Roommate Clause
in Your Lease
What it actually means, what Michigan law says, what's specific to Detroit - and exactly what to do. In plain English.
Quick Summary - What You Need to Know
- The Michigan sections we read set no deadline for telling a landlord that a new roommate has moved in. Any notice period for adding someone is a term to look for in the lease.
- MCL 554.601(g) defines a tenant as "an individual who occupies a rental unit for residential purposes with the landlord's consent for an agreed upon consideration." Consent is written into the definition itself.
- MCL 554.601b(5) keeps co-tenants bound when one of them is released under the safety release: "all other tenants who are parties to the rental agreement remain subject to the rental agreement."
- MCL 125.483 bars occupying a bedroom in a single, two-family or class a multiple dwelling so as to give less than 300 cubic feet of air space per occupant, and sets 800 cubic feet per occupant for a whole family dwelling unit.
- Detroit's zoning code counts as a family two unrelated people, or two related people and one unrelated person, living as one housekeeping unit under § 50-16-201. A larger group needs written city recognition as a functional family under § 50-12-157.
Understanding the Roommate Clause
A roommate clause decides who may live in the unit, what has to happen before someone joins, and how soon the landlord must hear about it. On the last question, the Michigan sections we read set no deadline, which leaves your lease as the document that answers it.
Michigan does tie tenancy itself to consent. MCL 554.601(g) defines a tenant as someone who occupies a rental unit "with the landlord's consent for an agreed upon consideration". A landlord's yes is part of the definition, not a courtesy added to it.
Detroit answers a different question, about the household. Its zoning code defines a family to include two unrelated people, or two related people and one unrelated person, living as one housekeeping unit.
A group outside that definition needs written city recognition as a functional family, and a landlord's approval is not that recognition.
The Michigan text behind this page was read on archived copies of the Legislature's own pages. Read MCL 554.601 as it stands today before you rely on it.
What renters assume
That Michigan gives a Detroit renter a grace period, some number of days after a partner or a friend moves in, before the landlord has to be told.
What is actually true
The Michigan sections we read attach no day count to adding an occupant. What they do say, in MCL 554.601(g), is that a tenant occupies "with the landlord's consent", which makes the notice and approval terms in your lease the ones to read first.
The bars in the comparison on this page measure the deadline for telling a landlord about a new roommate. Two of the 18 rows carry a figure: New York City at 30 days and Seattle at 30 days under a Seattle rule. The other 16 rows carry none.
Twelve of those read no statute: Austin, Los Angeles, Miami, Chicago, Denver, Phoenix, Atlanta, Nashville, Philadelphia, Portland, Boston and Las Vegas. Washington, DC reads lease controls consent, Columbus no statute; lease controls, Newark no statute; city occupancy caps, and Detroit no statute; zoning family limit.
Detroit's label names a limit, not a clock. The family definition in § 50-16-201 describes who makes up one household, and our record of it carries no notice period. A Detroit renter looking for a deadline will find it, if anywhere, in the lease.
Plain English Version
Three separate questions sit under a roommate clause in Detroit. Whether someone may move in, and how fast you must say so, comes from your lease; the Michigan sections we read set no deadline for it.
How much space each sleeper needs comes from the Housing Law of Michigan, measured in cubic feet of air. And Detroit's zoning code describes one household: two unrelated people, or two related people and one more, with larger groups needing written city recognition first.
Roommate Clause Example - What the Wording Looks Like in Detroit, MI
The sample clause below is real lease language - a court quoted it word for word, and then ruled on it. What the judge decided is at the bottom of this block.
Find the equivalent paragraph in your own lease and read the two side by side. The wording will differ; the moving parts rarely do.
REIMBURSEMENT. You must promptly reimburse us for loss, damage, or cost of repairs or service caused anywhere in the apartment community by your or any guest's or occupant's improper use or negligence. […]
Quoted from the published opinion in Churchill Forge, Inc. v. Brown, 61 S.W.3d 368 (Tex. 2001). Judicial opinions are not subject to copyright; the lease language is reproduced in limited part for commentary under 17 U.S.C. § 107.
“REIMBURSEMENT. You must promptly reimburse”
You is whoever signed, and in Michigan consent is what makes a person a tenant in the first place. MCL 554.601(g) defines a tenant as an individual who occupies a rental unit “with the landlord's consent for an agreed upon consideration.” A roommate the landlord never agreed to is not who that definition describes, and this sentence puts the household's damage on the person who did sign.
