One of St. Augustine’s most iconic waterfront estates — perched just steps from the historic Castillo de San Marcos — has sold for $4 million, marking one of the city’s most significant real estate transactions so far this year.
Known as Miramar, the 1905 residence at 21 Water Street closed on May 20, according to public records.
Originally listed at $4.8 million, the estate attracted attention for its unparalleled location, storied history, and architectural pedigree.
“This is one of the most spectacular properties in all of St. Augustine, and perhaps in all of Florida,” said Danielle Fraser of Berkshire Hathaway HomeServices FNR, who represented the seller. “You simply can’t replicate a site like this.”

Designed by prominent Florida architect Fred Henderich, the 5-bedroom, 3.5-bath home spans 5,566 square feet and sits on 1.73 acres of prime waterfront property with sweeping views of the Atlantic Ocean, the Intracoastal Waterway, and the Old City’s historic district.
The Frame Vernacular-style home retains much of its original character, including diamond-paned sash windows, beadboard detailing, and broad, welcoming verandas. Its commanding presence and preserved details make it one of the last grand residences of its era still intact in downtown St. Augustine.
The property had been in the same family for more than 50 years. Constance Foiou Gaitanis, 88, whose parents helped establish the St. Photios Greek Orthodox National Shrine in 1982, has long been a respected civic figure and benefactor in the area. She is downsizing after decades of stewardship over the estate.
“It’s a tabula rasa,” Fraser noted prior to the sale. “A blank slate where you can combine the history of the original woodwork — which is still in place — with modern design tailored to today’s tastes.”
In addition to its historic charm, the estate includes a private boat ramp, a waterfront pool, and potential for a dock — amenities rarely found in such close proximity to downtown.
Still, it’s the home’s location directly across from the Castillo de San Marcos, Florida’s oldest masonry fort and one of its most beloved landmarks, that makes it truly singular.
As the listing put it: “This is more than a home. It’s a legacy.”