A good renter's lease is ending and both of you want to continue. The next question sounds like paperwork but has real consequences: do you renew, extend, or sign a new lease? The choice affects which terms carry forward, what happens to the security deposit, how rent changes are noticed, and whether you can screen anyone again.
This guide defines each option, explains the legal effect on terms, deposits, rent and notices, covers when a new application is appropriate, walks through roommate changes and rent-regulated or just-cause jurisdictions, and ends with a decision table. It is part of our lease renewal guides for independent landlords.
Note: This article is general education, not legal advice. Contract terms, notice periods, deposit rules and rent regulation vary by state and city, and statutes cited are as of November 2026. Consult a local attorney before you change lease terms or decline to renew.
Lease renewal vs lease extension vs new lease: the short answer
An extension keeps the current lease and moves its end date. A renewal starts a new term for the same renter and the same unit, usually with a fresh signature and sometimes updated terms. A new lease is a completely new contract, used when the people, the unit or the terms change enough that the old lease no longer fits.
These labels are not defined the same way everywhere, and many leases use "renew" and "extend" loosely. What matters legally is what the documents say and what your state's law does with them. Use the definitions below as working terms, and make your documents say exactly what you intend.
Lease extension
A short written amendment that changes the end date of the existing lease, and possibly the rent, while everything else stays the same. The original lease and any earlier addenda remain in force. Extensions suit short, defined periods, such as three months to line up with a renter's job move or to shift expirations away from winter.
Lease renewal
A new term for the same parties and unit, usually created by a renewal agreement or a new signed lease that incorporates or restates the original terms with specific updates, most often rent. Some leases contain a renewal option the renter can exercise on stated conditions; if yours does, follow its terms and deadlines.
New lease
A fresh contract that replaces the old one entirely. It is the right tool when a roommate leaves or joins, the renter moves to another unit, your lease form has changed significantly, or you need to correct problems in the old document.
Side-by-side comparison
| Question | Extension | Renewal | New lease |
|---|---|---|---|
| Which document governs? | Original lease plus amendment | Renewal agreement, often incorporating the original | The new lease only |
| Can terms change? | Usually only end date and rent | Yes, the terms you specify | Yes, all terms |
| Parties | Same people | Same people | Can add or remove people |
| Security deposit | Stays in place | Usually carried over, in writing | Carry over by written agreement, or close out and collect anew |
| Fresh screening | Rarely | Optional, with consent | Common for any new adult |
| Paperwork effort | Lowest | Moderate | Highest |
| Best for | Short, defined add-on periods | Standard annual continuation | Changed occupants, unit or lease form |
Legal effect on lease terms
The key difference is what carries forward automatically. With an extension, every clause of the old lease continues unless the amendment changes it. With a new lease, only what is written in the new lease applies.
That cuts both ways. An extension preserves clauses you want, such as a pet agreement or a lawn-care responsibility, without retyping them, but it also preserves any outdated or unenforceable clause. A new lease lets you update your form, add required disclosures and fix errors, but anything you forget to include is gone.
Before you choose, read the old lease for:
- Renewal or extension clauses that set the renter's rights, notice deadlines or how rent will be set.
- Automatic renewal or holdover language that says what happens if nobody acts, such as conversion to month to month.
- Addenda such as pet, parking, utility or lead-based paint disclosures, and whether they reference the original term dates.
- Guarantor agreements. A co-signer's guarantee may be tied to the original term. Have the guarantor sign the extension, renewal or new lease if you want the guarantee to continue.
Security deposits at renewal
For extensions and renewals with the same renters, the deposit normally stays where it is and continues to secure the lease. For a new lease, decide explicitly whether the deposit carries over, and put that decision in writing.
- Carry over. State in the new lease or renewal the amount held, the date it was originally collected and that it now secures the new lease. This avoids a move-out style accounting when nobody is moving out.
- Close out and re-collect. If the old tenancy truly ends, for example because the renter moves to another unit, follow your state's deposit return and itemization rules for the old lease, then collect a new deposit.
