Why Aren't Baby Boomers Downsizing? How Aging in Place Is Changing the Housing Market

For years, one of the assumptions about America's housing market seemed almost inevitable.

Baby Boomers would get older. Their children would move out. The four-bedroom suburban house would become unnecessarily large. Eventually, millions of older homeowners would sell those properties, purchase smaller homes or condos and release a significant amount of housing inventory for younger generations.

There's just one problem.

A lot of Baby Boomers aren't leaving.

Recent reporting suggests many older Americans are remaining in homes that no longer necessarily fit their current needs because downsizing isn't as financially or practically attractive as it might seem. Other affluent retirees are going even further in the opposite direction—buying larger homes or expanding existing properties to accommodate children, grandchildren and a different vision of retirement.

This isn't merely an interesting generational trend.

It has consequences for housing inventory, affordability and younger buyers trying to find family-sized homes.

Downsizing Sounds Easier Than It Actually Is

On paper, downsizing makes perfect sense.

Imagine a couple whose children have moved out of a four-bedroom house.

They don't need all that space anymore.

Sell the house.

Buy something smaller.

Pocket the difference.

Simple.

Except the actual economics can look very different.

The smaller property they want may still be expensive. A condominium may introduce substantial HOA dues. Homeowners insurance can be costly. Moving itself costs money.

And then there's the home they're leaving.

They may have owned it for decades.

They may owe very little—or nothing—on the mortgage.

They know the neighborhood.

They know the house.

They have friends nearby.

They've already accumulated substantial equity.

Suddenly, moving isn't such an obvious financial victory.

The Mortgage Lock-In Effect Isn't Only About Young Homeowners

We've talked extensively over the last several years about homeowners who don't want to give up historically low mortgage rates.

That affects older homeowners too.

Suppose you've got an extremely low mortgage rate and a relatively small remaining balance.

Now consider selling that property and purchasing another home at today's prices and financing costs.

Even if the new house is physically smaller, the financial improvement may not be nearly as significant as expected.

And homeowners without a mortgage have an even simpler question:

Why take on a new housing payment if I don't need one?

California Makes the Decision Even More Interesting

California adds another wrinkle.

Longtime homeowners may have property-tax situations that are dramatically different from what a newer buyer would experience purchasing the same property today.

California does provide certain homeowners age 55 and older the ability, subject to eligibility requirements, to transfer a property-tax base to another principal residence under Proposition 19.

That can help.

But it doesn't solve every reason someone may choose to remain in their existing home.

The replacement property still needs to exist.

It still needs to be somewhere they want to live.

The complete financial transaction still has to make sense.

And they still have to want to move.

What Happened to the Starter Home?

Here's where this generational story starts affecting younger buyers.

Housing markets need turnover.

A first-time buyer purchases an entry-level property.

That homeowner eventually moves into something larger.

Another household moves again.

Older homeowners eventually downsize.

Properties move through different stages of the market.

But when one part of that chain stops moving, it affects the rest.

California already has an enormous affordability problem.

Only 19% of California households could afford the state's median-priced single-family home during the second quarter of 2026, according to the California Association of Realtors.

The state's median-priced home was $916,750 in that analysis.

For condos and townhomes, affordability was better—but still only 30% of households could afford the $670,000 median-priced property.

Limited turnover among existing homeowners isn't the sole cause of California's housing shortage.

Not remotely.

But it can contribute to an already difficult inventory environment.

Some Boomers Are Actually Buying Bigger Homes

This might be the most surprising part of the story.

Not every retiree wants a smaller house.

The Wall Street Journal recently reported on affluent Baby Boomers doing the opposite: purchasing larger properties or expanding their existing homes.

Why?

Retirement doesn't necessarily mean sitting quietly in a two-bedroom condo.

Some want space for grandchildren.

Some have adult children returning home.

Some want home offices, entertainment areas or guest suites.

Others are thinking about multigenerational living.

That changes what the “retirement house” looks like.

The ADU Could Become the New Downsizing

This is where I think California gets particularly interesting.

Instead of selling the family house, some homeowners may eventually modify it.

That could mean an accessory dwelling unit.

A first-floor bedroom.

A remodeled bathroom.

A multigenerational addition.

Or another renovation designed to make aging in place easier.

The traditional housing cycle says:

Kids leave → parents sell → parents downsize.

The new version may increasingly become:

Kids leave → parents stay → house evolves.

And sometimes the kids come back.

That creates an entirely different housing ecosystem.

Why This Matters to Millennials and Gen X

If you're a younger buyer, this isn't about blaming older homeowners.

People are generally going to make the housing decision that works best for their own family and finances.

You would probably do exactly the same thing.

But understanding the trend helps explain why certain houses remain so difficult to find.

The family home that everybody assumed would eventually come back onto the market may remain occupied for another 10 or 20 years.

That's particularly important in desirable neighborhoods where new construction is limited.

Should Older Homeowners Downsize?

There is no universal answer.

For some households, selling a large property can free substantial equity and reduce maintenance responsibilities.

For others, staying put may be financially superior.

Some may use Proposition 19 to move closer to children while transferring an eligible tax base.

Others may renovate.

Others may add an ADU.

Some may eventually use home equity to modify the existing property for aging in place.

The important point is that downsizing isn't automatically the obvious financial decision people once assumed it was.

What Does This Mean for Homebuyers?

Don't build your home-buying strategy around the idea that a giant wave of existing inventory is inevitably coming.

It might.

Demographics will eventually create turnover.

But predicting exactly when millions of homeowners will decide to sell is extremely difficult.

Instead, evaluate the inventory that actually exists.

That may mean considering condos and townhomes.

Different neighborhoods.

Properties that need renovation.

ADUs or multigenerational properties.

Or simply waiting until the right property appears.

The housing market you wish existed doesn't help you very much.

You have to make decisions in the one that actually does.

Frequently Asked Questions

Why aren't Baby Boomers downsizing?

Reasons can include substantial home equity, low or nonexistent mortgage payments, high replacement-home costs, HOA dues, insurance, moving expenses and a desire to remain near family and established communities.

Are Baby Boomers keeping younger people from buying homes?

It's more complicated than that. Older homeowners remaining in their homes can reduce turnover, but housing affordability is affected by many factors including construction, zoning, interest rates, income, home prices and available inventory.

Can California homeowners transfer their property-tax basis when they move?

Certain homeowners age 55 or older, people with severe disabilities and victims of qualifying disasters may be eligible for property-tax-base transfers under Proposition 19, subject to California requirements.

Are Boomers actually buying larger houses?

Some are. Recent reporting has highlighted affluent retirees purchasing larger homes or expanding existing properties to accommodate family, entertaining and aging-in-place needs.

Could ADUs help older homeowners age in place?

Potentially. An ADU or home modification can create additional space for caregivers, relatives or multigenerational living, subject to local rules, costs and individual circumstances.

The Bottom Line

The giant Boomer downsizing wave has always sounded logical.

But human beings don't make housing decisions based solely on demographics.

They make them based on money, family, comfort and lifestyle.

If you've spent 30 years building equity in a house you love, have a tiny mortgage payment—or no mortgage at all—and discover that the smaller home you thought you'd buy isn't particularly cheap...

Staying put starts looking pretty attractive.

And that's the larger lesson.

One generation's perfectly rational decision to stay home can become another generation's inventory problem.

Mom and Dad aren't moving yet.

And the housing market may have to adjust to that reality.

Why Aren't Baby Boomers Downsizing? The Housing Market Impact

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Why are Baby Boomers staying in their homes instead of downsizing? See how home equity, low mortgage costs and aging in place are affecting housing inventory.