Imagine an American city in the 1850s. The streets pulse with horse-drawn carriages, coal smoke, and the cries of newspaper boys. Sidewalks teem with workers moving between factories, offices, and markets. Now step inside one of the three-story brick houses lining the block. Climb a creaking wooden staircase. Smell the pot roast simmering downstairs. Push open the door to a modest room with a small bed, a washbasin, a desk, and a window facing the street. For roughly $3 a week, this is your home—rent includes breakfast, dinner, laundry, and a landlady who treats you like a stepson.

This is a boarding house. And at this moment in American history, somewhere between a third and half of every urban resident either lives in one or runs one. According to historian Wendy Gamber, whose book The Boarding House in 19th Century America remains the definitive study, this was not a fringe arrangement. In Boston in the 1830s, between a third and half of the city’s entire population lived in a boardinghouse. By 1860, Boston alone had 583 licensed boarding establishments. In Philadelphia, roughly one in four houses took in boarders. In New York, boardinghouses accounted for a staggering share of all available housing stock. For the better part of a century, this was the dominant way a working person in America found a place to sleep.

And then, it vanished. Not slowly, not gently, not because the market decided boarding houses were obsolete. The entire category of cheap, dignified, flexible, shared urban housing was systematically dismantled by zoning laws, building codes, tax policy, federal subsidies, and cultural pressure, all stacked together over the course of about 70 years. By the time the dust settled, somewhere around 1 million single-room occupancy units had been eliminated from American cities. The housing ladder had its bottom rungs sawed off.

The consequences of that erasure are still rippling through every expensive, overcrowded, housing-starved American metropolis today. This is the story of the cheap boarding house—what it was, why it worked, and why the people in power spent decades making sure it would never come back.

To understand what was lost, you have to understand what boarding houses actually were. The modern imagination tends to picture a tenement slum or a creaky horror movie manor. The reality was far more varied. In the mid-19th century, boarding houses existed on every rung of the economic ladder. There were respectable middle-class establishments where young clerks in starched collars took their meals alongside widowed matrons. There were elegant houses for visiting lawyers and merchants, with silver in the dining room and a piano in the parlor. There were working-class houses where Irish longshoremen or German brewers crammed four to a room and ate stew by lantern light. There were houses for actors, sailors, vegetarians, medical students, marriageable young women, Chinese laborers, Jewish immigrants, black workers in the segregated North—and, according to one 1857 guidebook, even boarding houses where you were expected to flirt with the landlady.

In New York in 1869, the cost of living in a boarding house ranged from $2.50 a week on the low end to $40 a week on the high end. There was something for everyone because almost everyone used them. The structure was simple and ingenious. A proprietor—usually a woman, usually a widow, usually running the operation out of a converted single-family home—would rent out individual rooms to tenants. In exchange for a weekly fee, boarders received a private sleeping space, access to shared bathrooms, two meals a day served family style in a common dining room, and often laundry, cleaning, and a watchful eye on the comings and goings of residents. Together with lodging houses and rooming houses, they formed what housing scholars now describe as a complete ecosystem of affordable urban living—a layered market where a newcomer with almost nothing could still find a dignified place to sleep, and a working person could save up over time toward something more permanent.

Why did this work so well? Because it matched the actual shape of urban life. 19th-century America was in the middle of an explosion. The population quadrupled over the course of the century. Immigrants poured off ships at a rate that strained every existing social structure. The Industrial Revolution yanked young men and women out of the countryside and dropped them into cities where they knew no one. They needed somewhere to live immediately, affordably, and without a long-term commitment. Most had no savings, no credit, no family nearby, and no interest in signing a year-long lease on an empty apartment they could not afford to furnish. The boarding house solved all of that in one stroke. You showed up, you paid a week’s rent, you got a bed and dinner that night. If you lost your job, you moved out the next week. If you got a better job, you moved up to a nicer house across town. Flexibility was the point. Affordability was the point. Community was the point.

