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.Our Building Plan Review is a multi-step design review process that we administer jointly with the Department of Buildings (DOB) to help the building community. Most construction projects in New York City require a building permit. Learn how to apply for and obtain a building permit from the DOB. Instructions to Applicant. A building permit is required for the construction, renovation, alteration, repair, relocation, demolition, use, and occupancy. Gather all the required documents for your project building plans, site plans, proof of insurance, etc. Bill takes us to school on how to properly dimension a floor plan. All structures require a Development Permit.