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    XOtek

    4.3 (38 reviews)
    Closed 10:00 am - 5:00 pm

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    Response time

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    Response rate

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    Services - XOtek

    Window installation

    Window replacement

    New window installation

    1 More Service

    Window replacement services

    XOtek Photos

    Recommended Reviews - XOtek

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    Reviews With Photos

    a garage with a lot of windows

    We are beyond pleased with our new windows from XOTech. They were recommended to us by a relative in Castro Valley and did not disappoint in the least. Tony came out for a consultation and not only gave us a quote but also educated us on how different window brands worked. He was HONEST, knowledgeable, and diligent. He even made design and placement suggestions we hadn't even thought of. His follow-through and professionalism are exceptional, and the same applies to Meggie, the office manager, and Gana, their contractor. At every step of the process, I was updated by either Tony or Meggie, who called and promptly scheduled me for measurements and installation. We had 4 windows and 2 large sliding doors replaced, and Gana and his son did them all in several hours. They were very organized, efficient, and incredibly clean, laying down drop-cloths throughout the house and tidying up the whole time -- they left it cleaner than when they arrived. Such attention to detail, and the new doors came with a pretty trim (already primed!) which we didn't even have before. We were impressed and thoroughly satisfied with the entire XOTek team, from customer service to craftsmanship. And their prices are VERY competitive. Other companies we consulted charged double with a much slower manufacturing time. We bought AmeriMax and, compared to our previous 50yo windows, the difference is night-and-day -- proper insulation and double-panes (long overdue). For their outstanding work and attentive service, we HIGHLY recommend XOTek. So happy with our new windows!

    a view of a patio through a sliding glass door
    Liliana I.

    I couldn't have made a better decision for replacement windows and sliding doors! I quoted a good number of companies before choosing to go with XOtek. Tony was very professional and took his time to share what he knew and answer my questions. He also showed me two different types of windows to compare. I went with Amerimax Windows due to the quality and great ratings. I also decided on XOtek because of their excellent reputation, are a local company, and after doing tons of research, I found that the installation is as equally important if not more than the windows themselves. The price was very reasonable and lower than I expected. I was told the windows would arrive in about 4 weeks and they arrived exactly on time ( I actually expected delays and was surprised that they arrived exactly when I was told they would). Got a call that the windows were in on a Wednesday and they were able to come and install them over the next day and a half! As far as installation, the team took their COVID precautions and did a beautiful job, taking care of surrounding areas. I've already recommended them to neighbors who asked about the windows. I will definitely go with XOtek again for any window replacement needs and recommend you do as well!

    a man on a ladder painting a window

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    5 years ago

    Great service, easy to schedule, no sales pressure but offered great design advice. Highly recommend!

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    10 years ago

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    Ask the Community - XOtek

    Do you work on mobile homes?

    Yes. If you would like to get an estimate, please give me a call to set up an appointment for… Read more

    Are you willing to work with customers who want to pull permits? We have had difficulty finding someone who will do this for us.

    Of course, we do work permitted jobs at regular basis.

    Don’t See Your Question? Ask Away!

    Review Highlights - XOtek

    Maggie was very helpful and recommended to explore options on replacing the glass rather than the whole window.

    Mentioned in 10 reviews

    Read more highlights

    Cal Coast Window & Door

    Cal Coast Window & Door

    (391 reviews)

    From start to finish my experience with Cal Coast getting retrofit windows was fantastic!…read more Sal was the first to come out to give the initial quote and product options, he was very personable and great to work with. Sal was able to help with good pricing to meet my budget needs. Gary then came next to do final measurements before ordering; this was pretty quick work and he was very thorough. Once the Windows were built and ready to be installed, the installation manager Lorna was very quick to schedule an installation date and accommodated my scheduling requests. On the installation day, Juanito and Mauricio arrived on time, worked very efficiently and professionally, and did exceptional installation work. I would highly recommend Cal Coast to anyone looking for new windows!

    I can't say enough good things about this company. From start to finish, everything was handled…read moreprofessionally and exactly as promised. Their pricing was fair and transparent--no surprises, no upselling, just honest numbers that made sense. What really stood out was their timeline. They showed up when they said they would, stayed on schedule, and completed the project right on time. That alone is rare these days. The installers were top-notch--respectful, clean, and clearly took pride in their work. They treated our property like it was their own, which made the whole experience stress-free. If you're looking for a company that delivers on price, timing, and professionalism, this is it. Highly recommend!