And the women running these houses were not peripheral figures. They were, in many cases, the first large wave of female entrepreneurs in American urban history. Boarding housekeeping was, as Wendy Gamber put it, women’s work. Landladies, not their husbands, met prospective tenants, collected rent, enforced house rules, planned menus, hired servants, and presided over the dinner table every single night. In an era when a woman could not vote, could rarely own property outright in her own name in many states, and had almost no respectable path to earning real money, running a boarding house was one of the only ways a widow or single woman could support herself and her children without becoming a domestic servant or a mill worker. One study of 19th-century New York State found that women who kept boarders earned between $18 and $23 per boarder annually—often enough to pay the rent on the entire house with margin to spare. This was quiet, informal, enormously important economic power. And every single one of those women lost that income stream when boarding houses were later legislated out of existence.

Now, layer on top of this another form of cheap housing that often gets confused with boarding houses but was actually distinct: the single-room occupancy hotel, usually shortened to SRO. Where boarding houses typically operated in converted private homes with meals included, SROs were purpose-built or converted hotels, apartment buildings, and commercial structures where a tenant rented one small room, usually without a private kitchen or bathroom, with communal facilities down the hall. SROs emerged in significant numbers in the late 19th century and became the dominant form of cheap single adult housing by the early 20th century. By 1950, SROs made up roughly 10% of all rental housing in some major American cities. New York City alone had more than 200,000 SRO units at that peak. San Francisco, according to historian Paul Groth, may have had as many as 90,000 SRO rooms at the start of the 1930s. These were not fringe accommodations. For millions of Americans—especially single working men, single working women, elderly people on fixed incomes, recent immigrants, seasonal laborers, and anyone whose life did not fit the suburban, married-with-children template—the SRO hotel and the boarding house were the main housing market. They were the floor. They were the entry point. They were the safety net.

So, what happened? Why did the entire ecosystem come apart? The answer unfolds in several overlapping waves, and understanding them is crucial because the same forces that killed cheap urban housing in America are still shaping and distorting the housing market right now. The first wave began in the 1880s, carried along by what historians call the Progressive Era Urban Reform Movement. Reformers in cities like New York, Boston, Philadelphia, and Chicago looked at the overcrowded tenements, the saloons, the disease outbreaks, and the general chaos of fast-growing industrial cities, and they decided that the solution was moral and architectural uniformity. The ideal, as laid out in the writings of men like Lawrence Veiller—the influential New York housing reformer who essentially wrote the template for modern American zoning—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.” Multi-family dwellings were suspect. Shared housing was suspect. Any arrangement where unrelated adults ate at the same table or shared a bathroom was suspect. The culture of the boarding house—with its unmarried men and women living under the same roof, its women earning independent income, its communal meals, its mixing of social classes, its visible immigrants—all of it was reframed by reformers as a social and moral problem to be solved.

The 1905 book The Lodging House Problem in Boston by Albert Benedict Wolfe set the tone. Wolfe lumped boarding and rooming houses together and called them “a grave and far-reaching social problem.” In 1902, Robert A. Woods, writing in Americans in Progress, declared that the first enemy of the home life of the Boston West End was not foreign immigration, but the growth of urban trade that brought all these shared living arrangements. Reformers argued that boarding houses weakened the family, encouraged promiscuity, enabled vice, bred disease, and produced the wrong kind of citizen. One mid-19th-century New York critic sneered that “it may be safely affirmed that there are not 10 boarding houses in the city which do not contain improper characters.” The language was moralistic, but the underlying anxiety was about class, about immigration, about race, and about the growing economic independence of women. The home ideal was invoked constantly. The boarding house was its foil.

