Can a rent-stabilized apartment be deregulated?

Mostly no. New York's Housing Stability and Tenant Protection Act (HSTPA) repealed high-rent vacancy deregulation and high-income deregulation on June 14, 2019, so a stabilized apartment can no longer leave the system just because its rent or its tenant's income got high enough. A few routes out remain, the biggest being the end of certain tax benefits that were the only reason a building was stabilized, plus 421-a (16) market-rate units and substantial rehabilitation of a whole building.

Because many apartments were deregulated before 2019, sometimes improperly, it is worth knowing how to read your rent history for warning signs.

How deregulation used to work

From 1997 until 2019, a stabilized apartment could leave regulation two ways. When a unit became vacant and its legal rent had lawfully reached the deregulation rent threshold, the owner could rent it at market rate. And an occupied unit could be deregulated by HCR order if both the rent and the household income passed set thresholds. Owners often pushed legal rents over the line with vacancy increases and Individual Apartment Improvement (IAI) increases.

The high-income route used an income threshold of $175,000 (July 1, 1998 to June 30, 2011) and then $200,000 (July 1, 2011 to June 13, 2019), together with the rent threshold.

1. 1997

   Rent threshold of $2,000 takes effect

   Vacant units at or above it could be rented at market rate.

2. 2011

   Threshold rises to $2,500; income threshold to $200,000

3. 2015

   Threshold rises to $2,700

   In NYC it was then adjusted to $2,733.75 (2018) and $2,774.76 (2019).

4. June 14, 2019

   HSTPA repeals all deregulation except 421-a (16)

   Overcharge review extended from four to six years.

5. Oct 17, 2024

   New IAI rules

   IAI caps rise to $30,000 / $50,000. Deregulation stays repealed, so higher legal rents no longer end stabilization.

Ways an apartment can still leave rent stabilization

1. Tax-benefit units when the benefit ends

Some buildings are stabilized only because the owner took a tax benefit: 421-a (1-15) for new construction, or J-51 for rehabilitation work finished before June 30, 2022, in buildings that would not otherwise be covered (for example, built or gut-renovated after 1974, or with fewer than six units). In those buildings the apartment can leave stabilization when the benefit expires, but only if every lease and renewal during the benefit period carried a notice in at least 12-point type saying the unit would be deregulated when the last lease signed during the benefit ends, with the approximate expiry date.

If the owner left that notice out, the apartment stays stabilized for the tenant in occupancy until that tenant moves out. HCR's example: a four-unit J-51 building's benefit ended December 31, 2024, but the tenant's leases had no notice, so she was still entitled to a stabilized renewal in March 2025.

In buildings that were stabilized anyway (most pre-1974 buildings with six or more units), the end of a J-51 benefit changes nothing. And many 421-a affordable units must stay stabilized for 35 or 40 years, or for as long as the tenant lives there. See 421-a apartments and rent stabilization and the 421-a / J-51 expiry calculator.

2. 421-a (16) market-rate units

This is the only kind of rent-based exit that survived 2019. In 421-a (16) buildings, a market-rate apartment first rented at or above the Market Rate Threshold is permanently exempt, and a stabilized market-rate unit that is vacated can become exempt if the threshold was lawfully reached. The threshold is $3,217.40 for 2026. Income-restricted (affordable) units in these buildings are not covered by this exemption.

3. Substantial rehabilitation

An owner can exempt a whole building if at least 75% of building-wide and apartment systems were replaced, the building was in a substandard or seriously deteriorated condition when work began, and every system meets code. HCR won't find a building substandard where the owner tried to get a vacancy through arson that led to a criminal conviction, or where HCR or another government agency made a harassment finding. For work started on or after January 1, 2024, the owner must apply within one year of completion and get an HCR determination. Occupied stabilized apartments that were not rehabilitated stay regulated until vacated.

4. Other exits that end the tenancy, not the protection

A stabilized tenant can be evicted only on grounds the law allows, and only through a court case. Those cases end one tenancy; they are not a way to deregulate the apartment through higher rent or income. They are fact-heavy and have their own rules, so if you get a notice, talk to a lawyer. NYC tenants facing eviction may qualify for a free lawyer under Right to Counsel.

How to spot an improper deregulation in your rent history

Your apartment's registered rent history lists every rent the owner reported to HCR each April 1, and any change in status. Request it online at rent.hcr.ny.gov or at a Borough Rent Office (see how to request your rent history). Then look for these red flags:

1. 1

   A jump to the threshold right before deregulation

   A rent that rose from, say, $1,500 to just over $2,500 in one vacancy often means the owner claimed large IAIs. Ask whether the work was real, documented and paid for.
2. 2

   “Exempt” or “permanently exempt” status after June 14, 2019

   Outside 421-a (16) and the other exits above, a deregulation registered after that date is a warning sign.
3. 3

   Gaps in registration

   Missing years, or a unit that was registered as stabilized and then simply stopped appearing, deserve questions.
4. 4

   A tax-benefit building with no notice in your lease

   If your building was stabilized only because of 421-a or J-51 and none of your leases had the required deregulation notice, the unit should still be stabilized for you.
5. 5

   Your rent today vs the last registered legal rent

   Compare your current rent to the last legal regulated rent plus allowed guideline increases. The rent overcharge estimator walks through the math.

If something looks wrong, you can file an overcharge complaint with HCR or raise it in court. For complaints filed since June 14, 2019, HCR generally reviews six years of rent history, and a willful overcharge can bring treble damages for that period. How far back you can challenge an old deregulation depends on dates and facts, and courts have limited reaching beyond the review period except in specific circumstances, so get advice from a tenant lawyer or a legal services group before you file. Our guide to filing a rent overcharge complaint covers the forms.

Quick check: is my apartment likely still stabilized?

• Building built before 1974 with six or more units, and your unit was not deregulated before June 14, 2019: likely stabilized.
• Building receives or received 421-a or J-51: check the lease notices and the benefit dates.
• Not sure: run the rent-stabilized checker and read is my apartment rent stabilized?