Portland is very particular about sign placement and installation. And, what is allowable depends on so many factors. We've been doing this for 17 years; we have a wealth of experience to draw on. And, how long does it take? Some permits can be obtained immediately; others requiring design review take a minimum of 6 weeks. It's good to ask early what is allowable; we will help you through this maze of requirements and process. If you want the sign permit detail, the link is below.