But moral disapproval alone could not kill a form of housing that genuinely served the needs of millions of people. For that, you needed law. And starting in the 1910s, the reformers found exactly the tool they needed: zoning. Zoning—the division of a city into districts where only certain uses are permitted—is such a familiar feature of modern life that it is easy to forget it is a relatively recent invention. The first comprehensive American zoning code was enacted in New York City in 1916. By the mid-1920s, with the publication of the Standard State Zoning Enabling Act—literally drafted with Lawrence Veiller’s involvement—cities across the country were rushing to adopt their own zoning laws. And these laws, almost universally, were written to protect single-family residential districts from everything the reformers disliked, including boarding houses, lodging houses, SRO hotels, apartment buildings, duplexes, corner stores, and commercial activity. The pattern that emerged was ruthless in its uniformity. Vast swaths of American cities, and then almost all of their suburbs, were designated as single-family-only zones. In these zones, you could not legally build a boarding house. You could not operate a rooming house. You could not run an SRO. You could not even subdivide an existing large home to take in paying tenants without violating zoning. In many cases, even informal arrangements—like letting a cousin or a lodger live in a spare room—were technically illegal and could trigger enforcement if neighbors complained. By the early 1930s, this consensus was institutional policy. The legal infrastructure for killing boarding houses was built, piece by piece, and locked into American city planning for the next century.

Then came the second wave, and this one 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 by insuring long-term mortgages. Its actual effect was to pour an avalanche of federal subsidy into one very specific type of housing: the detached single-family home in a newly built suburb. Between 1934 and 1962, the FHA and the Veterans Administration financed more than $120 billion worth of new housing.

But the FHA did not insure mortgages for just any kind of housing. Its underwriting manuals strongly preferred single-family detached houses and strongly disfavored multi-family buildings, older urban structures, and anything in a racially diverse neighborhood. The agency institutionalized redlining, with the result that only around 2% of that $120 billion went to non-white families. The federal government placed its enormous financial thumb on the scale in favor of exactly the housing zoning had already blessed—and against exactly the housing where boarding houses and SROs lived.

The combined effect was devastating. If you were a landlord in 1950, you could not easily build a boarding house because zoning forbade it. You could not easily get a federally insured mortgage for multi-family housing. And the post-war middle class you would have rented to was being lured out of the city by Levittown-style developments. In 1947, the first Levittown opened on Long Island with mass-produced houses at a scale and price that had never existed before. The young workers who in a previous generation would have rented a room in a West End boarding house were now handed the keys to their own front door, backed by federal subsidy. Boarding house proprietors watched their most desirable tenants vanish.

And this is when the third wave hit. In 1954, New York City’s housing maintenance code was amended to effectively prohibit new privately built SRO construction. In 1955, the city formally banned the creation of new SRO units, period. That same year, the city launched a tax abatement program called J51, which created direct financial incentives for landlords to convert existing SRO buildings into market-rate commercial hotels or office space. The economic calculation for owners became obvious: the city was paying you to get rid of your low-income tenants. By the time the city tried to put the brakes on this process in the mid-1980s, more than 100,000 SRO units had already been lost in New York alone. 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 21st century.

Other cities followed the same arc, often more aggressively. In Chicago, 81% of the SRO housing stock disappeared between 1960 and 1980. In San Francisco, studies estimate that 40,000 residential hotel rooms were destroyed by urban renewal programs, including more than 6,000 in just a five-year stretch. The redevelopment agency chief Justin Herman is remembered for his notorious declaration that “this land is too valuable to permit poor people to park on it.” In Seattle, half of the downtown SRO stock—16,200 units—was demolished between 1960 and 1973, with a catastrophic fire at the Ozark Hotel in March 1970 providing the political pretext. Minneapolis bulldozed its entire Gateway District in the nation’s first federally funded urban renewal project. In Boston, SRO stock dropped from 35,000 units in the early 1950s to just 9,500 by 1968. Between 1955 and 2013, researchers estimate that nearly 1 million SRO units were eliminated nationwide through regulation, conversion, or demolition.

