County government offices listed below are located at the One Justice Square building at 446 West Crogan Street (corner of West Crogan Street, Langley Drive, and Constitution Boulevard) in Lawrenceville. This building is located approximately one block from the Gwinnett Justice and Administration Center building.

• Planning Division (Department of Planning and Development)
• Licensing and Revenue (Suite 125)
• Water and Sewer Plan Review Section (Department of Planning and Development)
• Stormwater Plan Review Section (Department of Planning and Development)
• Fire Marshal's Office (Department of Fire and Emergency Services)
• Transportation Plan Review Office (Department of Transportation)
• Administrative Offices (Department of Planning and Development)
• Building Permits Section (Department of Planning and Development)
• Building Plan Review Section (Department of Planning and Development)
• Development Inspections Section (Department of Planning and Development)
• Development Review Section (Department of Planning and Development)
• Development Services Section (Department of Planning and Development)

The One Justice Square building is located at the intersection of West Crogan Street, Langley Drive and Constitution Boulevard, about one block from the Gwinnett Justice and Administration Center. Visitors may enter the parking lot from either West Crogan Street or Constitution Boulevard.