Subletting Rules for Landlords: Consent, Screening and the Sublease Agreement

Your lease is where subletting rules start. A good sublet clause says the tenant can't sublet or assign without your written consent, explains how to ask, lets you screen the proposed subtenant the same way you screen any applicant, and keeps the original tenant responsible for rent and damage while the subtenant lives there. When you do approve a sublet, put it in writing with a sublease agreement and a short consent letter, and keep the original lease in force.

This guide covers the difference between a sublet, an assignment and a new roommate, what to put in the lease clause, how to handle a request, screening and deposits, short-term rentals, and what to do about an unauthorized sublet.

Sublet, assignment or new roommate?

These three arrangements look similar from the outside but put different people on the hook:

If you want the newcomer directly responsible to you, the cleanest approach is often to add them to the lease, or sign a new lease with them, rather than approve a sublet. A sublet keeps your relationship with the original tenant and leaves the subtenant's relationship with the tenant.

What to put in the lease

A clear clause prevents most sublet problems. Cover:

1. Consent required. No subletting, assignment or transfer of any part of the unit without your prior written consent.
2. How to request. In writing, a set number of days before the proposed start, with the subtenant's name, contact details, dates and a completed application.
3. Screening. The subtenant must meet your usual written criteria.
4. Responsibility. The original tenant remains responsible for rent, damage and lease compliance during the sublet.
5. Term. No sublet can run past the end of the lease.
6. Rent. Whether the tenant can charge the subtenant more than the lease rent.
7. Short-term rentals. Whether nightly or weekly rentals through booking platforms are allowed (most landlords say no).
8. Fees. Any fee for processing a sublet request, if your state allows it.
9. Unauthorized sublets. Treated as a lease violation.

Check your state and city before relying on a flat ban or an "in our sole discretion" consent standard; some places have their own rules on how landlords handle sublet requests. New Jersey, for example, has capped what a landlord or agent may charge someone applying to rent or sublease a home at $50 since May 1, 2026, except for units in one- or two-family dwellings (N.J.S.A. 46:8-18.1, P.L.2025, c.405). Build the clause into a new lease with the lease agreement generator, or add it to an existing lease with a signed lease amendment.

Handling a sublet request

When a tenant asks to sublet:

1. Get it in writing, with the proposed subtenant's name, dates, and the part of the unit they'll occupy.
2. Have the subtenant complete your standard application. Use the same rental application form and criteria you use for any applicant, and respect any state cap on application fees. Our tenant screening checklist covers the steps.
3. Apply your criteria consistently. Approving or refusing sublets based on who the subtenant is, rather than on your written criteria, raises fair housing risk. See fair housing laws for landlords.
4. Answer promptly and in writing. If you refuse, give the reason based on your criteria.
5. If you approve, document it: a signed consent letter from you, and a sublease agreement between the tenant and subtenant.

The consent letter

Keep it short. It should identify the lease, name the subtenant, state the sublet dates, confirm the original lease stays in full force, and say that the original tenant remains responsible for rent and any damage. Have the tenant sign it too.

The sublease agreement

The tenant and subtenant sign this between themselves, but you want a copy and you want it to match your lease. It should:

• Incorporate the original lease and any addenda, so the subtenant agrees to follow the same rules.
• State the sublet dates, rent, and how it's paid.
• Say what happens to the subtenant's deposit (held by the tenant, not you, unless you agree otherwise).
• Include a move-in condition checklist for the subtenant's area.

You can fill in a sublease agreement, preview it and print it for the parties to sign.

Deposits during a sublet

The original tenant's security deposit stays with you and stays tied to the original lease. A subtenant's deposit is normally between the subtenant and the tenant. Before the sublet starts, do a walkthrough with the original tenant and photograph the unit on a move-in/move-out checklist. When the original tenant's lease ends, you return their deposit under your state's rules, with deductions for any damage the subtenant caused. Our deposit return guide covers the deadlines.

Short-term and vacation rentals

Tenants listing a unit nightly on a booking platform is a different risk from a traditional sublet: constant turnover, strangers in the building, insurance gaps, and possible violations of local short-term rental rules, HOA rules or your mortgage. Short-term rentals are often regulated at the city or county level, so check local rules before you allow them.

If you don't want short-term rentals, say so expressly in the lease: "Tenant may not rent or offer the premises, or any part of them, for occupancy of fewer than [30] days, including through any online booking platform." If you do allow them, put the conditions in a written addendum and check with your insurer first.

Unauthorized sublets

If you discover someone living in the unit without your consent:

1. Document it: who is there, since when, how you learned about it.
2. Talk to the original tenant. Sometimes it's a misunderstanding (a long-term guest, a new partner).
3. Decide what you want. You might approve the arrangement after screening, add the person to the lease, or require them to leave.
4. Serve a written lease violation notice with your state's required cure period if the tenant doesn't resolve it. Our guide to handling a lease violation has templates and the notice rules by state.
5. Don't confront or remove the occupant yourself. Someone the tenant let in is not a squatter; removing them goes through the tenant and, if necessary, the courts. See squatters vs tenants.

Don't accept rent directly from an unapproved subtenant while you're deciding. It can muddy who you've agreed to rent to.

When a roommate agreement fits better

If your tenant wants to bring in a roommate for the rest of the lease, a sublet may not be the right tool. Instead, screen the roommate and add them to the lease as a co-tenant, then have the roommates sign a roommate agreement covering their shares of rent and bills between themselves. Renting to roommates covers joint leases and replacing a roommate.

A hypothetical example

A hypothetical example: a tenant on a 12-month lease gets a four-month work assignment abroad and asks to sublet the apartment from February through May. The landlord asks for the subtenant's application, screens them against the same written criteria as every applicant, and approves. The landlord signs a consent letter stating the original lease stays in force and the tenant remains responsible for rent and damage. The tenant and subtenant sign a sublease agreement incorporating the lease and house rules. The landlord and tenant photograph the unit before the subtenant moves in.

In May the subtenant leaves, the tenant returns, and the lease continues. When the tenant eventually moves out, any damage the subtenant caused is handled through the tenant's deposit like any other damage.

Sources

Official sources cited above (checked 2026-10-27):

• New Jersey P.L.2025, c.405 (N.J.S.A. 46:8-18.1)
• New Jersey DCA, Truth in Renting