Code: C (official acronym)
Description: This single letter is often used in DOB papers to mean “construction” or “construction work.” It appears as a short code in acronyms and plan or work type descriptions.
Practical Meaning: For a NYC homeowner, seeing the letter C in DOB documents usually means the item is related to construction work at your building, not plumbing‑only, electrical‑only, or boiler‑only work. It can appear inside longer acronyms (for example in “C of O”) or as part of work type names and plan descriptions that tell you what kind of construction is being reviewed or inspected.
Where You May See It: You may see C used in DOB NOW or BIS records, in permit descriptions, on plan titles, or in work type lists where it signals that the filing is for general construction. It also appears in DOB acronym lists, drawing standards, and professional guides that explain how to label construction documents and work types.
Why It Matters: Understanding that C stands for construction helps you quickly see which parts of your DOB file relate to structural or architectural work that can change walls, layouts, or openings in your home. This makes it easier to read permits, track which professionals you need, and spot if any major work might have been done without proper approvals.