
A room you will want to stay in.
Plenty of space, a private bathroom and free Wi-Fi. Find the room type and bed setup that suit you in the booking portal.
Book your stay
SØNDERBORG · RIGHT BY ALSSUND
Wake up by the water. Stay in the historic barracks, with space to unwind, self-service arrival and the town on your doorstep.
Missing your access code?
A STAY BY THE WATERYOUR NEXT STAY
Your dates and the number of adults and children aged 3+ are sent to the booking portal in a new window. Children aged 0–2 and extra beds are selected in the portal. Choose a room and read the price and cancellation terms. Nothing has been booked yet.
PLENTY OF SPACE. A GREAT LOCATION.
Retreat after a day in town. There is room for a slow morning or a working day away from home.
Find your stay
Plenty of space, a private bathroom and free Wi-Fi. Find the room type and bed setup that suit you in the booking portal.

A break with a book. A cup of coffee. Many rooms have a balcony; check the facilities of your selected room type in the booking portal.
The images above show examples of the hotel's rooms and shared lounge. They do not show every room type; layout, view, balcony and beds depend on the selected category.
Swipe sideways in the table to see all the details.
| Room type | Beds | Features | Max. guests |
|---|---|---|---|
Double Room Balcony | Check the bed setup in the category | Bright double room with a private balcony. Selected rooms have a view. | 4 |
Double Suite Disability | Double bed | Spacious suite with an accessible layout. | 4 |
Twin Bed Suite Disability | 2 separate beds | Suite with an accessible layout. | 4 |
Twin Room Balcony | Check the bed setup in the category | Bright twin room with a private balcony. | 4 |
Deluxe Suite | Check the bed setup in the category | Spacious deluxe suite with extra room. | 4 |
The images in the table are examples from the category galleries in the booking portal. Layout and facilities may vary.
Include every guest, including children. Check beds, extra beds and facilities in your selected category. The hotel has no guest lift. Have any essential access requirements confirmed before booking.
CORPORATE RATES · LONGER STAYS
We offer special rates for companies using the hotel over longer periods. Email us to explore the options for your stays.
SALEN · MEETINGS & CELEBRATIONS
Bring colleagues or family together in SALEN beside the hotel. A setting for meetings, conferences and private celebrations. Combine your event with an overnight stay by arrangement.
GOOD TO KNOW BEFORE YOU ARRIVE
Find the essentials for your stay here. Your arrival email, personal guestbook and booking confirmation contain the details for your own reservation.
01 / ARRIVAL
We are a self-service hotel without a traditional staffed reception. Your arrival and access information has been emailed to you. Have it ready when you arrive.
Unless different times have been confirmed for your booking.
We have sent you the arrival and access instructions. Check spam and junk mail too if you cannot find the email.
Use the link in your arrival email and follow the instructions. If you cannot find the email when you arrive, scan the QR code on the check-in screen in reception.
Your code only works from the agreed time, even if you receive it earlier. Arriving late? Make sure you have your access information ready in advance.
See the route to the hotel and the entrance. Use your arrival email for your personal check-in and access.
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02 / BREAKFAST IN SALENA GOOD START TO THE DAY
Breakfast is served in SALEN, in the building beside the hotel. It is normally included; check your selected rate and booking confirmation.
If you have allergies or special dietary requirements, email us well in advance. Special requests must be confirmed before you can rely on them.
Breakfast questions03 / PARKING
There are several parking options by the hotel. On the hotel's grounds, you must register your number plate using the link in your arrival email. Check the permit and signs before leaving your car. Never park on the fire access road in front of the hotel.
MAP & STEP-BY-STEP HELP
See the difference between hotel parking, municipal spaces at Kasernen and other car parks. Find out how to check the area, number plate, period and permit.
Booked direct but being asked to pay? Contact us before paying for parking again. If you have already paid, find your add-on under “Services og tilvalg” (Services and add-ons) in the guestbook.
*Free parking with a direct booking requires a confirmed permit for the correct vehicle and period. Follow your reservation information and the signs. Electric car charging is available and paid for separately from parking. Follow the instructions and terms at the charger.
04 / BRING YOUR BIKE TO SØNDERBORG
A ride by the water. A whole day on the road. Bring your bike and enjoy a great base for your stay in Sønderborg.
Our locked bicycle room is a separate add-on at DKK 100 per bicycle per stay. Book no later than the day before arrival and include your booking number and number of bicycles. We will confirm your booking and send access instructions.
Book bicycle parking by emailBicycles may not be brought inside the hotel or into the rooms. Use the separate bicycle room after your add-on has been confirmed. If you need to charge an e-bike, email before your stay to ask about the options.