This was not the invisible hand of the market reorganizing itself. This was the result of specific policies pursued by specific politicians and reformers with specific goals. The urban renewal programs of the 1950s and 1960s, backed by billions through the Housing Act of 1949, explicitly targeted what planners called Skid Rows and blighted neighborhoods—which in most cases meant exactly the areas where SRO hotels, flophouses, and cheap lodging houses were concentrated. The buildings were condemned, the residents were scattered, and the land was handed to private developers for convention centers, luxury hotels, office towers, and high-end residential projects.

Think about what disappeared when a neighborhood like the Bowery in Manhattan, Scollay Square in Boston, or the South of Market in San Francisco was cleared. These were not pleasant places in the sanitized post-war sense, but they were functioning communities. They had cheap single rooms starting at 10 cents a night in flophouses like the Sunshine Hotel on the Bowery, which opened in 1922 and could accommodate 125 residents. They had cheap diners and automats where you could get a hot meal for a quarter. They had informal labor markets where a man without a permanent address could still find a day’s work loading trucks or washing dishes. They had bars, missions, pawn shops, barbers—the small ecosystem of institutions that let people living on the margins hold on to some version of normal life. When urban renewal demolished these neighborhoods, it did not just destroy buildings. It erased the social infrastructure that had kept hundreds of thousands of marginal Americans housed, fed, and connected to work.

And then came the bill. In the 1980s, with the SRO stock gutted, zoning laws making it illegal to build cheap new shared housing almost anywhere, federal housing subsidies cut by the Reagan administration to roughly a tenth of their late-1970s level, and the simultaneous deinstitutionalization of psychiatric hospitals that pushed thousands of mentally ill Americans into communities with nothing left to catch them, modern mass homelessness erupted onto American streets. According to the social scientist Christopher Jencks, the homeless population grew from a little over 100,000 in 1980 to around 200,000 in 1984, to roughly 400,000 by 1987 and 1988. In the 1970s, there had actually been more rooms in flophouses than people who needed to rent them. By the early 1980s, demand for cheap single rooms exceeded the dramatically shrunken supply, and the people who could not get in ended up on the sidewalks.

Dennis Culhane, a professor of social policy at the University of Pennsylvania, has pointed directly at this chain of causation. “Many people attribute the growth of street homelessness in the ’80s to the loss of the SRO stock that began in the ’60s.” The Pew Charitable Trusts, in a 2025 analysis, put it in blunt institutional language: as the nation’s least expensive source of housing disappeared, homelessness soared in major cities across the United States. Had the country’s stock of SRO housing merely grown in line with other types of housing, researchers suggest, the entire shape of American urban poverty would look different today. One New York housing advocate memorably summarized the loss: “The people you see sleeping under bridges used to be valued members of the housing market. They aren’t anymore.”

Here is where the story becomes something more than historical. The forces that destroyed the boarding house did not stop in 1990. They are still shaping American cities right now—which is why rents in New York, San Francisco, Los Angeles, Boston, Seattle, Austin, and Denver are at levels that would have been unthinkable a generation ago. Why a growing share of young Americans cannot afford to leave their parents’ homes. Why the number of unhoused Americans has climbed to record levels. Most of the land in most American cities is still legally restricted to single-family housing. In many metropolitan areas, more than 70% of residential land is zoned exclusively for detached homes on individual lots, which means that building anything denser, cheaper, or more communal is literally illegal across the vast majority of residentially zoned terrain. The lowest rungs of the housing ladder have simply been removed by law.

Who won from all of this? Suburban homeowners won enormously, because the single-family zoning that strangled urban affordability also protected the market value of their houses by restricting supply. Developers of high-end housing won, because the land occupied by SROs and boarding houses in prime downtown locations was handed to them, often at bargain prices, through urban renewal. Big banks and mortgage insurers won, because the federal subsidy pipeline for suburban home loans turned residential real estate into one of the most profitable sectors in the American economy. Local governments won in the short term, because converting cheap SRO buildings into luxury apartments generated far more property tax revenue per square foot. The institutional and professional classes won, because they got the kind of city they preferred—cleaner, more orderly, less visibly poor.

