We live in a Victorian and had 6 windows replaced all on the second story. They sent one person to replace all the windows he worked from 8A until 7P.He did the best he could but caulking left a lot to be desired. Very disappointed in XOTEK that they didn't know more people were needed to work this project. Also most people who have written reviews say they have wonderful customer service...they never checked on the worker and never checked with us after the installation that is the least they could do. read more

Excellent !! Customer service beyond expectations, Craftsmanship quite exceptional. From beginning of window project to completion ,a professionalism that I would highly recommend ! From the office to the field Great all around team ! read more

Did a great job installing my new windows and screens, including an oddly sized screen door. Showed up early and got the work done quickly, set out tarps so they weren't dirtying up my floor, and checked in with me to make sure everything was all right. When I pointed out a bit of caulk that had gotten onto a window, they fixed it immediately with no complaints. Maggie also was a real help when I was first figuring out the whole window-replacement thing, and saved me from a huge headache with my HOA with her advice. I would highly recommend! read more

From the initial presentation, to the explanation of the process, to the quality of the product, timeliness of job, the appearance of the product & the reasonableness of price , XOtek did an outstanding job & we can highly recommend. read more

These guys installed vinyl windows on my house 13 years ago. Great job, great windows! One of the windows leaked this winter and I called them. I told them I wasn't expecting warranty coverage, just wanted the leak fixed. They came out, caulked the window, and wouldn't take any money. I thought the company was top of the line 13 years ago and I have not changed my opinion. read more

XOtek is an excellent company in terms of service, communication, prices, installation and quality of product. What a lucky fine for my wife and I who needed a new outside sliding glass door and replacement window. We really like the end result. Maggie, Tony and Ghanna are the best in addressing our needs within our budgeti and guiding us thru the whole process. Simply, one of the best businesses around who handle door & window products. read more

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! read more

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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! read more

XOtek - a view of a patio through a sliding glass door - Windows Installation Near Me - Castro Valley, California

after 1 year, window seal cracked.... after 2 years, window starts leaking..... I called and no call back.... read more

I highly recommend XOtek. During the in-home consultation, Tony made some very good suggestions not thought of and although he had other suggested design ideas we didn't go with, It was good to have more information to make our own decision on things. We went with the Amerimax brand and are completely happy with this choice for many of the reasons told to us. The 23 windows ordered were made in 3 weeks time and installation took only 2 days! Since we retrofitted them into our existing frames, installation was cost effective and expedient. Their price was VERY competitive from the few companies I had come in to quote on this project. Being in Castro Valley myself, I wanted to support local, in town businesses where I can, so this was part of the decision point as well. Give them a try! read more

XOtek - a man on a ladder painting a window - Windows Installation Near Me - Castro Valley, California

When you need to get it done right the first time, you hire XOtek. Recently, I got a new house and I hired Tony to upgrade my windows, and he did an awesome job. It was not only the work that made me really happy but his patience and attitude while he was doing the job was what amazed me. I am referring XOtek to close friends when ever they have to get their windows done, because i could trust them by getting the job done right. But I didn't think that was enough so I'm writing this review on yelp. What's was also nice was that Tony stood by his work, when something needed attention or needed tweaking he was always there and cautious about it. That's why XOtek comes with my highest endorsement. One of the things that comes to mind with XOtek is that "you get what you pay for," and if you want it done timely, on budget and right...hire XOtek!! read more

They sell windows only and work with windows everyday, so you would think the work would be good. but NO its over priced! I had them do almost all my windows just recently and the work is average for a window company. The lady in the office is not very nice and not professional at assisting us. We had some concerns after the work, and she seemed impatient dealing with us and answering our questions. Different houses have different structures and material, but they only care about installing their product and nothing else. I recommend you to look for someone who cares a little more. I am a real customer who worked with them. I hope the business owner will not request to remove my review again just because my experience was unpleasant. read more

Both XOTec and ABC Windows and more were the top two windows installers according to Checkbook, so I contacted them both. The person from XOTec came first to me and gave me a very detailed presentation about the different types of windows and what I needed to know. They then gave me an incredible estimate very quickly, and even threw in metal screens at no extra charge. The person from ABC Windows and more came next, and spent a bit less time with me, and took longer to give me an estimate, and the estimate itself was over 50% more then XOTec. I went with XOTec and they did a really great job. I am so happy I chose them. read more

