20 Best Window Companies in San Marcos, CA (2023 Reviews)
If you're thinking about upgrading to new windows, our list of the best window installation companies can help.
We analyzed all the top-rated window companies in San Marcos 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 top window installation companies in San Marcos may not seem like the most compelling article on the EcoWatch site, but trust us, windows impact your life more than you might realize. If your house has outdated, drafty windows, your HVAC system could be working overtime to heat or cool your house. This means spending more on electric bills.
Replacement windows improve the insulation in your home, not only making you more comfortable during the summer and winter, but also saving you some money and helping the environment.
Unlike other review sites, EcoWatch ranks window replacement companies based on energy efficiency while also taking into consideration 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 San Marcos
The EcoWatch team evaluated dozens of window installation companies across San Marcos to narrow our list down to the best ones. We assessed the installers on their energy-efficient offerings, customer service, local experience, coverage area, 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 San Marcos. Window World has around 27 years of experience in the window installation industry.
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 perfect 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 San Marcos?Window World doesn’t have any cost information displayed on its website, but it's known for offering some of the most affordable window installations around. For more accurate information on the cost, you can inquire about a 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 is a family-owned and -operated window replacement company, which primarily serves the West Coast. Milgard has around 60 years of experience in the window installation industry. Many positive reviews on customer review websites back the company's reputation.
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 perfect provider for you.
Energy Efficiency of Milgard Windows & Doors WindowsThe 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 offerings are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Milgard Windows & Doors cost in San Marcos?Though pricing information is not available on Milgard’s website, 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
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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 is a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window installation industry. Many positive reviews on customer review websites 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 perfect provider for you.
Energy Efficiency of Renewal by Andersen WindowsA 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 offerings are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Renewal by Andersen cost in San Marcos?Though pricing information is not available on Andersen’s website, 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.

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 provides the best warranty in San Marcos. Universal has about 20 years of experience in the windows industry, and it currently serves 27 states nationwide. Many positive reviews from customers online back the provider's reputation.
If you’re looking for a company that has an industry-leading warranty covering products, parts and workmanship for life, this may be the perfect provider for you.
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 San Marcos?Prices aren’t available on Universal’s 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. If you’d like to know for sure, you can receive a quote on the company’s website.
We strive to remain unbiased and transparent by describing pros and cons for each company we review. Additionally, our rankings are not influenced by any partnerships.
More Window Companies in San Marcos
Renewal by Andersen of Greater San Diego
San Diego, CA-
Price Transparency
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Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Sliding Glass
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Aluminum Window Frames
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Window Replacement
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Double-Hung
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Energy-Efficient Options
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Custom Window Designs
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Residential Windows
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Fast Delivery
Window World of San Diego
San Marcos, CA-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
Services Offered
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Residential Windows
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Custom Window Designs
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Window Replacement
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Double-Hung
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Bay Windows
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Sliding Glass
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Fast Delivery
The Glass Guru
Carlsbad, CA-
Timely Service
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Price Transparency
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Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Window Repair
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Aluminum Window Frames
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Residential Windows
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Double-Hung
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Window Replacement
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Glass Showers
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Custom Window Designs
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Tempered Glass
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Full-Service Installations
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Commercial Windows
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Stained Glass
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Sliding Glass
Coughlin Windows & Doors Inc
Escondido, CA-
Price Transparency
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Timely Service
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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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Sliding Glass
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Double-Hung
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Commercial Windows
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Window Repair
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Energy-Efficient Options
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Residential Windows
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Window Replacement
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Bay Windows
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Custom Window Designs
The Window Shoppe
Vista, CA-
Price Transparency
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Educational Website
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Free assessment
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Good Customer Service
Services Offered
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Custom Window Designs
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Full-Service Installations
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Residential Windows
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Window Replacement
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Sliding Glass
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Energy-Efficient Options
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Double-Hung
Pelican Replacement Windows
Vista, CA-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Full-Service Installations
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Residential Windows
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Double-Hung
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Custom Window Designs
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Fast Delivery
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Window Replacement
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Sliding Glass
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Energy-Efficient Options
US Window & Door - Carlsbad
Carlsbad, CA-
Free assessment
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Price Transparency
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Good Customer Service
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Educational Website
Services Offered
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Residential Windows
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Window Replacement
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Commercial Windows
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Aluminum Window Frames
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Double-Hung
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Sliding Glass
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Custom Window Designs
360 Windows and Doors
Escondido, CA-
Timely Service
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Free assessment
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Commercial Windows
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Fast Delivery
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Window Replacement
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Full-Service Installations
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Custom Window Designs
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Residential Windows
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Double-Hung
Home Services at The Home Depot
Oceanside, CA-
Price Transparency
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Free assessment
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Educational Website
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Good Customer Service
Services Offered
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Window Replacement
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Stained Glass
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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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Double-Hung
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Fast Delivery
Newman Windows and Doors - Carlsbad
Carlsbad, CA-
Free assessment
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Educational Website
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Price Transparency
Services Offered
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Window Replacement
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Custom Window Designs
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Aluminum Window Frames
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Bay Windows
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Sliding Glass
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Residential Windows
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Double-Hung
Advanced Window
Valley Center, CA-
Educational Website
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Free assessment
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Price Transparency
Services Offered
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Commercial 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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Window Replacement
JWG Windows & Doors Inc.
