20 Best Window Companies in El Cajon, CA (2025 Reviews)
If you’re looking to get new windows, our guide to the top window installation companies can help.
We analyzed all the top-rated window companies in El Cajon 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 review of the best window replacement companies in El Cajon may not seem like the most compelling article on the EcoWatch site, but trust us, windows have more of an impact on your life than you might think. According to the Department of Energy, heat or cool air lost through old or damaged windows could be responsible for 25-30% of residential energy climate control use.
Fortunately, saving you money with upgraded windows also helps our goals of conserving energy and the resources it takes to produce it.
As windows are so important for your home, picking the right company for you is a big choice to make. That’s why the EcoWatch team has created this list of the best 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 El Cajon
The EcoWatch Reviews team examined dozens of providers that service the El Cajon area to find the best window installation companies by our standards. The providers mentioned in this article scored best in our review categories, such as energy-efficient offerings, local expertise, price, customer service, availability and more.

Window World
EnergyStar Partner
Large serice area
Low prices relative to competitors
Great industry reputation
Lifetime warranty
Quality of service will depend on your area
Window World offers windows expertise in El Cajon. It's the largest window replacement company in the country, known for its vinyl windows and affordability. Window World has around 27 years of experience in the window installation business.
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 right company for you.
Energy Efficiency of Window World WindowsIts high-performance Low-E (low-emissivity) coatings and argon gas insulation offer exceptional efficiency and performance for any home. Not all of Window World’s windows are Energy Star certified, so be sure to mention that you’d like Energy Star windows when inquiring.
How much does Window World cost in El Cajon?Prices aren’t mentioned 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 get 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 offers the best local installation in El Cajon. It's 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 business.
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 right company 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 windows 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 El Cajon?Prices aren’t mentioned 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 get 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 offers the best availability in El Cajon. It's a subsidiary of the Andersen Corporation, a major manufacturer of windows and doors. Andersen has around 27 years of experience in the window installation business.
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 right company 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 windows 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 El Cajon?Prices aren’t mentioned 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 get a quote on the company’s website.
We’ve recommended companies with shining reputations, but note that these are national companies, so your service may vary depending on your local crew. We have tried to be unbiased and transparent by describing pros and cons for every company reviewed.
More Window Companies in El Cajon
Renewal by Andersen of Greater San Diego
San Diego, CAFree assessment
Price Transparency
Good Customer Service
Educational Website
Services Offered
Double-Hung
Bay Windows
Window Replacement/Installation
Glass Doors
DaBella
San Diego, CATimely Service
Limited lifetime warranty
Good Customer Service
Wide range of services
Financing options available
Services Offered
Glass Doors
Vinyl Frames
Window Replacement/Installation
Double-Hung
Call My Guy
La Mesa, CAPrice Transparency
Educational Website
Small business
Wide range of services
Free assessment
Transparent pricing
Good Customer Service
Services Offered
Window Replacement/Installation
Clear Concepts Window & Door
San Diego, CAGood Customer Service
Educational Website
Free assessment
Price Transparency
Services Offered
Glass Doors
Window Replacement/Installation
Double-Hung
Designer Window Supply
San Diego, CAEducational Website
Free assessment
Price Transparency
Good Customer Service
Services Offered
Glass Doors
Skylights
Window Replacement/Installation
Double-Hung
360 Windows and Doors
Escondido, CATimely Service
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Hometime Windows & Doors
Murrieta, CAFree assessment
Price Transparency
Educational Website
Good Customer Service
Services Offered
Energy-Efficient Options
Glass Doors
Window Replacement/Installation
US Window & Door - San Diego
San Diego, CAGood Customer Service
Free assessment
Educational Website
Price Transparency
Services Offered
Glass Doors
Double-Hung
Metal Frames
Triple Pane Glass
Window Replacement/Installation
Vinyl Frames
Fiberglass Frames
Custom Window Designs
Coughlin Windows & Doors Inc
Escondido, CATimely Service
Good Customer Service
Educational Website
Free assessment
Price Transparency
Services Offered
Window Replacement/Installation
Window Repair
Vinyl Frames
Energy-Efficient Options
Bay Windows
Double-Hung
Glass Doors
Best Value Glass Inc
Lakeside, CAFree assessment
Good Customer Service
Educational Website
Services Offered
Metal Frames
Glass Showers
Mirrors
Energy-Efficient Options
Glass Doors
Vinyl Frames
Window Replacement/Installation
Window Solutions
Lakeside, CAEducational Website
Price Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
JWG Windows & Doors Inc.
