Occupancy limits for apartments come from three sources working together: your local housing code sets the binding legal cap (usually based on each room’s square footage), HUD treats two people per bedroom as a reasonable general benchmark under the Fair Housing Act, and your lease can set its own cap as long as it is reasonable and applied the same way to everyone. The local code almost always controls, so the building or code enforcement office in your city is the definitive source for your unit.
Where the Number Comes From
No federal law sets a single occupancy cap for every apartment. Instead, three layers overlap.
At the federal level, HUD issued the Keating Memo in 1991, later formalized as policy, stating that a two-persons-per-bedroom standard is “reasonable” as a general rule under the Fair Housing Act.1Department of Housing and Urban Development. Fair Housing Enforcement Occupancy Standards Statement of Policy That isn’t a binding ceiling. It’s the benchmark HUD uses when deciding whether a landlord’s policy is discriminatory against families with children.
The legally enforceable cap usually comes from a local city or county housing code. Many jurisdictions adopt the International Property Maintenance Code (IPMC), a model code that ties occupancy to the physical dimensions of each room rather than just the bedroom count.2International Code Council. International Property Maintenance Code Chapter 4 – Light, Ventilation and Occupancy Limitations Local versions often modify the numbers, so check with your building department for the figures that apply to your address.
The third layer is the lease itself. A landlord can set a cap in the rental agreement as long as it is reasonable and enforced uniformly.
The Two-Per-Bedroom Benchmark
The Keating Memo’s two-per-bedroom rule is a starting point, not a formula. When HUD investigates a complaint about an occupancy policy, it weighs several additional factors:1Department of Housing and Urban Development. Fair Housing Enforcement Occupancy Standards Statement of Policy
- The size of each bedroom and the unit overall. A small bedroom in a mobile home reasonably holds fewer people than a large master suite.
- The layout. A two-bedroom with a den or study can reasonably hold more people than one without flexible space.
- The ages of children. HUD has noted that restricting an infant from sharing a bedroom with two parents in a large one-bedroom could warrant a discrimination charge, while the same restriction applied to a teenager might not.
- Building infrastructure. Septic capacity, sewer limits, and similar physical constraints are legitimate reasons to restrict occupancy.
- State and local law. If a landlord’s cap matches local code, HUD treats that as evidence the policy is reasonable.
A landlord whose policy is stricter than two per bedroom carries a higher burden of justification. One whose policy matches local code and reflects genuine physical constraints is on much safer ground.
How Square Footage Sets the Real Limit
Under the IPMC, the occupancy count is driven by room dimensions. Two kinds of minimums work together.
Every bedroom must be at least 70 square feet. Every living room must be at least 120 square feet, rising to 150 when six or more people live in the unit. When more than one person shares a bedroom, there must be at least 50 square feet of floor area per person in that room.2International Code Council. International Property Maintenance Code Chapter 4 – Light, Ventilation and Occupancy Limitations
Take a two-bedroom apartment where the first bedroom is 100 square feet and the second is 70. The first bedroom can house two people (100 ÷ 50 = 2). The second meets the 70-square-foot minimum for one person but falls short of the 100 square feet needed for two. The maximum bedroom-based occupancy is three, even though two-per-bedroom would suggest four.
The code also caps overall dwelling occupancy through minimum living and dining room areas, set out in Table 404.5 and scaled to the number of occupants. Living and sleeping space can’t double count: you can’t treat required living room area as sleeping area.2International Code Council. International Property Maintenance Code Chapter 4 – Light, Ventilation and Occupancy Limitations A unit with roomy bedrooms can still hit its cap if the common areas are small.
Some jurisdictions set larger minimums than the IPMC, and a few allow smaller ones. Call your local building department for the exact numbers.
When a Landlord’s Own Cap Is Legal
A landlord who limits a two-bedroom to four occupants and applies that rule to every applicant, regardless of whether they have children, is on solid legal footing. A landlord who sets a one-person-per-bedroom cap with no documented justification is inviting trouble.
The Fair Housing Act makes it illegal to discriminate in the terms or conditions of a rental because of familial status.3Office of the Law Revision Counsel. 42 USC 3604 – Discrimination in the Sale or Rental of Housing and Other Prohibited Practices A policy that is neutral on its face but effectively screens out families with children can still violate the law. Capping a spacious two-bedroom at two occupants, for example, would exclude almost any family with a child even though the policy doesn’t mention children.
