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+71 photosLuxury condo — 3425 S Ocean Boulevard PH401 · Le Sanctuaire Condo · Highland Beach












































































$15,450,000
3425 S Ocean Boulevard PH401, Highland Beach, FL 33487
Highland Beach, FL, 33487
4 bd · 5 ba · 3,800 sqft
Listed by Serhant
3425 S Ocean Boulevard PH401, Highland Beach, FL 33487
Listed by Serhant
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Estimated monthly payment
$102,917/mo
Know your costs before you buy
Work through three numbers: your estimated monthly payment, the cash needed at closing, and insurance & flood.
Estimated monthly payment $102,917/mo · principal, interest, taxes, insurance and HOA. Verify before you buy.
Cash to close includes the down payment, lender and title costs, taxes, insurance prepayments and escrow deposits. Editable estimate only.
Insurance and flood: Zone not provided · verify insurance quotes before buying.
About this home
Find similar homesFor the one seeking a feeling that is almost impossible to describe. There are oceanfront residences. And then there are those that simply cannot be matched. Occupying an entire floor at Le Sanctuaire, this extraordinary penthouse is one of only four residences and one of South Florida's rarest private offerings. Reimagined by the building's original developer and fully restored in 2024, every detail reflects a standard of craftsmanship defined not by trend, but by permanence. Arrive by private elevator to a vantage point rivaled only by being at sea. Simply: 180 degrees of uninterrupted Atlantic Ocean, framed by Maxi-View SSG floor to ceiling impact glass. From sunrise onward, the ocean becomes part of the architecture. Stained white oak ceilings, sculptural Calacatta marble, backlit natural crystal quartz, and a bespoke chef's kitchen establish an atmosphere of quiet distinction. The oceanfront primary suite is a private sanctuary of its own, with a boutique-inspired dressing room and a spa-like Dolomite marble bath centered around a freestanding soaking tub and illuminated, book-matched Australis marble. Beyond the glass, expansive terraces, a motorized pergola, private Jacuzzi, dedicated cabana, and lock-and-leave service create an experience that feels less like a penthouse and more like a private estate suspended above the Atlantic. One floor. Only four residences. An entire horizon. Some luxuries can be acquired. Others may never exist again.
Why we flagged this one
A transparent review of current MLS facts—not a paid placement.
119 days on market
Longer time on market usually means the seller is more open to negotiating on price and terms.
Price reductions and days on market come from this listing's MLS record. This is an initial market signal, not a formal appraisal or full comparable market analysis.
Property Details
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Your costs (est.)
≈ $102,917/mo
3425 S Ocean Boulevard PH401, Highland Beach, FL 33487 · Highland Beach
Location
3425 S Ocean Boulevard PH401, Highland Beach, FL 33487
What buyers ask about this home
What are the estimated monthly carrying costs at 3425 S Ocean Boulevard PH401, Highland Beach, FL 33487?+
Property tax (after sale): $15,624/month est.; homeowners insurance: $0/month est.; HOA: $7,126/month. Fixed ownership costs before a mortgage: $22,750/month est. Principal and interest: $80,167/month; PMI: $0/month. Total for the payment scenario shown: $102,917/month est. Flood insurance is not included. Estimate only, not guaranteed. Verify before you buy or sell.
Will property taxes go up after I buy 3425 S Ocean Boulevard PH401, Highland Beach, FL 33487?+
Usually yes. In Florida the assessed value resets to market value in the year after a sale, so the seller's current tax bill is rarely what a new owner pays. Budget roughly 1.8–2.0% of the purchase price annually until you file for homestead exemption and the Save Our Homes cap (or the 10% non-homestead cap) starts limiting increases.
Does 3425 S Ocean Boulevard PH401, Highland Beach, FL 33487 need flood insurance, and what drives the premium?+
Most of Highland Beach sits in a FEMA flood zone, and lenders require flood coverage in high-risk zones. Premiums are driven by elevation certificate, flood zone, roof age and shape, and whether the home has impact windows or accordion shutters. Ask for the current declarations page, the four-point inspection and wind mitigation report early — they set your real cost of ownership.
What should I check about the association before buying 3425 S Ocean Boulevard PH401, Highland Beach, FL 33487?+
For a Florida condo, review the milestone structural inspection and the Structural Integrity Reserve Study, current reserve balances, any pending or recently voted special assessment, the association's insurance and its litigation history. Ask how many units are owner-occupied and whether the lender will approve the building — a poorly funded association is the single biggest hidden cost in a condo purchase.
Can 3425 S Ocean Boulevard PH401, Highland Beach, FL 33487 be rented out?+
Rental rules are set by the association's documents, not the MLS. Many Highland Beach luxury buildings limit leases to once or twice a year with a minimum term and require board approval and an application fee. Request the declaration and rules before your inspection period ends if rental income matters to your plan.
Is there room to negotiate on 3425 S Ocean Boulevard PH401, Highland Beach, FL 33487?+
This listing has been on the market 119 days. Leverage comes from days on market, price history, comparable closed sales and the seller's motivation — not from a fixed percentage. I pull the full history and the true comps before we write, so the offer is built on what the property is actually worth today. Call or text (954) 562-1798 for that analysis.
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