Abstract
This research aims to develop a computational approach for visual assessment of built form reducing interventional subjectivity. Such an approach is supposed to serve as an accurate practical tool of built form assessment for different purposes, such as legal action and identity preservation. Fractal geometry has dominated the field of visual assessment recently as a computational tool; fractal dimension is the mathematical representation of visual complexity of architecture. Only two-dimensional box counting approaches have been applied and tested in both manual and computerized applications. In this paper, a 3D box counting approach has been developed and manually applied on Robie house, to calculate fractal dimension, comparing it to the previous two-dimensional results for the same building. The results found mathematically and architecturally valid. The developed approach needs to computerization in future for more accuracy.