So first, in NYC a landlord cannot unreasonably deny a request to sublet. You must submit a written request at least 30 days in advance, and it must include things like who you'll be subletting to, why you're wanting to sublet, where you'll be during this period, etc...
If your tenancy doesn't have a fixed end date you'll need your landlord's permission to sublet your whole home. If they say no, they don't have to give you a reason. If there's a fixed end date for your tenancy, you're allowed to sublet your whole home.
If your tenant did not get your permission to sublet and you have a sublet clause in your lease, they have officially broken the lease. This means you can send out a notice to comply or vacate the property. Subletting without permission is cause for eviction, but you aren't required to evict the tenant.
Consent from the landlord A tenant must get a landlord's written permission to sub-let or transfer any part of the property. If a tenant does this without consent, they are breaching the terms of the tenancy agreement.
Yes, they can. If you sublet your unit without your landlord's consent, they have the right to ask you to leave. Subletting without permission can be a violation of the lease agreement, and landlords have the authority to enforce the terms of the lease.
New York City law does not allow tenants that live in multiple dwellings (3 apartments or more) to sublet apartments for less than thirty days. Tenants must receive permission from their landlord in order to sublet their apartment by following a very technical procedure set forth by RPL 226-b.
Building owners dislike competing with their own tenants in their efforts to lease space. As a result, many if not most office leases contain restrictions on subleasing. Among these are: Requirements for landlord consent and approval of the subtenant and the sublease terms.
These laws are designed to deter fraudulent activity and protect landlords from illegal profits made by tenants who sublet their properties without permission. Unauthorized subletting is considered a criminal offense, punishable by law, as it involves a breach of trust and a violation of the landlord-tenant agreement.