This document updates the 1981 Upper Marlboro Design Guidelines and refines urban design and public realm design recommendations from the 2009 Upper Marlboro Town Action Plan. The written and graphic design guidelines of this pattern book are intended to create a shared vision for the physical form of the town core buildings and the public realm. This document is meant to be used as a reference manual in making public, private, and non-profit development decisions involving new construction, additions, alterations, renovations, restoration, signs, street furniture, and landscaping.