The boarding house of mid-nineteenth-century America was the default home of the urban working class. For roughly three dollars a week, a resident received a private room, two daily meals, laundry, and a seat at a table shared with twelve strangers who gradually became something close to family. These establishments were not marginal. According to historian Wendy Gamber, whose book The Boarding House in 19th Century America remains the definitive study, between one-third and one-half of all urban residents either ran a boarding house or lived in one.

In Boston in the 1830s, the share of the population living under such arrangements matched that figure. By 1860, the city held 583 licensed boarding establishments. In Philadelphia, roughly one in four houses took in boarders. In New York, boarding houses accounted for a staggering share of available housing from the mid-nineteenth through the mid-twentieth century.

This was not a desperation move. It was the dominant way a working person found shelter. Boarding houses operated on every rung of the economic ladder. There were respectable middle-class houses for clerks and bookkeepers, elegant establishments catering to lawyers and merchants, and working-class houses where longshoremen and brewers crowded four to a room.

There were houses for actors, sailors, medical students, young single women, immigrants, and black workers in the segregated North. In New York in 1869, weekly rates ranged from $2. 50 to $40. There was something for everyone because nearly everyone used them.

The structure was simple and ingenious. A proprietor, usually a woman, usually a widow, rented out rooms in a converted single-family home. Boarders received a private sleeping space, access to shared bathrooms, two meals a day eaten family style, and often laundry and cleaning. Lodging houses provided only rooms without meals.

Rooming houses, which emerged later, were more impersonal. Together these forms created what housing scholars describe as a complete ecosystem of affordable urban living, a layered market where a newcomer with almost nothing could find a dignified place to sleep. The system matched the shape of urban life. America’s population quadrupled over the nineteenth century.

Immigrants arrived in massive numbers, and the Industrial Revolution pulled young men and women from farms into cities where they knew no one. They needed housing immediately, affordably, and without long-term commitment. Most had no savings, no credit, and no interest in signing a lease on an unfurnished apartment. The boarding house solved all of it at once.

You paid a week’s rent, got a bed and dinner that night. If you lost your job, you moved out the next week. Flexibility was the point. The women running these houses were not peripheral figures.

Boarding housekeeping was a major form of female entrepreneurship in an era when a woman could rarely vote or own property outright. One study of nineteenth-century New York State found that women who kept boarders earned between eighteen and twenty-three dollars per boarder annually, often enough to pay the rent on the entire house. This was quiet, informal, enormously important economic power. A related form of cheap housing was the single-room occupancy hotel, or SRO.

These were purpose-built or converted buildings where tenants rented one small room, usually without a private kitchen or bathroom. SROs became the dominant form of cheap housing for single adults by the early twentieth century. By 1950 they made up roughly ten percent of rental housing in some major cities. New York alone had more than 200,000 SRO units.

San Francisco may have had as many as 90,000. For millions of Americans, these were the entry point, the floor, the safety net. The dismantling of this ecosystem came in overlapping waves. The first began in the 1880s with the Progressive Era urban reform movement.

Reformers looked at overcrowded tenements and decided the solution was moral and architectural uniformity. The ideal, articulated by influential housing reformer Lawrence Veiller, was the detached single-family home occupied by a nuclear family. Everything else, in Veiller’s words, had a very bad effect on American life. Boarding houses were reframed as a social and moral problem.

Critics claimed they weakened the family, encouraged promiscuity, enabled vice, and bred disease. The language was moralistic, but the anxiety was about class, immigration, race, and the growing independence of women. Moral disapproval alone could not kill a housing form that served millions. For that, the reformers needed law.

The first comprehensive American zoning code came in New York City in 1916. By the mid-1920s, with the publication of the Standard State Zoning Enabling Act, drafted with Veiller’s involvement, cities across the country adopted zoning laws that protected single-family districts from everything the reformers disliked. Boarding houses, lodging houses, SROs, duplexes, and corner stores were banned from vast swaths of every city. In those zones, one could not legally build a boarding house or subdivide a home to take in tenants.

The second wave came from the federal government. In 1934, the Roosevelt administration created the Federal Housing Administration. Its stated purpose was to revive the construction industry and make home ownership accessible to middle-class families. Its actual effect was to pour federal subsidy into one specific housing type: the detached single-family home in a new suburb.

