See all properties

The Mansion on the Sea - Southernmost House in the USA

4.0 star property
Adults-only beach hotel with outdoor pool

Choose dates to view prices

Photo gallery for The Mansion on the Sea - Southernmost House in the USA

Mansion Room #201 - Ocean View with private balcony - Adults Only | Terrace/patio
Mansion Room #106 - Ocean View w/ Direct Pool Access - Adults Only | Premium bedding, pillowtop beds, individually furnished
Bungalow #101 -Ocean Front - Adults Only | Living area | 42-inch flat-screen TV with cable channels, TV, streaming services
Terrace/patio
Front of property - evening/night

Reviews

9.4 out of 10
Exceptional

Popular amenities

  • Bar
  • Room service

Room options

Available filters for rooms
Showing 18 of 18 rooms

View all photos for Mansion Room #204 - Courtyard View - Adults Only

Mansion Room #204 - Courtyard View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #204 - Courtyard View - Adults Only

Highlights

Balcony
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Mansion Room #107 - Ocean View - Adults Only

Mansion Room #107 - Ocean View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #107 - Ocean View - Adults Only

Highlights

Balcony or patio
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • Ocean view
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Mansion Room #203 - Courtyard View - Adults Only

Mansion Room #203 - Courtyard View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #203 - Courtyard View - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
Designer toiletries
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Bungalow #101 -Ocean Front - Adults Only

Bungalow #101 -Ocean Front - Adults Only | Premium bedding, pillowtop beds, individually furnished

Bungalow #101 -Ocean Front - Adults Only

Highlights

Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • Ocean view
  • 46 sq m
  • Sleeps 4
  • 1 King Bed and 1 Queen Sofa Bed OR 1 King Bed

View all photos for Mansion Room #106 - Ocean View w/ Direct Pool Access - Adults Only

Mansion Room #106 - Ocean View w/ Direct Pool Access - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #106 - Ocean View w/ Direct Pool Access - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
Designer toiletries
  • Partial ocean view
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Mansion Room #201 - Ocean View with private balcony - Adults Only

Mansion Room #201 - Ocean View with private balcony - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #201 - Ocean View with private balcony - Adults Only

Highlights

Balcony or patio
Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
  • Ocean view
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Mansion Room #202 - Ocean View - Adults Only

Mansion Room #202 - Ocean View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #202 - Ocean View - Adults Only

Highlights

Balcony
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • Ocean view
  • 28 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Mansion Room #301 - Tower Outlook to Ocean View - Adults Only

Mansion Room #301 - Tower Outlook to Ocean View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #301 - Tower Outlook to Ocean View - Adults Only

Highlights

Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • Ocean view
  • 28 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Lopez House #108 - King Courtyard Suite with Kitchen - Adults Only

Lopez House #108 - King Courtyard Suite with Kitchen - Adults Only | Premium bedding, pillowtop beds, individually furnished

Lopez House #108 - King Courtyard Suite with Kitchen - Adults Only

Highlights

Separate dining area
Separate sitting area
Individually furnished
Air conditioning
Kitchen
Dishwasher
HDTV
Separate bedroom
  • Partial ocean view
  • 65 sq m
  • Sleeps 4
  • 1 King Bed and 1 Queen Sofa Bed

View all photos for Mansion Room #302 - Oceanview - 1 King Bed - Adults Only

Mansion Room #302 - Oceanview - 1 King Bed - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #302 - Oceanview - 1 King Bed - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
Designer toiletries
  • Partial ocean view
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Bungalow #102 - Pool View - Adults Only

Bungalow #102 - Pool View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Bungalow #102 - Pool View - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
Designer toiletries
  • 37 sq m
  • Sleeps 4
  • 1 Queen Bed and 1 Double Sofa Bed

View all photos for Cottage #104 - Ocean View w/Direct Pool Access - Adults only

Cottage #104 - Ocean View w/Direct Pool Access - Adults only | Premium bedding, pillowtop beds, individually furnished

Cottage #104 - Ocean View w/Direct Pool Access - Adults only

Highlights

Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • 28 sq m
  • Sleeps 4
  • 1 King Bed and 1 Double Sofa Bed

View all photos for Mansion Room #303 - Courtyard View - Adults Only

Mansion Room #303 - Courtyard View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Mansion Room #303 - Courtyard View - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
Designer toiletries
  • City view
  • 46 sq m
  • Sleeps 4
  • 2 Queen Beds

View all photos for Lopez House #109 - Courtyard View - Adults Only

Lopez House #109 - Courtyard View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Lopez House #109 - Courtyard View - Adults Only

