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Designing an ADU for Multigenerational Living

Building an ADU for family? Here’s how to design a space that’s flexible, private, and ready for real-life multigenerational living—without sacrificing style or comfort.


Designing With Family in Mind

Accessory Dwelling Units (ADUs) aren’t just about square footage—they’re about solving real-life challenges. One of the most common reasons Arizona homeowners choose to build an ADU is to support multigenerational living—whether that means aging parents, returning adult children, or extended family who need a place to stay.

Designing an ADU with family in mind means thinking beyond code and cost. It’s about creating a space that feels safe, connected, and livable for people at any stage of life.


Start With Who’s Moving In

Before you dive into plans, ask:
Who will live in the ADU—and what will they need to feel at home?

  • For older adults: Prioritize accessibility, quiet, and privacy.
  • For young adults or couples: Think flexibility, independence, and multi-use spaces.
  • For long-term guests or caregivers: Consider storage, comfort, and shared access to the main house.

Key Design Features to Consider

1. Accessibility Without Sacrificing Style

  • Single-level living with minimal steps
  • Wider doorways and hallway access
  • Walk-in showers with grab bar placement options
  • Lever handles instead of knobs

2. Privacy and Connection

  • Orientation that offers separation from the main house but maintains a sense of togetherness
  • Shared outdoor space or a breezeway to bridge the two homes
  • Private entrances to support autonomy

3. Smart Storage and Shared Resources

  • Add a washer/dryer inside a walk-in closet or bathroom for convenience
  • Use built-in cabinetry to double as pantry, closet, and general storage
  • Plan for a small but complete kitchen with a dining space—even if most meals are shared in the main house

4. Natural Light and Outdoor Living

  • Design with windows, patios, and porch space that face away from the main home to create calm and privacy
  • Sliding or French doors expand the footprint without increasing square footage

Benefits of Multigenerational ADU Living

  • Keeps families close without feeling crowded
  • Offers affordable housing options in a tight market
  • Provides aging-in-place solutions while preserving independence
  • Supports care responsibilities without full cohabitation

More and more families are realizing that thoughtful design can make shared living work beautifully—and ADUs are one of the smartest ways to do it.


PlanHAUS: ADUs That Support Real Life

At PlanHAUS, we design ADUs that do more than meet code—they meet real family needs. Whether you’re planning for parents, adult kids, or a long-term living arrangement, we help you design a space that works today and adapts for tomorrow.


Ready to Plan a Family-First ADU?

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