How Rent Stabilisation Actually Works
A regulatory system covering a large share of the city's apartments, frequently misunderstood by tenants inside it.

Rent stabilisation covers a substantial portion of New York City's rental housing. Many tenants do not know whether their apartment is covered, which matters because the protections are significant.
What coverage provides
A stabilised tenant has the right to a renewal lease, and increases are limited to amounts set annually by the Rent Guidelines Board rather than by the landlord.
The renewal right is the more valuable protection. A stabilised tenant cannot simply be declined a renewal at the landlord's discretion; the grounds on which a landlord may refuse are limited and defined.
How apartments become covered
Coverage generally arises from a building's age and size, or from a building receiving a tax benefit that carries stabilisation as a condition. That second route means some newer buildings contain stabilised units.
Finding out
A tenant can request the rent history for their apartment from the state agency administering the program. It shows registered rents over time and whether the unit has been registered as stabilised.
This is worth doing. Tenants have discovered through this record that an apartment marketed as market-rate was in fact stabilised.
What changed in recent years
New York substantially revised these laws, tightening the routes by which apartments left regulation and limiting increases previously available for improvements and vacancies. The practical effect was to make deregulation far more difficult than it had been.
This is an area of active litigation and legislative attention. Any specific figure or provision should be checked against the current position rather than assumed from older summaries.
Where to get help
The state agency administering rent regulation handles registrations, rent histories and overcharge complaints. Tenants facing eviction proceedings in New York City may have a right to legal representation depending on the case.
Rent regulation is technical and the details determine outcomes. A tenant with a genuine question should get advice rather than rely on what a neighbour or a landlord says.
This is general information, not legal advice. Speak to a qualified New York attorney before acting on any of it.