Ground reinforcement methods such as stone columns, jet grouting, and soil mixing are commonly used to improve subsoil conditions for seismic mitigation. The purpose of this improvement is usually for foundation support and/or liquefaction mitigation. Additional benefits, such as a possible reduction in seismic ground motions, are not considered in NEHRP/IBC code provisions. This paper summarizes results from parametric dynamic 3-D finite element analyses of soil-mix reinforced ground. The results suggest that stiff ground reinforcements arranged in lattice-type soil-mix panels may significantly reduce ground motions and improve NEHRP/IBC Site Classification. Moreover, the cost of the soil improvement may be more than offset by the lower construction cost resulting from lower design motions and a more favorable site classification. Additional research is needed to provide detailed insight.