Obviously, new construction would usually require an Architect or Engineer. It is strongly suggested that you retain the services of a professional Architect or Engineer early in the planning process whether considering new construction, or using an existing building. First of all, state law requires these persons to be licensed. Be certain the person you hire is licensed. Unfortunately, this agency cannot recommend Architects or Engineers.
Word of mouth is probably the best method.
As in most professions, some are better than others, and the fees obviously differ. Contact the local health department directly for their requirements. Schools are also subject to Barrier Free laws for handicapped access. Electrical approval must be obtained from the electrical authority. After all plans have been reviewed by the Office of Fire Safety, you will need to request inspections from this office.