631 N Mashta Drive

<table width="100%" cellpadding="0" cellspacing="2" bordercolor=""><tr><td colspan="4" align="center" class="celltext"><table width="100%" style="height:100%;" border="0" align="right" cellpadding="3" cellspacing="0"><tr><td width="50%" valign="top" align="center" class="textHF"></td></tr></table></td></tr><tr><td colspan="4" class="celltextBOLDcolor" align="left" valign="middle" height="25"><table width="100%" border="0" cellpadding="0" cellspacing="0"><tr><td width="85%"><h1 style="margin:0px;padding:0px 0px 0px 2px;" class="text Replace">631 N Mashta Drive, Key Biscayne, FL 33149</h1></td><td width="15%" align="right" class="text"></td></tr></table></td></tr><form name="form1" onSubmit="return(false);" id="form1"><tr><td valign="top" class="celltext" colspan="2"><div style="display:block;float:left;clear:both;position: relative;width: 99%;height: 100%; background-color: transparent;"><div class="advanced-slider" id="el-slider" ><ul class="slides" style="padding: 0px;" ><li 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class="slide"><img src="https://cdn.photos.sparkplatform.com/flr/20260729170812443140000000-o_49.jpg" alt="" class="image" /><img class="thumbnail" src="https://cdn.photos.sparkplatform.com/flr/20260729170812443140000000-o_49.jpg" alt="" /></li></ul></div></div></td></tr><tr><td colspan="4" valign="top" class="celltextBOLDcolor" height="25"></td></tr></form><tr valign="top"><td colspan="4" class="celltext notranslate"><table width="100%" border="0" cellspacing="0" cellpadding="2"><tr><td class="textBOLD Replace" width="33%"><strong>Price:</strong> <span class="pType">$18,500,000</span></td><td class="textBOLD Replace" width="33%">MLS Number: B26058354</td><td class="textBOLD Replace pType" width="33%">Single Family</td></tr></table></td></tr><tr valign="top"><td colspan="4" width="100%" class="celltext" valign="middle"><strong> Address:</strong> 631 N Mashta Drive, Key Biscayne, Florida 33149 USA</td></tr><tr valign="top"><td colspan="4" class="notranslate"><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr><td valign="middle" width="33%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Beds: </strong>4</td></tr></table></td><td width="2"> </td><td valign="middle" width="33%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Baths: </strong>4</td></tr></table></td><td width="2"> </td><td valign="middle" width="33%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Half Baths: </strong>1</td></tr></table></td></tr><tr><td valign="middle" width="33%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Living Area: </strong>2,255</td></tr></table></td><td width="2"> </td><td valign="middle" width="33%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Waterfront: </strong>YES</td></tr></table></td><td width="2"> </td><td valign="middle" width="33%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Year Built: </strong>1958</td></tr></table></td></tr></table><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr><td valign="middle" width="50%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Community: </strong>MASHTA ISLAND</td></tr></table></td><td width="2"> </td><td valign="middle" width="50%"><table width="100%" border="0" cellspacing="0" cellpadding="0"><tr><td width="100%" class="celltext" valign="middle"><strong> Subdivision: </strong>MASHTA ISLAND</td></tr></table></td></tr></table></td></tr><tr valign="top"><td colspan="4" valign="top" class="celltextBOLDcolor" height="25"></td></tr><tr valign="top"><td colspan="4" class="celltext notranslate"><div id="Table4" style="display:table; float:left; clear:both; width:100%;"><div style="display:table-cell; float:left; width:33%; height:35px;"><a href="https://www.bozenakaluza.com/megatemplate/requestinfo.asp?mls=B26058354&lp=18500000&id=3236277&language=&address=631 N Mashta Drive" style="cursor:pointer;" rel="nofollow"><img src="images/requestInfoIcon.png" alt="Request Information" class="pngfix" style="float: left; display: inline; border:0;"><span class="iconTxt"><strong>Request Information</strong></span></a></div><div style="display:table-cell; float:left; width:33%; height:35px;"><a href="https://www.bozenakaluza.com/megatemplate/custpropgrid.asp?id=3236277&mls=B26058354&language=" style="cursor:pointer;" rel="nofollow"><img src="images/saveIcon.png" alt="Save this Property" style="float: left; display: inline; border:0;" class="pngfix"><span