20 Best Window Companies in Lennox, CA (2025 Reviews)
When you need to replace your windows, our list of the best window installation companies can help you find the provider for you.
We analyzed all the top-rated window companies in Lennox 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
Although environmentally friendly energy sources like wind and solar are important when it comes to lowering your carbon footprint, improving your home’s efficiency can also have a large impact on home energy conservation. According to the Department of Energy, heat or cool air lost through outdated, drafty windows could represent 25-30% of heating and cooling costs.
That’s bad for your bank account and the environment, but one of the best window installation companies can help you with that.
So if you’re constructing a new home, renovating or replacing your windows in Lennox, this is the best place to get started.
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 Lennox
The EcoWatch Reviews team assessed several window installation companies across Lennox to narrow our list down to the top ones. The providers we’ve reviewed in this article scored best in our categories, which include energy-efficient offerings, availability, price, customer service 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 Lennox. It's the largest window replacement company in the country, known for its vinyl windows and affordability. This company has 27 years of experience in the windows business, and it has become one of the most respected companies in Lennox.
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 is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to mention that you want energy-efficient windows to your Window World representative when inquiring about services.
How much does Window World cost in Lennox?Prices aren’t available on Window World’s website, but it's known for offering some of the most affordable window installations around. If you’d like more accurate pricing 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 Lennox. It's a family-owned and -operated window replacement company, which primarily serves the West Coast. This company has 60 years of experience in the windows business, and it has become one of the most respected companies in Lennox.
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 is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to mention that you want energy-efficient windows to your Milgard representative when inquiring about services.
How much does Milgard Windows & Doors cost in Lennox?Prices aren’t available on Milgard’s website, but it offers different kinds of windows at varying price points. If you’d like more accurate pricing 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 Lennox. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. This company has 27 years of experience in the windows business, and it has become one of the most respected companies in Lennox.
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 is an Energy Star partner and offers a variety of energy-efficient windows. Note that not all of the company’s windows are Energy Star certified, so be sure to mention that you want energy-efficient windows to your Andersen representative when inquiring about services.
How much does Renewal by Andersen cost in Lennox?Prices aren’t available on Andersen’s 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 pricing information, you can receive a quote on the company’s website.
One thing to note is that the following companies are national, which means the quality of the service may vary depending on your local team. We have tried to be unbiased and transparent by listing both pros and cons for every company.
More Window Companies in Lennox
Renewal by Andersen of Los Angeles
Torrance, CAFree assessment
Financing options available
31,000+ projects completed
Price Transparency
Educational Website
In-home or virtual consultations
Good Customer Service
Services Offered
Bay Windows
Skylights
Window Replacement/Installation
Double-Hung
Glass Doors
Discount Window And Door
Redondo Beach, CAPrice Transparency
Good Customer Service
Free assessment
Services Offered
Skylights
Metal Frames
Vinyl Frames
Glass Doors
Window Replacement/Installation
Energy-Efficient Options
Smart Window Company
Torrance, CAGood Customer Service
Free assessment
Educational Website
Price Transparency
Services Offered
Window Replacement/Installation
Double-Hung
Vinyl Frames
Energy-Efficient Options
Tempered Glass
Glass Doors
Concierge Home Remodeling
Tarzana, CAEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Energy-Efficient Options
Window Replacement/Installation
Harbor Construction
Huntington Beach, CAGood Customer Service
Timely Service
Price Transparency
Free assessment
Educational Website
Services Offered
Energy-Efficient Options
Bay Windows
Double-Hung
Glass Doors
Vinyl Frames
Window Replacement/Installation
Dede Windows and Doors / window replacement
Anaheim, CAEducational Website
Free assessment
Good Customer Service
Price Transparency
American-made vinyl
Energy-efficient windows and doors
Educational website
Services Offered
Window Replacement/Installation
Custom Window Designs
Vinyl Frames
Glass Doors
Hometime Windows & Doors
Glendora, CAEducational Website
Good Customer Service
Price Transparency
Free assessment
Services Offered
Glass Doors
Energy-Efficient Options
Window Replacement/Installation
SoCal Window Pros
San Dimas, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Window Replacement/Installation
California Window & Solar
Costa Mesa, CAEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Vinyl Frames
Metal Frames
Golden Age Builders
West Hollywood, CAIn-home consultations
Good Customer Service
Unique window options
Timely Service
Price Transparency
3D design and planning tool
Free assessment
Services Offered
Window Replacement/Installation
CGH Solutions - California Green Home Solutions
Van Nuys, CAGood Customer Service
Price Transparency
Educational Website
Services Offered
Vinyl Frames
Window Replacement/Installation
Double-Hung
Glass Doors
Energy-Efficient Options
Save-On Glass & Screen
Westminster, CAGood Customer Service
Timely Service
Free assessment
Services Offered
Window Repair
Mirrors
Glass Showers
Window Replacement/Installation
Glass Doors
Window King
Huntington Beach, CAEducational Website
Price Transparency
Free assessment
Services Offered
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Double-Hung
Vinyl Frames
Best Windows and Doors OC
Anaheim, CAFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Glass Doors
Vinyl Frames
Window Replacement/Installation
Custom Window Designs
TMC Windows & Doors
Orange, CAFree assessment
Good Customer Service
Price Transparency
Services Offered
Glass Doors
Window Replacement/Installation
Energy Core Construction
Anaheim, CAGood Customer Service
Free assessment
Price Transparency
Timely Service
Educational Website
Services Offered
Bay Windows
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
Mancino Door & Window, Inc.