Tony come out and give me an estimate to replace my very old windows. I was taken aback that I got such a fantastic quote. I had anticipated about double the price. Tony explained thoroughly the process involved so I had no further questions to ask. Everything was upfront, no hidden fees, etc. They set up the installation promptly as soon as the windows were made. To say I am extremely pleased is even an understatement. It was such a relief to see the masterful workmanship that went into getting the window installation. They made it look easy which I knew wasn't the case. They started promptly and finished up within the estimated time frame I was told. They worked efficiently and professionally. I did notice that on a few windows that I had closing the blinds and they will be coming back right after the Thanksgiving holiday to fix that situation which is also a relief that they were so accommodating so I can't even list that as a flaw. It's so nice having my beautiful windows and not to feel the breeze that was seeping in on my old windows. I'm sure I'll notice a difference in my PG&E bill soon too. Obviously, I am a very pleased customer. Do not hesitate to call them if you need new windows as you will not be disappointed. read more

I was very happy with the service at XOtek window . we wanted to get the new windows & door installation done pretty quickly before rain season begins. Maggie was a very friendly sales person; She did the measurements,explained the window options,then showed us through the showroom where we made our choices the next day. The installes were scheduled,they came exactly on time and everything was done within a day without any complication. They certainly deserve their high Yelp rating! read more

We used XOtek back in 1997(!) and 24 years later the windows are still in good shape installation wise. The glass however is fogging up and not insulating well any more. Called XOtec today to acquire about the Lifetime Warranty. Maggie called me back right away, but unfortunately my manufacturer (Sunview) is out of business. Maggie was very helpful and recommended to explore options on replacing the glass rather than the whole window. Thanks! read more

I can't comment on their workmanship since after trying to get an estimate 3 times I have not heard from them. I contacted them through their contact page on their website twice with no response and called the phone number I was provided through an answer here on Yelp. Again no response. I have no idea why they would turn down thousands of dollars worth of work. read more

Just had 29 (yes, twenty nine) windows replaced in my house including an 8x10 & several odd shaped windows 6 feet up on the walls and couldn't be happier! The Ameri-max window quality is impressive & the installers were top notch! They went the extra miles in making sure we had the correct windows for our situation and went above and beyond repairing dry rot & correcting errors the builder made 30 years ago so our house wouldn't rot around our new windows. We also appreciated the low key sales and the extra time spent showing us products so we could choose what was best for our house. I highly recommend Xotek windows! read more

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

We had a bunch of wood windows in our 1930's house that we're rotting through the wood in the sashes. So we went to XOtek and Maggie very patiently explained how the different types of windows worked, finish options, trims, etc. and gave us pricing options in a way that we could buy all or part of the windows we selected. They had a carpenter come over to inspect and measure our existing sills and jambs and determined that they were still in good condition, saving us the cost of replacing them. The windows came in on time and the crew came to our house on time, and replaced 4 single hung windows and a big picture window in half a day, quietly, efficiently, and professionally. We'll use them when we need to replace our next batch of windows. read more

This company sells a superior vinyl window which was demonstrated during the consultation. The price is better than the companies that you see advertising all the time, plus the ratings of customer satisfaction are way better. I had no idea that newer double-paned windows blocked 94% of heat transmission compared with 20% of our old windows. read more

This is a review only of their customer service. While we have not made a purchase with this company, we did contact them to get a quote for a new sliding glass door and a kitchen window. Tony came to our house on time, was friendly, and let us know we were approaching our project from the wrong angle. Tony gave us some really helpful information about reasonable prices and helpful details regarding permits. He put us in touch with the office manager Maggie, who gave me a referral for a general contractor. I really appreciate feeling so respected and for being provided with some helpful education. read more

Had 4 windows in my apartment replaced for energy saving. I wasn't going to do it at first but in the end I'm saving quite a bit on my bills now, so I'm really pleased. And XOtek did an awesome job from consulting, picking designs, and giving me a good range of options. Really easy to deal with , great guys and service. Totally painless and I got exactly what I wanted. XOtek doesn't have the yelp following I'd expected, they deserve more reviews. KEep up the good work guys! read more

i'm not usually one to write reviews, however, these guys are so good I feel compelled to but finger to keyboard. My cousin and I are new home owners and new windows came to the top of the list of projects. After getting a couple of quotes from different companies we still weren't settled on a contractor and so we asked around for the Windows Specialists. Every interaction with them was great, from the first appointment to the installation. Tony especially shines with his attention to detail, conscientious attitude, and follow through. We had 8 windows and a large patio door all installed in one day and you wouldn't have known the crew was ever in the house. If you're thinking to get new windows give these guys a call and you won't be sorry. read more

