How subletting works in Denmark

What is fremleje (subletting)?

Fremleje is the Danish term for subletting. It means temporarily renting out your room to another person while you're away — for example, during an exchange semester, internship abroad, or summer vacation.

Legal framework

Subletting is governed by the Danish Rent Act (Lejeloven §157-158):

• Full subletting is allowed for up to 2 years
• You cannot charge more than your own rent (overcharging is called “overleje” and is illegal)
• A written subletting contract is mandatory
• Your landlord must be informed in advance

Kollegium-specific rules

Most Copenhagen dorms have additional rules:

• You must have lived there for at least 6 months before subletting
• Maximum sublet period: typically 3–6 months
• The subtenant must be a full-time student
• Admin approval is required — always get written permission before the sublet begins
• Deposit is capped at one month's rent
• Airbnb-style short-term subletting is prohibited

For subleasers (posting your room)

1. Find your subtenant (that's what KollegieSwap is for)
2. Get a subletting contract from your dorm administration
3. Submit the signed contract + subtenant's student documentation to your admin
4. Wait for written approval before the sublet begins

For seekers (looking for a room)

• Make sure you're enrolled as a full-time student (you'll need proof)
• If you're international, you'll need a valid residence permit
• Never pay before seeing the room or signing a contract
• Always use bank transfer (never Western Union, cash, or crypto)
• Verify the subleaser actually lives there — check at boligejer.dk

Avoiding scams

• If the price seems too good to be true, it probably is
• Never pay a deposit before viewing the room and signing a contract
• Be wary of landlords who can't meet in person
• On KollegieSwap, all users are verified students — but always exercise caution