We got the remaining 12 windows installed by Alex, Angel and Jose 6/4/19. They showed up right on time, and even managed to finish a few hours earlier then the estimated time. This was a good thing considering it was 90 degrees outside. Alex, Angel, and Jose work very well together. We provided them with cold water, and Subway for lunch to keep them all happy. Thanks again Sergey :) read more

If you're looking for the best, go with Bestoff Windows :). I had 12 windows and one sliding door replaced in my condo. The original windows were terrible: almost 40 years old, broken locks, condensation building up on most of them, and noise just passed right through them. Plus, they somehow managed to make my home hotter on hot days and colder on cold days. My PG&E bills were ridiculous. Who knew windows could make you so miserable? Sergey recommended Simonton windows, and I went with his recommendation. The new windows are amazing: my home is no longer drafty, and the temperature is a lot more bearable, even on hot days. The noise has lessened considerably. For my project, the turnaround time was fast: once I signed the contract, it was just a few weeks until my order came in. Once they arrived, Sergey was able to get his crew out to my home within a day for the installation. Alex and his team got the windows installed in 6 hours, and the entire finished product looked incredible: the windows are polished and elegant. Alex and his team were friendly and polite and left everything tidy and clean. If you need new windows, definitely go with Sergey and team at Bestoff Windows. read more

I am really happy with my newly installed windows. They definitely make a huge difference comparing to the old, single pane windows. Sergey did a great job explaining his product, different lock options, and made a great suggestion as to which window should be sliding for a better air flow. We agreed to all his suggestions, and are very happy. He was honest and didn't even try to upsell anything extra, or lean us towards higher priced option based on our needs. The crew was very nice, professional, installed all the windows in just a few hours. Will definitely recommend Sergey to everyone! read more

I honestly can't say enough about Sergey or his Team. They replaced 14 windows and a slider in 1.2 days. The windows in my home were 27 years old, worn-out, cracked, gaps in the closure, etc. Sergey came in and made recommendations. There was no upselling, or padding in extra unnecessary costs. He graciously waited on a 1.5 month HOA approval. Once that approval came in, he came back out and finalized the measurements. His crew is efficient, effective and did an amazing job installing my beautiful new Anlin windows. They even cleaned my porch off because I was working and knew that I wouldn't be able to get to it for several days. These new windows added so much beauty to my home. The noise reduction is about 50%. I sit on a corner and I used to hear a bunch of street noise which is now greatly reduced. I highly, highly recommend him and his Team. read more

What a surprisingly easy experience! Sergei is lovely to chat with and so professional and kind. Everything was straight forward, no gimmicks or run around with the quote and the planning, and his staff that did install are PHENOMENAL. The install experience was fast and clean, 5 hours for 8 windows and a slider, plus the guys were all considerate and friendly. Overall so much easier than I expected! read more

Last Saturday (July 31), we had 7 windows replaced by Bestoff Windows. Everything about this company was top notch. Starting with Sergy who came out, measured and gave us an estimate on the spot. The guys were here on time, removed and installed all 7 windows in 3 hours. My husband is not big on having someone work on our home but he too was very impressed with Sergy and his team. read more

BestOff Windows Inc - Windows Installation Near Me - Concord, California

Amazing service from start to finish. The craftsmanship on the windows is impressive. No traces that our old window were ripped out an replaced. The 9 windows and a slider doors were all done in 1-day. My neighbors came over the next day and immediately put in a call to have their windows done. My favorite part of the transaction was there was NO B.S. From sales quotes, to windows ordered, to install, was compete in 20 days. I also own a business here in a Brentwood and am happy to give Bestoff windows my $$$ read more

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Surgey and his team did wonderful job in replacing windows of my entire house. His job quality is excellent with my five-star rating. Surgey is a great guy who gave me many useful tips and suggestions. I definitely recommend people who is going to retrofit windows. read more

I highly recommend Bestoff Windows. Quality work at a fair price. What else can you ask for? Sergey, the owner is very knowledgable. He helped us pick out the right windows without trying to oversell. read more

Sergey was quick to respond to our inquiry and came out to do a free estimate. He was very friendly, and knowledgeable, and gave us advice for our windows. I felt comfortable with him, that he was trustworthy. Very competitive pricing. read more

Sergey and his team did a wonderful job in installing our new windows in my home to replace 30-year old ones. The process of working with Sergey was a pleasure as he is very knowledgeable and professional. The installation work by Alex and crew was also super-efficient and our windows look amazing. I would strongly recommend Sergey and Bestoff Windows. read more

