3 Ways an ADU May Help You Stay on Your Property Longer

Staying on your property does not have to mean staying in the same rooms.

What most people want to keep is the connection to their home, neighborhood, family, and community, while making daily life more practical over time. An Accessory Dwelling Unit, or ADU, can sometimes help make that possible.

An ADU is a separate living space located on the same property as a primary home. Depending on the property and local rules, it may be detached, attached, or created by converting existing space.

They are also far more common than they used to be. ADU permits in California grew from 1,336 in 2016 to 30,354 in 2024, according to the California Department of Housing and Community Development.

If you are thinking about aging in place or multigenerational living, the value of an ADU is often less about adding square footage and more about creating flexibility.

1. Live closer to family without giving up privacy

One of the most common challenges families face is wanting to be closer without wanting to live under the same roof.

An ADU can create a separate home on the same property. That may allow:

• A parent to live near an adult child
• An adult child to live near a parent
• Family members to help one another more easily
• Each household to keep its own kitchen, bathroom, living space, and daily routine
• Families to stay connected without giving up as much independence

For some families, this is a more comfortable option than moving everyone into one house.

It can also make it easier for support to increase gradually over time.

2. Create space for changing care needs

Aging in place often involves needs that change over time.

Someone may be completely independent today but later benefit from more frequent support from family, a caregiver, or another person. About half of adults are either caregivers now or expect to be at some point, according to AARP's 2024 Home and Community Preferences Survey.

An ADU can create options for how that support is provided. Depending on your family's situation, it could be used as:

• A home for a parent
• A home for an adult child who provides support
• Living space for a caregiver
• A flexible space that changes use as your family's needs change

The value is not that an ADU predicts exactly what the future will look like. The value is that it creates another housing option on the property.

3. Use your property differently instead of automatically moving

Sometimes a homeowner begins considering a move because the current house no longer fits the family's needs.

But the issue may not be the property itself. It may be how the property is being used.

For example, a large primary home may be more than one person wants to maintain, while another generation in the family needs more space. In some situations, you might move into the ADU while your adult child's family takes the main house. In others, the ADU gives family members a separate place to live nearby.

An ADU does not make sense for every property or every family. But it can open up possibilities that aren't obvious when the only options on the table are “stay exactly as things are” or “move.”

An ADU is only one possible solution

An ADU is not automatically the answer. Depending on your needs and your property, a better solution may be:

• Modifying the existing home
• Adding a bedroom or bathroom
• Reconfiguring the floor plan
• Creating a Junior ADU, a unit of up to 500 square feet of living space within the existing house
• Building an addition
• Making smaller safety improvements
• Moving to another home

The right solution depends on the people, the property, the budget, and the long-term goals.

Think about the future use, not just the first use

When you are considering an ADU for aging in place or multigenerational living, it helps to think beyond who would live there first.

A well-planned space may serve different purposes over time. For example:

• Today: An adult child lives there.
• Later: A parent moves into the space.
• Later still: A caregiver or another family member uses it.

Thinking this way shapes decisions about the floor plan, accessibility, entrances, bathrooms, storage, privacy, and how the ADU connects to the rest of the property.

Some of those decisions cost little to make at the start. A zero-step entry, a curbless shower, and 36-inch doorways add a modest amount to the original plan. Adding them after the ADU is built means reopening finished work, and that costs significantly more.

The bigger idea is flexibility

An ADU is more than a smaller house in the backyard. For some families, it can be part of a larger plan for how multiple generations live, support one another, and adapt as circumstances change.

The most useful question is not:

“Should I build an ADU?”

It is:

“How do I want this property to support me and my family over time?”

An ADU may be one of the tools that helps make that possible.