What’s the difference between a C of O and a BBL in DC?

C of O vs BBL in DC: what each one means, why both are required, and how a mismatch between them can block your rental license.

Frequently asked questions

What’s the difference between a C of O and a BBL in DC?

A Certificate of Occupancy (C of O) is a zoning and building document that says how a structure may be used — single-family, two-unit, etc. A Basic Business License (BBL) is a business permission to operate a rental at that property. You need both. The C of O comes first; the BBL endorsement must match the unit count on the C of O.

Do owner-occupied 1-unit rentals need a C of O?

If the property is the owner’s primary residence and they are renting a room, no separate C of O is needed. Renting the whole unit triggers a C of O review.

How do I look up my C of O?

Search DOB’s public records portal by address. If the result shows a use that does not match your rental plan, fix the C of O before applying for the BBL.

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Questions? Call (202) 883-8275, Mon–Fri 9–6 ET · support@rentreadydc.com