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NYC Department of Buildings · Owner guide
NYC DOB Permit Types and Certificates of Operation
Need a permit for construction or equipment work in New York City, but unsure which Department of Buildings (DOB) authorization fits? NYC DOB permit types cover distinct work activities, including general construction, electrical work, excavation, cranes, scaffolds and building systems. Selecting the correct type depends on the actual work, the existing building record and whether another approval is also required.
This directory also includes two DOB-issued Certificates of Operation: Place of Assembly (PACO) and Temporary Place of Assembly (TPACO). Start with the Department of Buildings Table of Content for broader topics, or compare the General Construction Permit, After Hours Variance Permit and Alteration-CO Work Permits to find the next useful explanation.
Need help with NYC DOB permit types and certificates?
SLK Buildings can help property owners and project teams identify the relevant DOB permit or certificate, organize available records, and coordinate practical next steps with responsible licensed professionals and agencies within an agreed scope.
DOB Permit Types Table of Contents
Use the DOB permit types directory below to find the category that best matches your construction project or property need. Then select a permit or certificate topic. Each link opens a dedicated guide explaining the authorization and the next steps to consider.
Building Construction & Alterations
For new buildings, alterations, general construction and certain legacy DOB work permits.
Demolition, Excavation & Structural Work
For demolition, earthwork, foundations, structural work, and support of excavation.
Building Systems & Equipment
For work involving mechanical, electrical, plumbing, elevator and fire protection systems.
Exterior, Rooftop & Property Improvements
For changes involving roofs, solar equipment, signage, antennas and driveway access.
Construction Site Operations & Temporary Protection
For construction access, temporary site safeguards, cranes, scaffolds and after-hours work.
Place of Assembly Certificates
DOB issues these Certificates of Operation for qualifying assembly uses; they are not construction work permits.
Because DOB permit types cover different scopes of work, start with the kind of work being proposed, not just the project name. DOB issues work permits for specific authorized construction activities, while PACO and TPACO are Certificates of Operation. An Alteration-CO filing may require one or more separate work permits. The linked guides explain these distinctions and help you identify the applicable DOB process.
Before selecting a permit or certificate, identify the proposed work, the property address, and whether an existing DOB job filing is involved. Review the available application records and plans, where applicable, to understand what has already been approved. Some projects involve multiple work permits, while PACO and TPACO certificates serve a different purpose from construction permits. Records may also appear in DOB NOW or the Building Information System (BIS), depending on the filing. Confirm the applicable approval and permit status before assuming construction work can begin.
Seeking Professional Guidance on NYC DOB Permits and Certificates
Property owners and project teams may need to confirm which DOB authorization applies, distinguish historical permits from current work types, and organize existing drawings, job numbers and approved records. When permits, certificates or multiple trades are involved, the responsible professionals and DOB must determine the permitted scope and required approvals.
SLK Buildings Assists with NYC DOB Permit Coordination
SLK Buildings may help identify the agency process, organize available records, coordinate with owners, contractors and licensed design professionals, and track outstanding requests within an agreed scope. For a project-specific discussion, provide the property address, known job or permit numbers, existing approvals and the work being proposed.
SLK Buildings is an independent consulting and construction-management firm, not affiliated with NYC DOB or any government agency. Information is for general education and is not legal, architectural, engineering or other licensed-professional advice. Qualified providers must perform regulated services. DOB and other agencies control official determinations, and SLK does not guarantee permits, certificates, inspections, approvals or outcomes.