An Underwater Property in Florida Is Going for $43 Million. The Developer Calls It a 'Unicorn.' The pristine parcel sits along, er, below the coveted Intercoastal Waterway in Boca Raton.

By Jonathan Small

Four acres of beautiful waterfront land in Boca Raton, Florida, is on the market for $43 million.

There's only one issue—it's largely underwater.

Image credit: William Swain via The Real Deal

Giving new meaning to the term "underwater mortgage," real estate manager William Swaim of Waterfront ICW Properties is offering the submerged land for developing single-family homes.

Swaim calls the property a "unicorn" due to its location and relatively inexpensive price tag. The parcel sits along the Intracoastal Waterway, a series of inlets and canals that wealthy residents use to dock their boats and yachts. Home prices in the area have appreciated monthly by more than 10 percent over the past 18 months. A mansion can go for as much as $18 million a pop.

Swaim, who specializes in buying and reselling flooded land, said the area is the "last and largest undeveloped Boca Raton Intracoastal property for sale in 30 years."

But he also warns that anyone buying the property will have their work cut out for them.

"Submerged parcels are a headache," Swaim told The Palm Beach Post. "It takes years to clean them up, and most people don't want to take years to clean them up."

His company will build a seawall and fill the dirt for an additional $3.5 million.

Why is the property underwater?

Swaim's land wasn't always beneath the sea. The property was above ground until 1957, but an apparently greedy neighbor stole the dirt to build a nearby subdivision, Swaim told The Post.

Some local activists are concerned that overdeveloping properties such as these can harm wildlife.

"Manatees are dying at record rates because of impacts to their habitat, and increasing development on submerged lands is only going to compound that problem," said Everglades Law Center Executive Director Lisa Interlandi.

But a 2018 Army Corps review concluded that developing the land would not adversely affect endangered and threatened sea turtles, smalltooth sawfish, or manatees.

Jonathan Small

Entrepreneur Staff

Founder, Strike Fire Productions

Jonathan Small is a bestselling author, journalist, producer, and podcast host. For 25 years, he has worked as a sought-after storyteller for top media companies such as The New York Times, Hearst, Entrepreneur, and Condé Nast. He has held executive roles at Glamour, Fitness, and Entrepreneur and regularly contributes to The New York Times, TV Guide, Cosmo, Details, Maxim, and Good Housekeeping. He is the former “Jake” advice columnist for Glamour magazine and the “Guy Guru” at Cosmo.

Want to be an Entrepreneur Leadership Network contributor? Apply now to join.

Editor's Pick

Business News

JPMorgan Shuts Down Internal Message Board Comments After Employees React to Return-to-Office Mandate

Employees were given the option to leave comments about the RTO mandate with their first and last names on display — and they did not hold back.

Business News

Zillow Predicts These 10 Places Will Have the Hottest Housing Markets in 2025

Zillow predicted that the hottest housing market of 2025 will be Buffalo, New York. Here's why.

Business Ideas

70 Small Business Ideas to Start in 2025

We put together a list of the best, most profitable small business ideas for entrepreneurs to pursue in 2025.

Business News

'Masculine Energy Is Good': Mark Zuckerberg Tells Joe Rogan He Thinks Companies Need More Aggression

On the most recent episode of "The Joe Rogan Experience," Meta CEO Mark Zuckerberg said corporate culture has become "neutered."

Business News

'More Soul-Crushing Than Ever': Popular Hiring Platform Finds Around 20% of Its Postings Were 'Ghost Jobs'

Is that job listing too good to be true? There's a one-in-five chance that it might be.

Growing a Business

5 Risk-Taking Lessons From Founders Who Bet Big and Won

Discover the bold moves and strategic risks that catapulted these entrepreneurs to success. Learn how their fearless decisions can inspire your own path to growth.