What actually works: Housing First and the evidence

If you read about homelessness for long you will keep running into the phrase Housing First. It is the most studied, most evaluated, and most consistently effective approach to chronic homelessness in existence. It is also widely misunderstood. This article explains what it is, what the evidence says, and what it is not.

What Housing First is

Housing First means giving someone a permanent home — a real apartment, with a lease, in the community — without first requiring them to get clean, get a job, or comply with treatment. Support services (case management, mental health, substance use treatment) are offered but voluntary. The housing is not contingent on participating.

This is the opposite of the "staircase" model that dominated American homelessness policy for decades, in which a person had to first complete detox, then move to a transitional shelter, then to a halfway house, then to subsidized housing — and any relapse sent them back to the bottom of the stairs. The staircase model assumes that people need to "earn" housing by proving stability. Housing First assumes that stability is impossible without housing.

The evidence

Hundreds of studies have evaluated Housing First programs. The consistent findings:

• Housing retention rates of 80–90% at 12 and 24 months, compared with 30–50% for treatment-first programs.
• Reductions in emergency room visits and hospitalizations in the range of 30–60%.
• Reductions in jail bookings in the same range.
• Substantial cost savings — multiple studies in cities including Denver, Seattle, and Toronto have found that the cost of housing a chronically homeless person is less than the public cost of leaving them on the street, once you account for emergency room visits, ambulance rides, police calls, jail days, and detox admissions.
• Modest but real reductions in substance use — and importantly, not the increase that critics predicted when people are housed without sobriety requirements.

The largest single study is the Canadian government's At Home / Chez Soi study, which followed 2,148 chronically homeless people with mental illness across five Canadian cities. The Housing First group spent dramatically more time housed and had better outcomes across nearly every dimension measured.

Why "Housing First, then everything else" outperforms "treatment first"

It turns out to be much harder to address mental illness, substance use, or chronic medical conditions when you are sleeping outside. Sleep deprivation makes psychiatric symptoms worse. Trauma from the streets makes treatment harder. Showing up to a clinic appointment when you have nowhere to store your possessions, no shower, no clean clothes, and no reliable address is nearly impossible. Get someone into a safe home and the conditions for everything else to improve are finally in place.

What Housing First is not

• It is not "free apartments with no strings." The lease is real. People can be evicted for the same reasons as any other tenant.
• It is not a substitute for treatment. Treatment is offered and is usually accepted — just voluntarily.
• It is not the same as "harm reduction." Harm reduction is a strategy for reducing the dangers of substance use; Housing First is a strategy for housing. They often appear together, but they are different things.
• It is not a universal solution. Housing First is specifically designed for chronically homeless people with disabling conditions. For transitional homelessness (the 80% of cases that are short and not associated with chronic disability), rapid rehousing — a few months of rent subsidy — is more cost-effective.

What else works

For each population, the evidence points to slightly different things:

• Transitional homelessness: rapid rehousing (short rent subsidy + housing search help), eviction prevention, emergency cash assistance to head off a crisis before it becomes homelessness.
• Family homelessness: rapid rehousing, child-care subsidies, domestic violence services where applicable.
• Veteran homelessness: HUD-VASH (the VA's flagship voucher program) is essentially Housing First with VA case management. It has been responsible for the largest sustained reduction in any subpopulation's homelessness in US history.
• Youth homelessness: family reunification where safe, host homes, drop-in centers, transitional housing for youth with skill-building.
• Chronic homelessness: Housing First plus voluntary supportive services.

What does not work, or works poorly

• Criminalization. Citing or arresting people for sleeping outside has no effect on homelessness rates and adds criminal records that make future housing harder to get.
• One-way bus tickets ("Greyhound therapy"). Sending people to another city does not reduce homelessness, it just relocates it — and frequently leaves people more isolated.
• Treatment-first / staircase models. Decades of evidence show that requiring sobriety or treatment compliance before housing produces dramatically worse outcomes than offering housing first.
• Encampment sweeps without housing offers. They scatter people, destroy their belongings (including IDs and medications), and increase the cost and difficulty of eventually housing them.

What this means for you

If you are choosing where to donate, prioritize organizations that:

1. Provide or fund permanent housing — not just shelter.
2. Use Housing First as their model.
3. Don't require sobriety, religious participation, or treatment compliance as a precondition for housing.
4. Track and publish outcomes — including how many people they housed and how many were still housed a year later.

Programs that meet these criteria, at scale, are how homelessness is actually reduced.