Best SGS Inc.


About us

BEST Windows & Doors (BEST SGS Inc) is your #1 San Bernardino County Milgard dealer. As your local Milgard Platinum Dealer, we can bring our buying power to you. With our AAMA Certified installation crews and our team of dedicated staff we are proud to help you create the home you and your family deserve. With the level of experience, expertise and workmanship you can be sure that your window replacement will transform your house into a home. A visit to our beautiful showroom will allow you to experience why so many of your neighbors have chosen BEST Windows & Doors to install their Milgard windows and doors for their home. Whether you would like to leisurely browse and operate our award winning products, learn about the latest design and energy efficiency trends, or discuss technical aspects of your project, our professionally trained window experts are available to answer all your questions and help you find the perfect windows and doors for your home.

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 dealer must have an employee on staff that has completed the AAMA Installation Masters training and passed the AAMA Certified Installer 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



Monday 8:00am - 5:00pm
Tuesday 8:00am - 5:00pm
Wednesday 8:00am - 5:00pm
Thursday 8:00am - 5:00pm
Friday 8:00am - 5:00pm
Saturday Closed
Sunday Closed


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 Comm. 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.

Rated 5 out of 5 by 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. December 8, 2013
Rated 5 out of 5 by Great Customer Service! Best SGS Inc. Is where you should go for all glass installation needs! From great customer service to quick and painless installations, no one else compares. Put my mind at ease knowing I was working with hard working professionals who take pride in their work. Would recommend them to anyone. March 4, 2016
Rated 5 out of 5 by A great install once again Have been working with Best Windows since they opened their doors. While we don't have a lot of work for them, what we have had has been handled in a 100% professional manner and the install work has all been top notch. Just recently had an install that needed to be done before the Christmas holidays and even with our client's indecision as to schedule, Best Windows were able to pull off the deadline. Great job, great crew, great office staff. December 8, 2015
Rated 5 out of 5 by We love the windows and doors We love our new windows and doors........your sales rep. Mike Irwin was full of good info and very helpful......he got us what we wanted.......Hugo and his team of installers were very thorough and clean and did a great job......We couldn't be happier.......Mike and Penny Kellar June 1, 2015
Rated 5 out of 5 by Best Windows was absolutely the BEST choice! Replacing windows on a home our size was a huge investment and with so many firms to choose from we needed to insure we chose wisely. We had been referred to Best by a couple of the local contractors; hiring them was the 'best' decision we ever made! From start to finish their attention to detail was above and beyond. Devin, who initiated the process, was on top of it. Hugo, the site project manager, was incredible. He made a point to reach out to introduce himself and to let us know he would be on-site throughout the project. He added finish detail that was incredible. I could no doubt offer so much more to this review, but I'll end with - If you're shopping for new windows, save yourself some time and trust that Best Windows will be your 'best' choice! Thank you for making this part of our project so painless! Lisa Humphrey May 21, 2015
Rated 5 out of 5 by Great Experience Overall ! We needed to replace the windows and shower door in about half our house. From the first time Mike came out to talk to us about our options, we were extremely impressed. We got competitive bids, and found Crestline to be the best in service and competitive in pricing. Throughout the process of bidding, selection, scheduling, and installation, their work was top notch. We couldn't be happier with the quality of the product, the work, and the character and professionalism of the office and field staff. Thank you!! April 23, 2015
Rated 5 out of 5 by FANTASTIC SERVICE!!! Hugo and his crew arrived on time and installed 14 Tuscany Milgard Windows, and did a perfect job of installing and creating new borders. He kept me informed of what was happening at all time, and at the end of the job did all clean up. I highly recommend BEST WINDOWS to all!!! February 19, 2015
Rated 5 out of 5 by This dealer has excellent customer service! I had a great experience with best windows and doors! Devin is great Sarah is amazing she helped us with everything. I will recommend this dealer ask for Sarah everyone is awesome as well. Thank you, my doors and window are awesome. October 16, 2014
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