I had all my windows replaced by them recently. Excellent product and very professional service. The cost was also less than the other quotes I received from other vendors. Installation was done on time and the new windows are excellent. The only quibble I have is that many of my calls were not answered. But once I got a hold of Maggie, things proceeded smoothly. I would definitely recommend them. read more

I should have mentioned Maggie too -- my wife and I got a lot out of her demo of the various windows brands and styles at the Castro Valley showroom. My wife especially appreciated Maggie's patience in answering our many detailed questions. read more

The company met their contractual obligations. However, I did not like their quality of work . The work was not done properly on the initial installation. 2 additional visits were required to even make the patio door work properly. The stucco around the patio door is now thicker than the door. I found it frustrating communicating with the owner and employees except for the office manager. read more

I was so impressed with my experience with XOtek. Their prices were very competitive. Top notch service, very knowledgable . Installation was fast, but of high quality. Do not look anywhere else, this is the place to get your windows!! read more

We just had all of the windows our home replaced. I was very please with how quick they were to install them and how clean they kept the work area. We had sliding doors replaced with windows and a window replace with french doors. We had 12 windows replaced total, 4 of them being extremely large. They completed the work in less than a day and a half. They did a wonderful job, I couldn't be happier. read more

Xotec replaced every window in our house. We received a number of quotes and they were the cheapest by a considerable amount. As far as we can tell the quality of the windows is just as good as anything else on the market. It took four weeks for the windows to be manufactured, which was the expected time. They were able to do the installation on a weekend, and installed them all in a few hours with only two people. The guys who did the installation were very friendly, quick, and clean. read more

This is really for those of you who are shopping around for windows. We recently got our new windows in our townhouse by XOtek. These people are no fuss and get the job done with a reasonable price. We have been shafted before by other people. XOtek are HONEST people; they stand by their word; AND get the job done. They respect your house, time, and the money you are spending - especially in this recession. Sam, Gana, and Meggie were so very nice. So, if you don't want to waste your time and think that your time is more valuable than anything else....just hire these guys and get yourself some nice, good quality, new windows. read more

I had a very disappointing experience with XOTek, in a couple of areas. First of all, it took twice as long to have my windows manufactured than what I was told to expect. Which I do not hold XOTek responsible for, of course -- but they didn't bother to let me know at all. I finally called when I hadn't heard from them in a month, and found that they KNEW that my windows were going to be three weeks late, but didn't think to inform ME. I was waiting for an installation date so that I could schedule other work -- painting, for example -- immediately afterwards, so not knowing when it would happen was inconvenient to me, THE CUSTOMER. But they didn't bother to call and let me know there would be a delay of three full weeks. When it came time for installation, they sent a crew of two, only one of whom actually did much work, while the other mostly cleaned up and carried things. They scheduled one day for the job, which was not enough time. The crew of two was here for almost 12 hours. And they did a sloppy, sloppy job. Not only was there trash all over my yard -- including screws and a utility knife blade on my driveway, chunks of metal, wood and vinyl on my lawn and cigarette butts in my flower beds, pieces of trim everywhere -- but, more importantly, the finish work on the inside was horrible. They used MASSIVE amounts of caulking, slopping it everywhere. There were visible fingerprints in the caulking, globs of it on cabinets and walls near the window. It was sloppy, unprofessional and ugly. I called the next day to complain, and they sent the same guy back to fix it. He clearly didn't really see what I had a problem with, but did the caulking again, and it was BETTER, but still not good. I called again, left a message saying I was still not happy, and surprised that they apparently couldn't do the job properly, and didn't even get a call back. I honestly don't think they cared, and I don't think that the guy who did the work COULD do any better. Just unprofessional. Also, there was a defective clip on one window that makes it partially unusable. The installer said that a new one would be ordered and he'd bring it by and put it in. It is now almost a month since the install, and no word from XOTek, or sign of this clip, so clearly I am going to have to be the squeaky wheel again. That said, I think they did a good job with the window installation...but the finish work, and the respect for making our house look as good when the work was done as it did before they started, and the overall customer service, was sorely lacking. I would never recommend XOTek, and certainly will never use them again. read more

