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New York landlords are striking back at new rent laws, filing a lawsuit on Monday night intended to dismantle the entire rent-regulation system, which dictates the rents of about 2.4 million tenants who live in nearly 1 million apartments.

They are betting that the tighter laws passed in June will bolster their claims that the rent-stabilization system — which subjects units to government-mandated caps on rent increases — is unconstitutional and amounts to an unlawful taking of property.

The New York real estate industry, long one of the most dominant in Albany, suffered a crushing defeat last month when newly emboldened Democratic lawmakers passed landmark legislation to strengthen tenant protections.

The sweeping changes to the rent laws — which the industry said would cripple landlords — stunned real estate lobbyists, who had mounted an expensive but unsuccessful campaign to fend off the legislation.