What do you use as a starting point when laying out a building?

In the context of laying out a building, a benchmark serves as a critical reference point that establishes an elevation level for construction. A benchmark is typically a known point in the environment that provides a consistent starting elevation from which all measurements can be made. It allows builders to ensure that the structure is level and that all subsequent points and lines are accurately referenced from a recognizable and stable height. This accuracy is essential for ensuring structural integrity and proper drainage away from the building. By starting with a benchmark, builders can reliably set foundations, walls, and other critical components of the structure in alignment with the planned design specifications. This ensures consistency throughout the building process, leading to a more accurate and stable final product.