Extremely happy!! It was truly a great pleasure to work with Sergey! He is friendly, extremely knowledgeable, reliable and clearly cared about his customers. His honesty is very refreshing and we felt that we can wholeheartedly trust him. He didn't push the high price products just to sell but he listened and provide products that fit your needs and expectation. We are very impressed with the quality of the windows and doors and the expertise of the installation crews. We ended up replacing all windows and doors at a very reasonable price!! Highly recommended!!! read more

Can't say enough good things about Sergey! He was very responsive. You want someone knowledgeable to replace windows so as to avoid leaks. I wish we had his counsel years ago! read more

Great experience working with Sergey and his crew. Sergey came out to our house and gave an estimate after taking measurements. The estimate was lower than others we had gotten. Everything went according to his estimated schedule, and he communicated with us promptly throughout. The windows look great and we are happy we chose Bestoff! read more

Sergey's team did an excellent, dilligent and amazing job. They came at 9am and were done by 1:30, installing 8 windows and a patio door. Besides the quality window brand that Sergery recommended, the windows were perfectly installed and left spotless! thank you, read more

We had over 20 windows replaced by Sergei and his team; and the pricing as well as workmanship was amazing. Their work was very efficient and spot on. Our house is now well insulated against weather and sound and it looks beautiful from inside and outside. In fact, it was so great that 3 of my neighbors are now lined up to have their windows replaced by Bestoff!!! We highly recommend this company for a stress free and quality work. Thank you Sergei! read more

Had a shockingly negative experience with the owner of this business. After getting a quote on our windows, I called back a month later to negotiate a deal and Sergey didn't remember visiting my home and accused me of lying. He started yelling at me and said he didn't want to do business with me and my fiancé. I was extremely upset because eventually he remembered, and apologized over text, and went back and forth saying he'll work with us, and then changed his mind again!! This is NOT how you treat your customers. I felt mistreated, and disrespected....so go elsewhere unless you're okay with the risk of getting yelled at read more

Our new Simonton DaylightMax windows arrived today and now they look amazing after the installation is complete! The insulation of these quality windows is stunning! Our backyard is close to a busy street and when cars pass by, we could hear the loud noise but now with the new windows, we barely hear anything or at least the noise is very minimal. We have no doubt these windows will last for many years to come. What we liked about Bestoff is we did not pay a dime until windows were all installed and that we were completely satisfied. We loved the attention to detail when each window was installed. The calking/sealing is done to perfection. Another huge thing is that Bestoff beat the quote we got previously from Home Depot and Lowe's! Sergey's quote was definitely more competitive! Also we were not home at the time when they finished the work and Sergey said no problem you can mail the check! This was extremely convenient for our busy schedule. We wanted to write this review to thank Sergey and his team for such a smooth business transaction from A to Z. Five stars well deserved! read more

BestOff Windows Inc - Windows Installation Near Me - Concord, California

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Sergey responded quickly to our inquiry and came to our home and discussed our window replacement needs professionally and answered all our questions. The windows and sliding doors took awhile to arrive but as soon as they came in Sergey's team installed all of them (and one required construction) in 2 days. The team was friendly, polite and cleaned up after themselves and the windows and doors are beautiful. We highly recommend Bestoff Windows. read more

We hired Sergey to replace all of our windows in our house as well as our back sliding door, based upon other Yelp reviews as well as a recommendation from a personal friend who used Sergey the past. He did a great job and was in line with his proposal. The estimate was very competitive and his crew did a great job with the installation as well as the cleanthe cleanup afterwards. Most importantly, there were no surprises. The work was done on time and in line with the estimate. I would highly recommend Bestoff Windows. read more

So this review is long overdue. Sergey and his crew installed my windows last year fall-ish before winter of 2020 and my wife and I are so happy with their work and going with Bestoff. We're always relaxing and at random times just mention about how it's the best big purchase decision we made for the house looking out into our yard. Especially looking out from a picturesque window we switched from an old sliding on sergeys recommendation. Living in Vallejo we have a view of Mt Tamalpais from the back window and it's now ten times more awesome as well. My wife initially reached out to Bestoff when we were gathering quotes and it was easy communication using group text. Right from beginning with prompt easy going replies and accommodating in our scheduling. On our appointment Sergey was their early and just waiting in his car and arrived on the dot as to not impose too early. Covid worries and all that Appreciated the consideration! went through quoting full replacement of all windows totaling 23 and a sliding door and from 4 quotes was by far the most competitive quote saving thousands $$$ compared to everyone else. Was even a slight upgrade in brand and warranty with Anlin compared to some others quotes I got for simontin For install I was worried because it was end of fall and started to get into rainy season. But sergey assured me they could do it in 2 days. And he confirmed with weather prediction on that weekend they were available looked to be good weather for the installation. But he would also reconfirm few days prior because you never know with trusty weather predictions. Closer to the date, he confirmed weather was still good to go and we went for it and his three man crew was prompt, efficient and friendly(masked during times of high Covid worries) replaced the top floor windows first day, Saturday and bottom floor windows and sliding door that Sunday. Awesome install quality and great quality products! No complaints and did I mention so happy! Cooler in summer, warmer in winter and quieter in noisy Vallejo! Thanks Sergey to you and your crew! Also love the recommended change to the casement windows upstairs! read more

