When NYC landlords must send renewal or rent-increase notices — 30, 60, or 90 days — and the documentation that makes the notice enforceable.
Renewal notice timing is one of the easiest things to get wrong in NYC, and one of the most consequential. A late notice can invalidate a rent increase, trigger month-to-month obligations the landlord did not intend, and give a tenant grounds to challenge a non-renewal. The rules are not complicated, but they are strict, and the deadlines do not move.
The basic timing rules
New York law sets advance notice requirements based on how long the tenant has been in the unit. If the tenancy is less than one year, the landlord must give at least 30 days' notice of non-renewal or of a rent increase greater than 5%. If the tenancy is between one and two years, the required notice is 60 days. If the tenancy is two years or more, the required notice is 90 days.
The clock runs from the date the notice is received, not the date it is sent. That distinction matters. A notice mailed on day 90 that arrives on day 87 is not a valid 90-day notice. Landlords who rely on certified mail without accounting for delivery time often miss the window without realizing it.
When the rules apply
The notice requirements apply to most residential tenancies, including market-rate and many regulated units. They cover both non-renewal — refusing to offer a new lease — and material rent increases on renewal. A rent increase of 5% or less on renewal does not require advance notice in the same way, but a clean renewal practice gives notice anyway, because the rule about notice for rent increases above 5% is enforced strictly.
The rules do not apply to evictions for non-payment or other lease violations. Those follow separate notice and proceeding requirements. The renewal notice rules govern the routine end of a lease term, not the early termination of a tenancy for cause.
What the notice must contain
A renewal notice should be specific. Vague language creates ambiguity that a tenant can exploit later. The notice should state the current lease end date, the proposed new lease term, the proposed new rent, the percentage increase if any, and the date by which the tenant must respond. A non-renewal notice should state the date by which the tenant is expected to vacate.
If Good Cause Eviction applies, the renewal notice should also reflect that framework — confirming that the increase is within the reasonable threshold or, if above, that the landlord is prepared to justify it. A non-renewal of a Good Cause-covered unit should state the cause clearly.
The notice should be signed by the landlord or authorized agent and delivered through a method that produces proof of receipt.
How to deliver it
Email delivery is acceptable if the lease authorizes electronic notice and the tenant has consented to email as the notice method. Certified mail with return receipt is the traditional method and remains strong evidence of delivery. Hand delivery with a signed acknowledgment is also valid, though less practical for most landlords.
What does not work is informal delivery. A text message, a verbal conversation, or a note left under the door is not a valid notice. Even if the tenant clearly received it, the lack of formal delivery creates a record problem the landlord cannot easily fix.
The strongest approach combines methods — email with read receipt for speed, plus certified mail for the formal record. The cost is minimal and the evidentiary value is significant.
What goes wrong
The most common failure is timing. The landlord intends to send the notice but underestimates the window. A 90-day notice needs to be drafted, sent, and received 90 days before the lease ends. That means the landlord must be tracking the lease end date months in advance, not reacting to it as it approaches.
The second common failure is delivery method. The notice was sent on time but through a method that cannot be proven. When the tenant later denies receipt, the landlord has no documentation to rebut the claim.
The third failure is content. The notice was sent on time and delivered properly, but the content is ambiguous — the new rent is not clearly stated, the response deadline is missing, or the lease end date is wrong. Ambiguity creates a basis for the tenant to challenge the notice.
What happens when the notice is invalid
If the renewal notice is late, missing, or defective, the landlord generally cannot enforce the rent increase or the non-renewal for the period the notice was deficient. The tenancy continues on the prior terms until a valid notice is given and the required notice period runs.
For a rent increase, that means the landlord cannot collect the higher rent for the months covered by the invalid notice. For a non-renewal, the tenant has the right to remain in the unit. In either case, the practical effect is that the landlord loses control of the calendar — the tenancy moves forward on the tenant's terms, not the landlord's.
How to handle this correctly
Track every lease end date in a single calendar with reminders set to the longest applicable notice window plus a buffer — 120 days out for a 90-day notice, 75 days out for a 60-day notice. The reminder is not for sending the notice. It is for starting the process: confirming the proposed terms, drafting the notice, and arranging delivery.
Send the notice through two methods — electronic for speed and proof of opening, certified for formal delivery. Preserve the delivery confirmations with the lease file. If the tenant responds, preserve the response. If the tenant signs a renewal, preserve the executed renewal with the original lease as part of the same record.
For a non-renewal under Good Cause, document the cause before the notice goes out. A notice that asserts cause the file cannot support is a notice that will be challenged successfully.
Why this is a system problem, not a memory problem
Most landlords who miss renewal notices are not careless. They are managing other priorities, and the notice deadline arrives without warning because nothing in their workflow surfaced it. The fix is a system that tracks lease dates automatically and generates notices on the right schedule, with the right content, through the right delivery method.
A lease platform built for NYC should do this by default — store the lease end date, prompt the renewal workflow in advance of the deadline, generate a compliant notice, send it through a proof-of-delivery channel, and preserve the full record in the lease file. The landlord's job becomes reviewing and approving, not remembering and drafting.
The cost of missing a renewal notice is months of foregone rent increases or a tenancy that continues against the landlord's intent. The cost of a system that prevents the miss is a fraction of that. The math is not subtle.