Subletting Clause
in Your Lease
What it actually means, what Missouri law says, what's specific to Kansas City - and exactly what to do. In plain English.
Quick Summary - What You Need to Know
- No section in our record of Missouri Revised Statutes chapters 441 and 535 gives a landlord a deadline to answer a written sublet request. The sublet paragraph of the lease is the document that sets any reply period.
- Mo. Rev. Stat. § 441.030 says no tenant for a term not exceeding two years, or at will, or by sufferance, shall assign or transfer the term "or any part thereof, to another without the written assent of the landlord".
- Breaking that rule can cost the tenancy. Under § 441.040 the landlord, after giving ten days' notice to vacate, has a right to retake possession and to oust a subtenant or undertenant by the procedure specified by law.
- A subtenant is drawn into the landlord's actions. § 441.230 lets the landlord join the lessee and all sublessees as defendants, and under § 441.220 no undertenant is liable for rent that fell due before their interest began.
- Kansas City requires a notarized affidavit from the property owner before a non-owner can register a short-term rental under § 56-803(2)f., and § 56-807(a) makes operating an unregistered one a violation.
Understanding the Subletting Clause
A sublet clause decides whether someone else may take over your Kansas City unit for part of the term, what you must ask first, and how long the landlord may take to answer. On the reply period, no section in our record of Missouri's chapters 441 and 535 sets a deadline.
What Missouri does set is a form. Mo. Rev. Stat. § 441.030 requires the landlord's written assent before a tenant for a term of two years or less, or at will, or by sufferance, assigns or transfers any part of the term.
None of the sections we read names a time for the answer or a standard for a refusal.
Kansas City adds a rule for short stays. A tenant who wants to offer the unit to guests for less than 30 consecutive days needs a notarized affidavit from the property owner to register it as a short-term rental.
The Missouri text behind this page was read on archived copies of the Revisor of Statutes' own pages. Read § 441.030 on revisor.mo.gov before you rely on it.
What renters assume
That Missouri gives a Kansas City landlord a set number of days to answer a sublet request, and that a landlord who stays silent has said yes.
What is actually true
No section in our record of chapters 441 and 535 sets a reply period, and nothing in the sections we read turns silence into assent. § 441.030 asks for the landlord's written assent. New York City's row in the comparison carries 30 days; Kansas City's reads no deadline; written assent required.
The bars in the comparison on this page measure a landlord's deadline to answer a written sublet request. One of the 23 rows carries a figure: New York City, at 30 days. The other 22 rows are blank.
Eleven of those read no statute: Austin, Los Angeles, Seattle, Atlanta, Phoenix, Denver, Miami, Nashville, Philadelphia, Boston and Las Vegas. Chicago and Portland read no deadline, and Charlotte, Baltimore and Minneapolis no set deadline.
Washington, DC reads no deadline, lease may bar it, Columbus no statute; lease controls, Newark no deadline; city bars short-term sublets, Detroit no deadline; lease controls and Milwaukee no deadline; lease may restrict.
Kansas City's row reads no deadline; written assent required. The assent comes from § 441.030, and any reply period comes from the lease.
Plain English Version
If your lease term is two years or less, Missouri law says you need your landlord's written assent before you hand any part of the lease to someone else. The Missouri sections we read give the landlord no deadline to answer, so read your sublet paragraph first.
A sublet without assent can let the landlord move to take the unit back after ten days' notice to vacate. In Kansas City, a tenant offering the unit for short stays also needs the owner's notarized permission to register it.
Sublet Clause Example - What the Wording Looks Like in Kansas City, MO
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.
Occupancy of Premises — Tenant shall not assign nor underlet any part or the whole of the premises, nor shall permit the premises to be occupied for a period longer than a temporary visit by anyone except the individuals specifically named in the first paragraph of this tenancy, their spouses, and any children born to them hereafter, without first obtaining on each occasion the assent in writing of Landlord.
Quoted from the published opinion in Slavin v. Rent Control Board of Brookline, 406 Mass. 458, 548 N.E.2d 1226 (1990). Judicial opinions are not subject to copyright; the lease language is reproduced in limited part for commentary under 17 U.S.C. § 107.
“Tenant shall not assign nor underlet”
Missouri's statute uses close to these verbs. § 441.030 says no tenant for a term not exceeding two years, or at will, or by sufferance, shall “assign or transfer his term or interest, or any part thereof, to another without the written assent of the landlord”. § 441.230 then speaks of a tenant who shall “sublet any premises or any part thereof demised or let to him”, so the chapter knows both moves this lease forbids.
“premises, nor shall permit the premises to be”
Letting others occupy the premises for pay is where a sublet meets Kansas City's short-term rental rules. A dwelling unit offered to guests for remuneration for less than 30 consecutive days is a short-term rental under § 56-802. A tenant who is not the owner must provide “a notarized affidavit from the property owner allowing the proposed registrant to conduct a short-term rental within the dwelling unit” under § 56-803(2)f.