Between 1934 and 1962, the FHA and the Veterans Administration financed more than $120 billion in new housing. By 1972, the FHA had helped roughly eleven million families buy homes. The underwriting guidelines strongly preferred new suburban single-family houses and disfavored multi-family and older urban structures. The FHA’s manuals institutionalized redlining, refusing to insure mortgages in predominantly black neighborhoods.

Only about two percent of federally backed post-war housing went to non-white families. The federal government placed its enormous weight behind exactly the housing type zoning had already designated as the only acceptable one. By the 1950s, the third wave hit. In 1954, New York City amended its housing maintenance code to prohibit new private SRO construction.

In 1955, the city formally banned new SRO units. That same year it launched a tax abatement program called J51, which paid landlords to convert SRO buildings into market-rate commercial properties. More than 100,000 SRO units were lost in New York under this policy regime. Since 1955, roughly 175,000 SRO units have been eliminated from the city.

New York went from about 200,000 SROs in 1950 to around 19,000 by the early twenty-first century. Other cities followed the same arc. Chicago lost 81 percent of its SRO stock between 1960 and 1980. San Francisco estimated 40,000 residential hotel rooms were destroyed by urban renewal, with more than 6,000 lost in a single five-year span.

Its redevelopment agency leader, Justin Herman, notoriously said the land was too valuable to permit poor people to park on it. Seattle lost half its downtown SRO stock, 16,200 units, between 1960 and 1973. Minneapolis bulldozed its entire Gateway District, the city’s main SRO neighborhood, in the nation’s first federally funded urban renewal project. Boston’s SRO stock dropped from 35,000 units in the early 1950s to 9,500 by 1968.

Nationwide, researchers estimate that nearly one million SRO units were eliminated between 1955 and 2013. In the decade after 1973 alone, 4. 5 million housing units were removed from the American stock, roughly half occupied by low-income households. This was not the invisible hand of the market.

Urban renewal programs, backed by billions in federal dollars through the Housing Act of 1949, explicitly targeted the neighborhoods where SROs and cheap lodging houses were concentrated. The buildings were condemned, residents scattered, and land handed to private developers for convention centers, luxury hotels, and office towers. What disappeared was not just housing but social infrastructure. Neighborhoods like Manhattan’s Bowery, Boston’s Scollay Square, and San Francisco’s South of Market had cheap diners, informal labor markets, and small institutions that kept people on the margins fed and connected to work.

The consequences arrived in the 1980s. With the SRO stock gutted, zoning making cheap shared housing illegal, federal housing subsidies cut to a fraction of their earlier level, and the deinstitutionalization of psychiatric hospitals pushing mentally ill Americans into communities with nothing left to catch them, mass homelessness erupted. According to social scientist Christopher Jencks, the homeless population grew from roughly 100,000 in 1980 to about 400,000 by 1987 and 1988. In the 1970s, there had actually been more flophouse rooms than people who needed them.

By the early 1980s, the demand for cheap single rooms exceeded the shrunken supply. The forces that destroyed the boarding house are still shaping American cities. Most land in most metropolitan areas remains zoned exclusively for single-family homes, often more than seventy percent of residential land. Building anything denser or cheaper is literally illegal across most residentially zoned terrain.

The lowest rungs of the housing ladder were removed by law. Suburban homeowners won because restrictive zoning protected their property values. Developers won because prime land was handed to them through urban renewal. Local governments won because luxury conversions generated more tax revenue.

Working people lost their most affordable option. Immigrants lost a dignified entry point. Women lost one of the few paths to independent income. The elderly lost the ability to age in place.

The mentally ill lost the loose network that had absorbed them. Hundreds of thousands lost housing of any kind. A slow reckoning has begun. In 2024, Washington State passed a law requiring cities to permit single-room occupancy and co-living housing in multi-family zones.

The Institute for Justice has drafted model legislation to reduce zoning barriers to low-cost shared housing. Philadelphia has moved to legalize single-room residences. Boston is studying whether SROs could ease its housing crunch. A non-profit in Los Angeles has created dwellings for over 2,000 formerly homeless people in former residential hotels.

But reversing a century of policy remains slow. Every proposal faces fierce opposition from homeowners who repeat the same language the Progressive reformers used in the 1890s. The infrastructure of exclusion is still in place. The bedroom that cost three dollars a week was not eliminated by accident or by natural market evolution.

It was prohibited by a century of deliberate legal and financial choices. The cost of those choices is still being paid every month.