The year associated with the peak of the Florida land boom of the 1920s was 1925.
During the boom, investors, developers and migrants rushed into South Florida, especially Miami, Palm Beach and nearby communities. Rising tourism, improved transportation, aggressive promotion and expectations of rapid profits pushed land prices sharply upward. Speculators often bought property not to build on it, but to resell it at a higher price.
The frenzy reached its high point in the latter part of 1925. New subdivisions were advertised nationwide, construction accelerated, and transactions sometimes involved little more than a contract or “binder” that could be flipped to another buyer. The boom helped shape the modern urban landscape of South Florida, including communities that expanded rapidly around Miami.
The collapse followed in 1926 rather than 1929. A shortage of building materials and transportation capacity, weakening demand, tighter credit and damaging hurricanes helped end the speculation. The later Wall Street Crash is therefore not the event that marks the Florida boom's peak; 1925 is the standard answer.