Email no later than the day before arrival with your dates, booking number and number of bicycles.
The price is DKK 100 per bicycle per stay. Wait for our booking confirmation.
Make sure you know the location and how to get access before arrival.
05 / EXPERIENCE SØNDERBORG
Make the hotel your base. Find time for the water, the history and a break that lasts a little longer.
SØNDERBORG'S WATERFRONTFancy a spa visit during your stay? Explore a SpaDay at Alsik. You book and pay directly with Alsik, subject to their prices and availability.
SpaDaySee the current options at Alsik
Before you bookCheck age limits and terms
The spa is at Alsik and is not included in your hotel stay. The image shows the waterfront and Alsik from outside.
HISTORY AND LANDSCAPE
Head into the landscape at Dybbøl Banke and discover the area's history.
Read about Dybbøl BankeALSSUND AND THE COAST
Start at the hotel and follow the waterfront and Strandpromenaden towards Sønderborg Marina. Continue along Gendarmstien through Sønderskoven towards Høruphav, or choose a shorter walk along Alssund. A longer walk towards Flensburg along the fjord goes in the other direction; plan it as a separate trip with stages and transport home.
See the route towards HøruphavFOR EARLY RISERS
Start the day by Alssund with a visit to Sønderborg Havnebad. Check current opening hours, access rules and day-ticket or membership options before setting off.
Plan your visit to the harbour bathPEACE AND QUIET
Visit Biblioteket Sønderborg in Multikulturhuset in our neighbourhood. Find a newspaper, a place to read or a quiet moment to yourself. Check opening hours and access on the library's website.
Visit the library's websiteHISTORY CLOSE BY
Make time for a museum visit during your stay. Find exhibitions, opening hours and tickets on the museum's website.
Visit the castle's websiteA DAY ON TWO WHEELS
If you have not brought your own, contact Fri BikeShop in Sønderborg to ask about the options. Rental and availability must be arranged directly.
Contact the local bike shopPLAY AND SCIENCE
Take the family to Universe in Nordborg, where activities and play meet science and technology. Check the season, opening hours and tickets before your trip.
Plan a day at UniverseMUSIC AND PERFORMANCE
Make time for a concert at Koncertsalen Alsion. Find the current programme, tickets and practical information directly from the concert hall.
See the programme at AlsionPALACE AND GARDEN
Stroll through Gråsten Palace Garden among flowers, trees and views across the landscape. The garden may be closed during royal visits; check current access before your trip.
Check access to the palace gardenWITHIN EASY REACH
Fly to Sønderborg and stay close to the town, Alssund and local experiences. Check current routes, flight status and onward transport options on the airport’s website.
Plan your journey via Sønderborg AirportPlan your trip around each venue's current opening hours, access conditions and terms. Any tickets, rentals and other extras are paid for separately from your hotel stay.
ANSWERS YOU CAN USE
Find practical help before and during your stay. The hotel can help with your personal access, payment or reservation when an answer requires us to check your booking.
For help from the hotel, email info@hotelsonderborgkaserne.dk.
Email the hotelYou can normally enter from 15:00 and must check out by 10:00. Your access code follows these times. Earlier check-in or later check-out are add-ons requiring confirmation and are subject to availability. Check the time and price in your guestbook before ordering.
Your arrival and access information has been emailed to you. Check your inbox, spam and junk mail.
On arrival, you can scan the QR code on the check-in screen in reception if you cannot find the email. If you still need help, email info@hotelsonderborgkaserne.dk with your name, booking number, stay dates and a brief description. If you booked through a booking portal, write from your own email address.
The hotel has self-service access. Find the arrival email we sent, complete check-in and have your access instructions ready before travelling here. Check spam if the email is missing. On arrival, you can scan the QR code on the check-in screen in reception.
Email us in advance if you need help. There is no traditional staffed reception.
When you book directly on the hotel's website, parking on the hotel's grounds is free once the permit is confirmed for your vehicle and stay. Open the link in your arrival email, select parking and register your number plate. Check the area, vehicle and period.
For other bookings, premium parking costs DKK 50 per day and must be ordered and paid for. A registered number plate is not by itself a confirmed permit or paid parking. There is also free public parking by the hotel; follow the signs for the area. Never park on the fire access road in front of the hotel.
If you cannot register or correct your number plate, or will only know it when collecting a hire car, contact the hotel for help. Check the confirmation and the parking area. Do not assume registration is complete if you receive an error message.
Yes, electric car charging is available. Follow the instructions at the charger for use, prices and payment. Charging is paid for separately from parking, so check your parking permit and the signs for the area too.
