Scaled drawings are required for most residential projects, except roofs, windows, and mechanical equipment. Installation/replacement of HVAC equipment requires load calculations (instructions are on the permit application). An architect is not required for residential projects, but is recommended for large projects and additions. Include cut sheets for any new equipment or devices. Written narratives of the proposed work is often necessary to fully explain the scope of the work. View a complete list of residential plan requirements.
Yes. Plans for commercial projects must be prepared and stamped by a state licensed design professional.