Autism and sensory-friendly events are an increasingly common feature of community life. One predictable aspect of these events is the presence of sensory havens, which serve as a respite or self-regulation zone for neurodiverse children, family, friends, and, occasionally, their service animals. When research evidence contributes to the design of these spaces, they can positively impact the length of time people attend events and the quality of their experiences. The authors detail autism architecture guidelines and sensory regulation research, and provide practical strategies for designing and operating havens.