Five priority entries across Fisher Island and Key Biscayne, with a private-client framework for evaluating unattended ownership, water monitoring, humidity controls, and emergency decision-making. Construction status and delivery expectations remain distinct from verified operational readiness.
For a residence occupied intermittently, the most consequential luxury may be knowing exactly what happens when nobody is home. A private-client briefing should look beyond finishes and views to a quieter set of questions: who notices a leak, who receives a humidity alert, and who can act without waiting for an owner in another time zone?
Fisher Island and Key Biscayne warrant that conversation at the property-selection stage. At The Residences at Six Fisher Island, anticipated delivery makes handover documentation particularly relevant. Elsewhere, planned developments call for earlier questions about specifications, while individual residences require address-specific management arrangements.
The ranking below prioritizes development activity, scale, and disclosed transaction values-not investment performance or construction quality. Its five entries encompass six developments, with two addresses grouped in the final entry. Status ranges from construction approaching completion to planned development and portfolio properties without established construction milestones. None should be assumed to offer verified leak detection, automatic shutoff, humidity monitoring, or emergency-response services.
1. The Residences at Six Fisher Island - 6 Fisher Island Drive
Planned for 50 residences on Fisher Island’s northern shoreline, Six Fisher Island was entering its final construction stages in August 2026, with tower cranes removed. Anticipated completion is Q1 2027, although timing estimates have varied. Its scale and advanced construction place it first in this briefing.
The buyer’s priority is the handover package: plumbing and waterproofing test records, HVAC commissioning documentation, shutoff maps, and warranties. Request a clear division of residence-level and building responsibilities, then establish whether any monitoring arrangements will be operational when possession transfers.
2. The Mansions on Fisher Island - Fisher Island residences
Three sales totaling $105.5 million were announced in July 2026. Those three residences were under construction, with estimated deliveries between Q4 2026 and Q2 2027. Construction activity and transaction values place this entry second; those delivery expectations should not be extended to unspecified residences.
For an absentee owner, the practical question is who is responsible for the individual property. Before handover, seek an inspection schedule, named alert recipients, access arrangements, and authority for urgent repairs. Transaction value alone says nothing about the scope of an included management service.
3. 301 Ocean Drive / Silver Sands Key Biscayne - Oceanfront planned development
This planned condominium would bring 56 residences to approximately 3.8 acres at 301 Ocean Drive, replacing the former Silver Sands Beach Resort. The joint venture is between Terra Group and Fortune International Group. Late-2026 construction commencement and 2029 delivery remain projections, not confirmed milestones.
Here, the briefing should focus on specifications before treating future operations as settled. Ask which water-monitoring and humidity-control provisions are contemplated, which would be standard or optional, and whether monitoring obligations will be documented separately from equipment installation. Planned status does not confirm that construction is underway.
4. Key Biscayne House - 571 Glenridge Road
The residence at 571 Glenridge Road is identified within a three-property Key Biscayne House development portfolio. Its construction stage and delivery date are not established. It belongs in the briefing as a smaller-scale residential option, not a confirmed near-term handover.
The first diligence step is to confirm status and obtain address-specific specifications. Then define who would inspect the home during an extended absence, maintain access credentials, test installed sensors, and coordinate approved contractors. Portfolio-level descriptions are no substitute for the property’s own documentation.
5. Key Biscayne House - 599 Glenridge Road and 785 Fernwood Road
These two addresses complete the identified three-property portfolio and share the final briefing position. They are separate developments, not a combined project. Neither construction stage nor delivery date is established for either address.
Treat them as two distinct operating files. Request separate equipment schedules, warranties, shutoff locations, inspection proposals, and emergency-contact arrangements. A shared portfolio does not establish identical systems, service contracts, or management authority.
A useful absence plan connects equipment to accountable people. For a client also considering Palazzo della Luna, the same questions belong in the property comparison, without assuming equivalent systems or services. Ask for written answers in four areas:
Coverage: Request a sensor map identifying monitored locations, along with exclusions and maintenance responsibilities.
Intervention: Establish whether a water alert sends only a notification or can trigger a shutoff, and identify the valves involved.
Escalation: Name the first recipient, backup recipient, and person responsible for arranging attendance.
Verification: Request an agreed testing procedure and a record of alert receipt and any authorized intervention.
Response-time commitments should cover both acknowledgement and physical attendance. Ask what happens if an alert is missed, connectivity fails, or the primary contact cannot be reached. These are proposed diligence requirements, not confirmed features of the ranked properties.
Treat humidity management as a distinct operating question, not a presumed consequence of air-conditioning. Request the intended absence settings, humidity alarm thresholds, HVAC-condensate alarm provisions, and responsibility for reviewing notifications. Have the relevant professionals confirm appropriate settings for the residence rather than adopting a generic number.
The same discipline can guide a comparison involving Oceana Key Biscayne: ask for the residence’s actual control configuration and service responsibilities rather than inferring them from its address or positioning. Confirm which functions are installed, which are proposed, and which require a separate agreement.
Before departure, seek a documented check of agreed settings and alert routing. Settle inspection frequency, service access, and notification procedures with the appointed manager rather than leaving them as informal expectations.
Access, authorization, and payment approval deserve separate treatment. A person may hold a key without an agreed mandate to approve repairs. Ask counsel and management to document who may enter, isolate water, appoint contractors, authorize remediation, and incur emergency expenditure, subject to applicable requirements and governing documents.
The final briefing should contain named contacts and backups, agreed spending limits, access procedures, and a recordkeeping protocol. Specify the circumstances requiring owner approval and the escalation route if the owner is unreachable. Written arrangements are a diligence recommendation, not a universal legal conclusion about verbal permission.
The strongest ownership plan makes responsibility explicit before an incident. Development status helps determine when to ask; residence-specific documentation determines whether the answers are sufficient for the client’s intended absences.
For a discreet discussion of these residences and your ownership priorities, connect with MILLION.
If branded residences are on your mind — as a home or as an allocation — we would be glad to share what we are seeing, privately.
Begin a quiet conversationNo. The entries include construction-stage residences, a planned condominium, and portfolio properties whose construction stages are not established.
The fifth entry groups 599 Glenridge Road and 785 Fernwood Road. They remain separate developments and warrant separate diligence files.
Its 50-residence scale and advanced construction support its priority position. The ranking does not assess investment returns or construction quality.
Anticipated completion is Q1 2027, although timing estimates have varied. That remains an estimate rather than a guaranteed delivery date.
Three sales totaling $105.5 million were announced in July 2026. Those residences were under construction, with estimated deliveries from Q4 2026 through Q2 2027.
The planned development comprises 56 oceanfront residences on approximately 3.8 acres. Late-2026 construction commencement and 2029 delivery are projections, not confirmed milestones.
Project-specific leak-detection and automatic-shutoff capabilities are not established. Buyers should request sensor maps, valve specifications, and monitoring responsibilities.
Request intended absence settings, alarm thresholds, condensate alarm provisions, and named notification recipients. Appropriate settings should be confirmed for the individual residence.
Request plumbing and waterproofing test records, HVAC commissioning documentation, shutoff maps, and warranties. Pair them with a written absence-response plan.
Ask counsel and management to document access, water-isolation authority, contractor appointment, and emergency spending limits. Include backup contacts and an escalation route if the owner cannot be reached.
