Boarding houses do still exist in the United States, though most of them no longer go by that name. The meal-service model that defined the classic boarding house has largely disappeared, but the underlying arrangement — renting a private room in a shared building — continues under labels like single room occupancy (SRO) unit, rooming house, lodging house, and co-living space. What’s changed is the legal environment around them. Zoning rules, licensing requirements, and building codes have pushed this form of housing out of most residential neighborhoods and into a narrower slice of the market than it once occupied.
What Boarding Houses Look Like Now
The word “boarding house” historically meant a home where a proprietor rented rooms and served meals, usually to single workers or new arrivals in growing cities. That meal component has mostly vanished. The room-rental structure lives on in several forms.
Single room occupancy units are the closest modern equivalent: one private room in a larger building, with bathrooms and kitchens shared down the hall. SROs served as critical low-cost housing for decades, though many cities demolished or converted their SRO stock during urban renewal campaigns in the 1960s and 1970s.
Rooming houses and lodging houses are terms that still appear in municipal codes, describing properties where several unrelated people each rent a single room. Co-living is the newest iteration, marketing shared housing to young professionals and remote workers with furnished rooms, cleaned common areas, and all-inclusive pricing. The co-living sector accounts for a meaningful share of the North American shared-housing market. Despite the branding differences, every version works the same way: you rent a private room and share everything else.
Why They’re Hard to Find: Zoning
Local zoning is the single biggest reason boarding houses have become scarce in ordinary residential neighborhoods. Most residential districts are built around the single-family home, and the codes define “family” in ways that effectively rule out boarding house arrangements. Zoning codes in roughly two-thirds of the 30 largest U.S. cities or their nearby suburbs limit the number of unrelated people who can share a dwelling. Some cities cap it at two, others at three or four. The specifics vary, but the pattern doesn’t: if you want to rent rooms to several unrelated individuals in a standard residential zone, the code probably doesn’t allow it.
The U.S. Supreme Court gave these restrictions constitutional backing in 1974. In Village of Belle Terre v. Boraas, the Court upheld a New York village ordinance that defined “family” as one or more related persons, or no more than two unrelated persons, and restricted land use to one-family dwellings. The 7-2 majority held that the ordinance did not violate the Equal Protection Clause because it was rationally related to a legitimate government interest in controlling density and preserving residential character.1Oyez. Village of Belle Terre v. Boraas That decision remains good law, and it gives municipalities broad authority to restrict unrelated cohabitation in single-family zones.
In practice, an owner who wants to run a rooming house usually needs to operate in a zone that permits it — often commercial or mixed-use — or obtain a conditional use permit or special exception from the local zoning board. Those permits typically involve public hearings, neighbor notification, and planning commission approval. Months of process. Sometimes organized opposition.
Licensing, Inspections, and Fines
Zoning is only the first hurdle. Most cities also require a lodging house license or multi-unit dwelling permit before you can rent out individual rooms. Getting one means inspections by fire, health, and building departments, plus annual fees that vary widely by jurisdiction and property size. A property operating without the correct license can be declared a nuisance and hit with a closure order.
Operating without permits triggers civil fines too. Many municipalities impose per-day penalties for ongoing violations, with daily fines ranging from $100 to $1,000 depending on the jurisdiction. A pattern of serious code violations, particularly life-safety failures, can lead to criminal charges such as reckless endangerment in some places. The financial exposure adds up quickly.
Fire Codes and Building Standards
Fire codes treat rooming houses more seriously than single-family homes because the risk profile is different: multiple unrelated occupants sleeping behind closed doors don’t wake each other during a fire the way a family would. Jurisdictions that adopt the NFPA Life Safety Code or a comparable standard generally require smoke alarms in every bedroom, audio and visual notification devices in common areas, and enclosed stairwells with fire-rated, self-closing doors in buildings with upper-floor rooms.
Egress rules are strict. Each floor generally needs at least two unobstructed exits above a certain size, and travel distance from any room to the nearest exit is capped. Exit doors have to swing open easily, without deadbolts or throw bolts that would slow escape. Retrofitting an older home to meet these standards — fire-rated doors, emergency lighting, compliant stairwells — can run into tens of thousands of dollars before a single room is rented.
Habitable rooms in rooming houses also face minimum dimension standards under widely adopted model codes. Bedrooms have per-occupant square footage minimums, ceiling height minimums, and requirements for light, ventilation, and direct access to a toilet. Inspectors check them, and violations can block or revoke a license.
