How the Housing Stability and Tenant Protection Act Changed Apartment Deregulation

If you are a renter in New York, the summer of any given year can feel like a season of uncertainty. Leases come up for renewal, landlords reassess their properties, and tenants wonder whether their stabilized apartment will still be protected when fall arrives. For decades, one of the most significant fears for New York renters living in rent-stabilized apartments was the threat of deregulation — the legal process by which a landlord could remove a unit from rent stabilization entirely, leaving the tenant exposed to market-rate rents. That fear, while not entirely eliminated, was dramatically transformed by a single piece of legislation: the Housing Stability and Tenant Protection Act of 2019. Understanding how the Housing Stability and Tenant Protection Act changed apartment deregulation is not just a matter of historical interest — it is essential knowledge for any tenant or landlord navigating the New York rental market today.

What Apartment Deregulation Looked Like Before 2019

To fully appreciate the magnitude of the 2019 law, it helps to understand the landscape that existed before it passed. Prior to the Housing Stability and Tenant Protection Act, New York's rent stabilization system contained two major mechanisms that allowed landlords to remove apartments from rent stabilization protections. These mechanisms were known as luxury deregulation and vacancy deregulation, and together they resulted in the loss of hundreds of thousands of stabilized units over several decades.

Luxury deregulation, also called high-rent high-income deregulation, allowed a landlord to deregulate an apartment if the legal regulated rent reached a certain threshold and the tenant's household income exceeded a set limit. The income threshold was determined through a process that required tenants to disclose their income, and if the combined household income surpassed a certain level for two consecutive years, the apartment could be deregulated upon lease renewal. The income threshold hovered around $200,000 annually, but the rent threshold was the more commonly triggered mechanism.

High-rent vacancy deregulation was arguably even more impactful on the overall supply of stabilized housing. Under this system, if a tenant voluntarily vacated — or was evicted from — a stabilized apartment and the legal regulated rent at the time of that vacancy reached or exceeded a threshold that was set at $2,700 per month at the time the 2019 law passed, the landlord was permitted to permanently remove the unit from the rent stabilization system. This created a powerful financial incentive for landlords to increase rents as rapidly as possible, often by applying for individual apartment improvement increases, major capital improvement increases, and other allowable rent hikes. Once a vacancy occurred and the rent crossed the threshold, the apartment was gone from the stabilized inventory permanently.

The result of these policies over decades was a steady erosion of New York City's affordable housing supply. Tenant advocates and housing researchers consistently pointed to deregulation as a primary driver of displacement and housing insecurity across the five boroughs. When the New York State Legislature finally took action in 2019, the changes it made were sweeping and long-reaching.

The Core Changes the Housing Stability and Tenant Protection Act Made to Deregulation

The most significant and headline-grabbing change made by the Housing Stability and Tenant Protection Act of 2019 was the complete elimination of both high-rent vacancy deregulation and high-rent high-income deregulation. These two pathways out of the rent stabilization system were entirely abolished. As a matter of law, there is no longer a rent threshold or an income threshold that triggers deregulation for a stabilized apartment. Once an apartment is rent-stabilized, it remains rent-stabilized regardless of how high the legal regulated rent climbs or how much money the tenant earns.

This change alone was transformational. It closed off the exit ramps that had drained the stabilized housing stock for years. Apartments that were approaching the old deregulation threshold before 2019 were now permanently locked into the stabilization system. Landlords who had been planning acquisition strategies around the ability to deregulate through rapid rent increases suddenly found their financial models fundamentally altered.

The law also significantly curtailed the mechanisms by which landlords could increase rents in ways that had historically accelerated the march toward deregulation. Individual apartment improvement increases, known as IAIs, were dramatically scaled back. Before 2019, a landlord could pass through the cost of apartment improvements to tenants with a permanent rent increase based on a formula that could generate substantial long-term rent hikes. After the 2019 law, IAI increases were capped at a maximum of $15,000 in improvements over a fifteen-year period, with the allowable rent increase calculated differently and subject to a limit. Similarly, major capital improvement increases were restructured so that any rent increases resulting from building-wide improvements would eventually sunset rather than becoming permanently embedded in the rent.

The preferential rent system was also significantly changed. Before 2019, a landlord who had been charging a tenant below the legal regulated rent — a so-called preferential rent — could snap the rent back up to the full legal regulated rent upon lease renewal. This often meant sudden, large rent increases that could effectively price tenants out of their apartments even without formal deregulation. The 2019 law changed this so that preferential rents are essentially locked in for the life of the tenancy, meaning a tenant receiving a preferential rent can generally keep that lower rent until they leave.

How These Changes Affect Tenants and Landlords Today

For tenants living in rent-stabilized apartments, the changes brought by the Housing Stability and Tenant Protection Act have provided a layer of long-term security that simply did not exist before. A tenant in a stabilized apartment with a legal regulated rent above the old $2,700 threshold no longer needs to worry that a lease non-renewal or a decision to relocate will be followed by the unit's removal from the stabilization rolls. The stability that rent stabilization was always intended to provide is now far more durable.