Who lost? Single working people lost their most affordable housing option. Immigrants lost the dignified entry point that had let generations of newcomers establish themselves. Women lost one of the few paths to independent urban income that did not require a husband or a factory boss. Elderly people on fixed incomes lost the ability to live independently as they aged. The mentally ill lost the loose decentralized network of SROs that had absorbed them when state hospitals closed. Low-wage urban workers lost the possibility of walking to work from a cheap room near downtown. And eventually, inevitably, hundreds of thousands of people lost housing of any kind and ended up on the streets, where they remain.

There is, finally, a slow but real reckoning underway. In 2024, the state of Washington passed a law requiring cities and counties to permit single-room occupancy or co-living housing in areas zoned for multi-family use. The Institute for Justice has drafted model legislation called the Room Act that would reduce zoning and building code barriers to low-cost shared housing. Philadelphia has pushed to legalize single-room residences across the city. Boston is studying whether a return of SROs could help address its own housing crunch. A nonprofit in Los Angeles called SRO Housing Corporation has created dwellings for more than 2,000 formerly homeless people in what used to be condemned residential hotels. In Portland, Oregon, actual working SROs like the Broadway Hotel still operate, offering a glimpse of what the entire country used to look like.

But reversing a century of policy is slow and politically brutal. Every attempt to legalize cheap shared housing in a residential neighborhood runs into fierce opposition from existing homeowners who use the exact same language the progressive reformers used in the 1890s—that these are the wrong kind of residents, that property values will fall, that the character of the neighborhood will change, that the family-oriented ideal of American life is under threat. The fingerprints of Lawrence Veiller and the Standard State Zoning Enabling Act are still visible on every planning commission meeting where a modest proposal to legalize a few duplexes or a small boarding house gets voted down by three votes to two. The infrastructure of exclusion is still in place. The ladder is still broken.

So the next time you walk through an American city and wonder why rents are so punishing, why there are so many people sleeping on sidewalks, why young workers cannot afford to move to the cities where the jobs are, remember the vanished world of the boarding house. Remember the $3-a-week rooms in Philadelphia. Remember the Sunshine Hotel on the Bowery. Remember the 200,000 SROs that New York had in 1950 and the 19,000 it has today. Remember the 1 million SRO units that disappeared nationwide in the span of a few decades. This was not inevitable. This was not natural market evolution. This was a choice made by legislators and reformers and city planners over the course of a century to prohibit the kind of housing that millions of ordinary Americans used to live in. The cost of that choice is still being paid every month in rent checks, in evictions, in tent encampments, and in the quiet mathematics of a working person realizing they cannot afford the city they work in.

The lesson is uncomfortable because it cuts against a lot of comfortable assumptions. Markets do not freely produce the housing we need. The housing stock of an American city is the product of a hundred years of specific legal and financial decisions, most of which were made with other goals in mind, and most of which have never been seriously revisited. The things we treat as natural features of the urban landscape—that most residential land is reserved for single-family homes, that unrelated adults cannot easily share a building without triggering code enforcement, that the cheapest form of housing in a major city costs ten times what it would have cost a working person in 1920—are not natural at all. They were built, legislated, enforced, and defended. Which means, at least in theory, they can also be unbuilt.

Whether that happens in time to prevent another generation of unnecessary homelessness and housing insecurity is the open question of our moment. The quiet revolutions in Washington state, in Minneapolis, in Portland, and in a handful of other cities that have begun loosening single-family zoning suggest that change is possible. The ferocity of the opposition in most of the country suggests how long and ugly the fight will be. The vanished boarding houses of 19th-century America are, in that sense, not just a lost chapter of history. They are a reminder that we once had a working model for cheap urban living, that it served millions of people for over a hundred years, and that we destroyed it on purpose.

So here is the question that now hangs over every American city: if we could build a version of that ladder again—one that fits the lives of nurses, teachers, students, retirees, and newcomers in the 21st century—would you support it on your own block, or would you be the one showing up at the planning meeting to say, “not in my neighborhood”? Let us know in the comments below.