Highlights

Balcony or patio
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • 46 sq m
  • Sleeps 2
  • 1 Queen Bed

View all photos for Lopez House #205 - Partial Ocean View - Adults Only

Lopez House #205 - Partial Ocean View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Lopez House #205 - Partial Ocean View - Adults Only

Highlights

Balcony
Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
  • Ocean view
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Lopez House #206 - Partial Ocean View - Adults Only

Lopez House #206 - Partial Ocean View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Lopez House #206 - Partial Ocean View - Adults Only

Highlights

Balcony
Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
  • Ocean view
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Lopez House #207 - Courtyard View - Adults Only

Lopez House #207 - Courtyard View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Lopez House #207 - Courtyard View - Adults Only

Highlights

Balcony
Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

View all photos for Bungalow #103 - Pool View - Adults Only

Bungalow #103 - Pool View - Adults Only | Premium bedding, pillowtop beds, individually furnished

Bungalow #103 - Pool View - Adults Only

Highlights

Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillowtop bed
Premium bedding
Private bathroom
Hair dryer
  • 28 sq m
  • Sleeps 2
  • 1 Queen Bed

Similar properties

3 outdoor pools, pool umbrellas, sun loungers

Southernmost Beach Resort and Guesthouses

  • Pool
  • Spa
  • Free WiFi
  • Restaurant
8.8 out of 10, Excellent, 2,506 reviews
Southernmost Beach Resort and Guesthouses

About the neighborhood

Map
1400 Duval Street, Key West, FL, 33040

What's nearby

  • Duval Street - 1 min walk - 0.0 miles
  • South Beach - 1 min walk - 0.0 miles
  • Southernmost Point - 2 min walk - 0.1 miles
  • Ernest Hemingway Home and Museum - 8 min walk - 0.4 miles
  • Mallory Square - 4 min drive - 1.1 miles

Getting around

  • Key West Intl. Airport (EYW) - 9 min drive

Restaurants

  • ‪Old Town Tavern Key West - ‬9 min walk
  • ‪Southernmost Beach Café - ‬1 min walk
  • ‪Southernmost Point Bar In the USA - ‬5 min walk
  • ‪Rum Bar at the Speakeasy Inn - ‬5 min walk
  • ‪Banana Cafe - ‬4 min walk

About this property

The Mansion on the Sea - Southernmost House in the USA

Upscale hotel near Southernmost Point
Located close to Key West Butterfly and Nature Conservatory and South Beach, The Mansion on the Sea - Southernmost House in the USA provides free continental breakfast, a poolside bar, and a terrace. The on-site restaurant, Seaside Cafe at Mansion, offers lunch, dinner, and ocean views. In addition to shopping on site and a garden, guests can connect to free in-room WiFi, with speed of 500+ Mbps (good for 6+ people or 10+ devices).
Other perks at this hotel include:
  • An outdoor pool with sun loungers and pool umbrellas
  • Self parking (surcharge), a gift shop, and a TV in the lobby
  • A porter/bellhop, concierge services, and beach towels
  • A reception hall, luggage storage, and a front-desk safe
  • Guest reviews speak highly of the helpful staff, first-rate property condition, and location
Room features
All guestrooms are individually furnished, and include comforts such as premium bedding and air conditioning, in addition to thoughtful touches like free WiFi and free newspapers.
More amenities include:
  • Designer toiletries, showers, and hair dryers
  • 42-inch HDTVs with streaming services and premium channels
  • Coffee/tea makers and daily housekeeping

Languages

English, French, Russian, Spanish

Property amenities

Internet

  • Available in all rooms: Free WiFi
  • In-room WiFi speed: 500+ Mbps (good for 6+ people or 10+ devices)
  • Available in some public areas: Free WiFi

Parking and transportation

  • Self parking on site (USD 25 per night)

Food and drink

  • Free continental breakfast available daily 8:00 AM to 10:00 AM
  • A bar/lounge
  • A poolside bar
  • A restaurant
  • Coffee and tea in common areas
  • Snack bar/deli

Restaurants on site

  • Seaside Cafe at Mansion

Things to do

  • Outdoor pool
  • Shopping
  • TV in common areas

Conveniences

  • Free newspapers in lobby
  • Gift shop/newsstand
  • Limited-hour front desk
  • Luggage storage
  • Safe at front desk

Guest services

  • Concierge services
  • Housekeeping (daily)
  • Multilingual staff
  • Porter/bellhop
  • Proposal/romance packages
  • Tour and ticket assistance
  • Wedding services

Outdoors

  • Beach loungers
  • Beach towels
  • Garden
  • On the waterfront
  • Outdoor furniture
  • Picnic area
  • Pool loungers
  • Pool umbrellas
  • Terrace

