2025 ADU Design Trends: Sustainable, Stylish & Space‑Saving

In 2025, accessory dwelling units are showcasing sustainable materials and energy efficiency. Homeowners are adopting eco‑friendly design elements like reclaimed wood, low‑VOC finishes, high‑efficiency appliances, solar‑ready roofs and rainwater‑collection systems.

Space‑saving layouts and multifunctional rooms are popular, with open‑plan living areas, built‑in storage and furniture such as Murphy beds and wall‑mounted shelving. These clever features maximize small footprints while providing comfortable and flexible spaces that can be used as guest suites, offices or studios.

Indoor‑outdoor living is also trending. Large sliding doors, decks, patios and rooftop terraces expand the usable living area and bring in abundant natural light. Designers favor natural wood finishes, earth‑tone palettes and abundant windows to create a warm, cohesive connection with the main house and surrounding landscape.

Other design touches include smart‑home technology, accessibility features for multigenerational living, and modular or prefab construction techniques that reduce waste and shorten build times. In 2025, ADUs blend style, sustainability and versatility, making them attractive additions for homeowners and renters alike.