“anyone except the individuals specifically named in the first”
The named individuals are the people a landlord sues first, and Missouri adds the people under them. § 441.230 lets the landlord, in any action under chapters 441 and 535, “join as party defendants his lessee and all sublessees in the same action”. § 535.010 lets a landlord, on default in rent, “dispossess the tenant and all subtenants”.
“the assent in writing of Landlord”
Missouri's statute asks for the same form, and the Massachusetts court read these words without adding a duty to be reasonable. That holding is Massachusetts law. In Missouri, § 441.030 requires “the written assent of the landlord”, and no section in our record of chapters 441 and 535 sets a reply period or a standard for a refusal. New York's row in the comparison carries 30 days; Kansas City's carries none.
The landlord did not have to be reasonable, and the tenant lost. The Supreme Judicial Court read this clause and refused to add anything to it: a residential lease requiring the landlord's written assent before an assignment, an underletting or an additional occupant carries no implied duty to act reasonably. Absent express lease language - or a statute - saying consent will not be unreasonably withheld, the landlord may refuse arbitrarily, so a blanket refusal to accept any replacement occupant did not excuse the tenant's breach. The annulment of the rent board's decision was affirmed and the certificate of eviction ordered to issue. The court knew it was declining a trend: it found no demonstrable trend involving residential leases, reasoned that in a rent-controlled town a landlord has little economic incentive to withhold consent, warned that the opposite rule would generate a plethora of litigation, and handed the question to the Legislature - noting in a footnote that four states had already legislated, New York's Real Property Law § 226-b among them. Two limits belong with the holding. The disposition was not a clean sweep: the court reversed the Appellate Division's award of double costs and attorneys' fees even as it affirmed the annulment. And the closing footnote says the court makes no suggestion about the rule it might adopt in other contexts - this is a rule about residential leases and nothing wider.
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.
Missouri Law on Subletting Clause
- A tenant whose term is two years or less, or who holds at will or by sufferance, needs the landlord's written assent, and the statute sets no time for giving it. Mo. Rev. Stat. § 441.030 provides that "No tenant for a term not exceeding two years, or at will, or by sufferance, shall assign or transfer his term or interest, or any part thereof, to another without the written assent of the landlord; neither shall he violate any of the conditions of his written lease, nor commit waste upon the leased premises." The section covers terms of two years or less and tenancies at will or by sufferance, and it says nothing about how a request is made or how long the landlord has to answer.
- Breaking the rule can cost the tenancy after ten days' notice. Mo. Rev. Stat. § 441.040 provides that "If any tenant violates the provisions of section 441.020 or 441.030, the landlord, or person holding under the landlord, after giving ten days' notice to vacate the premises, shall have a right to reenter the premises and take possession of the premises, or to oust the tenant, subtenant or undertenant of any person on the premises with the permission of the lessee, sublessee or underlessee by the procedure specified by law." Section 441.630(5), among the housing code nuisance abatement sections, likewise says an occupant "Shall not under any circumstances take in additional occupants, sublease, rent or turn over said premises to any persons without the owner's knowledge and consent."
- A subtenant is drawn into the landlord's rent and possession actions. Mo. Rev. Stat. § 441.230 provides that "In case any tenant shall sublet any premises or any part thereof demised or let to him, the landlord shall have the right, in any action provided for by this chapter and chapter 535, to join as party defendants his lessee and all sublessees in the same action." Under § 441.220, rent may be recovered from the lessee "or his assignee or undertenant", but "no assignee or undertenant shall be liable for rent which became due before his interest began", and § 535.010 lets the landlord, on default in rent, "dispossess the tenant and all subtenants".
- Kansas City requires the owner's sworn permission for a short-term sublet. Kansas City Code of Ordinances § 56-803(2)f. requires "Proof of possession of the short-term rental, either by valid warranty deed, valid lease, or other verification of the proposed registrant's right to possession of the dwelling unit. If the proposed registrant does not own the dwelling unit, they must also provide a notarized affidavit from the property owner allowing the proposed registrant to conduct a short-term rental within the dwelling unit." Section 56-802 defines a short-term rental as a dwelling unit offered "as lodging accommodations to guests in exchange for remuneration for a period of less than 30 consecutive days", and § 56-803(1) sets a yearly registration fee of $200.00.
Sources include Mo. Rev. Stat. § 441.030; Mo. Rev. Stat. § 441.040; Mo. Rev. Stat. § 441.630; Mo. Rev. Stat. § 441.220; Mo. Rev. Stat. § 441.230; Mo. Rev. Stat. § 535.010; Mo. Rev. Stat. § 441.043; Kansas City Code of Ordinances § 56-802; Kansas City Code of Ordinances § 56-803; Kansas City Code of Ordinances § 56-807; Kansas City Code of Ordinances § 38-1; Kansas City Code of Ordinances § 38-105 - statutes change; verify the current text for your situation.