Breakfast is normally included unless your reservation says otherwise. It is served in SALEN in the neighbouring building: weekdays 06:00–10:00 and weekends/public holidays 07:30–10:00.
Follow the instructions in your guestbook if you need to select a breakfast time. Any agreed special arrangement applies only to the specific reservation. Contact us if a link does not work or you would like to ask about extra breakfast guests.
Email us well before arrival so we can discuss the options. Special dietary arrangements or products can only be considered agreed once we have confirmed them in writing.
Children aged 0–2 can normally share their parents’ bed free of charge, where the selected room allows this. Always enter every guest and child in the booking portal and choose a category with enough capacity. Extra beds and baby cots must be arranged in advance; a sofa in a photograph is not itself an additional booked sleeping place. Email us if you are unsure about room choice or capacity.
The hotel has no guest lift. If you need step-free access, you must book an accessible room. Have the necessary access and bathroom arrangements confirmed by the hotel before booking.
Many rooms have a balcony, but facilities vary. Read the description of your selected category in the booking portal. A request in the comments field is not a confirmed room type.
No. Animals are not permitted in the hotel or rooms. This includes small dogs.
Payment, changes and cancellation depend on the rate and terms you selected. Read them in the booking portal before booking and in your booking confirmation. Free cancellation does not apply to every booking.
Booked directly on the hotel's website? Email info@hotelsonderborgkaserne.dk with your name, booking number, stay dates and the change or cancellation you would like. We will check the options under your booking terms and reply in writing. Sending a request is not a confirmed change or a promise of a refund.
Booked through another booking portal? Send your request through the channel you booked with and follow its terms and options for changes. See also the hotel's terms and conditions.
Online check-in may include identification and a card guarantee. A card guarantee and payment for your stay are different things. Follow the explanation in the secure check-in process and your reservation.
Never send card details in an ordinary email, chat or text message. Contact the hotel if you are unsure about a message or payment link.
When booking for someone else, both the booker and the staying guest must have correct contact details. Use the guest's direct email address and mobile number with country code for access information.
Provide the company and invoice recipient separately, along with any reference. The company's invoicing email must not replace the guest's contact email.
We offer special rates for companies using the hotel over longer periods. Email info@hotelsonderborgkaserne.dk to ask about the options, including your company, preferred dates, number of rooms and guests, and whether the stays will be recurring. See corporate rates.
Email us with your stay dates, booking number and a description of the missing item. We can check whether it has been found and agree the next steps with you.
Yes. The hotel's locked bicycle room is a separate add-on at DKK 100 per bicycle per stay. Book no later than the day before arrival by emailing info@hotelsonderborgkaserne.dk, and include your booking number, stay dates and number of bicycles. Wait for confirmation and access instructions.
Bicycles may not be brought inside the hotel or into the rooms. If you need to charge an e-bike, email before your stay to ask about the options.
If you need to charge an e-bike, email info@hotelsonderborgkaserne.dk before your stay to ask about the options. Please mention whether the battery can be removed from the bike. Bicycles may not be brought inside the hotel or into the rooms.
We do not have standard luggage storage at a staffed reception. Contact us in advance about a possible arrangement involving paid access to the bicycle room. Availability, duration and price must be agreed and confirmed before you leave your luggage.
There are no kettles in the rooms. You can get hot water from the hotel's shared kitchen. Find the location in your guestbook, or contact us if you cannot find it.
The hotel has irons and ironing boards in shared ironing rooms. Follow the instructions in your guestbook, or contact us to find the room on your floor.
Hang the housekeeping sign outside before 07:00, and your room will be refreshed.
You can explore a SpaDay at Alsik in Sønderborg. The spa is operated by Alsik and is not included in your stay with us. Booking and payment are made directly with Alsik.
See Alsik's current age limits, prices, availability and terms, before you book.
If you would like to hire a bike during your stay, contact Fri BikeShop in Sønderborg and ask about the options. Rental, price and availability must be agreed directly with the provider.
The hotel's address is Gerlachsgade 8, 6400 Sønderborg. Use Rejseplanen for current connections and the walking route from your stop.
For a taxi, give the hotel's name and address. Follow the signs for pick-up and drop-off. Contact us if you have specific access requirements; transport is not included in your stay.
Arriving by air? Check current routes, flight status and transport options at Sønderborg Airport. Plan your onward journey to the hotel before arrival.
Yes. SALEN is beside the hotel and can be used for meetings, conferences and private celebrations. It has a stage, AV equipment, projector, microphones, blackout facilities, a serving kitchen, bar and terrace. Events can be combined with overnight stays by arrangement.