Glendora, CAEducational Website
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Can-Do Windows & Doors
Santa Ana, CAEducational Website
Free assessment
Price Transparency
Services Offered
Metal Frames
Fiberglass Frames
Vinyl Frames
Wood Frames
Window Replacement/Installation
Double-Hung
Glass Doors
Energy-Efficient Options
American Vision Windows
Simi Valley, CAPrice Transparency
Free assessment
Educational Website
Services Offered
Window Replacement/Installation
Bay Windows
Fiberglass Frames
Energy-Efficient Options
Glass Doors
Double-Hung
Wood Frames
Vinyl Frames
Home Upgrade Specialist Inc
Los Angeles, CAEducational Website
Free assessment
Financing options available
Wide range of services
Timely Service
Good Customer Service
Price Transparency
Energy-efficient products
Services Offered
Window Replacement/Installation
Energy-Efficient Options
Calculate how much you can expect to pay for window installation and replacement in Lennox, 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 Lennox Saves You Money
Switching to energy-efficient windows can improve the comfort of your home and help you save on power bills. Here are more ways upgrading your windows could benefit you:
- Protect your investment: The older your home is, the more likely it is that switching to energy-efficient windows will benefit you. Older homes usually have windows that are outdated, leaky or potentially even damaged in some way. Upgrading your windows could help increase the value of your home if you decide to sell.
- Reduce your carbon footprint: You can reduce your indirect greenhouse gas emissions by about 12% after you install Energy Star certified windows. In Lennox, that’s about 117 pounds per year on average.
- Protect your valuables: Many energy-efficient windows have low-emissivity coatings, which not only insulate your home better, but also filter out damaging UV rays, preventing fading of your furniture, carpet and other valuables.
- Save on electricity bills: Since energy-efficient windows decrease the amount of energy needed to heat or cool your home, the switch can help you save about $509 annually on your energy bills in Lennox.
Estimated Cost of Window Replacement in Lennox
Each window replacement company provides varying services and has different price points depending on several factors.
How Much Do New Windows Cost?
Though the national average cost of replacing one window is around $600, it can range anywhere from $200 to $1,200. How much it will cost varies based on several factors, such as type, size, number of windows, the location of your home, material and more.
It’s important to keep in mind that windows with higher efficiency may cost more upfront but can save you hundreds of dollars by lowering your energy bills. Investing in certified energy-efficient windows can save Lennox homeowners $509+ a year when replacing single-pane windows.
Requesting free quotes from multiple installers is the best way to find out which one is right for you.
What Services do Window Installers Offer?
When considering window replacements, in general there are two types that your installer will have: full-frame and pocket installations.
Full-frame installations are necessary when you want a new style or your window has a lot of rot. With this service, your installers will replace the total window, including the trim, sill and frame. A pocket installation entails replacing a window without replacing the frame. So, instead of taking out the whole window and rebuilding it, the window installer will just put the replacement window (also called a retrofit or insert window) into the frame.
Your window installation company should be able to help you decide which type of installation you should get.
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 Lennox
In our hunt to find the most reliable, eco-friendly window installers in Lennox, the EcoWatch Reviews team chose the above companies as the best window installation companies in the city. Along with energy efficiency, we reviewed several window installers in Lennox and assigned rankings using the following methodology:
Service Area
Because this is a guide for Lennox, we gave more points to companies that serve the city. There are other reputable providers that didn’t make the cut because of the low odds that they would serve the average homeowner in Lennox.
Work Quality
When selecting new windows, the quality and variety of services can often play just as important of a role in overall efficiency and performance as the brand of window you choose. We do give window installers higher marks if they offer high-quality products, but we also consider 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 feedback about their service from a certain company, it won’t be featured on EcoWatch.
Cost
Cheaper windows certainly don’t mean better windows, but we know many of our readers would like to keep costs as low as possible. When analyzing the prices of providers, we awarded higher scores to companies with reasonable prices and accessible financing rather than “cheaper” services.
Warranty
As discussed previously, windows are a hefty investment, so you’ll want to be certain that investment is well protected. Window installation companies that give you lengthy warranties for products, parts and installation (aka workmanship) rank higher with EcoWatch.
Years of Experience
Because of Lennox’s climate, homeowners need to be wary of rot, low efficiency and water damage. We factored in local experience to reflect the ability of Lennox window companies to prepare homes for the climate. If a company has less than 10 years of experience, it loses points in this category.
Lennox, CA Window Replacement FAQs
How much should a window install cost?
The typical cost of installing a single window can range from $450 to $650. There are several factors that influence how much it costs, including the number of windows, the materials used in designing the windows, local labor costs, how energy-efficient the windows are, your property’s location and styles and sizes of windows.
What are the most common kinds of replacement windows?
There are various kinds of windows you can get for your house, such as picture windows, casement windows, bay windows, transom windows, awning windows, double-hung and single-hung windows and slider windows.
Can I install my own windows?
Even though you can install your own windows, doing so requires a lot of time and experience with home improvement projects. Using a window replacement company can help guarantee that the job is done properly and that you can avoid spending the time and effort of doing it yourself.
Should I replace all my windows at once?
If your windows are greater than 20 years old, you most likely need to replace all of them. By that point, they are often less efficient, draftier and/or more damaged than new windows. Replacing your windows all at once will involve less paperwork and less time.