Program grants fund outcomes. Infrastructure grants fund the capacity that makes outcomes possible everywhere. In housing and aging services, the field has historically been better at the first than the second. Home sharing is where the gap shows up most clearly.
The math behind housing for older adults is not complicated. Institutional care costs between $54,000 and $108,000 per year depending on level of care. Home health aide services average $30,000 to $50,000 annually. Memory care in a nursing facility averages over $100,000 per year.
Home sharing costs, in direct public subsidy, essentially nothing. The homeowner provides the space. The home seeker provides income to the homeowner. The arrangement is market-funded and self-sustaining by design.
The fiscal case is as strong as the human one. And yet home sharing remains dramatically underutilized in the national housing policy conversation. The question worth asking is: why?
The Obstacle Has Never Been Demand
John Burns Research and Consulting estimates that there are 44 million empty bedrooms in American homes. The vast majority are in the homes of older adults who are asset-rich in square footage and often cash-constrained in everything else. Surveys of older homeowners consistently document real interest in home sharing when it is presented as a supported, well-matched arrangement rather than a do-it-yourself rental.
On the other side of the equation, housing seekers are navigating a rental market that has become increasingly unaffordable across virtually every American metropolitan area. Home sharing offers stable, affordable housing with a built-in community. Demand is not the problem.
The problem is that running a home sharing program responsibly is operationally demanding in ways that most organizations cannot absorb without dedicated infrastructure. Careful compatibility matching. Structured intake and vetting. Ongoing case management support. Data systems that satisfy the accountability requirements of city partners and institutional funders. Trained staff who can support matches through the inevitable complexity of shared living.
Most home sharing programs in the country are small not because demand is small, but because they were built on improvised tools and without the organizational infrastructure to grow. The bottleneck is capacity, not need.
The Difference Between Funding a Program and Funding Infrastructure
Program Funding
Funds a specific number of matches in a specific time period. Outcomes are defined by the grant cycle. The program ends or shrinks when the grant does. Replication requires the next organization to start over.
Infrastructure Funding
Funds the capacity that makes any number of matches possible, now and into the future. Outcomes compound over time. The program continues and grows after the grant cycle ends. Replication becomes a choice, not a construction project.
The distinction is not academic. In housing and aging services, infrastructure grants are consistently harder to secure than program grants. Funders naturally want to fund outcomes: matches made, people housed, lives stabilized. The connection between those outcomes and the organizational capacity required to produce them at scale is less visible and therefore less funded.
Home sharing is a particularly sharp example of this dynamic. The outcomes are compelling: housing stability, reduced isolation, supplemental income for homeowners, affordable housing for seekers. The outcomes are also entirely dependent on the quality of the matching and support infrastructure behind them. A failed match, one that was rushed, poorly assessed, or unsupported when friction arose, does not just end a housing arrangement. It sets back the cause and confirms fears that were already holding people back.
What Home Sharing Infrastructure Actually Produces
The right infrastructure investment in a home sharing organization does several things that program funding cannot do on its own. It builds matching capacity that produces better matches over time, because the organization learns from its data. It builds case management depth that supports matches through complexity rather than abandoning them when problems arise. It builds reporting and accountability systems that make the program credible to the city partners and institutional funders whose investment is required for the program to reach scale.
And it builds something that is harder to name but equally important: organizational credibility. An organization that can demonstrate consistent outcomes across hundreds of matches, track those outcomes longitudinally, and report them in terms that funders and city partners recognize is a fundamentally different proposition than an organization running good programs on improvised systems. The first can grow. The second is perpetually limited by the capacity of its workarounds.
The Multiplier Effect of Getting In Early
Home sharing is at an inflection point in the national policy conversation. Cities are naming Qualified Home Sharing Providers. The AARP has increased its advocacy for home sharing as a mainstream aging-in-place strategy. Grantmakers in Aging has identified it explicitly within its housing stability work. The policy tailwind is building.
Organizations that invest in home sharing infrastructure now, before the policy wave fully arrives, are investing in something whose value compounds with each policy shift in that direction. Every city that formally commits to home sharing creates demand for organizations with credible programs and proven outcomes. Every funder that moves home sharing from the margins of the housing conversation to the center creates opportunities for organizations that are already positioned to respond.
Infrastructure investment at this moment is not just an investment in what home sharing is today. It is an investment in what it is about to become, and in the organizations that will be ready to deliver on it when the field catches up to the need.
The Honest Case
We are building the national nonprofit infrastructure for home sharing. That means building the platform, the organizational capacity, the partner network, and the replicable model that allows home sharing to go anywhere. It means treating home sharing not as a regional program but as a civic intervention that belongs in any community willing to invest in the infrastructure to do it right.
A philanthropic investment in that infrastructure is not a grant that funds outcomes in a single community during a single grant cycle. It is an investment in the capacity that makes home sharing possible at scale, for the communities that need it most, for as long as people need places to stay and homes need people in them.
That is the gift that compounds.