Green Homes Keystone Interiors is a general contracting company that has been in the business of providing exceptional quality and service at very competitive rates in the commercial, industrial and residential construction and renovation industry since the company was established in Toronto, Canada, in 1983.Contact UsAt Keystone, in our 25+ years of existence, we've worked with many large, medium and small sized businesses along with a very large number of non-business customers. Our longevity is due to the fact that honesty, integrity, cooperation, listening to the customer, attention to detail and an emphasis on getting the job done right the first time have always been hallmarks of our company. The job is not complete until the client is satisfied. These claims are not hyperbole, these claims are supported by a very long and eclectic list of clients which includes business owners, corporate executives, interior designers, finicky aesthetes, people with an eccentric vision and just the average person looking to renovate their home. we've even done work for the Saudi Royal family! more... See more text