“for loss, damage, or cost of repairs”
This is where a shared lease turns into money, and Michigan has a rule about who stays on the hook. MCL 554.601b(5) says that where “a rental agreement obligates multiple tenants to be liable for rental obligations and a tenant is released” under the safety release, “all other tenants who are parties to the rental agreement remain subject to the rental agreement.” The release frees the person in danger; the co-signers keep the lease, this paragraph included.
“anywhere in the apartment community by your”
The lease draws its line by place. Michigan's Housing Law draws one by air. MCL 125.483 bars occupying a bedroom in a single, two-family or class a multiple dwelling so as to give less than 300 cubic feet of air space per occupant. It sets 800 cubic feet per occupant for a whole family dwelling unit, leaving out bathrooms, toilet rooms and closets.
“any guest's or occupant's improper use or negligence”
Occupant is the Detroit word that matters, because the city's zoning code counts occupants into households. Detroit City Code § 50-16-201 counts as a family two persons not related by blood, marriage, adoption or guardianship, or two related persons and one unrelated person, living as a single housekeeping unit. A larger group may claim functional family status under § 50-12-157, but may not occupy a dwelling as one until the city recognizes the claim in writing.
The co-signer's defence failed. JoAnn Brown signed an apartment lease as a cotenant with her adult son. He was alleged to have started a fire that damaged the complex, the landlord sued only her, and she argued she could not be charged for damage she had not caused. The Texas Supreme Court disagreed, reversed the summary judgment she had won and held this sentence enforceable against a cotenant who was not herself negligent. The route ran through two sections. Tex. Prop. Code § 92.052(b) gives a landlord no duty to repair damage caused by the tenant, an occupant or a guest, so § 92.006(e) had no repair duty to stop the parties contracting over; and the fair-notice doctrine did not apply, because the sentence does not shift the landlord's own negligence onto the tenant. The court added that neither statute, common law nor the Restatement bars “requiring a tenant to reimburse the landlord for damages negligently caused by the tenant or one occupying the premises with the tenant's consent.” A dissent would have held the sentence unenforceable outright because it was not underlined or conspicuous, as § 92.006(e)(4) requires. This is 2001 Texas law, decided on the Texas Property Code - state-specific, and not a national rule.
One court, one lease, one state. That answer is not automatically yours, and your lease may be worded to land differently. Use this to know what to look for and what to ask - your state's tenant hotline or a local tenant attorney can answer it for your document.
Michigan Law on Roommate Clause
- Michigan defines a tenant by the landlord's consent. MCL 554.601(g) says a tenant is "an individual who occupies a rental unit for residential purposes with the landlord's consent for an agreed upon consideration." Section 554.601(a)(i) counts "The owner, lessor, or sublessor of a rental unit" as a landlord for the purposes of the Landlord-Tenant Act.
- Co-tenants stay on the lease when one leaves under the safety release. MCL 554.601b lets a tenant with a reasonable apprehension of present danger from domestic violence, sexual assault or stalking be released from future rent after written notice by certified mail and documentation. Section 554.601b(5) adds that where "a rental agreement obligates multiple tenants to be liable for rental obligations and a tenant is released", "all other tenants who are parties to the rental agreement remain subject to the rental agreement."
- The Housing Law of Michigan sets space and roomer limits. MCL 125.483 says no bedroom in a single, two-family or class a multiple dwelling "shall be so occupied as to provide less than 300 cubic feet of air space per occupant", and sets 800 cubic feet per occupant for a whole family dwelling unit, excluding bathrooms, toilet rooms and closets. Under MCL 125.402(3a), in single and two-family dwellings "the number of such bedrooms leased or rented to roomers shall not exceed 3" unless the dwelling complies with the multiple dwelling rules. Section 125.401(2) applies the act to each city, village and township of 10,000 or more people, and to private and two-family dwellings in a place under 100,000 only if its legislative body adopts the act.
- Detroit's functional family test is demanding. In the R1, R2 and R3 districts, § 50-12-157(c) requires that the group have no more than six members, a "demonstrable and recognizable bond, not of a commercial nature", a single household budget, regular shared meals and upkeep, and that "The members legally share in the ownership or possession of the premises, such as being tenants in common on a deed or co-signers of a single lease".
Sources include Mich. Comp. Laws § 554.601; Mich. Comp. Laws § 554.601b; Mich. Comp. Laws § 125.402; Mich. Comp. Laws § 125.483; Detroit City Code § 50-16-201; Detroit City Code § 50-12-157; Detroit City Code § 50-16-172 - statutes change; verify the current text for your situation.
Start with what the Michigan sections we read leave open. They set no deadline for telling a landlord that a new roommate has moved in, and any notice period for adding one is a term to look for in the lease.
