Window Replacement & Installation
Energy Efficient. Beautiful. Built to Last.
- Serving the Southern California since 1989
- Free, no pressure estimates
- Expert Installers you can trust
Get New Windows & Upgrade the Way You Live
Old windows cost you comfort, money, and peace of mind. Let’s fix that.
At J.R. Door & Window, we make window replacement simple for homeowners across the Inland Empire, San Gabriel Valley, and Southern California. Our high-quality windows are designed to look great, perform efficiently, and fit your home’s unique needs. Whether you’re focused on energy savings, modern style, or long-lasting durability, our expert team guides you to the right choice and handles every step of the window installation with care and precision.
Call (909) 949-9902 Today to Schedule Your Free Estimate!
& Don't Forget to Ask About Our Financing Options
Why Replace Your Windows?
Energy-efficient glass and insulated frames help keep your home comfortable year-round, without overworking your HVAC system.
Better insulation also helps block outside noise, especially helpful on busy streets or in urban neighborhoods.
Modern locking systems and impact-resistant glass add an extra layer of protection for your home.
New windows improve curb appeal and are a smart, high-return investment if you’re planning to sell.
Today’s materials are built to hold up in the Upland climate without fading, warping, or peeling.
Our Trusted New & Replacement Window Brands
Milgard® Replacement Windows
Milgard® is one of the most trusted window brands among Southern California homeowners, known for combining long-term durability with clean, timeless design. As a West Coast manufacturer, Milgard® windows are engineered to perform well in our climate, helping homes stay comfortable while improving energy efficiency and curb appeal.
JR Door & Window installs several Milgard window lines, allowing homeowners to choose the right balance of style, performance, and budget for their home.
Why Homeowners Choose Milgard® Windows:
- Designed to perform reliably in Southern California’s climate
- Energy-efficient glass options that help improve year-round comfort
- A wide selection of styles for both traditional and modern homes
- Durable vinyl and fiberglass frames built for long-term performance
Milgard windows are backed by a full lifetime warranty, giving homeowners added peace of mind long after installation. With multiple styles, colors, and glass options available, Milgard makes it easy to upgrade both the look and comfort of your home.
Green World® Replacement Windows
Green World® vinyl windows are a practical, energy-efficient choice for homeowners looking to improve comfort without sacrificing value. Designed with durability and efficiency in mind, these windows perform well in Southern California homes where temperature control and low maintenance matter most.
Green World windows feature strong vinyl frames and insulating glass that help reduce heat transfer, improve indoor comfort, and support lower energy bills throughout the year.
Why Homeowners Choose Green World Windows:
- Durable vinyl construction designed for long-term performance
- Energy-efficient dual-pane glass options
- Clean, versatile designs that complement many home styles
- A lifetime manufacturer warranty for added confidence
Whether you are replacing a few aging windows or upgrading your entire home, Green World windows offer a reliable solution that balances performance, appearance, and affordability. Installed by the experienced team at JR Door & Window, these windows provide lasting comfort and value.
Choose From a Range of Window Styles
No matter what style or size your home is, we have windows that fit beautifully. Our Single-hung and double-hung windows bring a classic look with smooth operation and great ventilation. Sliding windows glide open with ease and create a clean, modern appearance that works well for wider wall openings. If you want fresh air and open views, casement windows swing outward to let in plenty of light and breeze. Awning windows are hinged at the top and are perfect for smaller areas or for keeping air flowing even during light rain. To brighten your home and capture the outdoors, picture windows offer wide, unobstructed views and let in natural light. And for homeowners who want to add character and dimension, bay and bow windows greatly extend outward, bringing in sunlight while enhancing your home’s design.
If you’re unsure which window style is right for you, that’s where we come in. Our team will take the time to understand your home, your goals, and your budget before helping you choose the best option during your free consultation.
Why Homeowners Choose J. R. Door & Window
Local. Trusted. No Gimmicks. Just Great Service.
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35+ Years of Local Experience
We’ve helped thousands of Inland Empire homeowners improve their homes since 1989.
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No High-Pressure Sales
We don’t talk over you, upsell what you don’t need, or leave you guessing. Ever.
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Top Window Products
We only install windows we know will stand up to years of use and perform in Southern California's climate.
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Clean, Professional Installation
Our crew respects your time, your home, and your schedule. We show up on time and clean up completely.
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Highly Rated by Homeowners
We’re proud of our reputation. Our reviews reflect how much we care about every customer.
Take The First Step Toward New Windows
Call or click below to schedule your free in-home estimate.
or Call Us Today!
(909) 949-9902Frequently Asked Questions
How do I know if I need new windows?
Drafts, noise, condensation between panes, and frames that are hard to open or close are all signs your windows might need to be replaced.
How long does it take to install windows?
Most projects are done in one to two days. Larger homes or complex installs may take slightly longer, but we’ll give you a clear timeline in advance.
Do you charge for quotes?
No — our in-home estimates are 100% free. No pressure, no obligation.
What areas do you serve?
We proudly install windows throughout Upland, Rancho Cucamonga, Claremont, Ontario, and other nearby communities.