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Department of Buildings

In observance of Juneteeth, DOB will be closed on Thursday, June 19, 2025; no construction will be allowed on this day without an after-hours permit. You may report illegal construction here or by calling 311. 

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Zoning Administrator Interpretation 7: Rooftop Architectural Element


Friday, May 3, 2024
Reference: 
ZA-007

Interpretation ZA-007: Roof Top Architectural Element is superseded in part by D.C. Municipal Regulations Title 11, Subtitle E, Section 204.1 and 204.2. 

Applicants should also be aware of the “three foot rule,” that an addition of a floor or penthouse, usually behind the protected architectural rooftop element, must be set back at least three feet from the element in order to help preserve its architectural integrity.