What is another term for a building plan?

A building plan is commonly referred to as a blueprint. This term originates from the traditional method of creating architectural plans using a light-sensitive paper that produces a white line on a blue background. Blueprints serve as detailed representations of the building's design, including dimensions, materials, and construction methods. They communicate essential information to architects, builders, and engineers involved in the construction process.

While other terms like model, diagram, and draft are related to design and planning, they carry different meanings and functions in the context of architecture. A model typically refers to a three-dimensional representation of a structure, while a diagram is a simplified drawing that may not provide all the details seen in a blueprint. A draft usually represents an initial or preliminary version of a document but may not have the precision and detail unique to blueprints used in construction. Thus, "blueprint" is the most accurate and recognized term for a comprehensive building plan.