Bay Area Windows and doors Replacement & installation Professionals
At Windows4U, we deliver exceptional window and door solutions throughout the Bay Area.
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A Trusted Name in Window & Door Replacement Across the Bay Area
For over 15 years, Windows 4U has helped homeowners upgrade their homes with high quality window and door installations designed to last.
We focus on clean work, honest recommendations, and professional results, the kind that make a real difference you can see and feel every day.
- Over 2000 completed projects
- Experienced in house installation crew
- Licensed & insured professionals
- Trusted by local homeowners
Our Services
A Beautiful, energy efficient home starts here
Window Replacement & Installation
We specialize in window replacement projects designed to improve the comfort, appearance, and performance of your home.
Our team handles both retrofit installations and full-frame replacements, depending on what best fits your home’s structure and condition. Every window is carefully measured, professionally installed, and properly sealed for a clean, long-lasting result.
From single-room upgrades to full-home transformations, we focus on precision, durability, and a finished look that feels like it was always part of the home.
Patio & Sliding Door Installation
Enhance the openness and functionality of your living space with professionally installed patio and sliding doors. We install smooth-operating, secure, and visually modern systems that bring in more natural light and create a seamless connection between indoor and outdoor areas.
Each installation is handled with precision to ensure proper alignment, insulation, and long-term durability.
Entry Door Replacement & Installation
Your entry door is one of the first things people notice about your home. We install high-quality entry doors that improve curb appeal, security, and insulation while giving your home a more refined and updated look.
From classic designs to modern styles, every installation is completed with attention to detail and structural integrity.
New Construction Projects
We work with homeowners and builders on new construction projects, providing professional installation of windows and doors from the early stages of the build.
Our team ensures accurate placement, proper sealing, and clean integration with the structure, helping set the foundation for long term performance and efficiency.
Get a Window Estimate Without an In-Home Visit
Busy schedule? Prefer fewer in-home appointments? We offer remote estimates to make the process easier. By sending us basic window measurements and photos, we can provide a clear price range before scheduling any visit. This helps homeowners in the Bay Area move forward faster, with more confidence and less disruption.
Why Choose Windows4U for your project?
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Hear it from our customers
See what homeowners across the Bay Area are saying about their experience with us
Real Home Transformations
Drag to see how new windows and doors can completely transform a home's look, comfort, and feel.
Our Simple Window Replacement Process
Get Your Free Estimate
Fill in our FREE ESTIMATE form or call us at
(925) 393-3578 for a fast remote estimate, or request an on-site visit if needed. We’ll give you clear pricing and options.
Measurements & Product Selection
Once you’re ready to move forward, we confirm measurements and help you choose the right window or door style for your home. We’ll make sure everything fits, performs well, and matches your project goals.
Professional Installation
Our licensed, insured in-house installers handle the job from start to finish (CA Lic #1097508). We focus on clean workmanship, proper sealing, and respectful work around your home.
Final Walkthrough & Clean Finish
After installation, we inspect the work, verify smooth operation, and clean the area. You’ll get a final walkthrough so you feel confident everything is done right.
Ready to upgrade your home?
A simple upgrade that makes a noticeable difference every day.
Fill in the form to get your quote today →
Windows & doors that are Built for Strength and Long Term Performance
High quality modern window systems designed for durability, stability, and lasting protection for your home.
Improved Energy Efficiency Year Round
Better insulation in both summer and winter, helping maintain indoor comfort and reduce energy loss.
More Comfort and Less Outside Noise
Reduce drafts, limit outside noise, and enjoy a more controlled and peaceful indoor environment from day one.
15+ Years of Industry Experience
Installed by professionals who specialize in windows and doors, delivering clean, precise results built to last.
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We are here 4 you!
Meet the team behind windows4U
Windows4U is founded and led by Alex and Leon, two passionate brothers with 20+ years of hands on experience in window and door installation, working hands-on in all kinds of installs, from simple retrofits to full new construction jobs.
Windows4U is built around the experience homeowners actually want: direct communication, consistent quality, and a smooth process with no unnecessary back and forth.
We run a focused team with high standards and take full responsibility for every project, from the first estimate to the final clean finish.
If you’re looking for experienced installers, a straightforward process, and results that hold up long-term, you’ll feel right at home with us.
FAQ
ask us
anything
Is there a minimum order for window or door installations?
No, there is no minimum order! Whether you need just one window replaced or a full house installation, we’re happy to help with projects of any size.
Do you replace broken glass in existing windows?
No, we do not replace broken glass in existing windows. We specialize in the installation of new windows and doors to ensure the highest quality and energy efficiency for your home.
Do you offer a warranty?
Yes! We provide a lifetime warranty on the products we install and a 4-year warranty on our installation services, giving you peace of mind with your investment.