As built modeling refers to the process of creating a detailed 3D model of a building or structure based on its current physical condition. This type of modeling is typically used in the construction industry, and is often used to create accurate and detailed records of a building's layout, features, and systems.

The process of creating an as built model typically begins with a thorough survey of the building. This may include taking measurements and photographs of the building's interior and exterior, as well as creating detailed floor plans and elevations. Once this data has been collected, it is then used to create a 3D model of the building using software such as AutoCAD or Revit.