If a definition of a tall timber building exists, it would be the combined part of the definitions of tall buildings and timber buildings, which results in:Tall timber building is a building of which most of the engineered parts constitute out of timber products, that is constructed according to modern requirements and in which the effects of the lateral loads is reflected in the structural design.The influence factors on the height of a tall timber building were determined within a problem analysis. The main factors are part of architectural requirements, structural issues, fire safety and building physics. In this thesis the influence factors are quantified to achieve the highest potential, within realistic limits.The combination of the confusion associated with many variables making up the design of a tall building, and the limited experience with tall timber buildings create a void of understanding what can be achieved with wood based materials. Therefore the height limit of tall timber buildings is not established proportionally compared to other building materials.The first objective of this thesis is to determine which factors influence the height of timber buildings. The second objective of this thesis is to verify the structural feasibility of a timber office building of 100m high, with acceptable architectural performance, within a reasonable set of conditions.