Sonic boom prediction around buildings has previously been conducted under the assumption of linear wave propagation. In this work, a more detailed analysis considering the nonlinear effect is achieved by means of computational fluid dynamics (CFD). The two-dimensional Euler equations are solved by employing a level set method for tracking a moving supersonic body, a ghost fluid method for applying the immersed boundary condition at the surface of the body, and an adaptive mesh refinement method. Simulations are made under the frame of reference of a flight object moving at Mach 1.6. Incident waves are composed of a single oblique shock wave, as well as N, flat-top, and ramp waves. The computational results clarify the complex flow behaviors around a building, involving the incident, reflected, and diffracted waves. At the bottom-front edge of a building, the waveform behind the shock waves is spiked, and the pressure rise is amplified due to double reflections. The diffracted waves are repeatedly reflected at the top corners of a building, resulting in amplification of the perceived level over a wide range. The results of this work demonstrate that CFD can provide more detailed information compared to previous approaches and can be deployed for practical applications. [ABSTRACT FROM AUTHOR]