Price Reduced39
$5,378,000
4 bd · 4 ba · 3,549 sqft
690 Warren Ln, Key Biscayne, FL
Brigitte Nachtigall · One Sotheby's International Realty
No listing photos
3
Beds
3
Baths
3,221
Sqft
1955
Year built
Range $4,519,134 – $5,869,681 · as of April 23, 2026
ATTOM automated valuation model · 52 published estimates over 6.3 years · shaded band is the model's own published low-to-high range
Highest reading $5,356,861 in March 2026; lowest $1,408,636 in April 2020. The vertical scale starts at the series' own low, not at zero — it is drawn to show movement, not absolute size.
$1,038,882
Estimated monthly payment
$33,311/mo
Loan amount $4,155,526. Estimate only — your actual rate and payment depend on credit, location, and lender.
2025 roll
School ratings (A+ to F) from HJN community data.
St Christophers
PK-6 · Montessori
215 students · 24.4:1 student–teacher
St Agnes Academy
PK-8 · Regular
434 students · 13.4:1 student–teacher
Key Biscayne Presbyterian School
PK-1 · Regular
29 students · 6.6:1 student–teacher
Key Biscayne K-8 Center
PK-5 · Regular · Dade County School District
884 students · 18.0:1 student–teacher
Mast Academy
6-12 · Regular · Dade County School District
1,571 students · 20.4:1 student–teacher
Immaculata-la Salle High School
9-12 · Regular
876 students · 12.1:1 student–teacher
Fisher Island Day School
PK-8 · Regular
126 students · 10.2:1 student–teacher
La Prima Casa Montessori
PK-KG · Montessori
2 students · 1.0:1 student–teacher
MIAMI REALTORS MLSSome properties which appear for sale on this web site may subsequently have sold or may no longer be available.
Price Reduced39$5,378,000
4 bd · 4 ba · 3,549 sqft
690 Warren Ln, Key Biscayne, FL
Brigitte Nachtigall · One Sotheby's International Realty
36$3,950,000
4 bd · 5 ba · 3,250 sqft
445 Grand Bay Dr 104, Key Biscayne, FL
Cristina Diez · Compass Florida, LLC.
39$3,975,000
3 bd · 5 ba · 3,093 sqft
781 Crandon Blvd 401, Key Biscayne, FL
Brigitte Nachtigall · One Sotheby's International Realty
28$3,975,000
3 bd · 5 ba · 3,186 sqft
Address withheld · Key Biscayne, FL
Ana Rodrigues Da Cruz · Coldwell Banker Realty
35$3,900,000
4 bd · 4 ba · 2,930 sqft
430 Grand Bay Dr 606, Key Biscayne, FL
Saddy Delgado PA · One Sotheby's International Realty
86$5,490,000
4 bd · 6 ba · 3,581 sqft
799 Crandon Blvd 202, Key Biscayne, FL
Victor Florencio Sanchez · Ocean Club Realty, Inc.
Within 2 miles of this home: 15 restaurants and cafés, 1 grocery store, 11 parks and green spaces, and 15+ transit stops.
Place data from OpenStreetMap.
Craft Key Biscayne
American restaurant · Crandon Boulevard
Origin Asian Bistro and Sushi
Starbucks
Crandon Boulevard
Novecento
Argentinian restaurant · Crandon Boulevard
Narbona
Crandon Boulevard
Subway
Crandon Boulevard
Domino's
Crandon Boulevard
Pita Pockets KB
Lebanese restaurant · Crandon Boulevard
Winn-Dixie
Crandon Boulevard
Village Green
Key Biscayne Village Green Playgound
Crandon Park Beach
Paradise Park
Crandon Boulevard
Hampton Park
Lake Daniela
Harbor Park
Harbor Drive
Crandon Beach
Crandon Boulevard & Sonesta Drive
Crandon Boulevard & Heather Drive
Crandon Boulevard & Harbor Drive
Crandon Boulevard & Grand Bay Drive
Crandon Boulevard & Ocean Lane Drive
Crandon Boulevard & McIntire Street
Harbor Drive & Fernwood Road
Crandon Boulevard & East Enid Drive
Rings at ½ mile and 1 mile. Basemap © OpenMapTiles © OpenStreetMap contributors.
Open the Key Biscayne camera map4 license-plate readers mapped within ½ mile of this home, all identified as Flock Safety devices. Nearest: 0.3 mi north.
| Device type | Within ½ mi | Within 1 mi |
|---|---|---|
| License-plate readers | 4 | 5 |
| of which Flock Safety | 4 | 5 |
Community-reported via OpenStreetMap; may be incomplete. Data as of . © OpenStreetMap contributors (ODbL)
License-plate readers (ALPR) are fixed cameras that photograph passing vehicles and read their plates. Records are typically shared with the agency or association that operates the camera.
Flock Safety is a company whose plate-reader cameras are used by police departments, cities, HOAs and businesses. Its devices are usually solar-powered and pole-mounted.
