Summary: Fire units, including Engine 21 and Ladder 1, were dispatched to 15907 Ash Way in Snohomish County, Washington, in response to a reported fire alarm. Upon arrival, crews found no visible signs of fire or hazard at the location, which appears to be a courthouse or similar facility. The incident was managed under 'Courthouse Command.' Investigation revealed that on-site facilities staff were working on the system, and there was no actual emergency. All units were cleared and made available after confirming the situation was under control.