highly recommend, they did quick clean work good communicators, very transparent and a pleasure they carry only certain brands and the styles may not be for everyone but were perfect for us, and I hope we can use their service again read more

Sergey's crew replaced 9 windows for me last week-end and now I have the nicest windows in the neighborhood. The 2 man crew showed up at 830am and left at 230pm with no mess. Everything was done professionally and they even made a new wooden frame for the window in the garage. Prices were also affordable for the Monte Verde Windows that exceed energy star requirements. I got the slide windows which are easy to slide open and lock shut. Sergey also calls you back in a timely manner and got our windows installed within 3 weeks of ordering. read more

Found this contractor via yelp because of the 5 stars reviews thy got, and yes, they deserved 5 stars!! I was looking for a contractor to replace all my windows at my town house in San Leandro in March, I contacted a few companies and decided to go with Bestoff Windows. Sergey (the owner) came and gave me a very reasonable quote (lowest compared with all the other ones I contacted). He is very nice and patient and offered his best advice on the brand and installation to fit best for my home. He even told me to save money, I should obtain the city permit myself. And when I told him I don't have time to deal with city, he did it for me and only charged me what the city charged with no additional fees. The installation process went very smooth as well, the 2 staffs that came are professional and fast. They completed all 5 windows (including a huge patio door) within 5 hours and cleaned up everything. This is way faster than my other house's window installing via another company. I highly recommend this company! read more

We got quotes from about 6 different places and they literally ranged from 22K to 5K ;mind blowing!). Several people recommended Bestoff so of course they were on our list. Sergi was professional and knowledgeable when he came to give us a quote. He had a no pressure sales approach, which I found can be quite rare when looking for windows! We decided to go with Bestoff - they had almost the best price and the best reviews and recommendations. We had to wait a few weeks for the windows to come in and then our sliding glass door was broke. They came to install the windows and explained what happened to the door. We had to wait another week to get the door installed. The waiting was outside of Bestoff's control and we go that. The installation for both days was hassle free for us. The installers were friendly and followed all Covid safety precautions. They thoroughly cleaned everything. The windows and door look amazing and they work wonderfully. We couldn't be happier and highly recommend Bestoff! read more

BestOff Windows Inc - Triple sliding door. - Windows Installation Near Me - Concord, California

The owner of the company, Sergey, was extremely nice, didn't try to push extra costs, the installers were wonderful, and I love my new windows. read more

Mr Bestoff is the only one who responded of the many I contacted for new windows. Excellent job done! Will gladly hire if needed.

We love are new Anlin windows and sliding door. Sergy and his crew did an amazing job. On time and price point was unbeatable compared to other companies. Would highly recommend Bestoff windows if your looking to get new ones. read more

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Sergey and his crew replaced 8 windows and 2 patio doors. I was extremely happy with the results. My neighbor came over to look at the the job and he also got new windows by them 1 month later. Sergey went through the options and he is very through and transparent about the pros and cons of each window choice. His estimates was very excellent. Significantly better than anything Home Depot offered, even with their annual 20% off sale. I went with Anlin windows which were slightly more money but offered better sound insulation and great customer service should I need to them replace them in the future. His crew came out and efficiently replaced the windows. And the next day, the building inspector came out and signed off on the work, no problems. read more

Sergey and his crew were awesome! Great customer service from Sergey leading into the install. Very friendly guy and answered all my questions making it an easy decision to go with Bestoff (and of course very competitive pricing as well). The Anlin windows/slider they installed looks great and we can see the better efficiency too. I watched them install the materials and am impressed with the attention to detail to making sure everything was sealed up and as efficient as possible. We were happy we only had to wait about 5 weeks for the windows/slider to be delivered and Bestoff was ready to install them literally 2 days later! Thanks again Sergey! read more

Excellent work. Extremely professional and finished installing a full house of windows in a day and a half.

