The Mansion on the Sea - Southernmost House in the USA

4.0 star property
Adults-only beach hotel with outdoor pool

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
Front of property - evening/night
Bungalow #101 -Ocean Front - Adults Only | Living area
Terrace/patio
Mansion Room #106 - Ocean View w/ Direct Pool Access - Adults Only

Reviews

9.4 out of 10
Exceptional

Popular amenities

  • Bar
  • Room service
The current price is AU$345
includes taxes & fees
18 June - 19 June

Explore the area

Map
1400 Duval Street, Key West, FL, 33040
  • Duval Street
    ‪1 min walk‬
  • South Beach
    ‪1 min walk‬
  • Southernmost Point
    ‪2 min walk‬
  • Key West, FL (EYW-Key West Intl.)
    ‪8 min drive‬

Room options

Mansion Room #204 - Courtyard View - Adults Only

Highlights

Balcony
Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

Mansion Room #107 - Ocean View - Adults Only

Highlights

Balcony or patio
Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
  • 46 sq m
  • Ocean view
  • Sleeps 2
  • 1 King Bed

Mansion Room #203 - Courtyard View - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
Designer toiletries
  • 46 sq m
  • Sleeps 2
  • 1 King Bed

Bungalow #101 -Ocean Front - Adults Only

Highlights

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

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

Highlights

Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
Designer toiletries
  • 46 sq m
  • Partial ocean view
  • Sleeps 2
  • 1 King Bed

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

Highlights

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

Mansion Room #202 - Ocean View - Adults Only

Highlights

Balcony
Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
  • 28 sq m
  • Ocean view
  • Sleeps 2
  • 1 King Bed

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

Highlights

Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
  • 28 sq m
  • Ocean view
  • Sleeps 2
  • 1 King Bed

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
  • 65 sq m
  • Partial ocean view
  • Sleeps 4
  • 1 King Bed and 1 Queen Sofa Bed

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

Highlights

Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
Designer toiletries
  • 46 sq m
  • Partial ocean view
  • Sleeps 2
  • 1 King Bed

Bungalow #102 - Pool View - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
Designer toiletries
  • 37 sq m
  • Sleeps 4
  • 1 Queen Bed and 1 Double Sofa Bed

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

Highlights

Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
  • 28 sq m
  • Sleeps 4
  • 1 King Bed and 1 Double Sofa Bed

Mansion Room #303 - Courtyard View - Adults Only

Highlights

Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
Designer toiletries
  • 46 sq m
  • City view
  • Sleeps 4
  • 2 Queen Beds

Lopez House #109 - Courtyard View - Adults Only

Highlights

Balcony or patio
Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
  • 46 sq m
  • Sleeps 2
  • 1 Queen Bed

Lopez House #205 - Partial Ocean View - Adults Only

Highlights

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

Lopez House #206 - Partial Ocean View - Adults Only

Highlights

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

Lopez House #207 - Courtyard View - Adults Only

Highlights

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

Bungalow #103 - Pool View - Adults Only

Highlights

Separate sitting area
Individually furnished
Air conditioning
HDTV
Pillow-top bed
Premium bedding
Private bathroom
Hairdryer
  • 28 sq m
  • Sleeps 2
  • 1 Queen Bed

About the area

Key West

The Mansion on the Sea - Southernmost House in the USA puts you in the heart of Key West, within steps of Key West Butterfly and Nature Conservatory and South Beach. Highlights at this beach hotel include a restaurant, an outdoor swimming pool and free continental breakfast. .The café, Seaside Cafe at Mansion, is open for lunch and dinner. The hotel's own lounge bar and poolside bar are nice places to enjoy a drink. Added amenities include free Wi-Fi in public areas, a snack bar/deli and coffee/tea in a common area. Each morning free breakfast is served. There's also the convenience of self parking. .Places within a short walk of this 4-property class Old Town Key West hotel include Southernmost Point and Duval Street.

What's nearby

  • Duval Street - 1 min walk - 0.0 km
  • South Beach - 1 min walk - 0.0 km
  • Southernmost Point - 2 min walk - 0.2 km
  • Ernest Hemingway Home and Museum - 8 min walk - 0.7 km
  • Mallory Square - 4 min drive - 1.7 km

Getting around

  • Key West, FL (EYW-Key West Intl.) - 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

Adults-only beach hotel with outdoor pool
There's a restaurant on site, as well as a snack bar/deli. You can enjoy a drink at one of the bars, which include a poolside bar and a bar/lounge. Free breakfast is available daily. WiFi is free in public spaces.

An outdoor pool, a terrace, and multilingual staff are also featured at The Mansion on the Sea - Southernmost House in the USA. Parking is available for a fee.

Smoking is allowed in designated areas at this Victorian Key West hotel.