Email SALEN@sonderborgkaserne.dk with the date and times, number of attendees, preferred room layout, equipment, catering and any room requirements and overnight dates. The venue, services and price are set out in a specific quote and require a confirmed agreement. See SALEN and send an enquiry.
In Sønderborg, options include Torve-Hallen with Italian café and restaurant food, and Restaurant Flammen with a grill buffet. Check current information and reserve a table directly with the restaurants.
The hotel's breakfast is served in SALEN. Meals at the restaurants are separate from your hotel stay. Torve-Hallen is moving in 2027; check the restaurant's website for its current location and opening hours.
Walk along Alssund and the waterfront, visit Dybbøl Banke or explore the exhibitions at Sønderborg Castle.
From the hotel, follow the waterfront and Strandpromenaden towards the marina and continue along Gendarmstien through Sønderskoven towards Høruphav. Check route maps and conditions, and choose a walk that suits you.
Early risers can explore Sønderborg Havnebad. For peace, reading and quiet reflection, visit Biblioteket Sønderborg in Multikulturhuset in the neighbourhood. Check current opening hours, access rules and any tickets with each venue.
Check your inbox and spam folder. If the confirmation is still missing, contact us with your name, stay dates and booking number if you have one, before booking again. We will check whether your booking was completed.
Open the link from your arrival email directly in Chrome or Safari, and try mobile data if needed. On arrival, you can also use the QR code on the check-in screen in reception.
If you still need help, email info@hotelsonderborgkaserne.dk with your booking number, the time and a screenshot of the error without any card details. If you are arriving late, it is a good idea to resolve the problem in writing before travelling here.
Contact us before continuing. Provide your booking number and stay dates so we can check the reservation and help you reach the correct check-in. Do not change information on a reservation you do not recognise.
Open the parking link in your arrival email. Register your number plate and check the parking product, period and confirmation. Also look under “Services og tilvalg” (Services and add-ons) in your digital guestbook. An entered number plate is not by itself a confirmed parking permit.
If payment is declined or your hotel parking permit is missing, email us before purchasing again. Until it is resolved, use a space where the signs allow you to park. Never park on the fire access road in front of the hotel. See the parking guide's checklist.
Hotel parking is registered using the link in your arrival email. Always check that you have a confirmed permit for the correct vehicle, period and parking area.
If you use EasyPark, OK or another third-party app, questions about the app, registration or payment must go directly to the provider's support. The hotel does not provide support for these apps. Check that the app's zone and time match the signs where your car is parked. An app payment is not by itself a hotel parking permit.
Questions and appeals about a parking charge must go directly to the issuer. Follow the contact and appeals instructions on the notice and observe the stated deadlines.
The hotel does not handle appeals against parking charges. Send your appeal and any evidence requested directly to the issuer.
There is one large bath towel per guest. Small towels and a bath mat are not included in the standard package. Extra towels can be purchased. Contact us to order and ask about the price.
Email info@hotelsonderborgkaserne.dk during your stay so we can investigate the problem. Include your name, booking number, room, what is happening and when it started. A photo or the exact error message can help.
For access problems, first find the arrival email we sent and check spam. On arrival, you can use the QR code on the check-in screen in reception. If you still need help, describe the access problem in your email.
Yes, the hotel has free Wi-Fi for guests. If you have a connection problem, email info@hotelsonderborgkaserne.dk. Include your room, the network you selected, what the error says and whether it affects more than one device.
Rooms, balconies, entrances and common areas are smoke-free. This includes e-cigarettes and vapes. Only smoke in an area expressly designated by the hotel.
Please be particularly considerate of other guests and neighbours from 22:00–07:00. Parties and noisy behaviour are not allowed. See also the hotel's house rules and terms.
If you need a packed lunch, contact us before your stay about availability, price and collection. You can rely on the arrangement once it has been confirmed for your reservation.
Email us before arrival if you are bringing a trailer, bus, lorry or larger vehicle so we can clarify space and terms. Additional vehicles and number plates may require separate registration.
Follow the signs at accessible spaces. A disabled parking permit does not automatically provide a hotel parking permit for every private space. Ask the hotel for guidance if you need a space close to the entrance. Never park on the fire access road in front of the hotel.
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WE ARE HAPPY TO HELP
A question before booking?
Or need help with your stay?
EMAIL US
info@hotelsonderborgkaserne.dkHotel Sønderborg KaserneFor questions about an existing reservation, email your name, booking number, stay dates and what you need help with. For problems during your stay, please include your room number too.
THE TOWN, THE WATER AND TIME FOR YOU