What tends to make a policy defensible: alignment with local building code, documented physical limits (septic, plumbing), and consistent enforcement across every tenant. What raises red flags: caps stricter than code with no engineering reason, rules applied selectively to families, and comments about children during the application process.1Department of Housing and Urban Development. Fair Housing Enforcement Occupancy Standards Statement of Policy
Families, Infants, and Familial Status
The Fair Housing Act prohibits landlords from refusing to rent to, imposing special conditions on, or otherwise making housing unavailable to families with children under 18.4U.S. Department of Justice. The Fair Housing Act The protection covers parents, legal guardians, pregnant individuals, and anyone securing custody of a child. Landlords also cannot impose rules that single out families, such as restricting children from common areas or charging child-specific deposits.
One scenario trips up both sides: a newborn that pushes the household one over the lease cap. Infants are generally not counted as additional occupants under fair housing principles. Forcing a family to move to a larger unit, or declining to renew the lease because of the new baby, can result in a discrimination complaint — even if the non-renewal comes at the end of the term.1Department of Housing and Urban Development. Fair Housing Enforcement Occupancy Standards Statement of Policy The Keating Memo specifically treats the age of the child as relevant.
One boundary: these familial status protections do not apply to qualifying senior housing. Communities where every unit is occupied by someone 62 or older, and communities where at least 80 percent of occupied units have at least one resident aged 55 or older, can legally refuse families with children.5eCFR. 24 CFR Part 100 Subpart E – Housing for Older Persons Outside of those categories, no such exemption exists.
If You Have a Housing Choice Voucher
Section 8 applies a different occupancy framework. HUD’s Housing Quality Standards require that a voucher unit have at least one bedroom or living/sleeping room for every two people, and children of opposite sex generally can’t be required to share a bedroom. Beyond that, HUD doesn’t set a minimum square footage per person for voucher units the way the IPMC does for general housing.
The housing authority assigns a voucher bedroom size based on household size, typically one bedroom for every two people, and the subsidy is calculated using either the voucher size or the actual unit size, whichever is smaller. You can rent larger, but the subsidy won’t rise to match. You can rent smaller as long as the unit meets the two-persons-per-room standard.1Department of Housing and Urban Development. Fair Housing Enforcement Occupancy Standards Statement of Policy
Guests Versus Unauthorized Occupants
Most leases spell out how long someone can stay before they stop being a guest and become an occupant. Common thresholds run from a few consecutive days to two weeks, depending entirely on the lease. A partner who stays over a few nights a week is usually fine. The same person sleeping there every night for a month is likely an unauthorized occupant.
An unauthorized occupant is a lease violation. The landlord’s first step is typically a written notice giving you a chance to fix the problem, either by having the extra person leave or by applying to add them to the lease. Notice timelines vary by jurisdiction, with some areas allowing as little as three to five days. If the tenant doesn’t correct the violation, the landlord can begin eviction proceedings. A landlord who skips the formal notice process and tries to force someone out informally risks legal liability.
What Happens If You Go Over
For Tenants
Exceeding the cap is a breach of the lease. The landlord will typically issue a written notice requiring you to come back into compliance within a set number of days by having extra occupants move out or getting them approved on the lease. If you don’t, the landlord can file for eviction. A second violation within the same year may result in a termination notice with no opportunity to cure in some jurisdictions.
Overcrowding can also draw code enforcement. If an inspector finds a unit occupied beyond its legal capacity, the household may be required to shrink regardless of what the lease says.
For Landlords
A landlord who knowingly allows overcrowding faces municipal fines and potential liability for unsafe conditions. If a fire or structural failure injures someone in an overcrowded unit, the landlord’s knowledge of the violation becomes central to any lawsuit. Code enforcement can impose daily fines until the violation is corrected, and repeated violations can affect a rental license in jurisdictions that require one.
Enforcing a cap too aggressively carries its own risk. A policy that effectively excludes families with children, even unintentionally, can result in HUD investigations, civil penalties, and damages awarded to the affected family.
Filing a Fair Housing Complaint
If you believe a landlord is using an occupancy policy to discriminate against your family, you can file a complaint with HUD’s Office of Fair Housing and Equal Opportunity. Submit online at hud.gov, call 1-800-669-9777, or mail a printed form to the regional office.6Department of Housing and Urban Development. Report Housing Discrimination Time limits apply, so report as soon as possible after the incident. You’ll need the landlord’s name and address, the property, a description of what happened, and the dates involved. HUD investigates at no cost, and the process can lead to mediation, formal charges, or referral to the Department of Justice.