Accessibility

  • If you have requests for specific accessibility needs, please contact the property using the information on the reservation confirmation received after booking.
  • Upper floors accessible by stairs only
  • Well-lit path to entrance

More

  • 3 buildings
  • 3 floors
  • Built in 1897
  • Designated smoking areas
  • Reception hall
  • Victorian architecture

Room amenities

Bedroom

  • Pillowtop mattress
  • Premium bedding

Bathroom

  • Designer toiletries
  • Hair dryer
  • Shampoo
  • Shower
  • Soap
  • Toilet paper
  • Towels provided

Entertainment

  • 42-inch flat-screen TV with premium cable channels
  • Streaming services

Food and drink

  • Champagne service
  • Coffee/tea maker
  • Room service

More

  • Air conditioning
  • Free daily newspapers
  • Individual furnishings
  • Iron/ironing board

Policies

Check-in

Check-in start time: 4 PM; Check-in end time: 10 PM
Early check-in subject to availability
Contactless check-in available
Late check-in subject to availability
Minimum check-in age: 18

Check-out

Check-out before 11 AM
Contactless check-out available

Special check-in instructions

The front desk is open daily from 8:00 AM - 10 PM
Front desk staffed during limited hours
If you are planning to arrive after 8:00 PM please contact the property in advance using the information on the booking confirmation

Access methods

Front desk (limited hours)

Pets

Pets not allowed

Children and extra beds

Children younger than 18 are not allowed at this adults-only property; all guests 18 and older are welcome
Cribs (infant beds) are not available

Property payment types

Important information

Fees

You'll be asked to pay the following charges at the property. Fees may include applicable taxes:

  • Spring Break deposit: USD 250 per stay for guests under 21 years old staying between 1 March - 31 March

We have included all charges provided to us by the property.

Optional extras

  • Self parking fee: USD 25 per night

The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.

You need to know

Extra-person charges may apply and vary depending on property policy
Government-issued photo identification and a credit card, debit card, or cash deposit may be required at check-in for incidental charges
Special requests are subject to availability upon check-in and may incur additional charges; special requests cannot be guaranteed
Minimum Spring Break check-in age is 24 years old
This property accepts credit cards; cash is not accepted
Noise-free guestrooms cannot be guaranteed
Safety features at this property include a carbon monoxide detector, a fire extinguisher, and a smoke detector
This property has outdoor spaces, such as balconies, patios, terraces which may not be suitable for children; if you have concerns, we recommend contacting the property prior to your arrival to confirm they can accommodate you in a suitable room

We should mention

This property does not have elevators
Children 18 years old and younger are not permitted at this adults-only property
Only registered guests are allowed in the guestrooms

Property is also known as

Southernmost House
Southernmost House Hotel
Southernmost House Hotel Key West
Southernmost House Key West
Southernmost House
The Southernmost House Hotel
The Southernmost House Hotel Adults Only
The Mansion on the Sea Southernmost House in the USA
The Mansion on the Sea - Southernmost House in the USA Hotel
The Mansion on the Sea - Southernmost House in the USA Key West

Frequently asked questions

Does The Mansion on the Sea - Southernmost House in the USA have a pool?

Yes, this property has an outdoor pool.

Is The Mansion on the Sea - Southernmost House in the USA pet-friendly?

No, pets are not allowed at this property.

How much is parking at The Mansion on the Sea - Southernmost House in the USA?

Self parking is available for USD 25 per night.

What time is check-in at The Mansion on the Sea - Southernmost House in the USA?

Check-in start time: 4 PM; Check-in end time: 10 PM. Late check-in is available during limited hours.

What time is check-out at The Mansion on the Sea - Southernmost House in the USA?

Check-out is at 11 AM.

Where is The Mansion on the Sea - Southernmost House in the USA located?

Located in Old Town Key West, this beach hotel is steps from Southernmost Point, Duval Street, and South Beach. Key West Butterfly and Nature Conservatory and Ernest Hemingway Home and Museum are also within 10 minutes.

Have a question?

AI iconBeta

Get instant answers with AI powered search of property information and reviews.

