New York’s mayor Zohran Mamdani taunted opponents with a photo of an ice‑cream cake reading “Happy rent freeze!” His win made him the affordability candidate in a city where almost seven out of ten households rent. He pledged a two‑year pause on rent increases for tenants in rent‑stabilised units, arguing it would bring stability to residents.

A 2024 review of 1967‑2023 studies shows rent controls cap rents, but critics warn they raise prices on unregulated units and shrink supply. In the US, post‑pandemic rent inflation and a record median first‑time homebuyer age of 40 have made controls a political lure.

Supporters say rent‑stabilised units help the city’s poorest, who spend 40% of income on rent, and curb speculative development. Opponents cite reduced maintenance incentives, empty units and distorted housing allocation. Only about 9% of rent‑stabilised buildings are in distress, challenging the narrative that controls kill investment.

Germany’s Berlin, where 700,000 households spend more than 45% of income on rent, limits rises with the Mietpreisbremse and Kappungsgrenze, yet rents have climbed nearly 6.3% in the last year. A proposed five‑year freeze was struck down by the constitutional court in 2021, highlighting legal tensions.