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The Mansion on the Sea

1400 Duval Street, Key West, FL 33040-3133
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Traveler (1158)
360
Panoramas (7)
Room & Suite (364)
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About

#10 of 55 hotels in Key West
Location
4.8
Cleanliness
4.6
Service
4.6
Value
4.2
Travelers' Choice
The Mansion on the Sea, formerly known as the Southernmost House, officially changed it's name on July 1, 2023. We are an historic, oceanfront property located at 1400 Duval Street, in Key West, Florida, and remain the Southernmost House in the continental United States. Operating since 2006 as an 18 room guesthouse, we offer 9 rooms in the Main house, 3 bungalows, a cottage and 4 rooms and full size apartment in the Lopez House, directly across the Pocket Park from the Mansion. Preserved to retain our original history, but updated to provide our guests with all the modern conveniences you'd expect to find in the most luxurious hotels available in an island paradise such as Key West, we are The Mansion on the Sea. We are an all-adult guesthouse, and require all hotel guests to be at least 18 years of age. Our front desk is available to take reservations 7 days a week from 8:00 a.m. until 10:00 p.m.
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Property amenities
Paid private parking on-site
Free High Speed Internet (WiFi)
Pool
Free breakfast
Boating
Snorkeling
Taxi service
Adults only
Secured parking
Wifi
Pool / beach towels
Infinity pool
Pool with view
Outdoor pool
Heated pool
Fence around pool
Poolside bar
Breakfast available
Complimentary tea
Outdoor dining area
Canoeing offsite
Patio
24-hour security
Baggage storage
Concierge
Gift shop
Newspaper
Non-smoking hotel
Outdoor furniture
Sun loungers / beach chairs
Sun terrace
Sun umbrellas
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Room features
Air conditioning
Housekeeping
Interconnected rooms available
Private balcony
Coffee / tea maker
Refrigerator
Cable / satellite TV
Complimentary toiletries
Safe
Wardrobe / closet
Bottled water
Iron
Private bathrooms
Wake-up service / alarm clock
Flatscreen TV
Hair dryer
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Room types
Ocean view
Pool view
Bridal suite
Non-smoking rooms
Suites
Good to know
HOTEL CLASS
HOTEL STYLE
Value
Ocean View
Languages Spoken
English, Russian, Spanish, Ukrainian
1391Reviews60Q+A100Room tips
Traveler rating
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C C wrote a review Feb 15
16 contributions1 helpful vote
Stayed at the Mansion for a long fun weekend with friends. Felt at home from the moment we arrived thanks to Beth, Lorraine and Nina—great managers and a wonderful staff—thanks again for anniversary champagne! Rooms were spacious and beautifully maintained—history of the mansion is fascinating. You can eat lunch at the Seaside Cafe by the pool—as good as any restaurant near the harbor—don’t miss lobster biscuits! Pool was delightful, heated just for comfort. Was a great stay on the “quiet” end of Duval! Will be back!
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Date of stay: February 2024
Value
Location
Service
Trip type: Traveled as a couple
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
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schramuk J wrote a review Jan 2024
Marengo, Illinois8 contributions2 helpful votes
It's a perfect spot on the "less rowdy" south end of Duval Street. The service provided by Nina, Lorraine, and Beth was superb. The nearby sandy beach, casual restaurant, and access to site-seeing make this a great place to stay. Take account of the history of this hotel when you check in!
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Date of stay: January 2024Trip type: Traveled as a couple
Room Tip: Don't rent a vehicle
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This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
1 Helpful vote
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jenndup wrote a review Jan 2024
Cloquet, Minnesota45 contributions8 helpful votes
My husband and I stayed here in January and other than the weather it was wonderful. We stayed in cottage #104. Check in was smooth, the clerk was super helpful. Our room was spacious and clean. The bed was comfortable and we had our own little porch. Staff around the property were super friendly and helpful. The pool was great (closed one day due to high winds), and right on the water. Location was nice, less busy it seemed than the waterfront side of the island. It took us about 20 minutes to walk to the other end (1.2 miles). We did rent a golf cart right down the road for the last day. Plenty of options to eat in the area as well. Would definitely stay here again. The adult only property is very relaxing and quiet.
