zach.homesRealty Hub 754-332-7529

Zach Curtis, REALTOR®, Realty Hub, license SL3664129 · 754-332-7529

$8,000,000544 Warren Lane, Key Biscayne, FL 33149

6 bd · 5.5 ba · 1,044 sqft · On the market about 64 days · Active

Listing courtesy of Duncan Studio Real Estate Division PLLC · 305-979-2520 · BeachesMLS

Full disclosure: what this home really costs

9 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
$8,000,000 · $7,663/sqft
Property taxes
$29,546/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
Zone AE: high-risk flood area, base flood elevation 10 ft. Lenders require flood insurance here; get a quote.FEMA flood map, checked Oct 31, 2026
Monthly payment (estimate)
$56,794/mo: $43,616 loan + $12,667 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
2026 · 2 stories
Days on market
About 64 days
Price history (this listing)
Listed Aug 29, 2026.
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Details

  • TypeHouse
  • Beds6 bd
  • Baths5.5
  • Size1,044 sqft
  • Year built2026
  • PoolPrivate
  • ViewGarden, Pool
  • FurnishedFurnished
  • 55+ statusMarked 55+ in MLS - ask Zach to confirm
  • NeighborhoodTROPICAL ISLE HOMES SUB
  • ZIP33149
  • MLS #A12079811
  • To the beachAbout 0.8 mi (straight line to the nearest ocean beach, OpenStreetMap; not a drive time)

Check your commute (opens maps)

From the listing

New construction, this extraordinary custom Cape Dutch residence is a masterwork of timeless design, brought to life by Duncan and Heuser Design and Development, with interiors curated by James Duncan. Every detail, from the graceful gabled facade to the refined finishes within, reflects a rare devotion to craftsmanship and enduring elegance. Offering six generously proportioned bedrooms and six and a half beautifully appointed bathrooms, this home balances gracious scale with warm, livable comfort. Soaring ceilings, thoughtfully placed windows, and an effortless flow between rooms create a sense of light and openness throughout, while curated materials and bespoke millwork lend a distinctly luxurious character to every space. This is more than a house; it is a legacy residence, designed to be lived in beautifully for generations. A truly rare offering for the discerning buyer seeking timeless architecture, exceptional interiors, and uncompromising quality throughout.

Virtual tour

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.

Estimate closing costs for this home

Florida risk facts

Flood zone
Zone AE: high-risk flood area. A FEMA Special Flood Hazard Area (about a 1% chance of flooding each year). Lenders require flood insurance for federally backed mortgages here. Source: FEMA National Flood Hazard Layer, checked Oct 31, 2026. This is a map lookup, not an official flood zone determination.
Wind and building code
Built in 2026, 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

  1. Pre-approval letter or proof of funds (cash)
  2. The price you'd offer and your deposit
  3. Financing type and closing date
  4. Inspection period you want (often 10-15 days)
  5. A signed buyer agreement with Zach (Florida practice before touring or offering)

Rather not check the box? That's fine. Zach will call or email instead.

Zach replies personally within 15 minutes, 8 AM to 9 PM ET, 7 days. Outside those hours, by 9 AM. Your info goes to Zach only. Never sold, never shared. You choose how he reaches you, and STOP always works.

Nothing here is a binding offer. Zach calls you, checks the comps and writes the contract with you.

Tour 544 Warren Lane, Key Biscayne, FL 33149

Pick a time; same-day tours when the listing side allows. Zach confirms with the listing agent and texts you. Before a buyer tour Zach sends a short, plain-language buyer agreement to sign.

Pick a day

Soonest: Tomorrow 9:00 AM.

Rather not check the box? That's fine. Zach will call or email instead.

Zach replies personally within 15 minutes, 8 AM to 9 PM ET, 7 days. Outside those hours, by 9 AM. Your info goes to Zach only. Never sold, never shared. You choose how he reaches you, and STOP always works.

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

  1. 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.
  2. Tour it
    Same day when the listing side allows, in person or live video.
  3. 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.
  4. Make the offer or apply
    Zach writes the offer or the application, negotiates, and handles the association approval.
  5. 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.

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Listing courtesy of Duncan Studio Real Estate Division PLLC · 305-979-2520 · 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.

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