition
Renewal by Andersen offers the best availability in St. Helena. Andersen has about 27 years of experience in the window installation business. Hundreds of positive reviews from customers online back the company's reputation.
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 provider for you.
Energy Efficiency of Renewal by Andersen WindowsRenewal by Andersen’s commitment to sustainability can be seen in its 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 St. Helena?Pricing details are not available on Andersen’s website since the cost of window installment depends on how many and what type(s) of windows you need. However, based on customer feedback, you can expect to pay anywhere between $750 to $1,250 per window for an installation with Andersen. The best way to get more accurate information is to receive a free quote from the company.

Universal Windows Direct
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Makes charitable contributions
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Manufactures products in-house
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Wide variety of products and services
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Lifetime warranty
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Limited service area
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Some installations carried out by third-party contractors
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Quality of service will depend on your area
Universal Windows Direct has the best warranty in St. Helena. It's a company that has grown immensely since its inception in 2002, and now has several franchise dealers nationwide. This company has been in business since 2002 and currently provides services to 27 states nationwide. Many positive reviews from customers online back the provider's reputation.
Universal may be the company for you if you're looking for one that has an industry-leading warranty covering products, parts and workmanship for life.
Energy Efficiency of Universal Windows Direct WindowsUniversal Windows Direct is an Energy Star partner and has a variety of energy-efficient windows that are Energy Star certified. Note that not all of the company’s windows are Energy Star certified, so be sure to ask your Universal representative when inquiring about services.
How much does Universal Windows Direct cost in St. Helena?Universal does not outline prices on its website, but installations typically range from $225 to $425 per window based on customer feedback. That makes Universal Windows Direct more of a budget-friendly option for window repair and replacements. For more detailed information on pricing, you can get a quote from the company.
We've recommended installers with good reputations, but keep in mind some national companies have independently owned locations in St. Helena, so your service may differ depending on your local crew. We have tried to be unbiased and transparent by listing pros and cons for every company reviewed.
More Window Companies in St. Helena
Window World of Greater Sacramento
Sacramento, CA-
Free assessment
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Educational Website
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Timely Service
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Good Customer Service
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Price Transparency
Services Offered
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Double-Hung
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Sliding Glass
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Fast Delivery
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Bay Windows
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Custom Window Designs
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Window Replacement
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Residential Windows
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Glass Showers
B & L Glass
Santa Rosa, CA-
Good Customer Service
Services Offered
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Residential Windows
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Stained Glass
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Fast Delivery
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Full-Service Installations
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Double-Hung
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Bay Windows
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Glass Showers
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Custom Window Designs
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Window Replacement
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Commercial Windows
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Aluminum Window Frames
Blyss Construction Santa Rosa
Santa Rosa, CA-
Price Transparency
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Timely Service
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Free assessment
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Good Customer Service
Services Offered
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Double-Hung
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Residential Windows
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Aluminum Window Frames
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Commercial Windows
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Window Replacement
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Custom Window Designs
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Bay Windows
GreenRun Construction - General Contractors
Santa Rosa, CA-
Price Transparency
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Glass Showers
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Window Replacement
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Residential Windows
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Commercial Windows
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Bay Windows
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Custom Window Designs
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Stained Glass
Northwest Exteriors
Santa Rosa, CA-
Timely Service
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Price Transparency
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Educational Website
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Free assessment
Services Offered
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Window Replacement
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Residential Windows
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Custom Window Designs
Pella Windows & Doors of Northern California
Rohnert Park, CA-
Good Customer Service
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Free assessment
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Educational Website
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Price Transparency
Services Offered
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Sliding Glass
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Double-Hung
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Residential Windows
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Custom Window Designs
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Window Replacement
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Bay Windows
Home Services at The Home Depot
Rohnert Park, CA-
Good Customer Service
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Price Transparency
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Educational Website
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Free assessment
Services Offered
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Window Replacement
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Stained Glass
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Custom Window Designs
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Commercial Windows
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Glass Showers
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Residential Windows
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Fast Delivery
Nor Cal Glass Products
Rohnert Park, CA-
Good Customer Service
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Price Transparency
Services Offered
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Bay Windows
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Commercial Windows
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Custom Window Designs
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Residential Windows
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Glass Showers
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Window Replacement
Save Energy Windows and Doors
Petaluma, CA-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Window Replacement
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Bay Windows
