How Many People Can Live in a House? Bedroom and Zoning Limits

How many people can live in a house depends on four rules stacked on top of each other, and the tightest one wins: a federal fair housing guideline of roughly two people per bedroom, your local building code’s square footage minimums, your city’s zoning cap on unrelated occupants, and whatever your lease says. A three-bedroom home might legally hold six people under one rule and only three under another. You have to check all four.

The Federal Two-Per-Bedroom Guideline

The most cited number comes from a 1991 memo by HUD General Counsel Frank Keating, formally adopted by the Department of Housing and Urban Development in 1998. It says “an occupancy policy of two persons in a bedroom, as a general rule, is reasonable under the Fair Housing Act.”¹ Landlords, property managers, and housing authorities lean on that figure when they set caps.

It is a starting point, not a hard ceiling. HUD says explicitly it will not judge compliance “based solely on the number of people permitted in each bedroom.” The agency also weighs:

The size of the bedrooms and the unit as a whole.
The ages of any children in the household.
Whether the unit has extra livable space like a den or loft.
The capacity of the building’s septic, sewer, and electrical systems.
Whether a state or local code already sets an occupancy standard the landlord is following.¹

So a landlord who caps a large one-bedroom at two people and refuses to rent to a couple with a newborn is on shakier ground than a landlord capping a tiny one-bedroom at the same number.

Square Footage Minimums in the Building Code

Most cities have adopted some version of the International Property Maintenance Code, which sets hard floors on how much space each occupant needs. From Section 404.4.1 and Table 404.5:

A bedroom must be at least 70 square feet for one person. If two or more people share it, each occupant needs at least 50 square feet.
A living room needs at least 120 square feet for one or two occupants, rising to 150 square feet once six or more people live in the unit.
A dining room has no minimum for one or two occupants, 80 square feet for three to five, and 100 square feet for six or more.²

The bedroom math is the one to run first. Measure the room, divide by 50, and that is the maximum number of sleepers, provided the room hits 70 square feet in the first place. A standard 10-by-12 bedroom at 120 square feet fits two people. A 90-square-foot room fits one.

The code also bars landlords from counting living room space toward bedroom minimums. Sleeping arrangements in the living room do not offset a cramped bedroom.² And every legal bedroom needs an emergency escape opening, usually a window someone can climb through. A room without one is not a bedroom for occupancy purposes, no matter how big it is.

Zoning Caps on Unrelated Occupants

Cities layer their own zoning restrictions on top of the building code, and these hit hardest in single-family neighborhoods and college towns. The typical cap on unrelated people sharing a single-family home is somewhere between two and four, depending on the jurisdiction.

The mechanism is the local definition of “family.” Related people (by blood, marriage, or adoption) generally do not count against the cap, no matter how many of them live together. Roommates do. A five-bedroom house can still be limited to three occupants if none of them are related and the ordinance says three.

Penalties vary. Some cities issue daily fines that escalate until the extra tenants move out; others go to court for an order requiring them to leave. Enforcement usually starts with a neighbor complaint, an investigation, and a notice to correct. Property owners are the ones held responsible, even when the tenants are the ones who invited others in.

What Your Lease Says

Your lease sets its own occupancy limit and can be stricter than the code allows, as long as it does not violate fair housing law. A lease might cap the unit at two people, or it might list authorized residents by name and treat everyone else as a guest.

That guest-versus-occupant line is where most lease fights happen. Leases commonly define a guest as someone staying fewer than 10 to 14 consecutive nights. Once a person stays longer, sleeps there regularly, receives mail at the address, or keeps their things in the unit, they start to look like an unauthorized occupant. Courts look at the whole picture: whether the person has another home, whether they contribute to rent or expenses, and whether the stay has an end date.

Going over the lease limit is a breach of contract. The landlord does not have to prove the unit is physically overcrowded or that a code was violated; the lease itself creates the obligation. You can lose your security deposit, owe additional fees, and face eviction. Adding a partner or roommate to the lease before they move in avoids the problem.

How Children and Infants Are Counted

Familial status is a protected class under the Fair Housing Act. Under 42 U.S.C. § 3604, it is illegal to discriminate in the terms of a rental or sale based on familial status, which includes households with children under 18.³ An occupancy policy of one person per bedroom, for instance, would screen out most families with children and would need a strong safety or building-code justification to survive a challenge.

The Keating Memo does not exempt infants outright, but it treats age as a factor. HUD’s own example: the agency might pursue a complaint against a landlord who bars two parents and their infant from a large one-bedroom apartment, but not against one who bars two parents and a teenager from the same unit. Some local codes explicitly exclude children under one year old from occupancy calculations. The memo also warns that “an occupancy policy which limits the number of children per unit is less likely to be reasonable than one which limits the number of people per unit.”¹

Federal law does not replace local zoning or building codes, but it overrides them when a specific occupancy policy discriminates against a protected class. The Justice Department and HUD have put it this way: local governments have primary power over land use, but “if that power is exercised in a specific instance in a way that is inconsistent with a federal law such as the Fair Housing Act, the federal law will control.”⁴

What Happens if You Go Over the Limit

The consequences depend on which rule you break. A building inspector responding to a complaint can order the extra occupants out and, in serious cases, declare the unit uninhabitable. Correcting a violation may require adding an egress window or reconfiguring rooms, which falls on the owner. A zoning violation typically brings notices to correct, escalating fines, and sometimes a court order.

A lease violation gives your landlord grounds for eviction and can cost you your deposit. And on the other side of the equation, a family that believes an occupancy policy discriminates based on familial status can file a complaint with HUD or sue in federal court within two years of the discriminatory act under 42 U.S.C. § 3613.⁵

Working Out Your Number

Start with the bedrooms. Measure each one and apply the 70-square-feet-for-one, 50-square-feet-per-person-for-two-or-more rule. Add up the total the building code allows. Then check the two-per-bedroom guideline as a sanity check. Then look up your city’s zoning ordinance to see if there is a cap on unrelated occupants and how it defines a family. Finally, read your lease. The lowest of those four numbers is how many people can legally live in your home.

1
U.S. Department of Housing and Urban Development. Keating Memo on Occupancy Standards
2
International Code Council. 2021 International Property Maintenance Code – Chapter 4 Light, Ventilation and Occupancy Limitations
3
Office of the Law Revision Counsel. 42 USC 3604 – Discrimination in the Sale or Rental of Housing
4
U.S. Department of Justice. Joint Statement on Group Homes, Local Land Use, and the Fair Housing Act
5
Office of the Law Revision Counsel. 42 USC 3613 – Enforcement by Private Persons