669 S Mashta Dr, Key Biscayne FL 33149 | Miami-Dade County | A12033340

This exceptional Key Biscayne residence at 669 S Mashta Dr is listed at $5,799,000. While the MLS does not specify furnished status, fixtures and built-in appliances typically convey with the home — we’ll confirm specifics for you. The property includes a private above-ground pool, distinct from any shared HOA amenities (which we’re happy to detail upon request). For precise inclusions and to explore this 4-bedroom, 3.5-bath home’s full potential, contact Christopher Lazaro, Key Biscayne Real Estate Expert, directly.

669 S Mashta Dr is located in the coastal corridor of Key Biscayne, Florida, with the zip code 33149. This prime position offers proximity to the island’s pristine beaches, Crandon Park, and the Bill Baggs Cape Florida State Park, while maintaining a tranquil residential setting. For precise insights on how this location aligns with your lifestyle, reach out to Christopher Lazaro, Key Biscayne Real Estate Expert, for a detailed discussion.

To explore the unique advantages of this property’s setting—or to schedule a private tour—contact Christopher directly for verified, hyperlocal expertise.

This home at 669 S Mashta Dr has no mandatory HOA—it's a single-family property with no association on record. The owner handles all utilities, landscaping, and upkeep directly, though the home remains subject to Key Biscayne's city ordinances. For complete clarity on local regulations or maintenance expectations, contact Christopher Lazaro, Key Biscayne Real Estate Expert, to discuss this $5,799,000 listing.

The current tax of record for 669 S Mashta Dr is $22,013 (2025), but Florida reassesses upon sale. As an ESTIMATE ONLY — using a Miami-Dade rate near 2.0% — taxes at this $5,799,000 price would be approximately $115,980/yr (≈ $9,665/mo) without homestead, or $114,980/yr (≈ $9,582/mo) with Florida's homestead exemption, which reduces taxable value for primary residences only. These projections are not quotes; always confirm with the Miami-Dade Property Appraiser and a tax specialist.

For precise figures tailored to your situation, contact Christopher Lazaro, Key Biscayne Real Estate Expert, who’ll ensure you navigate taxes and exemptions with confidence.

This home at 669 S Mashta Dr is in a FEMA-designated flood zone, which means lenders may require flood insurance. Flood zones indicate risk levels—some areas face frequent flooding, while others are moderate or minimal risk. For precise definitions, review FEMA's flood zone classifications, and view the FEMA flood map for this address. To confirm specifics and discuss coverage options, connect with Christopher Lazaro, Key Biscayne Real Estate Expert, for tailored guidance.

As a single-family home at 669 S Mashta Dr, this property has no condo or HOA restrictions—pet policies are set solely by the owner, within local ordinances or lease terms. Documented service animals and emotional support animals (ESAs) are protected under federal law. For precise details on current allowances, contact Christopher Lazaro, Key Biscayne Real Estate Expert, to confirm.

The $5,799,000 listing reflects a precise valuation from a comparative market analysis (CMA) of Key Biscayne’s luxury single-family homes, accounting for this property’s 3,382 sqft, 4bd/3.5ba layout and Mashta Drive’s waterfront prestige. Miami-Dade’s current market shows single-family homes closing at 95% of original list price, averaging 41 days to contract (MIAMI REALTORS®, May 2026)—but Key Biscayne’s ultra-competitive waterfront segment often outperforms. Before drafting an offer, let’s review a hyperlocal CMA for 669 S Mashta Dr’s exact positioning. For verified insights, connect directly with Christopher Lazaro, Key Biscayne Real Estate Expert.

Before touring 669 S Mashta Dr, I strongly recommend securing a pre-approval from a Florida Licensed Mortgage Loan Originator. This clarifies your budget and strengthens your position in Key Biscayne’s competitive market, especially for a home listed at $5,799,000. Reach out to me, Christopher Lazaro, Key Biscayne Real Estate Expert, to verify financing options or schedule a showing—I’ll ensure you’re fully prepared.