Memberships
Every stewardship begins with a Comprehensive Audit, the establishment of a secure Private Estate Library, and a structured, forward-looking maintenance plan.
The Private Estate Library serves as your estate’s digital command center, like a living archive of architectural records, system specifications, warranties, service history, vendor credentials, and lifecycle planning. Confidential. Organized. Continuously stewarded.
Four levels of engagement.
One consistent standard.
From refined coordination to comprehensive estate oversight, engagement expands with the complexity and cadence of your property.
Learn more about our Membership Levels …
The Harrington
Essential Property Coverage
For homeowners who want dependable, year-round coordination for the core services that protect their property, preserve curb appeal, and keep seasonal maintenance on track. The Harrington is the foundational level of the Sentinels service. Practical, proactive, and built around consistency.
Best Fit
Ideal for luxury homeowners seeking strong foundational oversight across exterior upkeep, seasonal transitions, essential systems, and emergency coordination.
Service Cadence
A structured 12-month calendar focused on inspections, seasonal readiness, exterior upkeep, HVAC checks, irrigation and pool coordination, winterization, and year-end reporting.
The Heritage
Arthur Harrington
The Prudent Landowner - A fictional character of the Nineteenth Century
Arthur Harrington, an archetypal self-made industrialist of the late nineteenth century, was a man who built something real through discipline, resourcefulness, and an unrelenting sense of responsibility. He acquired a fine property, not as a trophy, but as an extension of his character. He is organized, practical, and deeply wary of being caught unprepared. He does not want someone running his life, he wants someone watching the foundation while he is focused elsewhere.
Arthur would walk his property each Sunday, clipboard in hand, noting what needed attention. He would return to find it already addressed. He sleeps well, not because he is careless, but because he has put the right people in place.
Home owners choosing the Harrington Membership level demand reliability. They want the call made before the leak becomes the flood.
Services Included
General property inspections
Landscape and lawn care
Snow and ice removal
Exterior pressure washing
Window cleaning
Gutter cleaning and maintenance
HVAC filter changes
Handyman coordination
Interior cleaning coordination
Pest control
Minor lighting and electrical coordination
Minor plumbing coordination
Seasonal property preparation
Pool opening and closing
Irrigation startup and shutdown
Driveway and walkway care
Deck and patio maintenance
Garage door maintenance
Alarm and security system checks
Emergency vendor dispatch
Snow and ice removal
The Caldwell
Full Service Property Care
The Caldwell builds on the Harrington foundation with broader interior coordination, specialty systems oversight, and deeper seasonal planning. It is designed for the actively occupied residence that requires more comprehensive attention throughout the year.
Best Fit
Best for homeowners who want a more involved service model, including additional interior support, smart home oversight, deeper maintenance planning, and closer management of vendors and specialty services.
Service Cadence
A more robust annual calendar with deeper HVAC service, generator testing, indoor air quality review, roof inspections, spa and appliance coordination, seasonal landscape planning, and a year-end client review.
Heritage
Margaret Caldwell
The One Who Leaves Nothing to Chance - A fictional character of the Contemporary Estate
Margaret Caldwell is the formidable matriarch of an established Birmingham family. She is a woman managing a household of extraordinary complexity with a quiet authority and zero tolerance for the preventable. She knows every vendor by name, every seasonal obligation by date, and every property vulnerability by memory. She did not react to problems, she anticipated them. She also expected everyone working for her to do the same.
Margaret would have been the first client in Oakland County to demand a 12-month maintenance calendar. She would have reviewed it herself (in red ink) and returned it with three additions she expected completed before the end of the month. Her relationship with The Sentinels was not transactional. It was a partnership of mutual standards.
The Caldwell does not wait for the boiler to fail in February, as it was serviced in October… because she expects nothing less.
