Planned unit development zoning is also termed

Buffer zoning refers to the practice of using transitional areas to separate different land uses, such as residential from commercial zones, to minimize conflicts. It does not encapsulate the principles of planned unit development, which aims for integrated development rather than separation.

Downzoning involves changing a zoning classification to allow for fewer or less intensive uses of land, often to preserve the character of a neighborhood or limit development. This is contrary to the objectives of planned unit development, which encourages higher density and diverse land uses.

Exclusionary zoning is a practice that limits certain types of housing or land uses to exclude specific populations, often leading to socioeconomic segregation. This is fundamentally opposed to the inclusive nature of planned unit developments, which seek to create diverse and integrated communities.