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Energy-Efficient Options
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Residential Windows
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Custom Window Designs
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
Javco Window & Glass Contractors Inc
Napa, CA-
Educational Website
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Free assessment
Services Offered
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Window Replacement
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Residential Windows
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Sliding Glass
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Glass Showers
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Commercial Windows
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Custom Window Designs
The Glass Guru
Fairfield, CA-
Free assessment
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Good Customer Service
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Timely Service
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Price Transparency
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Educational Website
Services Offered
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Glass Showers
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Commercial Windows
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Custom Window Designs
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Window Repair
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Full-Service Installations
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Aluminum Window Frames
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Double-Hung
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Residential Windows
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Window Replacement
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Sliding Glass
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Stained Glass
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Tempered Glass
Window Replacement Fairfield
Fairfield, CA-
Good Customer Service
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Free assessment
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Educational Website
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Timely Service
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Price Transparency
Services Offered
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Sliding Glass
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Bay Windows
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Glass Showers
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Custom Window Designs
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Window Replacement
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Residential Windows
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Double-Hung
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Stained Glass
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Fast Delivery
Novato Glass Inc
Novato, CA-
Educational Website
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Free assessment
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Price Transparency
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Good Customer Service
Services Offered
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Residential Windows
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Commercial Windows
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Bay Windows
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Window Replacement
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Double-Hung
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Full-Service Installations
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Glass Showers
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Custom Window Designs
Tom's Glass Co.
Vacaville, CA-
Free assessment
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Educational Website
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Good Customer Service
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Price Transparency
Services Offered
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Residential Windows
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Window Replacement
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Fast Delivery
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Custom Window Designs
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Double-Hung
FitzPerfect Windows - Doors and More, Inc.
Vacaville, CA-
Educational Website
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Good Customer Service
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Free assessment
Services Offered
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Residential Windows
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Bay Windows
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Double-Hung
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Window Replacement
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Custom Window Designs
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Sliding Glass
Vallejo Glass Inc.
Vallejo, CA-
Good Customer Service
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Free assessment
Services Offered
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Window Replacement
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Double-Hung
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Fast Delivery
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Full-Service Installations
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Aluminum Window Frames
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Energy-Efficient Options
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Bay Windows
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Glass Showers
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Residential Windows
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Custom Window Designs
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Commercial Windows
Simonton Windows & Doors - Cornerstone Building Brands
Vacaville, CA-
Educational Website
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Price Transparency
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Good Customer Service
Services Offered
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Residential Windows
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Window Replacement
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Fast Delivery
Window Factory
Greenbrae, CA-
Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Custom Window Designs
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Bay Windows
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Residential Windows
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Aluminum Window Frames
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Fast Delivery
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Window Replacement
Charles Window & Door Company
San Rafael, CA-
Price Transparency
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Good Customer Service
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Free assessment
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Educational Website
Services Offered
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Fast Delivery
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Glass Showers
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Window Replacement
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Sliding Glass
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Aluminum Window Frames
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Double-Hung
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Bay Windows
Wilson Construction
El Sobrante, CA-
Good Customer Service
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Free assessment
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Timely Service
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Price Transparency
Services Offered
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Fast Delivery
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Residential Windows
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Window Replacement
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Double-Hung
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Custom Window Designs
Calculate how much you can expect to pay for window installation and replacement in St. Helena, 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 St. Helena Saves You Money
By switching to energy-efficient windows, you and your family can enjoy several benefits, such as:
- Save money on electricity bills: The Department of Energy estimates that heat gained or lost via windows accounts for around 25-30% of residential energy use. Upgrading to energy-efficient windows can help reduce that amount, which helps you save some money on your bills.