Services Included
Everything in The Harrington, plus:
Interior deep cleaning coordination
Appliance maintenance coordination
Smart home system support
Minor painting and drywall coordination
Flooring care and refinishing coordination
Chimney and fireplace service coordination
Tree and shrub care
Exterior wood staining and sealing
Hot tub and spa maintenance
Generator service and testing
Sump pump inspection
Annual roof inspection
Humidity and air quality monitoring
The Ashford
Full Service Property Care
The Ashford is designed for the high-functioning estate with a broader amenity profile and a greater need for precision, discretion, and concierge-level coordination. This tier supports residences where property care extends well beyond standard maintenance.
Best Fit
Ideal for estates with advanced features such as fine art, wine storage, outdoor kitchens, private recreational amenities, integrated AV, or pre- and post-travel management needs.
Service Cadence
A white-glove annual schedule that includes systems audits, fine art environmental checks, wine cellar monitoring, elevator certification, landscape design management, outdoor living support, and detailed estate-level seasonal planning.
The Heritage
Colonel Edmund Ashford
The Estate Principal - A fictional character of a Commanded Estate
Colonel Edmund Ashford built the grandest property on the ridge. This was not to make a statement, but because anything worth doing was worth doing properly. His estate required full-time coordination, complete with staff accountability, capital planning, vendor oversight, and a point of command that could act without requiring his constant direction. He did not manage his household, he led it from a position of authority and delegated everything below that to a person he trusted completely, his Sentinel.
The Colonel valued one thing above all else in his stated operation: Accountability without excuses. His dedicated Sentinel was an extension of the Colonel’s own authority on the property. Problems were identified, addressed, and documented before they were even brought to the Colonel’s attention. That was the standard and anything less was unacceptable.
The Ashford does not call about a problem.
He expects it to never become one.
Services Included
Everything in The Caldwell, plus:
Fine art and collection care coordination
Interior design coordination
Luxury automotive care coordination
Wine cellar maintenance
Home theater systems support
Custom millwork and cabinetry coordination
In-home elevator maintenance
Whole-home audio/visual systems support
Private tennis court care
Full landscape design management
Outdoor kitchen maintenance
Drainage and erosion control
Concierge vendor sourcing
Pre- and post-travel property management
Priority emergency response
The Elsinore
Essential Property Coverage
For homeowners who want dependable, year-round coordination for the core services that protect their property, preserve curb appeal, and keep seasonal maintenance on track. The Harrington is the foundational level of the Sentinels service. Practical, proactive, and built around consistency.
Best Fit
Ideal for luxury homeowners seeking strong foundational oversight across exterior upkeep, seasonal transitions, essential systems, and emergency coordination.
Service Cadence
A structured 12-month calendar focused on inspections, seasonal readiness, exterior upkeep, HVAC checks, irrigation and pool coordination, winterization, and year-end reporting.
The Heritage
Arthur Harrington
The Prudent Landowner - A fictional character of the Nineteenth Century
Arthur Harrington, an archetypal self-made industrialist of the late nineteenth century, was a man who built something real through discipline, resourcefulness, and an unrelenting sense of responsibility. He acquired a fine property, not as a trophy, but as an extension of his character. He is organized, practical, and deeply wary of being caught unprepared. He does not want someone running his life, he wants someone watching the foundation while he is focused elsewhere.
Arthur would walk his property each Sunday, clipboard in hand, noting what needed attention. He would return to find it already addressed. He sleeps well, not because he is careless, but because he has put the right people in place.
Home owners choosing the Harrington Membership level demand reliability. They want the call made before the leak becomes the flood.
Services Included
General property inspections
Landscape and lawn care
Snow and ice removal
Exterior pressure washing
Window cleaning
Gutter cleaning and maintenance
HVAC filter changes
Handyman coordination
Interior cleaning coordination
Pest control
Minor lighting and electrical coordination
Minor plumbing coordination
Seasonal property preparation
Pool opening and closing
Irrigation startup and shutdown
Driveway and walkway care
Deck and patio maintenance
Garage door maintenance
Alarm and security system checks
Emergency vendor dispatch
Snow and ice removal