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Windows 4U

For Your Home. For Your Comfort. For You.

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Our Projects

Free estimates

We provide a free price estimate for your project with no hidden fees

competitive prices​

Our prices are fair and fit your budget without cutting quality

lifetime warranty

Our products come with a lifetime warranty for your peace of mind

simple process

We take care of everything to make your project smooth and easy

WHAT ARE WE GOOD AT ?

House windows

WINDOWS INSTALLATION & REPLACEMENT

Improve your home's energy use and appearance with our window installation and replacement services. Find the style and material that works for you.
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Entry door

entry door installation & replacement

Upgrade your entryway with high-quality doors that offer security, durability, and style. Our professional installation ensures a perfect fit and long-lasting performance.
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sliding glass

SLIDING/PATIO DOOR INSTALLATION & REPLACEMENT

Transform your indoor-outdoor living space with sleek, modern sliding or patio doors. Enjoy smooth operation, enhanced views, and improved functionality tailored to your home.
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Schedule a free estimate!

Get expert advice and a detailed free quote for your windows or doors—no obligation, no hassle!

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HOW IT WORKS ?

Schedule Your Free In Home Estimate

Call or text us at 925-393-3578 to schedule a date and time for a free in-home estimate that works best for you.

What To Expect During Your Consultation

During your consultation, our Professional Sales Representative will take measurements, show samples, advise you on material options, and discuss your window or door installation needs. Afterward, you’ll receive your quote.

Reliable Lead Time

We will order your windows as soon as you review and approve the contract. Upon delivery to our warehouse, quality controlled inspections are employed and we will contact you to arrange an installation date.

Installation Completion

Upon completion, our certified installers will ensure you’re completely satisfied with the installation and inspect each window/door for proper operation, fit and finish.

What Our Dear Clients Say About Us:

Had a great experience with Windows4U! The team was quick, professional, and the windows look fantastic. The whole process was smooth, and the quality really shows. Would definitely recommend!‏
Leon Nunez Duarte
I recently had windows installed by Windows4U, and I couldn’t be happier with the experience from start to finish. From the initial consultation to the final installation, everything went smoothly, and the results are incredible. Fantastic customer service, too!‏
Sara Sugimoto
I had an awesome time with them installing a few windows and a sliding door in my house. Their prices were super reasonable. They use top-notch windows and have the best customer service ever. Thanks a bunch!‏
Sepehr Chapsang
Leonid was on time and more importantly gave me an honest assessment of the condition of my windows. It is rare to find an honest contractor that will tell you if replacing windows will fix the problem. He and his brother were extremely knowledgeable and polite. If I need my windows replaced in the future I will definitely hire Windows4u.
Yolanda B.
Thank you Leon and team for a great job with our doors and windows. We appreciate your advice and expertise. Sadi.
Sadi A.
I got my windows installed by Leon and from start to finish the professionally and preciseness was amazing. He was able to answer all of my questions because I had no idea where to start. Very happy with my choice in working with them, definitely recommend!
Tanaz E.
I highly recommend Windows4U for window and door installation. Their team was knowledgeable, courteous, and completed the job with precision. Great customer service aswell and great price!
Avihai M.
We replaced all of our windows with Alex and the team and we are very happy with the price, quality, and service. The installers were great and super professional. We will definitely use them again in the future and if you're reading this, I would not hesitate to work with them. They only use quality windows and do great installations with excellent customer service.
Eric G.
I rarely write reviews however I am glad to write this one for Leon and his team. They were uber professional all along, always on time with estimates, arrival of material, installation, etc. Excellent communication. Installation was clean and the crew was also very professional and on schedule. Price was highly competitive, too. Strong recommend!
Rodolfo M.
These guys provided a great service for our family's house. We were very happy with the results of the window installation, and will definitely keep Windows4U as our go to company. They were easy to work with and the price for value they provided was very competitive. Overall satisfied with the experience and will continue to use them in the future.
Gio D.
Windows4U is great company! They sell high-quality windows and doors for an affordable price! I was really impressed with the customer services and the way how the whole process was handled from the day one. I am recommending to all my family friends to go with Windows 4U!
Anna K.
I have replaced window and door for my first house and I'm so impressed with quality and services, all window looks amazing with affordable price, highly recommended.
Sitanan S.
Alex has been extremely helpful!! He explained everything up front and delivered on all his promises in a timely fashion. Highly recommend.
Yisroel
Great service they, responded quickly and scheduled a time by my availability explained the different options and was friendly all through the process
Daniel G.

Let's Get To Know Better

We’re a family-owned business in the Bay Area, specializing in expert window and door installations. With years of experience, we’re committed to making homes more beautiful, energy-efficient, and secure. Our team is passionate about quality craftsmanship and excellent service, ensuring every project is done right the first time.

Why Choose Us for Window Installation in East Bay?

 

  • Local experts who understand your needs.
  • High-quality, energy-efficient products.
  • Dedicated to clean, reliable, and timely installations.
  • Competitive pricing that provides great value for your investment without compromising on quality.
More About Us

FAQ

ask us
anything

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.

 

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.

 

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.

Get a free quote

Ready to upgrade your windows and doors? Let us know what you’re looking for. Fill out the form below to get started!

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Visit us

Willowick business park, 1130 Burnett Ave Suite # N,
Concord, CA 94520

Email Us

windows4ual@gmail.com

Call/Text Us

925-393-3578