$19,450,000550 Harbor Drive, Key Biscayne, FL 33149
Listing courtesy of Three Bridges Realty, LLC · 305-345-2023 · BeachesMLS
Full disclosure: what this home really costs
8 of 12 answered from real sources. Anything not in the listing says so, and one tap asks Zach. Nothing here is guessed. Source: BeachesMLS listing, updated Oct 30, 2026, unless a row says otherwise.
- Price
- $19,450,000 · $2,994/sqft
- Property taxes
- $117,717/yr (2025 bill). A new owner's bill is reset from the sale price and is usually higher; Zach can pull the county estimate.
- HOA / condo fee
- Not listed - ask Zach
- What the fee covers
- Not listed - ask Zach
- Special assessments
- Not listed - ask Zach
- Mandatory club / membership
- Not required per the MLS
- Insurance (estimate)
- About $6,136/yr (homeowners policy, county average). Get a real quote before you offer.Florida OIR county average with wind, data as of Mar 31 2026
- Flood zone
- Not listed - ask Zach
- Monthly payment (estimate)
- $137,348/mo: $106,041 loan + $30,796 tax + $511 insurance. 20% down, 7.24% rate (Freddie Mac, week of October 29, 2026), 30 years. Change the numberszach.homes calculator (not a loan offer)
- Year built
- 2003
- Days on market
- About 8 days
- Price history (this listing)
- Listed Oct 23, 2026.
Details
- TypeHouse
- Beds7 bd
- Baths7.5
- Size6,497 sqft
- Year built2003
- Parking4 garage
- PoolPrivate
- WaterfrontYes: Ocean Access, Canal Front, Lagoon, No Fixed Bridges
- ViewLagoon
- NeighborhoodHURRICANE COVE
- ZIP33149
- MLS #A12111835
- To the beachAbout 1.0 mi (straight line to the nearest ocean beach, OpenStreetMap; not a drive time)
Check your commute (opens maps)
From the listing
Enjoy Paradise Found on the exclusive island of Key Biscayne This extraordinary 7,000sqft waterfront estate sits on a rare double lot located on Hurricane Harbor overlooking tranquil Manatee Lagoon. The property offers an unparalleled sanctuary of luxury and seclusion with features including a 4 car garage ideal for collectors, professionally landscaped yard well suited for outdoor entertaining, 7 bedrooms and 7.5 baths including live-in staff quarters. Expansive living areas flow seamlessly to large outdoor, covered porches becoming your al fresco living room for outdoor dining or relaxing and soaking in the beauty of the natural environment as dolphins and manatees swim in your backyard. As the sun hits the horizon, the afterset lights up the sky illuminating the clouds in a breathtaking array of tropical colors. Text listing agent. 24hr notice
Monthly payment calculator
Rate: 7.24% 30-year fixed average (Freddie Mac, week of October 29, 2026). Your own rate may differ; you can change it here.
Estimate, not a loan offer. Tax default: the higher of the seller's bill and about 1.9% of price (Florida resets a new owner's assessment). Insurance default: Florida OIR county average with wind, data as of Mar 31 2026. Rate is an assumption; your lender sets the real one. Zach doesn't take lender or title referral fees.
Florida risk facts
- Flood zone
- Not checked yet. Look it up on FEMA's map or ask Zach.
- Wind and building code
- Built in 2003, after the statewide Florida Building Code took effect in 2002. Ask for the wind mitigation report; it can lower insurance. My Safe Florida Home offers free inspections and grants when funded.
- Disclosure
- Florida sellers must give you a flood disclosure about known flood damage, insurance claims and federal assistance (§689.302).
We don't show crime scores or rate neighborhoods. Every listing is open to everyone.
Start an offer
- Pre-approval letter or proof of funds (cash)
- The price you'd offer and your deposit
- Financing type and closing date
- Inspection period you want (often 10-15 days)
- A signed buyer agreement with Zach (Florida practice before touring or offering)
Nothing here is a binding offer. Zach calls you, checks the comps and writes the contract with you.
Ask Zach anything
One tap opens a text with this address filled in.
Zach replies personally within 15 minutes, 8 AM to 9 PM ET, 7 days. Outside those hours, by 9 AM.
From finding it to the keys, one agent
- Find it
Every home for sale and rent from the MLS, with the real monthly cost. Or tell Zach what you want and he looks for you. - Tour it
Same day when the listing side allows, in person or live video. - Afford it
Real Florida costs up front: taxes, HOA, insurance, flood zone, assessments. Buyers: pre-approval with a lender you choose. Renters: your renter résumé and documents in one place. - Make the offer or apply
Zach writes the offer or the application, negotiates, and handles the association approval. - Close or get the keys
Zach tracks every deadline through inspections, condo documents and closing or lease signing, then stays your agent after.
Report a problem with this listing
Wrong price, already sold, wrong photos, or something that looks like a scam copy? This goes straight to Zach, who fixes or escalates it within 2 business days.
Never send a deposit by Zelle, Cash App, wire or crypto, and never before you've seen the home with a licensed agent.
Chat with Zach
Zach typically replies within 15 minutes, 8 AM to 9 PM ET. After hours, by 9 AM.
Your messages go to Zach only. Reply STOP anytime and he won't follow up again.
Listing courtesy of Three Bridges Realty, LLC · 305-345-2023 · BeachesMLS
All listings featuring the BMLS logo are provided by BeachesMLS, Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Copyright ©2026 BeachesMLS, Inc. Listing data last updated Oct 31, 2026, 9:34 AM ET. Listing information is deemed reliable but not guaranteed. zach.homes estimates and Zach's notes are shown separately from MLS data and labeled with their source.