I am located in the Bronx, NY but my answer will be for general use to other contractors. One solution is to try to work with a few local architects to provide licensed contractor services for all jobs requiring work permits ( plumbing, electrical and construction) and general construction services upon approval of filed plans by the Architect which has been approved by the Buildings Department. The client will now need the general contractor ( GC ) to move to the next step to execution and completion of the project. This will require patience and time however a few successful missions ( jobs ) with the Architect (s), over the next few years and this will be successful mission for a bite at the apple.