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This paper presents a methodology for scaling and modifying ground motions that best represents the seismic-hazard characteristics of the site, minimizes the amplification and modification to the records and uses the minimum number of ground motions required while still meeting all the code requirements. The objective of the ground-motion modification method is to scale and modify the ground motions such that the average of the spectrum resultants matches the scaled design spectrum over the entire period range of the design spectrum. This method reduces the groundmotion amplification needed to meet the code requirements when amplitude scaling is implemented. It also reduces the record modification needed for spectral matching. The proposed methodology was used in generating the ground motions used for the design of a hospital expansion project. The implementation of this methodology and its effects on the design are presented in the paper.