The Immersive Virtual Reality (IVR) introduces a new paradigm in the design of spaces and experiences offering possibilities to explore and express ideas in the design process compared to traditional methods. Also, it allows to perceive and analyze the space in real scale through virtual simulation. From this point of view, IVR technology leads us to rethink the teaching methods on design in architecture. This research exposes a pilot study that aims to analyze the advantages and disadvantages of using IVR with Head Mounted Displays (HMD) in the initial stages of architectural design. The design case was an ephemeral recreational space created by first-year architecture students from the National University of San Agustin from Arequipa - Peru. A mixed methodology was applied, considering participatory observations and surveys for participants and evaluators to measure results. It is concluded that the introduction of the IVR in the initial stage of design is a valuable pedagogical tool that allows a better understanding and design of the architectural space, as well as better representing it since the drawing becomes the three-dimensional construction of the space.