What term describes documents that outline the building plans?

The correct choice is blueprints, which are detailed architectural drawings that visually represent the building plans. Blueprints typically include various views of the structure, floor plans, elevations, and details about construction methods. They serve as a crucial tool for architects, builders, and contractors as they guide the actual construction process and ensure that the project aligns with the intended design.

Specifications, on the other hand, complement blueprints by providing detailed information about the materials, products, and workmanship required for the construction project. While they are critical to the overall building process, they do not directly outline the building plans in the manner that blueprints do. Contracts relate to the legal agreement between parties involved in a transaction but do not depict the physical design of a building. Regulations refer to the local codes and laws governing construction, ensuring safety and compliance, but again, they do not outline the building plans themselves.