Poway, CAPrice Transparency
Free assessment
Good Customer Service
Services Offered
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
BM Windows
San Diego, CAGood Customer Service
Price Transparency
Educational Website
Free assessment
Services Offered
Vinyl Frames
Window Replacement/Installation
Glass Doors
Elor Energy, Inc.
San Diego, CAPrice Transparency
Free assessment
Educational Website
Good Customer Service
Timely Service
Services Offered
Window Replacement/Installation
Glass Doors
Energy-Efficient Options
American Vision Windows
San Diego, CAFree assessment
Educational Website
Good Customer Service
Price Transparency
Services Offered
Wood Frames
Glass Doors
Vinyl Frames
Energy-Efficient Options
Window Replacement/Installation
Fiberglass Frames
Double-Hung
Breeze Mobile - Door & Window Screens
Solana Beach, CATimely Service
Free assessment
Good Customer Service
Price Transparency
Educational Website
Services Offered
Wood Frames
Screen Repair
Window Repair
Glass Doors
Window Replacement/Installation
PandaWhite, Inc.
Vista, CAFree assessment
Good Customer Service
Price Transparency
Services Offered
Double-Hung
Wood Frames
Window Replacement/Installation
Energy-Efficient Options
Advanced Window
Valley Center, CAFree assessment
Educational Website
Services Offered
Energy-Efficient Options
Window Replacement/Installation
The Glass Guru
Temecula, CAFree assessment
Educational Website
Good Customer Service
Services Offered
Glass Showers
Glass Repair
Mirrors
Triple Pane Glass
Metal Frames
Glass Doors
Wood Frames
Energy-Efficient Options
Fiberglass Frames
Skylights
Window Repair
Storm/Impact Windows
Tempered Glass
Window Replacement/Installation
Custom Glass
Vinyl Frames
Screen Repair
Milgard Windows & Doors
Temecula, CAFree assessment
Timely Service
Good Customer Service
Educational Website
Services Offered
Fiberglass Frames
Energy-Efficient Options
Bay Windows
Double-Hung
Glass Doors
Window Replacement/Installation
Metal Frames
Calculate how much you can expect to pay for window installation and replacement in El Cajon, 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 El Cajon Saves You Money
When you upgrade to energy-efficient windows, you may see a few benefits, including:
- Protect your investment: When your home is on the older side, your windows could also be outdated or damaged. Keeping your windows up to date is an important part of maintaining your property and its value.
- Reduce your carbon footprint: In El Cajon, you can reduce your indirect greenhouse gas emissions by about 117 pounds per year after you upgrade to energy-efficient windows.
- Save money on energy bills: After you upgrade to energy-efficient windows, you can see a reduction in your bills by about 12% because you’ll need less energy to heat or cool your house.
- Protect your valuables: Many Energy Star certified windows have low-emissivity coatings, which not only provide better insulation for your home, but also filter out damaging UV rays, preventing your furniture, carpet and other valuables from fading.
Estimated Cost of Window Replacement in El Cajon
When researching window installation, each company offers varying services and prices. Let’s take a look at some typical costs and services.
How Much Do New Windows Cost?
The average cost to install one window is about $600 but can range anywhere from $200 to $1,200. But prices vary considerably depending on the size of your home, complexity of the installation, your location and the quality of the company you choose. Many window installers also offer door installations, which carry a higher price tag.
