San Francisco Bay Area General Contractor

San Francisco Bay Area General Contractor

G.T.I, Inc has been offering general contracting services to the San Francisco Bay Area and all surrounding counties since 1989. We are specialize in all kinds of Commercial and Residential Construction Work. You can view our full list of services under the Services Menu. With over 20 years experience, you are guaranteed to have peace of mind knowing Greentech Industry, Inc is handling your general contracting needs.

We have a highly trained staff ready to serve all of your Roofing and Gutter needs.

Our referral based business continues to grow through satisfied customers.

We are committed to providing our 'partners' with professional solutions to a variety of roofing types and continue to update our knowledge in an ever changing industry.

Our Mission is to provide the highest quality of service and trust to every customer we serve.

Quality Customer Service is our one and only priority, nothing else!


We strive to give you exactly what you want and understand the difficulties a customer faces when choosing a company because we are customers also.   

Whether it be residential solutions or complex commercial situations, at GreenTech we believe we have the 'right' answer for our partners and seek 100% satisfaction. From top to bottom, our team's sole purpose is to stand behind our commitment to a standard of excellence working hard to exceed your expectations.

We look forward to starting a new 'partnership' with you for your solution and are happy to answer your questions or provide you with an estimate.