  • 18 guestrooms or units
  • 3 levels
  • 3 buildings
  • Built in 1897
  • Continental breakfast (free)
  • Deli
  • Beach lounge chairs
  • Towels for the beach
  • Poolside lounge chairs
  • Umbrellas for the pool
  • Coffee in lobby
  • Front desk (limited hours)
  • Staff members are multilingual
  • Storage area for luggage
  • Front desk safe
  • Tour and ticket information
  • Concierge
  • Wedding services available
  • Terrace
  • Garden
  • Outdoor picnic space
  • Gift shop
  • Newspapers in lobby (free)
  • Television in lobby
  • On-site shopping
  • Bellhop
  • Smoking in designated areas
  • Bar or lounge
  • Bar by the pool
  • Dining venue
The Mansion on the Sea - Southernmost House in the USA offers 18 air-conditioned accommodations with free newspapers and coffee/tea makers. Each accommodation is individually furnished. Pillowtop beds feature premium bedding. 42-inch flat-screen televisions come with premium cable channels.

Bathrooms include a shower, designer toiletries, complimentary toiletries and hairdryers. This Key West hotel provides complimentary wireless Internet access, with a speed of 500+ Mbps (good for 6+ people or 10+ devices). Housekeeping is provided on a daily basis.

Languages

English, French, Russian, Spanish

Similar properties

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 transport

  • Parking on site (USD 25 per night)

Food and drink

  • Free continental breakfast available daily 8 AM to 10 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 and check-out are available
Late check-in subject to availability
Minimum check-in age - 18

Check-out

Check-out before 11 AM
Contactless check-out

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

  • No pets allowed

Children and extra beds

  • Children younger than 18 are not allowed at this adults-only property. All guests 18 and older are welcome.
  • Cots (infant beds) are not available.

Payment types

Important information

Fees

Guests will be asked to pay the following charges at the property:

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

We've listed all charges provided to us by the property.

Optional extras

The fees and deposits listed below will be charged at the time of service, check-in, or check-out.

  • Self-parking fee: USD 25 per night

This may not be a comprehensive list. Fees and deposits are subject to change and might not include tax.

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 and terraces, which may not be suitable for children; if you have any concerns, we recommend contacting the property prior to your arrival to confirm that they can accommodate you in a suitable room
Charges for extra guests may apply and vary according to property policy.
A cash deposit, credit card or debit card for incidental charges and government-issued photo identification may be required upon check-in.
Special requests are subject to availability at the time of check-in. Special requests can't be guaranteed and may incur additional charges.
    This property is managed by a professional host. The provision of housing is linked to their trade, business or profession. This property has outdoor spaces, such as balconies, patios and terraces, which may not be suitable for children. If you have any concerns, we recommend contacting the property prior to your arrival to confirm that they can accommodate you in a suitable room. Minimum Spring Break check-in age is 24 years old. This property accepts Visa, Mastercard, American Express and Discover. Cash is not accepted. Noise-free guestrooms cannot be guaranteed. For guests' safety, the property includes a carbon monoxide detector, a fire extinguisher and a smoke detector in all accommodation.

We should mention

  • This is an adults-only property and children 18 years old and younger aren't allowed.
  • Registered guests are the only ones allowed to be in 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

Is parking available at The Mansion on the Sea - Southernmost House in the USA?

Yep, The Mansion on the Sea - Southernmost House in the USA has a self car park for USD 25 per night.

How much does it cost to stay at The Mansion on the Sea - Southernmost House in the USA?

As of 16 June 2025, prices found for a 1-night stay for 2 adults at The Mansion on the Sea - Southernmost House in the USA on 18 June 2025 start from AU$345.10, including taxes and fees. This price is based on the lowest nightly price found in the last 24 hours for stays in the next 30 days. Prices are subject to change. Choose your dates for more accurate prices.

Are there any beaches close to The Mansion on the Sea - Southernmost House in the USA?

Yep, The Mansion on the Sea - Southernmost House in the USA is a short 1-minute walk from Florida Keys Beaches. Fun beach activities include snorkelling, scuba diving and waterskiing. You can also find boat tours.

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

The Mansion on the Sea - Southernmost House in the USA has an outdoor pool. Grab your bathers and lounge poolside while enjoying under the shade of an umbrella and with a coldie from the bar.

What makes The Mansion on the Sea - Southernmost House in the USA a romantic place to stay?

Ocean-view dining and a champagne service, as well as pillowtop beds in the guestrooms, all help set the scene for a romantic weekend at The Mansion on the Sea - Southernmost House in the USA.

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

No, The Mansion on the Sea - Southernmost House in the USA is an adults-only property.

Does The Mansion on the Sea - Southernmost House in the USA serve breakfast?

You bet, free continental brekkie is on offer daily between 8 AM and 10 AM.

