Amazing service and great pricing. I would recommend to everyone looking for replacing their…read morewindows. The entire transaction and installation process was perfect, and I have zero complaints. Michal was fantastic -- he even followed up afterward with an email containing the link to register my windows. You can tell he genuinely cares about his clients and his service. I have no doubt that if I have any questions or concerns, I can email him and get a response right away.

Great job. Michal was very responsible and professional. He even came twice to do the accurate…read moremeasurement before placing the order just in case any accident. The installation was also efficient and clean, nothing around got damaged. Finish was perfect. Everything was moving on as schedule, no back and forth, free of mind.

We just had our patio door glass replaced by Maz Glass in our Danville home. We had a great…read moreexperience with their service and people. The crew arrived right on time and was incredibly professional throughout the process. A huge shoutout to Efran, Miguel, NJ, and the rest of the team for the excellent and quality work. If you need to replace or install windows and doors in the SF East Bay, we highly recommend contacting NJ at Maz Glass. He ensures the job is done right at a very fair price!

They came out quickly (within 1.5 hr), cleared out a broken patio door, all the glass shards, etc…read more Removed the door frame, brought it back to their shop, and was back in 3 hr installing it. Not the cheapest, but a fair price and the only shop that could do it that day. Everyone else quoted several days to order glass, etc.

Don't bother with this guy. Came out to give us a quote on 2/2, said will have a quote to us by end…read moreof the week 2/6. Texted him on 2/10, no rely. Called him on 2/13, said he will get us the quote that day. Heard nothing from him and tried calling again on 2/20, that's THREE WEEKS after he came out, can't get a hold of him. RESPONSE TO OWNER: Posting our text and call log here for the world to see. Yes you finally responded after I called AGAIN on 2/20, that's after I already posted this review. You told us you will give us a quote in 3 days, took almost 3 weeks. Never once during those 3 weeks did you reach out to let us know what was going on. Look at the logs and texts, just bunch of outgoing calls from me and me texting you for update. There is no reason for me to lie to ruin your business, I said nothing negative about your quote or your work (can't attest to that). If I didn't like your quote, I could just say that, that's what reviews are for. My issue is that you're just not a very responsive business owner in my experience. I'm even more annoyed now that you accused me of lying instead of owing up to your mistakes.

Just hired Zeek for another window repair and the service was terrific as usual. Good…read morecommunication, quick response time, and a fair price. As I said to him, I hope I never have to call you again but if I do I'll be glad to do it.

Calcos windows was worth every penny! They initially came to take precise measurements and talk…read morethrough what my window options were as far as the products that they especially ordered for me. Their communication was clear through and through very helpful. On the installation day, the crew arrived on time and they were great. The windows look amazing and they cleaned up every little bit of a mess after themselves upon their departure. I would definitely hire them again for any future window needs in my 1927 Edwardian San Francisco Home. Many thank, Elise

We recently had eight windows and a sliding door installed by Cal Coast Window and Door, and the…read moreentire experience was outstanding from start to finish. Chris did an excellent job guiding the project and making sure everything went smoothly throughout the process. The installation crew (Manny and Omar) were absolutely amazing, professional, efficient, detail-oriented, and incredibly clean. They worked hard, respected our home, and left everything spotless when the job was complete. If you're looking for a company that provides great communication, quality workmanship, and exceptional customer service, I highly recommend Cal Coast Window and Door.

Let me just be clear that I did not use them for anything yet; however, their office manager Keith…read more who monitors Yelp requests is super helpful! I have some broken glass on our house so I sent out a bunch of quote requests on Yelp. All the other window companies responded saying they don't do small jobs like mine, and that's it. Keith, took the time to tell me what to Google and suggest I try to find glass repair shops who takes small jobs like mine. I am so grateful and next time when we want to upgrade our windows, I'm definitely calling Keith !

They didn't order my windows for over 12 weeks. I had 2 broken single pane windows and we had to…read moreget all the way through winter with them broken. They ordered the windows after I called to check in a delivery date so we had to wait 24 weeks from when we got a quote to when the windows were installed. Once they were installed they were sloppy. Do not use this business. Their communication is poor and their timelines are a joke.

We hired Sergey and Bestoff Windows to replace every single window in our home and couldn't be…read morehappier with how it went. They were noticeably more affordable than the other bids we got and there were no surprise charges along the way, which seems rare with home improvement projects. Everything was transparent and laid out up front. They showed up exactly when they said they would, and communication was excellent the entire time. Every question we had got a quick, clear answer, and we always knew what to expect next. Didn't have to call multiple times or send a bunch of emails. The new windows look fantastic the crew cleaned everything up after the install. No dust in the house or materials in the yard. We have recommended Bestoff to a few friends already. If you're looking for a window installer who's fairly priced, dependable, and respectful of your home, we'd recommend them without hesitation.

Sergey, the owner, was delightful when he came to give me an estimate. I liked that he made…read moresuggestions about changing a few things about the windows. His was also the lowest estimate of three. The crew that came to install the windows came on time (a little early) and got to work. They replaced all of the windows in my house in one day. The worked hard and were considerate to me.

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.

I had a good experience using this company a couple years ago to rescreen some windows which…read morerequired making all new screens. They were efficient and reasonably priced. But recently I had them come out for an estimate to replace the glass in 2 windows that have condensation, and have not received the estimate, even after calling a second time to request it. Maybe they don't need the business.

I am an agent and needed a quick window replacement from a break in to get the sale closed in time…read more I reached out, got a quick response from Sam, and he was able to turn everything around so fast and for an incredibly reasonable price. I have already shared Best Glass with my colleagues and plan to use them again for any future projects! Highly recommend.