No section in our record of Missouri Revised Statutes chapters 441 and 535 gives a landlord a deadline to answer a written sublet request. That is a statement about the sections we read, not a survey of the state's code, and it leaves the sublet paragraph of the lease as the document that sets any reply period.
What Missouri does write is a consent requirement. Mo. Rev. Stat. § 441.030 provides that "No tenant for a term not exceeding two years, or at will, or by sufferance, shall assign or transfer his term or interest, or any part thereof, to another without the written assent of the landlord".
The section's reach is set by its own words: terms of two years or less, and tenancies at will or by sufferance. It says nothing about how a request is made or how long the landlord has to answer, and none of the sections we read sets a standard for a refusal.
The consequence is about possession. Under § 441.040, if a tenant violates § 441.030, the landlord, "after giving ten days' notice to vacate the premises", has a right to reenter and take possession, or to oust the tenant, subtenant or undertenant by the procedure specified by law.
Subtenants are named across the chapter. § 441.230 lets the landlord, in any action under chapters 441 and 535, "join as party defendants his lessee and all sublessees in the same action." § 535.010 lets the landlord, on default in rent, "dispossess the tenant and all subtenants".
Rent follows the interest. Under § 441.220, rent may be recovered from the lessee "or his assignee or undertenant", but "no assignee or undertenant shall be liable for rent which became due before his interest began".
A second consent rule sits among the housing code receivership sections. § 441.630(5) says an occupant "Shall not under any circumstances take in additional occupants, sublease, rent or turn over said premises to any persons without the owner's knowledge and consent." Its opening words tie it to those nuisance abatement sections, and our record does not settle whether it reaches beyond them.
Read § 441.030 and § 441.040 on revisor.mo.gov, since the copies behind this page are archived.
Missouri Tenant Protections
On a Kansas City sublet, Missouri supplies a consent rule and its consequences, and Kansas City supplies a short-term rental rule and a fair housing definition; none of them sets a reply date. Mo. Rev. Stat. § 441.030 says no tenant for a term not exceeding two years, or at will, or by sufferance, shall assign or transfer the term or interest, or any part of it, to another without the written assent of the landlord.
Under § 441.040 a landlord whose tenant breaks that rule may, after ten days' notice to vacate, reenter and take possession or oust the tenant, subtenant or undertenant by the procedure specified by law. Section 441.230 lets the landlord join the lessee and all sublessees as defendants in one action, and § 535.010 lets a landlord dispossess the tenant and all subtenants on default in rent.
Section 441.220 makes rent recoverable from an assignee or undertenant, but not rent that became due before that person's interest began. In Kansas City, § 56-803(2)f. requires a person registering a short-term rental of a dwelling unit they do not own to provide a notarized affidavit from the property owner.
Section 56-802 defines a short-term rental as one offered to guests for less than 30 consecutive days, and § 56-807(a) makes operating an unregistered one a violation.
Section 38-1(27) defines rent to include sublease, and § 38-105(d)(1) makes it unlawful to refuse to rent or otherwise deny a dwelling to any person because of a protected trait listed in § 38-105(b). Read the current text of each section before relying on it.
What's Specific to Kansas City
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.
On subletting, Kansas City's code speaks directly about short stays. Article VIII of Chapter 56, enacted by Ordinance No. 250965 on November 13, 2025, registers short-term rentals. § 56-802 defines one as a dwelling unit offered as lodging to guests for remuneration "for a period of less than 30 consecutive days".
A tenant is not an owner under that article. § 56-802 says a person whose interest is solely that of a tenant, subtenant, lessee or sublessee is not an owner. A tenant who wants to register must show possession and, under § 56-803(2)f., provide "a notarized affidavit from the property owner allowing the proposed registrant to conduct a short-term rental within the dwelling unit."
Registration has a price and a penalty. § 56-803(1) sets a yearly registration fee of $200.00, and § 56-807(a) makes operating an unregistered short-term rental a violation. The owner's affidavit is a city requirement, and it stands beside, not in place of, the landlord's written assent under Mo. Rev. Stat. § 441.030 where that section applies.
Two figures in that article are easy to misread. Thirty consecutive days is the line between a short-term rental and a longer stay, and $200.00 is the yearly fee; neither is a deadline for a landlord's answer.
A sublet for a longer stay falls outside that definition's 30-day line, which leaves the lease and § 441.030 as the texts to read.
Kansas City's civil rights chapter also uses the word. § 38-1(27) defines rent to include to "sublease", and § 38-105(d)(1) makes it unlawful to refuse to rent or otherwise deny a dwelling to any person because of a protected trait listed in § 38-105(b). We describe those sections as enacted and do not say how they apply to a particular sublet.
