Because ADUs typically have smaller footprints than primary residences, thoughtful design planning is essential for maximizing usability and comfort. Open layouts, high ceilings, large windows, and multi-functional spaces can help the unit feel larger and more inviting. In West Hills, many homeowners prioritize private entrances, outdoor access, efficient kitchens, and durable finishes when designing ADUs for rental or guest use. Storage planning is also important, especially in smaller units where efficient organization improves daily living. Designers often focus on balancing functionality, aesthetics, and long-term flexibility so the ADU can adapt to changing household needs over time. Careful planning helps create a space that feels comfortable, practical, and visually cohesive.