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The Mansion on the Sea is an adults-only property. All guests must be 18 years of age or older.

Plan Your Vacation in Paradise

Welcome to The Mansion on the Sea, the only island Inn situated directly oceanfront in beautiful Key West. 

Plan Your Vacation in Paradise

Welcome to The Southernmost House, a historic beachfront Key West boutique hotel.

Guest Rooms
Continental Breakfast, Ocean View
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About Us

Travelers searching for the perfect accommodations when visiting Key West, often look to The Mansion on the Sea, as the quintessential destination in paradise! Our staff promises hospitality from the heart and service with a smile. Visit our website, or call us directly to select your favorite room, make your reservation or inquire about availability for large groups, events, and/or weddings. 

Mansion Front

What We Offer

A daily amenities fee of $27.00 affords our guests the following:


Daily from 8:00 a.m. to 10:00 a.m.


Locally Ground & Roasted Cuban Coffee

Assortment of Fresh Pastries & Bagels

Eggs, Cheese, Cereal, Oatmeal & Yogurt

Fresh Fruit

Orange Juice & Almond Milk

Gluten Free Options Available Upon Request

Free Wi-Fi

Secure Wi-fi Property-Wide


Every Room - Every Day - Before 2:00 p.m.

Private Pool

Heated, zero entry infinity pool - 24 hour day

Pool towels for your convenience

Pool-side lounge chairs & umbrellas

Pool-side bar & cafe service (upon request)


The Seaside Café at the Mansion

#1 Island Eatery

Open Daily 11:30 AM to 8:00 PM


 Famous Lobster Pizza

Menu includes Gluten Free Items

  Full Service Bar – Craft Cocktails

    Mansion Mojito’s & Margaritas

On-site self-parking ($20.00 daily)

Guaranteed parking on site -  During your stay

Concierge Services 

Personal Assistance - Knowledgeable Staff

8:00 a.m. to 10:00 p.m.

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Feel the Stress Melt Away

Melt away the stress by staying in one of our elegantly appointed, amenity-rich guestrooms, spacious suites, or our stylish Lopez House.

Plan Your Stay In Paradise at The Mansion on the Sea

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