Why homeowners choose this path
Building an ADU for a parent is one of the most common motivations we see that isn't primarily about rental income. It's typically driven by a desire to keep an aging family member nearby, provide support day-to-day, and give them independence and privacy at the same time — all without the household disruption of everyone living under one roof.
Choosing the right unit type for the situation
Accessibility features worth planning for upfront
Retrofitting an ADU for accessibility later is far more expensive than designing it in from the start. Common features homeowners in this situation plan for include a step-free entrance, wider doorways and hallways for potential future mobility aids, a curbless or roll-in shower, lever-style door handles, and adequate lighting throughout. Not every parent will need all of these on day one, but designing with future needs in mind avoids costly retrofits down the road.
Practical considerations beyond the unit itself
- Proximity and sightlines. Some families prioritize being able to see the ADU's entrance from the main house, or install a simple intercom or camera doorbell for peace of mind.
- Utility setup. Decide upfront whether the ADU will share utilities with the main house or have separate metering — this affects both cost and how bills are handled between households.
- Ownership and occupancy expectations. Clarify as a family whether this is a permanent arrangement or a transitional one, since that can shape design decisions like long-term durability of finishes and whether the unit should be designed to also work as a rental down the line.
This is general planning guidance, not medical or legal advice
Every family's caregiving needs are different, and some situations may be better served by professional in-home care, an assisted living facility, or a licensed care provider rather than an ADU. This page describes general design and planning considerations, not a recommendation for your specific family's situation.
Frequently asked questions
It depends on the level of independence and support involved. A detached ADU offers more privacy and separation; an attached ADU keeps your parent closer, which can matter if frequent caregiving support is part of the plan.
Not necessarily required by code in every case, but many families choose to plan ahead for a step-free entrance, wider doorways, and a curbless shower, since retrofitting later is generally more expensive and disruptive than designing these features in from the start.
It can be, especially if budget is the primary constraint or you want your parent very close by. See our JADU vs. full ADU comparison to weigh the tradeoffs against a standalone ADU.