Question about possibly turning garage into laundry room and permits (Los Angeles).

[Dave Kay]

I recently acquired 4 unit in Los Angeles. The building has 5 detached garages, one of which is empty. I'm thinking of converting the extra garage into a (coin) laundry room for the tenants, as the building has no washer/dryer. 

Wondering if anyone has an idea of the permit process in Los Angeles for something like this... the cost, the restrictions, the hassle, ect ect. 

Thanks!