Code: CCD1 (official form)
Description: Construction Code Determination Form. This is a DOB form used to request an official interpretation or variance of the NYC Construction Codes and related rules. It documents a formal “Construction Codes Determination” request for one specific code issue.
Practical Meaning: For a NYC homeowner, this form is usually prepared by your architect, engineer, or code consultant when there is a gray area in the Construction Codes or when they need DOB’s written approval to do something different from the usual rule. It is often used to ask DOB, in advance, how a specific code section applies to your project, or to request a variance or special permission that could affect your design, safety features, or costs.
Where You May See It: You may see this code mentioned in your architect’s proposal, in emails about “CCD1 / ZRD1 determinations,” or in DOB NOW: Build under Determinations for your job. It also appears in DOB forms lists, service notices, and design professional guides that explain how to ask for code or zoning determinations and appeals.
Why It Matters: An approved CCD1 can solve code disputes, prevent costly redesigns, and give you a clear written answer from DOB about what is allowed on your project. However, it can also add time and fees, and a negative determination may limit your options, so it is important that your design professional uses this tool carefully and explains the risks and benefits to you.