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Department of Buildings

In observance of the Indigenous Peoples' Day holiday, DOB will be closed and no construction will be allowed on Monday, October 9, 2023 without an after-hours permit. You may report illegal construction by submitting an Illegal Construction Inspection Request Form during normal business hours or by calling 311.

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Welcome to the Department of Buildings

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Net-Zero Energy

In conjunction with the DC Sustainable Energy Utility (DCSEU), DOB is proud to bring you Washington DC’s first volunteer Net-Zero Energy (NZE) Program. This industry-leading program is designed to help you meet the achievable goal of going Net-Zero regardless of project type or size. These helpful documents and guides were created to introduce the concept of DC NZE.

For NZE program questions, please contact us. We look forward to hearing about your project.

How to Participate



Resources and Information

Check out our NZE guides developed by New Buildings Institute (NBI); winner of our NZE education and outreach grant.

DC-ZE Project Guide
DC Multi-Family Guide
Integrated Design Charrette Toolkit



Smithsonian Castle