With windows, efficiency is one of the most important factors for many homeowners. High efficiency windows may cost more upfront, but by increasing the efficiency of your home — especially if you live in a hot climate — they can give you many years of energy savings. According to Energy Star, purchasing certified energy-efficient windows can save El Cajon homeowners $491+ each year after replacing single-pane windows.
How much your window installation costs will also vary depending on the kind of material you choose for the frames. Wood windows are generally the most expensive, though it depends on whether they are 100% wood or clad with aluminum or vinyl. Fiberglass windows also tend to be a bit more expensive than vinyl, but they are more efficient.
What Services do Window Installers Offer?
There are typically two types of window installation services: full-frame and pocket installations.
A full-frame installation is a total window replacement. It involves taking out the old window, the sill, and the exterior and interior trim. It also involves other materials, including insulation and drip edges, which increase the overall cost of the project. It’s also worth noting that it’s not uncommon for homeowners to have to touch up the paint surrounding the window after a full-frame installation. Pocket installations are simpler and won’t cost as much, as they involve merely replacing the window within its existing frame. But if the frame has any damage, you may need a full-frame installation instead.
Your window installer can 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 El Cajon
In our search to make your home improvements easier and more eco-friendly in El Cajon, the EcoWatch team chose the above companies as the best window installation companies in the city. Along with energy efficiency, we evaluated several window installers in El Cajon and ranked them based on the following methodology:
Service Area
Since this is a guide for El Cajon, we paid more attention to companies that serve the city. There are certainly reputable providers that didn’t make the list because they wouldn’t be able to serve homeowners in El Cajon.
Work Quality
When installing new windows, the quality and range of services often plays just as important of a role in insulation and performance as the brand of window you opt for. We do give window installers more points if they offer high-quality products, but we also consider workmanship as reflected in customer feedback.
Customer Reviews
Customer feedback is another super important review factor. If most customers don’t have nice things to say about their service from a certain window installation company, you won’t see it featured on EcoWatch.
Cost
This one is a give-and-take: as with most services, cheap window installation companies are not going to provide the highest quality service. On the other hand, we want to ensure we’re highlighting companies that offer a range of price and financing options so they’re accessible to most homeowners.
Warranty
As discussed, windows are a sizable investment, so you’ll want to make sure that investment is well protected. Window installation companies that offer lengthy warranties for products, parts and labor rank higher with EcoWatch.
Years of Experience
Because of El Cajon’s climate, homeowners need to be wary of water damage, low efficiency and rot. We factored in local experience to reflect the ability of El Cajon window companies to prepare homes for these issues. If a company has less than 10 years of experience, it loses points in this category.
El Cajon, CA Window Replacement FAQs
What is the average cost to install new windows in a home?
The national average cost of replacing a single window is about $600 but can range from $200 to $1,200, depending on a few different factors. The price is often influenced by the type and material of the window, the size of the window and the location of your property. Also, remember that energy-efficient windows may cost more initially but can save you a decent amount of money a year in energy bills.
Which type of window should I get?
Generally, double-pane windows will be more efficient than single-pane windows and windows that do not open will be more efficient than windows that do. If you want to be sure you’re getting the most energy-efficient windows, look for models that have the blue Energy Star certification — that means they’re certified energy-efficient by the U.S. Department of Energy.
When should I use a window installation company?
You should hire a window installation professional whenever you need to replace your windows. Installing windows is a involved process that can take a lot of time, so it’s best left to the professionals.
When is it time to replace your windows?
Windows generally last 20 to 30 years, but anytime you notice damage on your windows, it’s a good time to have an expert take a look at them to see if they are in need of a repair or replacement.
How long does it usually take to install windows?
Each window takes about 30 minutes to install based on the kind of window. However, the window installation can be a two-day job — or more — if you need to have a lot of windows installed.