Self-consolidating concrete (SCC) is typically proportioned with relatively high contents of cementitious materials and chemical admixtures, leading to relatively high material costs. Such costs can be tolerated in high-value-added applications, especially if cost savings can be realized from using SCC. However, efforts are still needed to reduce material costs for SCC to gain wider acceptance in a variety of applications. In addition to proper material selection and sound mixture proportioning, incorporation of readily available fillers can enable reduction in cement and admixture contents, leading to savings in costs. This paper presents results from an experimental program in which response surface methods were employed to optimize a 4-component concrete containing limestone filler subject to 8 performance criteria.