To reduce the processing cost of the single grain REBCO (RE: Rare-earth elements) bulk superconductors, a cost-effective process should be developed. One possible way of developing the cost-effective process is the use of low-cost precursor powders. In this study, the single grain YBCO superconductors were fabricated using a home made powder. YBa₂Cu₃O_7-y_(Y123) powders were synthesized at 850-900℃ in air by the powder calcination method with repeated crushing and heat treatment steps. The processing parameters for the fabrication of single grain Y123 bulk superconductors, T_max_ (maximum temperature), T_p_ (peritectic temperature) and a cooling rate through T_p_ were optimized. To enhance the flux pinning capacity of the single grain Y123 samples, Y₂BaCuO₅ (Y211) particles were dispersed in the Y123 matrix by adding Y₂O₃powder to the calcined Y123 powder. Applying the optimized processing condition, the single grain Y123 superconductors with T_c_=91K and Jc=1.5×10⁴A/㎠ at 2 T were successfully fabricated using a home made powder. The levitation forces and trapped magnetic field at 77 K measured using a Nd-B-Fe permanent magnet of 5300 G were 47 N and 3000 G, respectively, which are comparable to those obtained for the samples fabricated using a commercial grade Y123 powders.