For landlords, the changes have been significant and, in many cases, financially challenging. The ability to use a tenant's departure as an opportunity to dramatically increase rents and exit the stabilization system is gone. This has affected property valuations, financing structures, and renovation strategies throughout New York City's multifamily real estate market. Some landlords have argued that the restrictions on IAIs and MCIs reduce their incentive to invest in building improvements, though tenant advocates dispute this characterization.

It is also worth noting that the 2019 law strengthened a number of other tenant protections that interact with the deregulation framework. Eviction protections were enhanced, making it more difficult for landlords to remove tenants through non-renewal of leases or harassment. The law also imposed stricter requirements around owner use and demolition applications, which had previously been used as pathways to clear stabilized buildings of tenants in preparation for renovation and potential deregulation.

• High-rent vacancy deregulation was completely eliminated, meaning no apartment can be deregulated simply because it crosses a rent threshold upon vacancy.
• High-rent high-income deregulation was eliminated, so a tenant's income is no longer a basis for removing an apartment from rent stabilization.
• Individual apartment improvement rent increases are now capped at amounts tied to $15,000 in qualifying costs over fifteen years.
• Major capital improvement increases are now temporary rather than permanent additions to the legal regulated rent.
• Preferential rents are generally locked in for the duration of a tenancy rather than being adjustable at lease renewal.
• Enhanced eviction protections make it harder to remove long-term stabilized tenants through non-renewal or harassment.

What Still Allows Deregulation and Where Legal Guidance Matters

While the Housing Stability and Tenant Protection Act dramatically narrowed the circumstances under which an apartment can leave the rent stabilization system, deregulation is not entirely impossible. Understanding the remaining pathways is important for both tenants and landlords, and it is an area where the guidance of an experienced New York tenant and landlord attorney can be invaluable.

One remaining pathway involves apartments that are regulated solely because they receive government subsidies or benefits, such as J-51 or 421-a tax abatements. When those benefit periods expire and are not renewed, an apartment's obligation to remain stabilized may also expire, depending on the specific program and when the building was constructed. This area of the law involves considerable nuance, particularly in light of litigation and legislative developments that have clarified and sometimes expanded the scope of stabilization in tax-benefit buildings.

Another situation involves owner-occupancy and certain small building exemptions. Buildings with fewer than six units that have always been owner-occupied may not be subject to rent stabilization in the first place, and the rules around this exemption require careful analysis. Apartments in buildings that were newly constructed after 1974 and do not receive applicable tax benefits are generally not subject to rent stabilization, though again, this requires a fact-specific review.

There are also ongoing legal challenges and administrative proceedings related to the 2019 law itself. Some landlord groups have challenged the constitutionality of certain provisions, and while those challenges have largely not succeeded in overturning the law's core changes, the litigation landscape continues to evolve. Administrative decisions by the Division of Housing and Community Renewal also shape how the law is applied in practice, and staying current with those developments is a full-time task.

This is precisely where working with knowledgeable legal counsel becomes so important. Whether you are a tenant who believes your apartment was improperly deregulated before or after 2019, a landlord trying to understand your obligations under the current regulatory framework, or a property owner navigating a tax-benefit expiration, the stakes are high and the legal questions are complex. The consequences of getting it wrong — whether that means an unlawful rent increase, an improper deregulation claim, or a missed opportunity to challenge a landlord's actions — can be financially significant and long-lasting.

Summer is a particularly active time in the New York rental market. Leases roll over, tenants make decisions about whether to stay or go, and landlords think about how to position their properties going forward. If questions about rent stabilization, deregulation, or tenant rights are on your mind this summer, this is the right time to get informed and get legal support.

Protecting Your Rights Under the Current Law

The Housing Stability and Tenant Protection Act represented one of the most significant expansions of tenant rights in New York in a generation. But legislation only protects you if you know what it says and have the tools to enforce it. Many tenants are still unaware that their apartments may have been improperly deregulated before or even after 2019, or that they may be entitled to rent overcharges and other remedies if a landlord violated the law. Equally, many landlords are operating under outdated assumptions about what they are permitted to do when a long-term tenant vacates or when a renovation project is completed.

The lookback period for rent overcharge claims was also extended by the 2019 law in ways that give tenants a longer window to challenge improper rent increases. Before the law changed, the lookback period for overcharge claims was generally limited to four years. The 2019 law introduced a more flexible approach to the lookback period in cases involving fraud or a lack of reliable rent history, potentially allowing tenants to challenge rents going further back in time. This change has significant implications for tenants in apartments where the rental history is murky or where there are signs that a landlord manipulated the rent roll to reach or exceed the old deregulation threshold.

If you believe your apartment was improperly deregulated, if you have been charged rents that exceed the legal regulated rent, or if you have questions about your rights as either a tenant or a landlord under New York's current rent regulation framework, speaking with an attorney who focuses on housing law is the most effective step you can take.

The Price Law Firm focuses on New York housing law and is available to help tenants and landlords understand their rights and obligations under the Housing Stability and Tenant Protection Act and the broader framework of New York rent regulation. Whether your questions involve a potential rent overcharge, a deregulation dispute, a preferential rent issue, or any other aspect of stabilization law, the firm is prepared to provide the guidance you need. Do not navigate these complex and high-stakes legal questions on your own — reach out to The Price Law Firm today to discuss your situation and take the first step toward protecting your housing rights.