class="iconTxt">Save this 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width="30" height="30" style="float: left; display: inline; border:0;"><span class="iconTxt">Schedule a Showing</span></a></div><div style="display:table-cell; float:left; width:33%; height:35px;"><a onClick="self.status='';return true;" href="school.asp?id=3236277&state=FL &city=Key Biscayne&zipCode=33149" style="cursor:pointer;" rel="nofollow"><img src="images/schoolInfoIcon.png" alt="School Information" class="pngfix" alt="" width="30" height="30" style="float: left; display: inline; border:0;"><span class="iconTxt">School Information</span></a></div></div></td></tr><tr valign="top"><td colspan="4" valign="middle" class="celltitlecolor" height="25"> Remarks:</td></tr><tr valign="top"><td colspan="4" class="celltext"><div class="text" id="rtext" style="text-align:justify; padding:6px;">BRING ALL OFFERS! Exceptional waterfront opportunity in prestigious Key Biscayne. Set on a 15,000 sq. ft. lot with 100 feet of water frontage, this residence offers open-water views, direct Biscayne Bay access, and no fixed bridges to the ocean. Currently undergoing a complete renovation, it will feature modern finishes, impact windows and doors, new systems, spacious living areas, a chef's kitchen, and luxurious bathrooms. Enjoy a private dock, deep-water access, pool, breathtaking sunsets, and an unmatched boating lifestyle in one of South Florida's most desirable communities One of the most compelling waterfront opportunities currently available in all of Key Biscayne. Perfectly positioned on the exclusive and highly coveted Mashta Island, this exceptional property offers approximately 100 feet of prime waterfront, deep-water dockage, direct Biscayne Bay access, and no fixed bridges to the Atlantic Ocean, creating an unparalleled opportunity for boating enthusiasts and yacht owners. Mashta Island has long been recognized as one of South Florida's most prestigious residential enclaves, offering exceptional privacy, quiet tree-lined streets, oversized waterfront estates, and immediate access to the open waters of Biscayne Bay while remaining only minutes from Brickell, Downtown Miami, Coconut Grove, Coral Gables, Miami Beach, and Miami International Airport. Very few neighborhoods offer this combination of island living, security, boating lifestyle, and proximity to the city's financial and cultural centers. The residence is currently on renovation designed to transform the property into a contemporary waterfront estate while preserving the exceptional value of its location and oversized waterfront parcel. This is substantially more than a cosmetic renovation. The project includes major improvements throughout the residence, including redesigned living spaces, upgraded electrical and plumbing systems, new HVAC equipment, impact-resistant windows and doors, premium flooring, modern architectural lighting, designer finishes, and a completely reimagined interior intended to meet today's luxury lifestyle expectations. Upon completion, the home is anticipated to offer spacious entertaining areas, beautifully appointed bedroom suites, bathrooms, an impressive chef's kitchen featuring custom cabinetry, premium appliances, elegant countertops, and thoughtfully designed indoor-outdoor living spaces that maximize the spectacular waterfront setting. The property's exceptional orientation provides beautiful water views and unforgettable sunsets while creating an ideal environment for entertaining, family gatherings, and year-round outdoor living. The expansive backyard offers generous space surrounding the swimming pool together with multiple areas for outdoor dining, lounging, and enjoying the waterfront lifestyle that has made Key Biscayne one of the most desirable residential communities in South Florida. For boating enthusiasts, few properties can offer the combination of oversized waterfront, private dockage, deep-water access, and unrestricted navigation to Biscayne Bay and the Atlantic Ocean without fixed bridges. Whether accommodating a large sport yacht, cruising yacht, center console, or multiple vessels, the waterfront configuration provides flexibility rarely available in today's market. Key Biscayne continues to be recognized as one of South Florida's most exclusive island communities, celebrated for its pristine beaches, excellent schools, private clubs, marinas, tennis