We have been so happy with our new windows! Sergey came by within a few days of calling (many other people couldn't come out for weeks), and after some quick measurements provided an immediate quote with very competitive pricing. We accepted and he came back later that same day to take detailed measurements. The installation team was fantastic. They arrived on time, worked quickly and cleaned up after themselves. Our entire house had new windows in just one day! We love the quality of our new windows and cannot say enough good things about Sergey and Bestoff Windows. Thanks for a fantastic job! read more

BestOff Windows Inc - New windows in our dining room! - Windows Installation Near Me - Concord, California

We had a great experience with Sergey and Bestoff Windows. Everything went smoothly and positively, with great communication, throughout the entire process. From scheduling, estimating, ordering, and final installation. Sergey is very helpful and upfront about the process as well as the pros and cons of different options. He educated us about the advantages of modern Simonton replacement windows and over our 30+ year old aluminum replacement windows. The estimate was timely and fair, the windows arrived much sooner than promised, and installation took 1 day from start to finish for 6 windows plus a sliding door. Installation was done professionally and well, with good attention to craftmanship and detail. I am very satisfied with the looks and performance of our new windows, and I'm glad Sergey and Bestoff Windows installed them for us. I highly recommend this business and would not hesitate to use them again. Sergey did forget to mention one advantage about our new windows: they block WAY more noise than our old windows! Now we enjoy a much brighter, much quieter house and experience less freeway noise than before. I could not have imagined how greatly I would enjoy everything about new windows, but these Simonton windows are fantastic. Thank you Sergey! read more

This afternoon I had Sergey come out to give me a quote for new windows. This would have been my second quote. The first quote was for $29,000. I had read the yelp reviews of Bestoff Windows and decided to give him a try. My home is 14 years old and we had problems with items outside heating up. I told Sergey this, as well as the first contractor. Sergey explained to me the windows I have are of good quality. He said he would love the business of replacing them for me, but I would only get about a 10% difference. Sergey told me my better option would be awnings on the areas which heat up. He also suggested that I get an attic fan. In the end Sergey did not sell me any windows. He is an honest businessman who I will definitely refer to any of my friends or family getting windows. I usually don't leave Yelp reviews on anything. However I find it refreshing there are still honest people out there. read more

100% satisfied with Sergey, Alex and Jose. Bestoff Windows replaced 3 sliding doors and 8 windows (of varying sizes) in our home, and they did a fantastic job. Sergey was fast to give me a rough (accurate) quote before we put an offer on our place. The whole process was painless: communication was clear and prompt, and the ordering and installation was a breeze and done in a timely manner. We chose Anlin windows and couldn't be happier with the way they look and the ease of opening/closing the windows and doors. Alex and Jose were efficient, hardworking and left everything clean. The only thing we recommend is wearing booties inside since some people (like us) have a custom of not wearing shoes inside the house. Two thumbs up! read more

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I'm so happy with my new windows. Sergey provided me with several options and quoted me with a great prize. They replaced all the windows in my house in two days. The crew worked non stop to finish the work on time. In the end I recommend for the prize and their craftsmanship. Happy Customer! read more

This company is absolutely amazing. Timely, honest, affordable, smart. Great communication... I can't say enough. If you are replacing windows use Sergei and company! I love them and all the advice given was perfect. read more

We love our Simonton windows! Sergey was a pleasure to work with and gave us by far the best quote. The guys who installed the windows were great and pros. I highly recommend them if you are in need of windows. read more

Sergey was a pleasure to work with. I appreciated his honesty and his non-pushy nature in providing window options for our home. Also my wife and I had a pretty aggressive timeline to get the windows installed since we were expecting a baby soon at the time and Sergey was able to squeeze us in his busy schedule to get the job done. His team was prompt, friendly, communicative, and finished on time. We are very pleased with our windows and would highly recommend Sergey's service to anyone who is seeking to replace and upgrade their windows. read more

Working with Sergey was a pleasure from the first estimate to the completion of the project. When he came to give me an estimate he was friendly and straightforward, didn't waste my time trying to "sell" his product (as I had to endure from another company) but just gave me the facts up front. He gave me a couple of options but suggested what he thought would be the best match for my house style and budget. Not only that but he sat down right in my living room and worked the numbers so he could give me an estimate immediately! The windows came in more quickly than his estimate, and he called me right away and set up an installation time. My husband was there when the workmen arrived, and they were prompt and cleaned up after themselves. All in all a very easy, simple experience with no drama or confusion. I will absolutely be hiring Sergey again when we've saved up enough to do the rest of the windows in our house. read more