Fair Housing and the Mrs. Murphy Exemption
The Fair Housing Act applies to rooming houses. Occupancy limits are legal, but they can’t serve as a pretext for discrimination against protected classes, including families with children, people with disabilities, or any group defined by race, color, religion, sex, or national origin. Land-use rules that restrict housing opportunities based on a protected characteristic violate the Act even if they look neutral on their face.2eCFR. 24 CFR Part 100 – Discriminatory Conduct Under the Fair Housing Act
HUD’s longstanding guidance, known as the Keating Memo, treats two persons per bedroom as a reasonable general benchmark under the Fair Housing Act. That standard is rebuttable based on bedroom size, unit configuration, the age of children, and the capacity of building systems. The point is that occupancy limits have to be applied consistently and grounded in physical constraints, not used to screen out families or other protected groups.
Small owner-occupied operations get a partial break. Under the Fair Housing Act’s “Mrs. Murphy exemption,” dwellings containing living quarters occupied by no more than four families living independently, where the owner actually maintains and occupies one of those quarters as a residence, are exempt from certain Fair Housing Act prohibitions.3Office of the Law Revision Counsel. 42 US Code 3603 – Effective Dates of Certain Prohibitions A homeowner renting three rooms in the house they live in may not face the same anti-discrimination requirements as a larger commercial operator. The exemption has limits, though. It doesn’t cover advertising, so discriminatory listing language is still illegal regardless of building size. Many state and local fair housing laws contain no such exemption at all.
ADA Coverage
The Americans with Disabilities Act reaches some rooming houses and not others. Under Title III’s regulations, a “place of lodging” offering rooms primarily for short-term stays (generally 30 days or less) has to comply with accessibility standards, with one exception: facilities containing no more than five rooms for rent where the proprietor actually resides on the premises are exempt.4eCFR. 28 CFR Part 36 – Nondiscrimination on the Basis of Disability by Public Accommodations and in Commercial Facilities A small owner-occupied boarding house with four rooms falls outside ADA coverage. A larger operation with six or more rooms, or one where the owner lives elsewhere, doesn’t get that exemption and has to meet the 2010 ADA Standards for Accessible Design when the property is built or altered.
Even when the ADA doesn’t apply, the Fair Housing Act’s disability protections usually do. A rooming house operator who refuses reasonable accommodations for a tenant with a disability can face a Fair Housing complaint regardless of ADA status.
Lodger or Tenant: Why the Label Matters
The distinction between a lodger and a tenant is one of the most consequential features of rooming house law, and one of the least understood. In most states, a lodger is someone who rents a room in a home where the owner also lives. A tenant rents a self-contained unit, or a room in a building where the owner doesn’t live. The classification decides what happens when things go wrong.
Evicting a tenant generally requires filing a formal unlawful detainer action in court, a process that can take weeks or months. Removing a lodger is often faster. In many states, the owner of an owner-occupied home can terminate a lodger’s stay with notice equal to one rental period, and a lodger who refuses to leave after that notice may be treated as a trespasser.
The line moves with the facts. If an owner rents a room and then moves out of the house, the lodger may become a tenant under state law, gaining full eviction protections. If the owner never lived in the building, every occupant is a tenant from day one, no matter what the lease says. Trying to skip formal eviction by mislabeling a tenant as a lodger is a common route to a wrongful eviction lawsuit. State laws differ on the exact definitions, so anyone renting or renting out a room needs to know how their jurisdiction draws the line.
Tax Treatment
How the IRS classifies rooming house income depends on the services provided. Renting rooms and supplying basic utilities is generally passive rental income reported on Schedule E. Providing what the IRS calls “substantial services” for a tenant’s convenience — regular cleaning, changed linens, maid service — shifts the income to active business income on Schedule C, subject to self-employment tax.5Internal Revenue Service. Publication 527 – Residential Rental Property
That distinction echoes the original difference between boarding houses and rooming houses. A boarding house that served meals and cleaned rooms was running a hospitality business. A rooming house that just rented space was a landlord. The IRS still draws roughly the same line. Furnishing heat, taking out trash, and cleaning common hallways don’t count as substantial services. Daily maid service or meals do. The self-employment tax adds 15.3% on net income for Social Security and Medicare, so operators who straddle the line should track their services carefully.
Federal Support for SRO Housing
One direct federal program still targets this kind of housing. The Section 8 Moderate Rehabilitation Single Room Occupancy Program provides rental assistance for homeless individuals living in rehabilitated SRO units. The rehabilitation must involve a minimum expenditure of $3,000 per unit, including the unit’s share of work on common areas and building systems, to bring the property up to Housing Quality Standards.6eCFR. 24 CFR Part 882 Subpart H – Section 8 Moderate Rehabilitation Single Room Occupancy Program for Homeless Individuals Rehabilitation costs are covered through initial contract rents negotiated with the local public housing agency, and HUD can raise per-unit cost limits in areas with high construction costs or stringent building codes.
The program won’t fit every operator, but it’s one of the few federal subsidies aimed specifically at the low-cost, room-by-room housing model that boarding houses have always represented. Local public housing agencies administer it, so availability and funding vary by region.