690 Warren Ln
Key Biscayne, FL 33149
$5,478,000
$1,544/ft²
About this home
A truly exceptional Miami Modern Tropical residence set on a prime 8,010 SF corner lot, offering 3,549 SF of beautifully curated living space with 4 bedrooms and 3.5 bathrooms. Designed by architect Hervin Romney, a founding member of Arquitectonica, the home reflects a distinctive architectural vision inspired by the organic principles of Frank Lloyd Wright and the expressive forms of Antoni Gaudí, where art, design, and nature seamlessly converge. This residence captivates with its abundance of natural light, soaring high ceilings, fluid open spaces, and harmonious lines that create a sense of warmth, sophistication, and effortless flow throughout the main living areas. The beautifully remodeled kitchen and bar are a true centerpiece, featuring high-end appliances, premium finishes, refined craftsmanship, and a design that balances functionality with striking aesthetics. Step outside into your own private tropical retreat, where lush landscaping, graceful curved terraces, and a stunning swimming pool create an atmosphere of tranquility and escape. This outdoor sanctuary is perfect for both relaxation and entertaining. As an added privilege, the property includes membership to the Key Biscayne Beach Club, offering exclusive access to one of Miami’s most coveted coastal lifestyles. Key Biscayne is renowned for its pristine beaches, charming restaurants, and vibrant yet relaxed atmosphere—delivering a true island lifestyle just minutes from the city.
Property details
Listing
- MLS #
- A12010108
- Status
- For sale
- Listed on
- Apr 30, 2026
- Days on market
- 101 days
- Listing data updated
- May 1, 2026
Interior
- Beds
- 4
- Baths
- 3.5
- Living area
- 3,549 ft²
- Price per ft²
- $1,544/ft²
Building & community
- Type
- Single-family home
- Year built
- 2000
- County
- Miami-Dade
Lot & exterior
- Lot size
- 8,010 ft²
Days on market, price per ft² and the monthly HOA amount are calculated by this site from the MLS data shown; the association fee is normalized to a monthly figure.
True monthly cost
- Mortgage (principal & interest)
- $27,700
- Property taxes (est.)
- $5,022
- Home insurance (est.)
- $600
- Flood insurance (est.)
- —
Estimated total$33,322*/mo
* Some cost lines aren't available yet for this listing; the total shown is incomplete.
Based on 20% down, a 6.5% rate and a 30-year loan, plus this home's estimated Florida carrying costs. All figures are illustrative estimates — not quotes, not financial or insurance advice.
Sources: flood zone — FEMA National Flood Hazard Layer; mortgage, taxes and insurance figures — this site's own estimates; HOA / CDD — as reported for this listing.
What will this home really cost you?
Location
Mortgage calculator
$27,700/moEstimated principal & interest. Taxes, insurance, and HOA are not included. This is an estimate, not a quote or financial advice.
This listing is courtesy of One Sotheby's International Realty.
Brigitte Nachtigall · 305-710-9664 · Brigitte@bnachtigall.com · 305-365-2811
Data deemed reliable, but is not guaranteed accurate by MIAMI REALTORS®.
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