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As of December 10, 2025, all ACHD headquarters staff have relocated to the new office at 5800 North Meeker Avenue in Boise. Staff are available at our new headquarters for all in-person needs, including dropping off checks, submitting documents, and help with general questions.
Please use the following address for all mail and deliveries:
Ada County Highway District
5800 N Meeker Ave
Boise, ID 83713
ACHD's former headquarters building, located at 3775 North Adams Street in Garden City, is no longer open to the public. Future ACHD Commission meetings and other public events will be held at the new headquarters.
Don't forget! You can always connect with ACHD by calling (208)387-6100 or submitting an inquiry via ACHD Connect.
We look forward to serving you at our new headquarters!
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