Reinforced concrete (RC) single and coupled shear walls are widely used lateral force-resisting systems in earthquake-resistant buildings. However, the effects of different boundary element configurations on their seismic performance, collapse capacity, and seismic design factors have not been fully assessed within the FEMA P695 framework. This study investigates the influence of boundary element configurations on RC single and coupled shear walls and evaluates the adequacy of the response modification factor (R), deflection amplification factor (Cd), and overstrength factor (Ω₀). Twenty-four archetype buildings with 5-, 10-, and 15-story heights were designed and analyzed, including planar walls, dumbbell-shaped walls, walls with steel box boundary elements, and corresponding coupled wall systems with reinforced concrete and steel shear coupling beams. Nonlinear fiber-based models were developed in OpenSees, followed by nonlinear static (pushover) and Incremental Dynamic Analyses (IDA) using the ground motions specified by FEMA P695. Collapse capacity and FEMA P695 acceptance criteria were subsequently evaluated. The results show that changes in boundary element configuration, particularly the use of steel box boundary elements, can improve seismic performance, ductility, and collapse capacity. The type of coupling beam also has a noticeable influence on the seismic response and performance of coupled wall systems. Finally, the proposed seismic design factors were assessed against the FEMA P695 acceptance criteria. The findings provide a basis for assessing the seismic adequacy of RC single and coupled shear wall systems and may contribute to the refinement of seismic design provisions for such systems.