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Date of stay: January 2024Trip type: Traveled as a couple
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
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Christine R wrote a review Dec 2023
2 contributions3 helpful votes
I spent a week at the Mansion on the Sea and it was perfection. The house is absolutely gorgeous, and the experience was enhanced by the efficient, helpful and friendly staff. From the moment I checked in, I felt pampered. The front desk representatives went out of their way to make sure that I had everything I needed; the housekeeping staff kept my room spotless, and the pool and grounds were beautifully maintained. The Mansion itself is stunning. The house is gorgeous, and it was fun to learn about the history of the property from the front desk staff. You almost feel like you are stepping back in history to a different time. The pool area is spectacular on its own. There is a great deck right on the ocean where you can enjoy a beautiful view of the water, and the pool is heaven. The temperature was perfect, and I spent 3 out of my 7 days there swimming and relaxing by the pool. They have a fantastic bar right there, and the bartenders were fun to talk with (I highly recommend the Key Lime Pie Daiquiri!) The location really couldn't be any better. Being on the quiet end of Duval Street is perfect; you can walk to most anywhere you want to go, but you are out of the loud, busy area. There are fantastic restaurants and bars within easy walking distance and the food was great; for the best Cuban Sandwich on the island, be sure to check out Sandy's Food Truck that is parked right across the street from the Mansion. The Mansion also has it's own waterfront restaurant that served excellent food; it was so good that I'm going to write a separate review for that! My stay at the Mansion on the Sea was a wonderful experience, and I'll definitely be back!
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Date of stay: December 2023
Value
Location
Service
Trip type: Traveled solo
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
1 Helpful vote
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John wrote a review Nov 2023
3 contributions1 helpful vote
This was my first stay at Mansion on the Sea and I was duly impressed. The room was great, the pool was quiet and relaxing, and the nearby bars and restaurants fantastic. I usually book at the Southernmost, but this was by far a more intimate experience. Would book again for sure.
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Date of stay: November 2023
Value
Location
Service
Trip type: Traveled with friends
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
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Response from Nina Powers, General Manager at The Mansion on the Sea
Responded Jan 15, 2024
Dear L6468XMjohnm, Thank you for sharing your experience of your first stay with us. We love knowing that your room was great and your enjoyed the pool. We look forward to your next visit.
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This response is the subjective opinion of the management representative and not of Tripadvisor LLC.
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Madeline L wrote a review Oct 2023
1 contribution
+1
My husband and I stayed here for one evening to celebrate his birthday and absolutely loved it. Next time we’ll stay longer. The property and the history is cool and amazing (JFK, President Eisenhower and Al Capone all stayed there) too! The room was incredible and eel kept and the staff were all kind and attentive. After our evening out, we came back to find a bottle of champagne and orange juice to make mimosas for my husband‘s birthday. My husband is not big on birthdays, but he was really impressed and loved it. We will definitely stay again.
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Date of stay: October 2023Trip type: Traveled as a couple
Room Tip: Parking is right in front of the hotel and plenty for guests.
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This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
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Response from Nina Powers, General Manager at The Mansion on the Sea
Responded Jan 15, 2024
Dear Madeline L, Thank you for sharing your experience on Trip Advisor. We love when guests celebrate special occasions with us and we always try to make it "extra" special. We're happy to know you enjoyed the complimentary champagne/mimosas. We hope you will stay longer on your next visit.
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This response is the subjective opinion of the management representative and not of Tripadvisor LLC.
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Donald W wrote a review Oct 2023
3 contributions
The staff is the most friendly group of people you’ll meet in Key West and that’s saying something in Key West. Ruby was great, the drinks were on point. We were there for our honeymoon and they made us feel like part of the family. Would recommend this place for any occasion. Julia learned it was our honeymoon and gave us free key lime pie to celebrate. Wonderful place. Wonderful people. Would highly recommend to anyone who wants a good time.
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Date of stay: October 2023Trip type: Traveled as a couple
Room Tip: Staying here and seeing ocean every morning is so wonderful. Thumbs up to the pool area.
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This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
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Response from Nina Powers, General Manager at The Mansion on the Sea
Responded Jan 15, 2024
Dear Donald W, Thank you for sharing your experience at The Mansion on the Sea. We are so glad that you stayed with us during such a special occasion. And, it goes without saying, that there is no better place to celebrate than at our Seaside Cafe and Bar.Thank you for your compliments about the staff. We agree, they are the friendliest and best!
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This response is the subjective opinion of the management representative and not of Tripadvisor LLC.
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Sue S wrote a review Oct 2023
1 contribution1 helpful vote
If you haven't been to "The Mansion on the Sea" you haven't been to Key West. The best location, views, food, property, service and more. The owner himself will likely greet you and make you feel at home. Can't wait to go back. The lobster pizza and Key Lime Pie are not to be missed!
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Date of stay: October 2023
Value
Location
Service
Trip type: Traveled with friends
Room Tip: This is Key West at it's best!
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This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
1 Helpful vote
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Response from Nina Powers, General Manager at The Mansion on the Sea
Responded Jan 15, 2024
Dear O785WKsues, Thank you for your review of the The Mansion on the Sea, and sharing your experience here. We're glad to know you enjoyed the Seaside Cafe and that you had a chance to meet Michael. We hope you will visit again in the near future.
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This response is the subjective opinion of the management representative and not of Tripadvisor LLC.