What Michigan does write is a definition built on consent. MCL 554.601(g) says a tenant is "an individual who occupies a rental unit for residential purposes with the landlord's consent for an agreed upon consideration." Under § 554.601(a)(i), "The owner, lessor, or sublessor of a rental unit" counts as a landlord for the act's purposes.
Read side by side, those two definitions frame a roommate question. A person living in the unit without the landlord's consent is not who the tenant definition describes, and a tenant who takes in a paying subtenant can fall within the landlord definition.
Several people on one lease meet a second rule. MCL 554.601b lets a tenant with a reasonable apprehension of present danger from domestic violence, sexual assault or stalking be released from future rent, after written notice by certified mail and documentation.
§ 554.601b(5) then speaks to the people left behind. Where "a rental agreement obligates multiple tenants to be liable for rental obligations and a tenant is released", "all other tenants who are parties to the rental agreement remain subject to the rental agreement."
The Housing Law of Michigan measures the space. MCL 125.483 says no bedroom in a single, two-family or class a multiple dwelling "shall be so occupied as to provide less than 300 cubic feet of air space per occupant".
It sets 800 cubic feet per occupant for a whole family dwelling unit, excluding bathrooms, toilet rooms and closets.
Roomers have a ceiling of their own. Under MCL 125.402(3a), in single and two-family dwellings "the number of such bedrooms leased or rented to roomers shall not exceed 3" unless the dwelling complies with the multiple dwelling rules.
§ 125.401(2) sets the act's reach: each city, village and township of 10,000 or more people, with private and two-family dwellings in a place under 100,000 covered where its legislative body adopts the act. None of these figures is a notice period.
Read MCL 554.601, § 554.601b and § 125.483 as they stand today, since the copies behind this page are archived ones.
Michigan Tenant Protections
The first point is where the answer sits. The Michigan sections we read set no deadline for telling a landlord about a new roommate, which leaves the notice and approval paragraph in your lease as the document that answers it, and the time to read it is before you sign.
The second is the definition. MCL 554.601(g) defines a tenant as an individual who occupies a rental unit for residential purposes with the landlord's consent for an agreed upon consideration.
The third is the co-tenant rule. Under MCL 554.601b(5), where a rental agreement obligates multiple tenants to be liable for rental obligations and a tenant is released under the safety release, all other tenants who are parties to the rental agreement remain subject to it. The fourth is space.
MCL 125.483 bars occupying a bedroom in a single, two-family or class a multiple dwelling so as to provide less than 300 cubic feet of air space per occupant, and sets 800 cubic feet per occupant for a whole family dwelling unit. On the Detroit side, § 50-16-201 counts as a family two persons not related by blood, marriage, adoption or guardianship, or two related persons and one person not so related, living as a single housekeeping unit.
Under § 50-12-157 a group of not more than six individuals may claim functional family status, and may not occupy a dwelling as one until the city recognizes the claim in writing. Read the current text of each section before relying on it.
What's Specific to Detroit
Figures are the state rule, or the stronger city ordinance where one exists. Verify the current law for your own situation before relying on it.
Detroit's zoning code starts from the household. § 50-16-172 defines a dwelling unit as one designed and used for residential occupancy by a single family, and § 50-16-201 says who counts. A family includes two persons not related by blood, marriage, adoption or guardianship, or two related persons and one person not so related, living as a single housekeeping unit.
A group outside that definition has a second route. Under § 50-12-157, a group of not more than six individuals may claim functional family status based on a common bond protected by the Fair Housing Act, the Americans with Disabilities Act or the Religious Land Uses and Institutionalized Persons Act.
The claim does not take effect on its own. No group may occupy a dwelling as a functional family until the Buildings, Safety Engineering, and Environmental Department recognizes the claim in writing.
In the R1, R2 and R3 districts, § 50-12-157(c) sets a demanding test. The group must have no more than six members, a "demonstrable and recognizable bond, not of a commercial nature", a single household budget, and regular shared meals and upkeep.
The last element speaks the language of a lease. The members must "legally share in the ownership or possession of the premises, such as being tenants in common on a deed or co-signers of a single lease".
For renters, co-signing one lease is the example the section itself gives. A household planning to claim functional family status has a reason to put every member's name on the lease.
These are land-use rules, and the reading behind this page stops at their text. We describe these zoning sections as enacted and do not predict how the city applies them to a particular household.
Our record does not reach what a zoning definition does to a lease signed by more people than it counts.
The state layer sits alongside the city one. The air-space minimums in MCL 125.483 and the roomer ceiling in MCL 125.402(3a) are separate rules from the zoning family definition, and our record states each as enacted without saying how they interact.
