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For sale

690 Warren Ln

Key Biscayne, FL 33149

$5,478,000

$1,544/ft²

4Beds
3.5Baths
3,549Sq ft
2000Year built
Single-family homeType

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.

Equal Housing Opportunity

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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