Duluth UDC § 306.04

a. Public entrances must be distinguished from the principal plane of the facade and provide shelter from wind and sun. This may be accomplished by recessing the entranceway, placing in an arcade, under a projecting canopy, or within a mass or tower projecting from the primary facade. b. Blank walls that can be seen from any public or private street are prohibited. Front facades shall have at least 25% of the wall facing the street in window or door areas. c. Pedestrian Oriented Facades: Facades with non-residential active uses must be fenestrated with transparent windows and doorways for no less than 60% of the street frontage at the ground level and allow visibility to the inside of the building. Any fenestration of frontages with active uses must have visibility to the inside of the building with at least 75 percent open to perpendicular view within a 4-foot by 4-foot “visibility zone” at pedestrian eye level. This visibility zone is located between 4 feet and 8 feet in height above sidewalk level and extends 4 feet from the surface of the window glass inside the building. 1. Pedestrian Eye Level includes the space that is between 4 feet and 8 feet in height above the adjacent sidewalk level, following the slope if applicable. 2. Visibility to the Inside of the Building means that the area inside the building within 4 feet from the surface of the window glass at pedestrian eye level is at least 75 percent open to perpendicular view. d. Walls shall have offsets, jogs, changes in allowable building materials, or other distinctive change in the building facade. Any development consisting of a building longer than 100 feet must have off-sets in the horizontal plane that are at least 18 inches in depth and at least 5 feet in length for every 100 foot of frontage. Horizontal off-sets utilized to accommodate exterior outdoor café type settings must have off- sets in the horizontal plane that are at least 6 feet in depth and 10 feet in length for every 100 feet of frontage.