On the notice question itself, our record of the Detroit City Code on Municode, read through a text search for roommate, sublease, sublet and subtenant, finds no Detroit section setting a deadline to tell a landlord about a new occupant.
Municode marks its copy as codified through Ordinance No. 2024-32, effective June 25, 2024. Ordinance No. 2024-55, effective December 19, 2024, re-enacted § 50-16-201 with the same family definition. Read § 50-16-201 and § 50-12-157 as they stand on the day you need them.
The Michigan sections we read set no deadline for telling a landlord about a new roommate, which leaves the lease as the place a deadline would be written.
Under MCL 554.601(g) a tenant occupies "with the landlord's consent". In Detroit, co-signing a single lease is also the example § 50-12-157(c) gives of a group legally sharing possession.
Detroit City Code § 50-16-201 counts two unrelated persons, or two related persons and one unrelated person, as a family. A larger group needs written city recognition under § 50-12-157.
MCL 125.483 sets 300 cubic feet of air space per occupant of a bedroom in a single, two-family or class a multiple dwelling, not counting bathrooms, toilet rooms and closets.
Sources
The law this guide relies on, and where to read it. Statutes change, so confirm the current text before you act on it.
- Mich. Comp. Laws § 554.601; Mich. Comp. Laws § 554.601b; Mich. Comp. Laws § 125.402; Mich. Comp. Laws § 125.483; Detroit City Code § 50-16-201; Detroit City Code § 50-12-157; Detroit City Code § 50-16-172, read on web.archive.org. The Michigan Legislature's page for MCL 554.601, in an archived copy dated November 3, 2025, marks the compiled laws as complete through Public Act 30 of 2025.
Red Flags to Watch Out For
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A state reporting deadline nobody can cite
If you are told Michigan law fixes a deadline for reporting a roommate, ask which section. The Michigan sections we read set no deadline for that notice.
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A third unrelated adult moving in
§ 50-16-201 counts two unrelated persons, or two related persons and one unrelated person, as a family. A landlord's approval is not the city's written recognition under § 50-12-157.
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A functional family assumed, not recognized
Under § 50-12-157 no group may occupy a dwelling as a functional family until the Buildings, Safety Engineering, and Environmental Department recognizes the claim in writing.
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A roommate who never signed
MCL 554.601b(5) speaks of tenants "who are parties to the rental agreement". Someone living there without signing is not a party to the agreement that section describes.
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Bedrooms rented out to roomers
Under MCL 125.402(3a), in single and two-family dwellings the bedrooms rented to roomers "shall not exceed 3" unless the dwelling meets the multiple dwelling rules.
Your Rights as a Detroit Tenant
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Consent is part of being a tenant
MCL 554.601(g) defines a tenant as an individual who occupies a rental unit "with the landlord's consent for an agreed upon consideration."
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Co-tenants after a safety release
Under MCL 554.601b(5), when one tenant is released, "all other tenants who are parties to the rental agreement remain subject to the rental agreement."
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Air space is measured, not asserted
MCL 125.483 sets 300 cubic feet per occupant of a bedroom and 800 cubic feet per occupant of a whole family dwelling unit in single, two-family and class a multiple dwellings.
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A route for a larger household
§ 50-12-157 lets a group of not more than six individuals claim functional family status based on a common bond protected by the Fair Housing Act, the Americans with Disabilities Act or the Religious Land Uses and Institutionalized Persons Act.
What To Do - Step by Step
Read the occupancy and guest paragraphs
Find who may live there, whether approval is needed, and whether a notice period is stated. The Michigan sections we read set no deadline, which leaves those paragraphs as the text that answers it.
Count the household against the city definition
Detroit City Code § 50-16-201 counts two unrelated persons, or two related persons and one unrelated person, as a family. Check where the new person falls before anyone gives notice elsewhere.
Measure the bedroom in cubic feet
Floor area times ceiling height gives the air space. MCL 125.483 sets 300 cubic feet per bedroom occupant, not counting bathrooms, toilet rooms and closets.
Put the request in writing
Email the landlord with the person's full name and planned move-in date. Consent is part of the tenant definition in MCL 554.601(g), so keep the reply with your lease.
Get recognition before a larger group moves in
Under § 50-12-157, a group claiming functional family status may not occupy a dwelling as one until the city recognizes the claim in writing.
Check the current text before relying on it
Read MCL 554.601, § 554.601b and MCL 125.483 as they stand today, and check § 50-16-201 and § 50-12-157 against the current Detroit code. The copy our record read was codified through Ordinance No. 2024-32.