- Increase the deposit. If you raise the deposit, the total must stay within any state or local cap. Some states also require deposit interest or specific account handling.
Our guide to security deposit laws by state covers limits and return deadlines.
Rent changes and required notices
Notice rules attach to the rent change or non-renewal itself, whichever document you use. Calling an increase an extension or a renewal does not shorten the notice you owe.
Two examples show how specific these rules get:
- New York. Under Real Property Law 226-c, a landlord who intends to renew with a rent increase of 5 percent or more, or not to renew, must give written notice: at least 30 days if the renter has lived there under one year and has no lease of at least one year, 60 days for one to two years, and 90 days for more than two years or a lease of at least two years. If the landlord fails to give timely notice, the tenancy continues under the existing terms until the notice period runs from the date notice was actually given.
- California month-to-month tenancies. Under Civil Code 827, a rent increase of 10 percent or less, counting other increases in the prior 12 months, needs at least 30 days' notice, and an increase above 10 percent needs at least 90 days' notice.
Rent caps, local ordinances and lease clauses can add more. Work out the deadline from the expiration date backward and send your offer early. Our guides on writing a lease renewal offer letter and a rent increase notice cover the wording.
When a new application or screening is appropriate
Re-screening a renter you are renewing is optional in most situations, and screening any new adult who will sign the lease is standard practice. The FTC says landlords may get consumer reports on applicants and tenants who apply to rent housing or renew a lease, and may also get written permission to show a permissible purpose.
When re-screening makes sense:
- A new adult is joining the lease.
- The renter is moving to a different unit with materially higher rent.
- Your original screening was incomplete, or the guarantor is being released.
When it usually does not: a renter with a clean payment record renewing in place. Re-screening a reliable renter costs goodwill and money, and any information you act on carries obligations. The FTC treats requiring a co-signer, requiring a larger deposit, or charging higher rent based even partly on a consumer report as adverse action, which requires a notice naming the reporting company and explaining the renter's right to a free report and to dispute errors.
Apply the same re-screening policy to every renter in the same situation. Selective re-screening invites fair housing questions.
When roommates change
When someone leaves or joins, a simple extension is rarely enough, because the people bound by the lease are changing. Use a new lease, or at minimum a written amendment signed by every remaining and new party, that states who is on the lease from what date.
- Screen the incoming adult with written consent, using your standard criteria.
- Get a written release or confirmation for the departing renter, specifying whether they remain liable for anything before their departure date.
- Decide how the deposit is handled. Many landlords keep the full deposit in place and let roommates settle shares between themselves, documented in writing.
- Have all current parties sign the new lease or amendment so nobody can later say they never agreed.
See our guide to adding or removing a roommate on a lease for joint liability and deposit details.
Rent-regulated and just-cause jurisdictions
In rent-regulated or just-cause areas, the choice between renewal, extension and new lease may not be yours alone. Some laws require you to offer a renewal, limit what can change, or restrict ending a tenancy at the end of a term.
- New York rent stabilization. According to the state's housing agency (DHCR fact sheet 4, April 2023), owners must offer a renewal between 90 and 150 days before expiration in New York City (90 to 120 days elsewhere), the renter chooses a one or two year term, the renter has 60 days to respond, and renewal leases must keep the same terms and conditions as the expiring lease unless a law or regulation requires a change.
- New York Good Cause Eviction. The state Attorney General's guide explains that for covered units a renewal offer must come 30, 60 or 90 days before expiration, and an offer with an unreasonable rent increase or changed substantive terms, such as suddenly barring pets, is not reasonable. Landlords who own 10 or fewer units in the state are exempt as small landlords, among other exemptions.
- Other just-cause laws. Several states and cities limit ending a tenancy without a stated cause once a renter has been in place for a set period. Refusing to renew, or offering a new lease with very different terms, can be restricted.
Read our overview of just-cause eviction laws and confirm the rules for your city before you plan a renewal strategy.
Documentation checklist
Whatever you choose, the paperwork should leave no doubt about who agreed to what, for which dates, at what rent.