- Better temperature control in your home: When you live in a place like St. Helena where the winters can be chilly, you usually need to depend on your heater to keep your home warm. Energy-efficient windows can lower the amount of heat lost through your windows when heating your home.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Protect your investment: The older your home is, the more likely you are to benefit from switching to energy-efficient windows. Older homes tend to have windows that are outdated, drafty or potentially even damaged in some way. Updating your windows could help increase the value of your property if you decide to sell.
Estimated Cost of Window Replacement in St. Helena
Windows come in different shapes and sizes, so costs and services will differ considerably. Here are the typical costs and services that you'll find from window installation companies.
How Much Do New Windows Cost?
Generally, homeowners in St. Helena can expect that most replacement window installations will cost between $250 and $1,200, with the average cost at around $600. How much it will cost you varies depending on several factors, like number of windows, the location of your home, material, size, type and more.
It's important to remember that windows with the best 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 St. Helena homeowners $518+ a year when replacing single-pane windows.
Something else that influences the total cost is the material you choose for your frame. Aluminum frames are usually the least pricey and are sturdy and light, but they provide poor insulation. On the other hand, wood frames cost the most, as they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation as well and cost somewhere between the other two.
What Services do Window Installers Offer?
The first thing to ask yourself when getting new windows is: Should you get a full-frame installation or a pocket installation?
A full-frame installation replaces the entire window, including the windowsill, frame, trim and the window panes. Because this kind of installation is more involved, it will cost more than a pocket installation. Pocket installations are simpler and won't carry as large a bill because they involve merely replacing the window within its existing frame. But if the frame has any damage, you may have to get a full-frame installation instead.
If you're still debating which kind of installation to get, you can consult with your provider and get their recommendation. The decision mostly depends on how old the frames are and if there's any damage present.
Best Availability
Renewal by Andersen
- Great industry reputation
- Member of US Green Building Council
- Manufactures products in-house
Window Veteran
Window World
- EnergyStar Partner
- Wide variety of products and services
- Lifetime Warranty
How We Choose the Best Window Installers in St. Helena
In our search to find the most reliable, eco-friendly window installers in St. Helena, EcoWatch chose the above companies as the top window installation companies in the city. Along with energy efficiency, we assessed window companies all across the state and ranked them based on the following methodology:
Service Area
Since this is a guide for St. Helena, we paid more attention to 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 St. Helena.
Work Quality
When installing new windows, the quality and variety of services can often play just as important of a role in insulation and performance as the type of window you opt for. 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 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 professionalism, warranty, cost, quality of parts, quality of installation and more.
Cost
This one is a give-and-take: as with other services, cheap window companies are not going to provide the most quality service. Still, we want to ensure we're highlighting companies that provide a spectrum of price and financing options so they're accessible to most homeowners.
Warranty
As discussed, windows are a considerable investment, so you'll want to make sure that investment is protected. Window installation companies that have lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Lastly, we like to see companies that have a proven track record in the industry. Window installers 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.
St. Helena, CA Window Replacement FAQs
How much does a window install cost?
The average cost of installing a single window can range between $450 and $650. There are a variety of factors that affect the cost, including the materials used in designing the windows, styles and sizes of windows, your property's location, the number of windows, local labor costs and how energy-efficient the windows are.
What are the different types of windows?
There are various types of windows you can get for your house, including awning windows, picture windows, casement windows, double-hung and single-hung windows, bay windows, transom windows and slider windows.
Can I replace my own windows?
While it is possible to install your own windows, doing so requires a lot of time and experience with home improvement projects. Hiring a professional can help ensure that the job is done properly and that you can avoid spending the time and effort of doing it yourself.
Should I replace my windows all at the same time?
If you want to get more efficient windows and save money on energy costs, replacing all your windows at once is the only way to see a noticeable difference. However, if you have just a few windows that are damaged or drafty, you can replace just those.