Build, rent or sell property Information on the City's rules and permits for constructing, modifying, renting, or selling property. City building codes A summary of City building codes, and a link to the complete code. Get a building permit Instructions for finding and obtaining the permits you need for a building or construction project. Get a Certificate of Occupancy Instructions on applying for a Certificate of Occupancy, which is required by the City for some construction projects. Get a property sales certification Information on how to get real estate certification in Philadelphia. Report a dangerous building or code violation Directions for reporting a building code violation through Philly311 or an online form. Search for property history and business license information Search for information on a property's trade licenses, violations, and permits or search for business license information.