Architect to Interior Designers working in larger buildings in Ontario. Quotes in 1-3 hours, building permit drawings in 1-3 days. Public Corridors & Fire Separations specializes in small commercial interior alterations in large buildings. Stable, predictable pricing gives our clients confidence in bidding on projects with a minor architectural component. Our focus on this type of project means each is as important as any other. Specialization means we are fast and have a depth of experience in this sort of work you need when you have an unusual situation. All our clients' calls are usually answered personally by a senior architect with decades of experience- a rare thing. Many use this service as a check before committing themselves or to get quick advise on code issues that will affect their bottom line. Almost all of our clients are repeating clients.