Renovation or Alteration – How NYC DOB Understands It
Renovation – in everyday language, this means any work that improves, changes, or repairs a property, done by an authorized person. This work must follow NYC building and zoning rules and, when needed, must have the right DOB* permits and approvals.
In NYC DOB paperwork, most “renovation” projects are actually filed as building alterations. The DOB uses the word “alteration” on forms and permits, while “renovation” is the everyday word used by owners and brokers for the same type of work.
Basement renovation
Basement renovation in NYC often involves converting storage or mechanical space into usable or habitable rooms. Because basements must meet strict rules for ceiling height, egress, ventilation, and waterproofing, most basement renovation projects require DOB‑filed alteration permits and plans prepared by a licensed architect or engineer.
Interior renovation
Interior renovation usually means changing layouts, finishes, or building systems inside an existing apartment or house. Cosmetic work like painting or replacing flooring is often permit‑exempt, but moving walls, relocating plumbing or electrical, or changing room layouts typically requires an alteration permit filed with the DOB.
Illegal renovation
Any improvement, modification, or repair work done by a homeowner to their property without proper paperwork. This usually means work performed without required DOB permits, inspections, or approvals and can lead to violations, fines, and orders to legalize or restore the work.
Related terms
Some glossary entries use an asterisk* at the end of the term (for example, Renovation*). This mark is only a technical workaround to prevent the auto‑linking system from creating too many automatic links across the website. It does not change the meaning of the term.
What to do before Renovation
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