The aging sector has two priority problems that get funded almost entirely separately. One is housing instability. The other is social isolation. The most efficient investment in the field may be the one that treats them as what they actually are: the same problem.
If you follow the field closely, you have seen the same convergence of data from multiple directions. The RRF Foundation for Aging identifies safe and affordable housing and isolation and loneliness as two of its four core grantmaking priorities. Grantmakers in Aging has called for scaling collaborations and named housing stability as a central focus of its funder collaborative. LeadingAge documents the evidence base for community-based models that address both. The AARP Public Policy Institute tracks the growth of older adult homelessness and the inadequacy of the current policy response.
The research is consistent. The funding is categorical. And the result, in many communities, is that the same person falls through the gap between two different grant programs, both of which are trying to help them.
The Housing Crisis That Is Not in the Headlines
1 in 5 people experiencing homelessness in America is an older adult, according to 2024 data from the RRF Foundation for Aging. That figure has grown steadily and is projected to continue growing as a large generation ages into fixed incomes and the cost of housing continues to outpace those incomes.
But homelessness is the end of the pipeline, not the beginning. The beginning is housing insecurity, a condition that is quieter and less visible but far more common. It is the homeowner who can no longer afford property taxes on a fixed income. The widow whose Social Security check now covers rent but very little else. The renter whose landlord sells the building. These are the people who fall gradually, not suddenly, into housing crisis.
The policy response to this crisis is largely institutional: subsidized senior housing, adult foster care, nursing facilities. These are important resources. They are also expensive, capacity-constrained, and, for many older adults, deeply undesirable. Most older adults want to age in place. The systems available to support that preference were not built to address both their economic and social needs at the same scale.
The Isolation Crisis That Is Not in the Housing Conversation
Social isolation among older adults is a public health problem of documented severity. Research links chronic isolation to cognitive decline, increased hospitalization, and earlier entry into institutional care. The U.S. Surgeon General has named loneliness and isolation a public health epidemic, noting health consequences comparable to smoking 15 cigarettes per day.
The policy and philanthropic response to this crisis tends to run through health channels: transportation programs, telehealth, social engagement funding, community health worker initiatives. These are valuable. What they rarely touch is the structural condition that creates isolation in the first place, which is, in many cases, that an older adult lives alone in a home designed for a family, with no natural mechanism for human connection built into daily life.
Housing instability and social isolation are not two separate problems. For most older adults experiencing them, they are two symptoms of the same underlying condition: a system that has not given them a way to stay in their homes and remain connected to their communities at the same time.
The One Intervention That Addresses Both
Home sharing is not a new idea. What is new is the moment, and what is new is the availability of the infrastructure to bring it to scale.
A well-run home sharing program addresses housing instability directly: the homeowner generates supplemental income that may be the difference between staying and losing the home. The home seeker gains stable, affordable housing outside of a strained and expensive rental market. Both outcomes are documented, measurable, and fundable on their own terms.
But the second-order outcomes are equally significant. Both parties gain a built-in community. Research on home sharing programs consistently documents reductions in loneliness and isolation. The homeowner, who may have lived alone for years, has someone in the kitchen. The home seeker, who may have been navigating housing instability in isolation, has a stable address and a neighbor. These are not soft outcomes. They are health outcomes with documented downstream effects on hospitalization rates, cognitive health, and quality of life.
The same match. Two problems addressed. One investment.
What Your Investment Actually Funds
Home sharing, unlike most housing interventions, does not require ongoing public subsidy. The homeowner provides the space. The home seeker's rent provides income to the homeowner. The arrangement is financially self-sustaining.
What requires investment is the infrastructure that makes responsible home sharing possible at scale: the technology platform for intake, compatibility matching, and case management; the trained staff who support matches and navigate the inevitable frictions of shared living; the organizational capacity to run a program that satisfies the accountability requirements of city partners and the trust requirements of older adults and their families.
A philanthropic investment in home sharing infrastructure is not funding a program that runs as long as the grant does. It is funding the organizational capacity that allows a mission-driven program to keep running, keep growing, and keep generating outcomes long after the initial grant cycle ends.
That is a different kind of ROI than most program grants produce. It is also, for funders who care about durability and scale, a more compelling one.
The Opportunity the Sector Has Not Fully Taken
Grantmakers in Aging has explicitly called for scaling collaborations and bringing proven models to new localities. The RRF Foundation for Aging funds both housing and isolation as parallel priorities. The question worth asking is whether the most efficient version of that grantmaking funds the intervention that addresses them together, rather than separately.
Home sharing is that intervention. The organizations doing it well have demonstrated outcomes. The infrastructure to support it is available. The policy environment is shifting toward it. What the sector needs now is funders willing to treat home sharing as the dual-purpose, scalable, self-sustaining housing and social connection strategy it actually is.
Your investment in home sharing infrastructure is an investment in both of your priority problems at once. That is not a coincidence. It is the point.