facilities, parks, bicycle paths, restaurants, and relaxed coastal lifestyle. Residents enjoy the unique advantage of living within a peaceful island environment while remaining only a short drive from Miami's world-class shopping, fine dining, cultural institutions, private airports, international business centers, and professional sports venues. The supply of premium waterfront homes on Mashta Island remains extremely limited due to the neighborhood's established character and finite number of waterfront parcels. As a result, opportunities to acquire large waterfront lots with substantial dockage and direct ocean access continue to be highly sought after by both domestic and international buyers. The combination of location, waterfront dimensions, boating accessibility, oversized lot, and comprehensive renovation creates a property with exceptional long-term appeal. Showings are strictly by appointment with the Listing Agent.. All measurements, dimensions, lot size, square footage, waterfront frontage, dock dimensions, room sizes, zoning, taxes, permits, specifications, plans, renderings, and property information are believed to be accurate but are not guaranteed and should be independently verified by Buyer. Renderings, conceptual plans, floor plans, specifications, and construction updates are available upon request when applicable. This offering represents an extraordinary opportunity to secure one of Key Biscayne's waterfront residences . Whether as a primary residence, seasonal retreat, or long-term investment, this property combines one of South Florida's most desirable locations with an outstanding boating lifestyle and exceptional future value. Bring All Offers.</div></td></tr><tr valign="top"><td colspan="4" class="celltext"><div class="text" id="Div1" style="text-align:justify; padding:6px;"></td></tr><tr><td colspan="4" valign="top" class=""></td></tr><tr><td colspan="4" valign="top" class="celltitlecolor">Mapped Location:</td></tr><tr><td colspan="4" class="celltext" align="right" height="400" valign="middle" style="position: relative;"><div id="mapsearch" style="display: inline; float: left; clear: left; color: black; width: 99%; height: 350px;">Loading...</div></td></tr><tr valign="top"><td class="celltext" colspan="4" valign="middle"><div class="text" style="text-align:justify; padding:6px;">The data relating to real estate for sale/lease on this web site come in part from a cooperative data exchange program of the multiple listing service (MLS) in which this real estate firm (Broker) participates. The properties displayed may not be all of the properties in the MLS's database, or all of the properties listed with Brokers participating in the cooperative data exchange program. Properties listed by Brokers other than this Broker are marked with either the listing Broker's logo or name or the MLS name or a logo provided by the MLS. Detailed information about such properties includes the name of the listing Brokers. Information provided is thought to be reliable but is not guaranteed to be accurate; you are advised to verify facts that are important to you. No warranties, expressed or implied, are provided for the data herein, or for their use or interpretation by the user.</p><p>The Florida Association of Realtors and its cooperating MLS's do not create, control or review the property data displayed herein and take no responsibility for the content of such records. Federal law prohibits discrimination on the basis of race, color, religion, sex, handicap, familial status or national origin in the sale, rental or financing of housing. This property is courtesy of Coldwell Banker.</p></div></td></tr><tr><td colspan="6" class="celltext"> </td></tr><tr><td colspan="4" valign="top" class="celltext" align="center" style="margin:10px auto;text-align:center;"><a href="http://www.resionline.com" target="_blank"><img src="images/resilogo.png" alt="Real Estate Web Design" width="96" height="39" border="0"></a></td></tr></table><link rel="stylesheet" href="https://unpkg.com/leaflet@1.6.0/dist/leaflet.css" integrity="sha512-xwE/Az9zrjBIphAcBb3F6JVqxf46+CDLwfLMHloNu6KEQCAWi6HcDUbeOfBIptF7tcCzusKFjFw2yuvEpDL9wQ==" crossorigin=""/><link rel="stylesheet" href="css/map.css" type="text/css" />
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Updated: Thursday, September 17, 2026

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