You can get copies of building floor plans for properties located in the City through the Department of Buildings (DOB). Floor plans may be viewed at no charge.With this tool, owners and managers can: Are You Planning To Start Renting Out A Room In Your House? If you own the home, you don't need any license. However, if you are in a condominium or coop as you often find in NYC, you'll likely need permission. Here are some helpful instructions for creating a great floor plan. While tenants in rent regulated or government subsidized apartments have special rights, many rules and laws apply to both unregulated and regulated apartments. Become Familiar with Landlord Laws; 6. Write an Airtight Lease; 7.