Best SGS Inc.

Diamond Rating

To earn the Showroom Diamond, the dealer must have a showroom with a minimum number of Milgard products on display.
To earn the Web-Site Diamond, the dealer must have their own Web-site with information about the Milgard products and the services they sell.
To earn the AAMA Certified Diamond, the dealers must have at least one member from each of their installation crews complete the AAMA Installation Masters training and pass the AAMA Certified Install test.
To earn the Product Knowledge Diamond, all Dealer Sales Consultants must pass a series of standardized Milgard administered tests demonstrating Milgard product knowledge.





42181 Big Bear Blvd (Hwy 18)
Big Bear Lake, CA 92315
United States

Store Hours

Monday8:00am - 5:00pm
Tuesday8:00am - 5:00pm
Wednesday8:00am - 5:00pm
Thursday8:00am - 5:00pm
Friday8:00am - 5:00pm
SaturdayBy Appointment Only

Services Offered

Consumer financing
Free estimates
Has Showroom
MGWS Dealer
New construction
Offers installation
Replacement Specialist

About Us

BEST Windows & Doors is your #1 local Milgard Platinum dealer. Our AAMA Certified installation crews and dedicated staff are eager to help you with your window and door needs. We pride ourselves with the level of experience, workmanship, and dedication to you, our customer. Come and visit either of our beautiful showrooms and we can show you why so many of your neighbors have chosen us to install Milgard windows and doors.

Awards Received

  • Milgard Platinum Dealer
  • AAMA Certified
  • LEAD Certified
  • Big Bear Lake & Arrowhead Chamber Commerce Member
  • Big Bear Contractor Association Member

Areas Served

Big Bear Lake, Big Bear City, Lake Arrowhead, Twin Peaks, Crestline, Running Springs, San Bernardino, Ontario, Apple Valley, Adelanto, Lucerne, Hesperia, Yuciapa, Redlands, Fontana, Highland, Morano Valley, Loma Linda, Riverside, Rancho Cucamonga, Rialto, Banning, Beaumont, Palm Springs, Palm Desert

42181 Big Bear Blvd (Hwy 18), Big Bear Lake, California, United States 92315


Best SGS Inc.

See All Reviews
Best SGS Inc. is rated 4.9 out of 5 by 22.
Rated 5 out of 5 by from Best SGS Provides Outstanding Products, Installation, and Service Everyone at Best SGS goes out of their way to ensure complete customer satisfaction. It starts with the sales person, and continues through product ordering and installation completion. The office is equally driven to make sure that the customer is satisfied. Attention to detail ensures that the customer receives the product expected, and the installation team completes the job quickly, professionally, leaving no hint that they were ever there....except for the new, beautiful windows. I highly recommend the Best SGS Team.
Date published: 2013-12-08
Rated 3 out of 5 by from Milgard Slider Installation and service We had Best install/replace our windows and sliders. I have to say I was impressed after reading the reviews. Devin our sales person was knowledgeable and informative. The windows were installed in mid December 2021. The rear slider has been a issue since day one. The slider doesn't appear to be square the door is difficult to lock if you don't slam it shut. The screen has been broken twice during installation it has to be pried in place. It is presently warped and it has to be slammed to close properly. Best has sent service people out as the schedule allows and 4 visits to repair/align a screen door is a red flag that something isn't right. A screen should be an easy fix if the window had been installed correctly.
Date published: 2022-05-15
Rated 5 out of 5 by from My loyalty lies here for all my glass needs!!! Absolutely fabulous work throughout my entire home! Doug & Rick exceed all expectations with outstanding customer service that is personable, professional and efficient. Being new to the mountains I had received several quotes from other companies that accompanied many frustrations until I connected with Doug @ Crestline Glass where everything went smooth from start to end of project. With reasonable quotes, top quality work and great customer service I have continued to hire them for all my glass needs over the last 2 years, including referring them to others! Rick has installed several custom glass projects for me; shower stalls, table top glass, mirrors & beautiful decking glass for an unobstructed view of Lake Arrowhead. I absolutely love the craftsmanship along with the care this company gives me, extraordinary over ordinary! My loyalty lies here for all my glass needs! ~SKYHOUSE (Lake Arrowhead)
Date published: 2019-05-06
Rated 5 out of 5 by from Very Professional, highly recommend them. Best just completed installing 11 new Milgard windows in our Big Bear Lake cabin. We had contacted both Best and Bear Valley Glass for quotes. With Bear Valley Glass, they had to make an appointment about 8 days out. Called the day before and had to reschedule the appointment. The new appointment was the afternoon, three days later. They showed up in the morning so I wasn't there to meet them and discuss the process. It took them three days and several calls to get the quote. It was emailed, hand written, lacked detail, and was almost illegible. Devin, with Best was there the next day. He spent all the time I needed to get all my questions answered. I received the quote the next day. It included diagrams of each window with a summary of finishes, features, and dimensions. It also included a detailed explanation of what was included, time required, and method of installation. The labor estimates for Best and Bear City Glass were very close. Best was about $1,000 less that Bear City for the materials (windows). I found that strange because both companies were bidding the identical Milgard windows, finishes, and sizes. Needlessly to say, I called Best and told them they got the job. The next day they had their installation foreman, Hugo, come by to meet me and reconfirm all the dimensions, finishes, and answer any additional questions that I had. The next day they called me to confirm that the window order had been turned in and that Milgard was starting the window manufacturing process. Two weeks later, they called again to confirm the installation date. Two days prior to the scheduled installation date, they called again to reconfirm the installation date and time. Hugo and his crew of six factory trained installers showed up on time when scheduled (unusual for Big Bear Lake Contractors). It took them 1 1/2 days to install the 11 windows. Everyone knew what to do and they worked really well together. As they progressed with the installation, they kept their work areas clean and were always courteous, efficient, and respectful of our home. I am pleased to write this recommendation for Best Windows and cannot complement them enough on their customer service from start to finish, efficiency, pricing, and quality of work. And - we love the Milgard Windows. Mike B
Date published: 2017-08-15
Rated 5 out of 5 by from Love this company - Love our windows! Crestline Glass/Best Windows is awesome! The thought of replacing our windows brought us a lot of anxiety about the process, the expense and the choices, and a lot of questions. Crestline Glass made the process a breeze from the very beginning. They were flexible and pleasant when scheduling the initial consultation. At the consultation, they were professional, informed and beyond patient. They took the time to explain our options and never hesitated when our questions just kept coming. Of the contractors we spoke to, they were the ones to provide complete answers, an assortment of options, and consistent, timely communications. The installation process was further confirmation that Crestline Glass/Best Windows was the best choice. The window replacement team was prepared, skilled, and super courteous. The installation was done in the time promised, they were careful of our belongings and they made sure everything was clean and orderly at the end of the day and project. We can’t say enough good things about this company, the team, or our windows! We highly recommend Crestline Glass!
Date published: 2017-06-20
Rated 5 out of 5 by from My Crestline Glass (Best Windows and Doors) dealer was absolutely fantastic from beginning to end. I adored the entire process of buying the windows from initial contact through installation. The windows are beautiful and well worth the investment. The whole house was done and now I have ordered a door as well. The project was completed on a cold and windy day without complaint and the crew was so accommodating to my particular needs and were even kind to my dogs. The effect of the windows in my house are so nice, I don't even hear the wind, and I know I will love them this summer as well. I took down all my drapes and valances to enjoy the windows except for a bedroom. I highly recommend these windows and Best (Crestline Glass) Windows and Doors.
Date published: 2017-03-29
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