No. An architect's stamp is not required to submit house plans for permitting anywhere in the country. A plan may be required to undergo a structural engineering review by a licensed structural engineer. This is typical and most common in seismic and high wind regions of the United States and Canada. Architects are artists and they, like designers, draftsmen, and homeowners, are all potentially subject to engineering reviews.
Check your local building department for details and read Our License Agreement & Stock Plan Disclaimer for additional information.