NYC Local Laws · Defined
Local Law 126 of 2024: Basement and cellar conversion pilot
Establishes a NYC pilot framework for converting certain existing basement or cellar apartments into habitable dwelling units.
New York City jurisdiction · Sources checked September 15, 2026. Law numbers repeat by year. These educational summaries are not legal advice or a complete compliance checklist. Later amendments, agency rules, building characteristics, and effective dates determine the requirements for a particular property. Use the linked City sources to confirm current obligations.
Why it matters
This is not Local Law 126 of 2021 and is not a citywide declaration that all basement apartments are legal. Eligibility, location, physical conditions, required upgrades, and agency approvals determine whether a particular property can use the pilot.
In practice
A project example
An acquisition team excludes an unapproved cellar apartment from its assumed legal unit count while investigating whether the property qualifies for a conversion pathway.
Technical references
General educational guidance from KOW Building Consultants. Examples are illustrative, not project records. The applicable contract, standard, program, and jurisdiction control the requirements for a specific assignment.