Grand Bay Tower
Grand Bay Residences (also known as Grand Bay Tower) is an oceanfront luxury condominium at 445 Grand Bay Drive in Key Biscayne, Florida, completed in 1996. It was developed by GB/JT Hotel Partners with architecture by Cohen, Freedman, Encinosa & Associates, and sits on roughly 12 acres of tropical grounds with direct access to the Atlantic beach.
The 13-story building contains 138 residences ranging from two-bedroom units up to five-bedroom penthouses, with interior sizes spanning roughly 4,810 to 8,435 square feet. Residences feature high ceilings, generous terraces, and private entry foyers, and the property offers resort-style amenities including a large spa.
Amenities
- Heated swimming pool & Jacuzzi
- Tennis courts
- 20,000 sq ft spa
- Fitness center
- Social/club room
- Key-operated elevators
- Concierge
- Valet parking
- Direct beach access
- 24-hour security
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Key Biscayne, FL 33149
Available Residences at Grand Bay Tower
4 Bedroom Condos · 1 unit
| Unit | Asking Price | Bed(s)/Bath(s) | Living Size | Price/Sq.Ft. | Days on Market |
|---|---|---|---|---|---|
| PH-1AN | $26,000,000 | 4 / 6 / 2 | 9,600 | $2,708 | 240 |
3 Bedroom Condos · 3 units
| Unit | Asking Price | Bed(s)/Bath(s) | Living Size | Price/Sq.Ft. | Days on Market |
|---|---|---|---|---|---|
| 1103 | $6,850,000 | 3 / 4 / 1 | 3,630 | $1,887 | 14 |
| 708 | $3,690,000 | 3 / 3 | 2,840 | $1,299 | 2 |
| 307 | $3,400,000 | 3 / 4 | 2,840 | $1,197 | 132 |
2 Bedroom Condos · 1 unit
| Unit | Asking Price | Bed(s)/Bath(s) | Living Size | Price/Sq.Ft. | Days on Market |
|---|---|---|---|---|---|
| 801 | $6,900,000 | 2 / 4 / 1 | 3,950 | $1,747 | 77 |
Compare every Key Biscayne building, its inventory, and area market trends in one place.
ANALYTICS
CURRENT INVENTORY
INVENTORY BY BEDROOM
- 2 Bed (1) 20%
- 3 Bed (3) 60%
- 4 Bed (1) 20%
INVENTORY TREND (ALL UNITS)
Market & Community Report
As of August 12, 2026, Grand Bay Tower carries 5 active listings at an average asking price of $9.4M, with an average time on market of 93 days. Closed sales over the preceding 36 months averaged $1,290 per sq ft, and 1 transaction closed in the past 12 months — implying 60 months of supply against the current pace of absorption.
Zip code 33149 (Key Biscayne) is home to 14,628 residents with a median age of 43.2. Per-capita income stands at $106,219; 77.1% hold a bachelor's degree or higher. 69.4% of units are owner-occupied; 34.6% of residents work from home.
Explore the full Key Biscayne market intelligence report — pricing trends, inventory & sales pace →
Data current as of August 12, 2026. Market metrics derived from MLS closed sales; community data from U.S. Census ACS.
Frequently Asked Questions — Grand Bay Tower
How many condos are for sale at Grand Bay Tower?
As of August 12, 2026, 5 residences are actively listed for sale at Grand Bay Tower. Current asking prices range from $3.4M to $26M. Inventory updates daily from the MLS.
How much do condos at Grand Bay Tower cost?
Condos at Grand Bay Tower are currently asking from $3.4M to $26M. Over the past 36 months, closed sales have averaged $1,290 per square foot. Final pricing varies by floor, line, square footage, finishes, and view.
What is the average price per square foot at Grand Bay Tower?
Based on MLS closed sales over the preceding 36 months, the average sale price at Grand Bay Tower is $1,290 per square foot. Use this as a benchmark when comparing active listings in the building.
Where is Grand Bay Tower located?
Grand Bay Tower is located at 430 Grand Bay Dr, Key Biscayne, FL, 33149, in the Key Biscayne area.
What neighborhood is Grand Bay Tower in?
Grand Bay Tower is in Key Biscayne, Key Biscayne. You can compare every condo building, home inventory, and price trend across Key Biscayne on its neighborhood guide.
How many units are in Grand Bay Tower?
Grand Bay Tower has 100 residences across 14 stories.
What year was Grand Bay Tower built?
Grand Bay Tower was completed in 1996.
What amenities does Grand Bay Tower offer?
Grand Bay Tower amenities include Heated swimming pool & Jacuzzi, Tennis courts, 20,000 sq ft spa, Fitness center, Social/club room, Key-operated elevators, Concierge, Valet parking.