How much is the whole job going to cost? 10k, 30k? If you don’t have a permit, you are completely unprotected from any liability. If someone falls off a scaffold and dies you are getting sued. If your facade fails within 6 months of work being completed and you have water infiltration you are going to have a harder time recovering money. IMO you can’t afford to not do it the correct way. A call and estimate from an architect is free. Just see how much they want and what they recommend. They are going to adjust their fee accordingly, you will not be spanked for a job this small.