Because they are familiar with the original requirements, built drawings are often created by the architects and engineers who planned the project. As a result, they are the most appropriate choice for documenting the modifications that occurred throughout construction. The as-builts drawings should reflect the actual conditions of the building at any given time during construction. For this reason, third-party contractors and other sub-contractors may create their own as-built drawings. These documents are useful when requesting payment from the owner or lender because they provide evidence that certain work was performed under specific conditions. Additionally, if there is a change in plans during construction, new as-built drawings can be generated to reflect these alterations. When preparing as-built drawings, it is important to distinguish between changes that affect only one area of the building and those that require renovation of an entire section. Work such as adding rooms to a house or replacing windows and doors can be documented on individual sheets, while major renovations that involve the demolition and reconstruction of large portions of a building require more extensive drawings. The quality of the as-built drawing depends on how much detail is included; therefore, try not to skip any steps! Finally, keep in mind that as-built drawings are merely a snapshot in time.