Best SGS Inc.


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.

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

Consumer Experience 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.
Big Bear Lake, CA 92315
United States



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


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


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

The information shown on this page is provided by your local Milgard Certified Dealer which is responsible for the content of and views expressed on this page. Milgard is not responsible for the accuracy of such content, and any views expressed do not necessarily represent the views of Milgard Windows & Doors.

For full dealer information and product availability, please contact your local Milgard Certified Dealer.

Best SGS Inc. is rated 5.0 out of 5 by 19.
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 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
Rated 5 out of 5 by from Great service & knowledgeable staff! We purchased new windows and blinds for our home and were so pleased with the results! We dealt primarily with Devin, who was always helpful and professional, and timely in his responses. The process was seamless from start to finish. Being part-time residents, we look for people that we can trust and Devin never disappointed.
Date published: 2017-01-11
Rated 5 out of 5 by from Very pleased with the results ! This was my first time ever dealing with the world of windows. All I knew was I needed replacement windows soon. Devin was fantastic in explaining everything and keeping in touch with me during the whole process. I enjoyed dealing with everyone in the office and found them to be very professional and yet personable. Also enjoyed the install crew when they came out. My windows look great and you can tell they are quality made. Thanks again...
Date published: 2017-01-07
Rated 5 out of 5 by from Professional Start to Finish It was a refreshing change to have a company from start to finish exhibit excellent customer service, great product, a very fair price and a care for the quality of their work at our home. I would highly recommend them. Devin knows his business well and was the sole reason why we went with them. Chris the owner was professional and has a company to be proud of.
Date published: 2016-12-13
Rated 5 out of 5 by from Great service ! We have a wonderful salesman Named Devin, who came out to our home and helped us decide on new windows and doors and we are very happy we went with BEST Because they really did a great job and we are extrememly happy with the new windows and doors. Thank you Devin
Date published: 2016-12-07
Rated 5 out of 5 by from Fast, helpful and professional! I'm new to the area and found Milgard close by. I called and it wasn't long before I had a rep at my house helping me decide which windows would be best for my new home. Devin was very professional and quickly had his team installing my new windows!! Very thankful and impressed with the service.
Date published: 2016-11-26
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