What is a flex apartment in NYC and is it legal?
A flex apartment — also called a "flexed" apartment — is a studio or one-bedroom that has been divided using a temporary wall to create an additional bedroom. It is one of the most common arrangements in New York City.
Is a flex apartment legal in NYC?
Temporary walls themselves are legal in NYC, but they must meet specific requirements:
- Walls cannot block required windows (every bedroom must have a window)
- Walls cannot block access to required exits
- Walls cannot run through a room in a way that violates fire safety or egress rules
- Floor-to-ceiling pressurized walls must be installed professionally and meet NYC building code
What to watch out for in flex listings:
- A "flexed" bedroom with no window is not a legal bedroom under NYC housing code — sleeping in a windowless room is a housing violation
- Ask whether the temporary wall has landlord approval — not all landlords permit flex arrangements
- Confirm the layout makes the advertised bedroom a genuine private room with adequate ventilation
Why flex apartments are common:
In NYC's expensive rental market, flexing a one-bedroom into a two-bedroom allows two people to split rent on what would otherwise be a solo apartment, significantly reducing individual costs.
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