Patio Shed Roof Design

I need a detailed drawing for attaching a wooden, shed-style (flat) patio shed roof to my existing home. Patio roof will be 24 feet wide and the span from the existing home exterior vertical wall will be 16.5 ft. - with a 1 foot over hang, attached to the top of the home roof as in the attached examples. I need drawings to submit for permits.
Ideal skills and experience:
- Proficiency in architectural or structural design
- Experience with wooden structures
- Knowledge of shed-style roofs