- Backlit. Illuminated internally or from the inside.
- Bay window. A window projecting outward from the main wall of a building.
- Berm. A raised form of earth to provide screening or to improve the aesthetic character.
- Bollard. A vertical, freestanding, short post used as a barrier to vehicles.
- Bracket. A support element under overhangs; often more decorative than functional.
- Bicycle facilities. A general term used to describe all types of bicycle-related infrastructure, including linear bikeways and other provisions to accommodate or encourage bicycling, such as bicycle racks and lockers, bikeways, and showers at employment destinations. On- and off-street spaces delineated for safe use by bicycles, designated in one of four classes:
- Class I (shared use or bike path). A bikeway physically separated from any street or highway. Shared Use Paths may also be used by pedestrians, skaters, wheelchair users, joggers, and other non-motorized users.
- Class II (bike lane). A portion of roadway that has been designated by striping, signaling, and pavement markings for the preferential or exclusive use of bicyclists.
- Class III (bike route). A generic term for any road, street, path, or way that in some manner is specifically designated for bicycle travel regardless of whether such facilities are designated for the exclusive use of bicycles, or are to be shared with other transportation modes.
- Class IV (cycle track or separated bikeway). A bikeway for the exclusive use of bicycles and includes a required separation between the bikeway and the through vehicular traffic. The separation may include, but is not limited to, grade separation, flexible posts, inflexible posts, inflexible barriers, or on-street parking.
- Bikeway. A generic term for any road, street, or path that is designed for bicycle travel, regardless of whether it is designated for the exclusive use of bicycles or is to be shared with other transportation modes. A bikeway network refers collectively to all types of bikeways and facilities.
- Buffer / buffer zone. An area of land, structure, feature, or design treatment separating two uses that acts to soften or mitigate the effects of one use on the other
- Building envelope. The three dimensional space within which a structure is permitted to be built on a lot. This space is defined with respect to such development regulations as height, setback requirements, floor area ratio, lot coverage, and intensity standards.
- Business Improvement District (BID). A a type of special assessment district in which business owners collectively choose to be assessed, with the proceeds then used by local business organizations to improve and promote the business district.