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Andrea wrote a review Oct 2023
5 contributions
+1
The atmosphere was perfect by the sea. The colors and weather were fantastic. The staff were all incredible. We had the most unique experience here that I will never forget. We came here in the morning to see if we could get into the bed and breakfast and see this historical and amazing building. When we approached we realized we needed a key. We were bummed. We sat down in the bar area and had the most amazing key lime drink. My girlfriend and I ventured off to the bathroom through this narrow hall outside. Our mothers followed. I came out of the bathroom and there was a man standing at the top of the stairs and said "Thank you for coming to my restaurant today. I was driving here and God told me to come to the bathrooms and find 4 women." There were only 3 of us there at the time. He said his name was Michael and he was to take us on a personal tour of the hotel. Like how did he know there were 4 when there was only 3 of there and he had just arrived. Michael is the owner of this hotel and he took us on a fantastic tour. We agreed to come back for dinner and asked him to join us. We met back at 7 and had the lobster pizza (which I was very leery about) I am not kidding when I say this was the BEST PIZZA I have ever had in my life. Michaels son is the master mind behind the food and everything we had was out of this world. If you are in Key West and you do not stop here, it will be your biggest mistake. And the pina colada key lime pie was to die for. Thank you Michael for the best part of our trip!!! We will be back.
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Date of stay: October 2023
Value
Location
Service
Trip type: Traveled with family
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
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Response from Nina Powers, General Manager at The Mansion on the Sea
Responded Jan 15, 2024
Dear Andreaandjustin2369, We are so happy to hear that you met our owner, Michael, and that you enjoyed our property and all the great offerings of the Seaside Cafe and Bar at The Mansion on the Sea. Our lobby area is open to the public everyday from 10:00 a.m. to 9:00 p.m. and we have 18 beautiful rooms for booking anytime you'd like to stay with us. Thank you for sharing your experience.
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This response is the subjective opinion of the management representative and not of Tripadvisor LLC.
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Sandra K wrote a review Oct 2023
2 contributions
This was the most luxurious beautiful setting I've ever seen! The cafe by the sea in the back of the mansion on the beach was fantastic! You must try the lobster pizza, coconut shrimp, and especially the key lime pie. It is to die for. The owners are warm and friendly the service great and the view spectacular.
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Date of stay: October 2023
Value
Location
Service
Trip type: Traveled with friends
This review is the subjective opinion of a Tripadvisor member and not of Tripadvisor LLC. Tripadvisor performs checks on reviews as part of our industry-leading trust & safety standards. Read our transparency report to learn more.
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Response from Nina Powers, General Manager at The Mansion on the Sea
Responded Jan 15, 2024
Dear Passport164618, Thank you for your review of our property. We love knowing that you had a great experience and that you enjoyed so much about The Mansion on the Sea and the Seaside Cafe at the Mansion. We hope to see you again. We promise the same great service, spectacular view and fantastic food when you visit again. Sincerely...
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This response is the subjective opinion of the management representative and not of Tripadvisor LLC.
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PRICE RANGE
$566 - $746 (Based on Average Rates for a Standard Room)
ALSO KNOWN AS
southernmost house hotel key west
FORMERLY KNOWN AS
The Southernmost House
LOCATION
United StatesFloridaFlorida KeysKey West
NUMBER OF ROOMS
18
Prices are the average nightly price provided by our partners and may not include all taxes and fees. Taxes and fees that are shown are estimates only. Please see our partners for more details.
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THE MANSION ON THE SEA - Updated 2024 Prices & Hotel Reviews (Key West, FL)

Frequently Asked Questions about The Mansion on the Sea
Which popular attractions are close to The Mansion on the Sea?
Nearby attractions include Tipsy Rooster Liquor Store & Bar (0.1 miles), Alan S. Maltz Gallery (0.2 miles), and Key West Butterfly and Nature Conservatory (0.04 miles).
What are some of the property amenities at The Mansion on the Sea?
Some of the more popular amenities offered include free wifi, free breakfast, and a pool.
Which room amenities are available at The Mansion on the Sea?
Top room amenities include air conditioning, a flat screen TV, and a refrigerator.
What food & drink options are available at The Mansion on the Sea?
Guests can enjoy free breakfast, a poolside bar, and complimentary tea during their stay.
Is parking available at The Mansion on the Sea?
Yes, paid private parking on-site, secured parking, and street parking are available to guests.
What are some restaurants close to The Mansion on the Sea?
Conveniently located restaurants include Seaside Cafe at the Mansion, The Lobster Shack Key West, and La Grignote.
Are there opportunities to exercise at The Mansion on the Sea?
Yes, guests have access to a pool during their stay.
Is The Mansion on the Sea located near the city center?
Yes, it is 0.6 miles away from the center of Key West.
Which languages are spoken by the staff at The Mansion on the Sea?
The staff speaks multiple languages, including English, Spanish, Russian, and Ukrainian.
Are there any historical sites close to The Mansion on the Sea?
Many travelers enjoy visiting Truman Little White House (0.9 miles), Key West Garden Club (0.7 miles), and West Martello Tower (0.6 miles).
Does The Mansion on the Sea have any great views?
Yes, guests often enjoy the harbor view available here.