    Custom Exteriors - Infinity from Marvin windows and patio door

    Custom Exteriors

    (376 reviews)

    We had all our windows replaced with Anlin Delmar dual pane windows from Custom Exteriors 14 years…read more(2012) ago. Never knew about life time warranty until last month, one of the window cracked. We didn't have any receipt or anything, just an email we did 14 years ago. We just contacted the company on their website and amazingly, they have the record by the address. The service department was so helpful, they contacted us and contacted the manufacturer to set up appointment with the case number to get it replaced. The windows were replaced 14 years ago in one day and we had many custom sized windows. The amazing thing is they know exactly which window that cracked by us describing the location of the window. Anlin Delmar (Milgard) called us and setup the appointment. They came and replaced the windows in a few hours. It was amazing and we're extremely happy. Now we know, go with the best and reputable company like Custom Exteriors and a good manufacturer like Anlin Delmar to have after service years after the work is done. Would we recommend Custom Exteriors and Anlin Delmar? The answer is obvious, YES.

    ONE CORRECTION THE QUOTE TO INSTALL THE INDOOR TRIMS WAS 3 THOUSAND NOT 5 THOUSAND. For the rest…read morepictures do not lie. Kevin did call to follow up. He did offer to send someone to fix the mess his company left behind. Unfortunately, his crew left stained finger prints in the wood in addition to staining the windows in a totally different stain shade than the one I requested. As I have no confidence in his company's abilities, he offered to cover the cost. I DECLINED HIS OFFER. This company knew all along what was happening in my home. I sent pictures, I begged for a REASONABLE detailed quote, I was willing to pay extra for something that should have been included in my quote. NO RESPONSE NO RESOLUTION. Until this review this company did not care. I keep the 1 star review and my integrity as I cannot reconcile all the 5 stars with the horrific work and customer service I received.

    Window Replacement Center

    Window Replacement Center

    (83 reviews)

    Parkside

    I remodeled my house in 2009 and had Marvin Windows installed at the back of the house, however I…read moredid not replace the windows in the front of the house as they were newer. In 2025, we decided to replace all the windows and the front door in the front of the house and wanted Marvin windows to match the front of the house. There are many window replacement companies out there that will build and install windows for you. However, we specifically wanted Marvin windows and we wanted to upgrade to the higher end Marvin windows as we had installed them in the back. Mark (the estimator) was very responsive and came out to measure and give us an estimate. We signed the contract and he said that we could expect installation in 3 months. Well, 3 months came and went and it seems our custom made windows from Marvin had some manufacturing issue and were delayed. Ok, so instead of a September installation, we were now we are expecting a December installation. It wasn't a big deal except that I had to restore my living room for Thanksgiving. This delay wasn't Window replacement Center issue, it was an issue with the Marvin manufacturing process. So, why am I giving a 5 star review. The installation was great. Oleg (sp?) was the lead installer and he did a wonderful job. My husband (a real DYI person and a perfectionist) even said that the workmanship was perfect. See attached pictures. They were here multiple days and left the rooms cleaner than when they started. Not a speck of dirt or dust was left. So, they only do new window replacement/installation. Meaning if you want a window where a wall exist, they don't do that. They don't fix existing windows (broken glass, old hardware). Mark did walk my husband through how to get a replacement part on another window were the hardware was rusted. They also don't do painting. You need to either paint it yourself on the inside or hire a painter to do this. Also, most of the installers speak very little English. We didn't find that to be an issue. If I had a question that they couldn't answer, they called Mark right away and we were able to work it out. The installers all came on time and there was even a day that I said they had to be done by 5 as we had a dinner engagement and they left when I wanted. Overall, this was a really good experience and I would hire them again to install any windows.

    Amazing service and quality windows! Mark and the team were extremely professional. They had a…read moregreat price for replacing all the 65+ year old single-pane windows in my house. The team was fast and extremely efficient. The windows look great and an extreme improvement in blocking out sound and insulation.

    XOtek - windowsinstallation - Updated May 2026

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