The Mansion on the Sea - Southernmost House in the USA Reviews

Reviews

9.4

Exceptional

Rating 10 - Excellent. 751 out of 1005 reviews
Rating 8 - Good. 164 out of 1005 reviews
Rating 6 - Okay. 59 out of 1005 reviews
Rating 4 - Poor. 20 out of 1005 reviews
Rating 2 - Terrible. 11 out of 1005 reviews

9.4/10

Cleanliness

9.4/10

Staff & service

9.2/10

Amenities

9.0/10

Property conditions & facilities

9.2/10

Eco-friendliness

Reviews

10/10 Excellent

Leslie

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Fantastic location with friendly staff
Stayed 3 nights in Jun 2025

10/10 Excellent

Vicki

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Beautiful property in stellar location. Wonderful staff, excellent accommodations and above and beyond breakfast bar. Convenient to restaurants and shopping. Will definitely stay again!
Stayed 1 night in May 2025

10/10 Excellent

Jared

Liked: Cleanliness, amenities, property conditions & facilities
Exceptional property. The bar and restaurant was great as well. I would love to stay here again.
Stayed 1 night in May 2025

8/10 Good

Ian

Liked: Staff & service, amenities
The history of the Mansion on the Sea and its location make it worth staying there.
Stayed 5 nights in Apr 2025

10/10 Excellent

Dawn

Liked: Cleanliness, staff & service, property conditions & facilities
The staff was excellent and our room was very clean. The location is fantastic. We really enjoyed our stay.
Stayed 4 nights in Apr 2025

10/10 Excellent

Larry

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Best place to stay on Key West.
Stayed 3 nights in Mar 2025

10/10 Excellent

Michael D

Liked: Cleanliness, amenities
Very comfortable Victorian Mansion on the water. Calm relaxed atmosphere.
Stayed 3 nights in May 2025

10/10 Excellent

David

Liked: Amenities
Staff was very friendly and extremely helpful
Stayed 4 nights in May 2025

10/10 Excellent

Scott

Liked: Cleanliness, staff & service, property conditions & facilities
The staff was excellent!!
Stayed 4 nights in Apr 2025

10/10 Excellent

Julia

Great trip!
Stayed 4 nights in Apr 2025

10/10 Excellent

Shani

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Wonderful property right on the Beach!
Stayed 1 night in May 2025

8/10 Good

Nathaniel

Liked: Cleanliness, amenities, property conditions & facilities
Room was great! The Balcony was a bonus that we were not expecting! Staff and grounds crew were vey friendly and helpful. Had a great time and would definitely stay again.
Stayed 1 night in May 2025

10/10 Excellent

Tiffany

Liked: Staff & service, property conditions & facilities
The history in the house is rich. Even though it’s on the end of Dual it was quiet and we did not have a bunch of noise when trying to sleep or seep in. Breakfast in the morning was great.
Stayed 4 nights in Jun 2025

10/10 Excellent

Leigh

Liked: Amenities, property conditions & facilities
The staff was wonderful and the room was big and very clean.
Stayed 1 night in Apr 2025

10/10 Excellent

Daniel C

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Semi private and great staff!!!!!
Stayed 4 nights in Apr 2025

8/10 Good

Ernest

Convenient to downtown
Stayed 1 night in Mar 2025

10/10 Excellent

Elisabeth

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Beautiful mansion directly on the water. Pool was heated & amazing. Staff were attentive & very accommodating.
Stayed 4 nights in Apr 2025

10/10 Excellent

Bonnie

The breakfast was wonderful and the desk staff were extremely helpful.
Stayed 2 nights in Feb 2025

10/10 Excellent

Cynthia

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Beautiful site. Room 302 was clean with a comfortable bed and beautiful view from stain glass window. All great. Staff was friendly and outside bar was great. Easy walk to other places or they called a car to take us to our destination.
Stayed 1 night in May 2025

10/10 Excellent

david

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The property is great. The staff are eager to help. The history of the property is awesome.
Stayed 2 nights in Apr 2025

10/10 Excellent

Susan L

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
we loved mansion on the sea ! will definitely be back ps and the breakfast was outstanding!
Stayed 2 nights in Mar 2025

10/10 Excellent

Edward

Liked: Staff & service, property conditions & facilities
Staff and location could not have been nicer.
Stayed 4 nights in Jan 2025

6/10 Okay

joseph

Closeness to dining and entertainment and The sea.
Stayed 3 nights in Mar 2025

10/10 Excellent

Debra

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort

Mansion at Southernmost House

Beautiful property, very friendly staff, and great location.
Stayed 3 nights in Feb 2025

10/10 Excellent

Ken

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Excellent staff and historic and beautiful property. Small breakfast was very nice as we are not full breakfast type people. Only downside is the second level of the margarita/mojito bar next door faced directly towards our room on the 2nd floor so we just closed the curtains on that side. Very convenient location to beach, bars, restaurants, and shopping. Would definitely stay again when we come back to Key West.
Stayed 2 nights in Apr 2025