Is there a free airport shuttle available at The Mansion on the Sea - Southernmost House in the USA?

No, The Mansion on the Sea - Southernmost House in the USA does not offer an airport shuttle service.

Is there a bar or restaurant at The Mansion on the Sea - Southernmost House in the USA?

Yep, they've got a lounge bar and an onsite restaurant that serves lunch and dinner.

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

Check-in begins at 4 PM. Check-out time is 11 AM.

Are pets allowed at The Mansion on the Sea - Southernmost House in the USA?

No, pets are not allowed.

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

Reviews

9.4

Exceptional

Rating 10 - Excellent. 749 out of 1005 reviews
Rating 8 - Good. 165 out of 1005 reviews
Rating 6 - Okay. 59 out of 1005 reviews
Rating 4 - Poor. 21 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

8/10 Good

Maria

Liked: Staff & service, room comfort

Overpriced for what you get

Stayed for one night there and it was ok, room is nice enough, bed is comfortable but bathroom was a bit tired. It's a good hotel but not for £600 a night, I think the price is based on history of the hotel rather than quality of stay you get.
Stayed 1 night in Feb 2025

10/10 Excellent

Jim

Liked: Staff & service
Stayed 2 nights in Mar 2025

10/10 Excellent

Susan L

Travelled with partner
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

6/10 Okay

joseph

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

10/10 Excellent

Beth

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

Can't wait to return

Loved every part of our stay at the quaint Hotel. We had a door that led to the pool, so nice. Perfect get away.
Stayed 3 nights in Feb 2025

10/10 Excellent

Rhea

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 3 nights in Feb 2025

10/10 Excellent

richard

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
First time staying here and we loved it! Definitely returning next year ! Entire staff and general manager Nina are super friendly and accommodating . This is an old historical mansion with wonderful views of the ocean and in a great location !
Stayed 4 nights in Feb 2025

10/10 Excellent

Matthew

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Great
Stayed 1 night in Mar 2025

6/10 Okay

Neil

Travelled with partner
Liked: Staff & service, amenities
Disliked: Property conditions & facilities
Two historic (previously) homes with rooms that have been turned into sleeping/convenience suites. Not a modernized hotel experience if that is what yo are seeking. Very antiqueish, unique, and rustic and right on the oceanside - however there is no beach area for this hotel. Buildings and rooms retain an authentic old-style appearance but look to have been remodeled some time ago and are in need of basic or new repairs & maintenance - everything inside and outside, as well as the garden grounds, seem a bit shabby, neglected, and not getting the regular "professional" care that such a place deserves - shameful. Parking is good. Continental breakfast is good. Staff is friendly. Location is excellent and very convenient for walking, biking, and commuting everywhere in Key West, Duval St., and oceanside areas. Many bars, shops, and other "adult" related entertainments nearby but the Key West area is kind of sleazy and very touristy focused - not the best area for bringing kids or for those who do not care to drink and party.

10/10 Excellent

Nicholas V

Stayed 3 nights in Feb 2025

10/10 Excellent

Kelli

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 2 nights in Jan 2025

10/10 Excellent

Katherine

Travelled with partner
Liked: Staff & service, property conditions & facilities
Staff were excellent! Room was clean!! Didn’t like the 3rd floor walk up!!
Stayed 3 nights in Feb 2025

10/10 Excellent

Paul

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 3 nights in Feb 2025

10/10 Excellent

Ami

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The staff was very friendly and helpful. The room was delightful and very clean. Breakfast was very good. We loved spending time on the balcony and at the heated pool. We loved having the resort feel with no crowd.
Stayed 5 nights in Feb 2025

10/10 Excellent

Kathleen

Liked: Cleanliness, staff & service, property conditions & facilities
I could walk out to pool and get a chair at the pool, always available.
Stayed 4 nights in Feb 2025

10/10 Excellent

Steve

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 3 nights in Feb 2025

10/10 Excellent

Jim

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Great pool. Ocean views.
Stayed 4 nights in Feb 2025

10/10 Excellent

Andrew

Travelled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Perfect get away
Stayed 1 night in Feb 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

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

Ellen

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 1 night in Feb 2025

10/10 Excellent

Gerald

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

Great and Relaxing week at the Mansion

Everything about the Mansion was very good. The staff was friendly and very professional. The breakfast was very nice and met all of our needs. Our room was clean and service was very efficient. The grounds were a pleasure to explore and use, especially the pool which provided a view of the ocean. Thank you
Stayed 5 nights in Feb 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

8/10 Good

Ronald

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The property was wonderful. My only issue was we stayed in room 106 which was right next ro their common bathroom which had a lot of traffic and noise.
Stayed 5 nights in Jan 2025

8/10 Good

Brian, Broomfield

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 2 nights in Jan 2025