On the reply question, our record of the Kansas City Code of Ordinances finds no section setting a deadline for a landlord to answer a sublet request. A Municode text search for sublease returned three sections, on special sale licenses, the municipal public market and the civil rights definitions in § 38-1, and a search for sublet returned one, on cable franchises.
Municode marks that code as codified through Ordinance No. 260342, enacted April 16, 2026 (Supplement 139). Read § 56-803 and § 38-105 as they stand on the day you need them.
Missouri's § 441.043, in the version effective August 28, 2025, lists subjects a city may not regulate between landlord and tenant, and subletting is not among them. We describe the Kansas City sections as enacted and take no position on how § 441.043 applies to them.
No section in our record of Missouri's chapters 441 and 535 sets one, which leaves the clause as the place a reply date would be written.
That matches § 441.030, which requires "the written assent of the landlord" for a term not exceeding two years, or at will, or by sufferance.
Kansas City treats a stay that short as a short-term rental. § 56-803(2)f. requires a notarized affidavit from the property owner before a non-owner can register one.
§ 441.040 gives a landlord a right to reenter after ten days' notice to vacate where § 441.030 is broken. Get the assent on paper before the subtenant arrives.
Sources
The law this guide relies on, and where to read it. Statutes change, so confirm the current text before you act on it.
- Mo. Rev. Stat. § 441.030; Mo. Rev. Stat. § 441.040; Mo. Rev. Stat. § 441.630; Mo. Rev. Stat. § 441.220; Mo. Rev. Stat. § 441.230; Mo. Rev. Stat. § 535.010; Mo. Rev. Stat. § 441.043; Kansas City Code of Ordinances § 56-802; Kansas City Code of Ordinances § 56-803; Kansas City Code of Ordinances § 56-807; Kansas City Code of Ordinances § 38-1; Kansas City Code of Ordinances § 38-105, read on web.archive.org. The Missouri Revisor of Statutes page for this section, read in a Wayback Machine copy captured May 17, 2026, shows the version effective August 28, 1939 with the history line RSMo 1939 § 2967.
Red Flags to Watch Out For
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A spoken yes and nothing more
§ 441.030 asks for "the written assent of the landlord". A conversation in the hallway is hard to show later, and it is not the form the section names.
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No reply date anywhere
No section in our record of chapters 441 and 535 sets a reply period. Keep the written request and the date you sent it, since the lease is the text that sets any deadline.
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A subtenant left out of the picture
§ 441.230 lets the landlord join the lessee and all sublessees as defendants in one action. A subtenant should know that before moving in.
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Ten days to leave
§ 441.040 gives a landlord a right to reenter after ten days' notice to vacate when § 441.030 is broken, and to oust a subtenant or undertenant by the procedure specified by law.
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A short-stay listing without the owner's affidavit
§ 56-803(2)f. requires a notarized affidavit from the property owner for a non-owner to register, and § 56-807(a) makes operating an unregistered short-term rental a violation.
Your Rights as a Kansas City Tenant
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No back rent before a subtenant arrived
Under § 441.220, "no assignee or undertenant shall be liable for rent which became due before his interest began".
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The form of consent is fixed
§ 441.030 names "the written assent of the landlord" for a term not exceeding two years, or at will, or by sufferance, so ask for the answer on paper.
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Notice before reentry
§ 441.040 gives the landlord a right to reenter for a breach of § 441.030 after ten days' notice to vacate, and by the procedure specified by law.
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Fair housing reaches a sublease
§ 38-1(27) defines rent to include to sublease, and § 38-105(d)(1) bars refusing to rent or otherwise denying a dwelling because of a protected trait listed in § 38-105(b).
What To Do - Step by Step
Read the sublet paragraph and your term
Check whether your term is two years or less and whether the paragraph names a reply date. § 441.030 sets the written assent rule for those terms, and no section in our record sets a reply period.
Send a written request with a date on it
Name the subtenant, the dates and the rent, and ask for the answer in writing, since § 441.030 speaks of "the written assent of the landlord".
Wait for written assent before anyone moves in
Under § 441.040, a breach of § 441.030 gives the landlord a right to reenter after ten days' notice to vacate.
Tell the subtenant what they are joining
§ 441.230 lets the landlord sue the lessee and all sublessees together, and § 441.220 makes a subtenant answer for rent from the day their interest began.
Register a short stay with the owner's affidavit
For less than 30 consecutive days, § 56-803(2)f. requires a notarized affidavit from the property owner, and § 56-803(1) sets a yearly fee of $200.00.
Confirm the current text
Read § 441.030, § 441.040 and § 441.230 on revisor.mo.gov, and § 56-803 and § 38-105 in Kansas City's current code.