The physical work
A straightforward attached-garage installation with the panel nearby takes two to four hours. Longer runs, finished ceilings, or outdoor mounting push it toward a full day.
Panel upgrades or trenching to a detached garage typically become multi-day or multi-visit projects.
Scheduling and permits
Most installers can schedule within one to two weeks in the Indianapolis metro. Permits are usually pulled by the installer and are rarely the bottleneck; inspection follows the work by a few days.
How to make it faster
Send photos with your initial request. Installers who can see the panel and location in advance often order parts before the visit, which removes the most common source of delay.