Poway, CA-
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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Custom Window Designs
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Sliding Glass
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Window Replacement
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Double-Hung
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Commercial Windows
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Energy-Efficient Options
Dreamstyle Remodeling
San Diego, CA-
Free assessment
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Good Customer Service
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Educational Website
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Price Transparency
Services Offered
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Bay Windows
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Window Replacement
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Double-Hung
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Glass Showers
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Fast Delivery
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Residential Windows
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Custom Window Designs
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Full-Service Installations
American Vision Windows
San Diego, CA-
Free assessment
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Good Customer Service
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Price Transparency
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Educational Website
Services Offered
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Energy-Efficient Options
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Stained Glass
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Window Replacement
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Double-Hung
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Custom Window Designs
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Glass Showers
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Sliding Glass
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Aluminum Window Frames
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Fast Delivery
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Residential Windows
Select Home Improvements San Diego
San Diego, CA-
Price Transparency
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Good Customer Service
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Educational Website
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Free assessment
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Timely Service
Services Offered
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Bay Windows
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Window Replacement
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Glass Showers
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Custom Window Designs
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Double-Hung
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Sliding Glass
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Residential Windows
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Tempered Glass
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Commercial Windows
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Aluminum Window Frames
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Energy-Efficient Options
US Window & Door - San Diego
San Diego, CA-
Good Customer Service
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Educational Website
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Free assessment
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Price Transparency
Services Offered
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Aluminum Window Frames
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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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Commercial Windows
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Double-Hung
BM Windows
San Diego, 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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Commercial Windows
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Custom Window Designs
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Energy-Efficient Options
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Window Replacement
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Fast Delivery
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Residential Windows
Skye Walls San Diego
San Diego, CA-
Free assessment
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Price Transparency
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Timely Service
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Good Customer Service
Services Offered
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Window Replacement
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Custom Window Designs
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Fast Delivery
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Full-Service Installations
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Residential Windows
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Sliding Glass
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Commercial Windows
Discount Door and Window
San Diego, CA-
Free assessment
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Price Transparency
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Educational Website
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Good Customer Service
Services Offered
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Sliding Glass
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Energy-Efficient Options
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Window Replacement
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Custom Window Designs
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Residential Windows
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Double-Hung
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Fast Delivery
Tough Turtle Windows
San Diego, CA-
Free assessment
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Good Customer Service
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Educational Website
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Price Transparency
Services Offered
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Double-Hung
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Energy-Efficient Options
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Custom Window Designs
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Sliding Glass
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Window Replacement
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Residential Windows
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Commercial Windows
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Fast Delivery
Calculate how much you can expect to pay for window installation and replacement in San Marcos, 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 San Marcos Saves You Money
Switching to energy-efficient windows can improve the comfort of your home and help you save on energy bills. Here's more information on how switching out your windows could help you:
- More efficient energy usage in your household: Because the winters can get very chilly in San Marcos, homeowners usually rely on their heater a lot. Energy-efficient windows cut back on how much heat is lost through your windows, which makes it easier to keep your home warm.
- Reduce your carbon footprint: You can reduce your indirect greenhouse gas emissions by about 12% when you install Energy Star certified windows. In San Marcos, that's about 117 pounds per year on average.
- Protect your investment: If your home is on the older side, your windows are most likely outdated. Updating your windows can improve the insulation in your home and also help raise the value of your house if you decide to sell.
- 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.