Recently had a sliding glass door replaced. Maggie and Sam are very knowledgeable about their products, are very personable and easy to deal with, and the communication was good. Sam oversaw the project with his employee who was very thorough and meticulous with his work. It took 8 hours to install the door, which included replacing the outside trim and the inside trim (I had no inside trim previously). Very pleased with the service, product and installation. Loving my new door!!! Thanks Sam, Maggie and Gana! read more

This review is only for the free estimate. Tony was on time for our appointment which I liked. He seemed very knowledgeable about his windows and it was nice that he showed me the differences between each window manufacturer. He even took out a heat lamp to show me how the new windows performed compared to older windows. Although I went with another company their pricing was very competitive. read more

I have been going in every year for probably 4 years looking at new French doors. Each time Maggie spent the time with me and answered all my questions and gave me ballpark prices. FINALLY we purchased French doors and are very happy with the sales/installation!! Thank you ! read more

Tony Kim, head of XOtek, came to our house yesterday to give us a quote on some windows we need to replace. From the beginning of his visit, he didn't seem to be paying attention to what we wanted. We want casement windows and he said they were out of fashion. It went down from there, in my opinion. When he had seen the windows and we were talking about details, we said we wanted the windows to come ready to paint, he said we should go with the factory painting. I said I was going to paint them. At this point, Mr. Kim said to me, "You??? YOU??? You can't do that. It's too difficult." He went on about how he never paints, because it's too difficult. He seemed to think that, because I need trekking poles for stability for walking, that I would be incapable of painting. I have painted most of the area that was remodeled 20+ years ago. I am good at painting, not that those details have any bearing in the matter. I could be completely incompetent and his derision would still be out of line. I interrupted his comments a few times, saying, "Excuse me," and "That [comment] is out of line." He did stumble out an apology of sorts. And as he was leaving, her tried to apologize again, saying, "You know I didn't mean to offend you." No, I DON'T know that, and I resent having words put in my mouth. XOtek will NOT be getting our business. He could give it away, and we still wouldn't take it. It was an example of how NOT to treat potential customers. I don't want anyone else to be treated like this. read more

XOtek did such a great job on my new sliding glass door (with dog door IN the slider), that I am now getting an estimate to have all of my windows done in the entire house. I appreciated their schedule, on time, competitive rates, professionalism and kept the work areas clean. When they left my house, you could not tell that they had been here to replace an entire door. read more

We first chose XOtek to install two windows in our kitchen - one included a bay window overlooking our view of the bay. The window has made such a difference in our kitchen and we love sitting there looking out at the view. It not only makes the room look larger, but the view is so much more expanded from the flat window that was there before. Their cost estimate on this project was very good. We were so impressed with their work from start to finish - they arrived when they said they would, prepared the house so that no damage would be done to the floors or carpets, installed the windows in a quick and efficient manner, and did a great job cleaning up. We were very happy with their work. Judging from our experience with them on this project, we decided that we wanted XOtek to do the work to replace all the remaining windows and doors in our house - a total of 12 windows and 3 sliding doors. The project is now complete and we could not be happier. I would, without question, recommend them to anyone. You will not regret it. read more

XOTek did an outstanding job in installing my replacement windows. They performed with excellence in all phases of the project from the initial sales presentation to the final completion of the installation, including follow-up. The sales presentation was very thorough and provided me with an excellent understanding of the details of replacement windows, so that I was able to better understand what to look for as I was doing my research, etc. He encouraged me to get multiple quotes so that I would be more knowledgeable about the window replacement availabilities and companies, and be able to make a more informed decision. The office administrative staff was very knowledgeable and friendly. The installation crew was very thorough and meticulous in doing the job. Three different persons came out to measure the windows on three separate occasions. The person who did the installation was a marvel to observe. He was very detailed conscious and very persistent to insure that the work was exactly as he wanted it. The crew cleaned up the work area, so that when they were gone, it was very clean without any residual mess. There was one minor flaw in the window mechanism, and they came out immediately to correct the issue. The windows are great - the replacement windows are made by Amerimax Building Products, Inc. After doing my research, I believe that they are the best you can find in my area. I give XOTek a full 5 star rating without any reservations. I fully recommend XOTek to anyone who is looking for someone to replace the windows in their home. read more