- A signed document from every adult party, including guarantors where relevant.
- Exact start and end dates, rent, due date and any changed charges.
- A sentence stating which earlier documents remain in force.
- The deposit amount held and whether it carries over.
- Copies of the renewal offer, the notice you sent and proof of delivery.
- Any updated disclosures your state or city requires.
Store all of it with the original lease so the full history is in one place. Our lease renewal management guide covers the timeline from first conversation to signature.
Decision table: which document should you use?
| Situation | Recommended document | Why |
|---|---|---|
| Same renters, same unit, new 12-month term, rent change only | Renewal agreement | Keeps terms, updates rent, gives a clean new term |
| Same renters need two to six extra months | Extension amendment | Least paperwork; original lease stays in force |
| A roommate leaves or a new adult joins | New lease | Changes the parties and resets liability |
| Renter moves to another unit you own | New lease | Different premises; handle deposit transfer in writing |
| Your lease form is outdated or missing disclosures | New lease | Replaces old clauses instead of layering amendments |
| Rent-stabilized unit | The renewal form the regulation requires | Terms and timing are set by rule |
| Nobody has acted and the lease is about to expire | Check holdover clause and state law first | An unsigned continuation may default to month to month |
Illustrative example: a renter pays $1,600 a month on a lease ending June 30. In March you agree a $1,664 rent (a 4 percent increase) for a new 12-month term. A renewal agreement that states the new rent, the new dates, that the $1,600 deposit carries over and that all other terms continue does the job in one page. If in May one of two roommates announces they are leaving, switch to a new lease signed by the remaining renter and any incoming roommate after screening.
Frequently asked questions
What is the difference between a lease renewal and a lease extension?
A lease extension usually pushes back the end date of the existing lease through a written amendment, so the original lease stays in force. A lease renewal usually starts a new term, often with a new signed document that can update rent and other terms. The labels are not used consistently, so your lease wording and state law decide the legal effect.
Do I need to re-screen a tenant when renewing a lease?
No law generally requires it, and many landlords skip it for renters with a good payment history. The FTC says landlords may get consumer reports on tenants who apply to renew a lease, but if a report leads you to raise rent, require a co-signer or ask for a larger deposit, you must give an adverse action notice.
Does a new lease mean a new security deposit?
Not necessarily. You can carry the existing deposit over to the new lease and record that in writing, or treat the old tenancy as ended, handle the deposit under your state's return rules and collect a new one. Any increase must stay within your state's deposit limits.
Can I change lease terms at renewal?
In most places you can propose new terms at the end of a fixed term, but notice rules still apply and some jurisdictions restrict changes. New York's rent-stabilized renewal leases, for example, must keep the same terms and conditions as the expiring lease unless a law or regulation requires a change.
What happens if a lease expires and nobody signs anything?
In many states the tenancy continues as month to month on the same terms if the renter stays and you keep accepting rent, but the rules vary by state and by what the lease says about holdover. Check your lease and state law rather than relying on an unsigned arrangement.
What to do next
Most renewal problems are timing problems: the landlord learns too late whether a renter is staying, the notice deadline passes, or the signed paperwork never matches what was agreed. A clear pipeline and complete records solve most of them.
Shuk does not draft lease, renewal or extension documents; you prepare them outside Shuk and upload them. Shuk's Lease Indication Tool sends renters polls at 6, 5, 4 and 3 months before lease end so you learn their renewal intentions early, and lease management tracks start and end dates, renewal status, recurring charges and deposits across properties. E-Lease and Document Signing sends your renewal or new lease for unlimited e-signatures with an audit trail of who signed and when, Rental Screening handles screening for a new roommate, and Property Documents and the Document Center keep the full lease history in one place.
At as low as $2 per unit per month, with no setup fees and no contract, and with White Glove Onboarding included at no additional cost, Shuk makes on-time, well-documented renewals feasible for landlords and property managers up to 300 units.
Book a demo at shukrentals.com/book-a-demo to see how the Lease Indication Tool, lease management and Document Signing work together so every renewal is decided early and signed on time.