Estimated Cost of Window Replacement in San Marcos
Each window replacement company provides varying services and has varying prices based on a few factors.
How Much Do New Windows Cost?
On average, homeowners in San Marcos can expect that most replacement window installations will cost between $250 and $1,200, with the average cost at around $600. These figures vary depending on specific characteristics of your installation, like size, number of windows, the location of your home, type, material and more.
It's also worth noting that energy-efficient windows will typically cost more initially, but Energy Star estimates that switching out the windows on your San Marcos home can mean an average energy savings of $236 to $319 a year for single-pane window replacement, or between $87 to $126 a year for double-pane windows. The amount of money you'll save by switching to energy-efficient windows varies based on your local climate, energy rates and other factors unique to your home.
Something else that influences the total cost is the material of the frame you pick. Aluminum frames are typically the least pricey and are sturdy and relatively maintenance-free, but they provide poor insulation. On the other hand, wood frames cost the most because they are aesthetically pleasing and provide decent insulation. Fiberglass and vinyl frames provide good insulation and cost somewhere between the other two.
What Services do Window Installers Offer?
In regard to window installations, there are generally two kinds that your provider will offer: full-frame and pocket installations.
A full-frame installation is a replacement of the total window. This service involves removing the old window, the windowsill, and the exterior and interior trim. It can also involve additional materials, like insulation and drip edges, which raise the overall cost of the project. It's also worth noting that you may have to touch up the paint surrounding the window after a full-frame installation. A pocket installation involves replacing a window within the frame that's already there. So, instead of tearing out the whole window and rebuilding it, the contractor will just put the replacement window (also called a retrofit or insert window) into the frame.
Your window replacement company should be able to help you understand what's best for your needs. In San Marcos, the decision will mostly depend on how old your windows are and if there's any damage. Wood can decay if not properly maintained over the years, so it's good to have a professional assess your frames and window sills.
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 San Marcos
In our search to find the most reliable, eco-friendly window installers in San Marcos, EcoWatch landed on the above companies as the best window installation companies in the city. We have evaluated the best window replacement companies in San Marcos primarily based on their energy efficient offerings, as it's the most sustainable option and the best one for homeowners. Energy-efficient windows can lower energy bills by hundreds of dollars. Along with energy efficiency, our rating methodology is based on the following factors:
Service Area
Because this is a guide for San Marcos, we gave more points to companies that provide services to the city. There are certainly reputable providers that didn't make the list because they wouldn't be able to serve homeowners in San Marcos.
Work Quality
When picking new windows, the quality and variety of services can often play just as important of a role in insulation and performance as the brand you choose. 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
Another self-explanatory yet very important review factor is customer feedback. If the majority of customers don't have positive things to say about their service from a certain company, it won't be featured on EcoWatch.
Cost
Cheaper windows don't necessarily mean better windows, but we know many of our readers would like to keep costs low when possible. When analyzing providers' prices, we gave higher scores to companies with reasonable prices and accessible financing rather than "cheaper" services.
Warranty
As discussed, windows are a considerable investment, so you'll want to make sure that investment is protected. Window installation companies that offer lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Last but not least, we like to see companies that have a good track record in the industry. Window installation companies that have more experience will earn higher rankings by our standards. We like to see at least ten years of experience.
San Marcos, CA Window Replacement FAQs
What is the average cost to install new windows?
The average cost to replace a window can range between $450 and $650. There are a variety of factors that influence the cost, including the number of windows, styles and sizes of windows, your property's location, how energy-efficient the windows are, local labor costs and the materials used in designing the windows.
What are the most common types of replacement windows?
The most common kinds of windows for homes include: bay windows, slider windows, double-hung and single-hung windows, picture windows, transom windows, awning windows and casement windows.
What services do window replacement companies offer?
Window installation professionals will do the entire process — from replacing your old windows with new ones to cleaning up afterward. In addition, a lot of companies offer window manufacturing, customization and repairs.
What time of year is a good time to replace my windows?
Replacement windows can be installed at any time, but autumn might be the best season. No matter when you install them, the contractors will take steps to ensure that too much hot or cold air doesn't get into your home, so the temperature outside doesn't necessarily matter that much. Most importantly, the weather should be dry.
How often should you replace windows?
Windows have an average lifespan of about 20 to 30 years. If your windows are older than that, they probably need to be replaced. Apart from that, if your windows have any damage on them, or they have become difficult to operate, they may be in need of replacement.