A building permit is formal approval from your municipality confirming that your construction project complies with applicable rules — primarily the national building code BR18 and any local development plan. Many projects require a permit, but some smaller works require only notification or are exempt.
Why does it matter to you?
Building without the required permit risks an enforcement order requiring you to demolish what you’ve built — at your own expense. It can also create problems when selling, taking out a mortgage or making insurance claims.
What requires a building permit:
- New buildings (house, garage, carport over 50 m²)
- Extensions (depending on size and type)
- Structural alterations
- Change of use (e.g. warehouse to residential)
What typically requires notification only:
- Carports and small outbuildings under 50 m²
- Certain facade changes
- Window and roof replacements
How to apply
You apply for a building permit through Denmark’s national building-permit portal at bygogmiljoe.dk — the shared digital platform for all Danish municipalities. You’ll need to submit a site plan, floor plans and elevation drawings.
Processing time varies from 4 weeks to 6+ months depending on project complexity and the municipality’s capacity.
Once granted, you typically have 1 year to start construction and 5 years to complete it.
Frequently asked questions
How much does a building permit cost?
Municipalities charge a fee based on building size and type. Typically DKK 2,000–20,000 for a single-family home.
What’s the difference between a permit and a notification?
A notification applies to smaller projects such as carports and outbuildings under 50 m². It’s a simplified process — you notify the municipality rather than seeking full approval.
Can I apply myself?
Yes. You don’t need to hire a professional for the application itself, but for complex projects an architect or engineer is recommended to prepare the required drawings and documentation.
What happens if I do not get a permit?
The municipality can issue an enforcement order requiring the building work to be made legal — or removed. Depending on the case, you may be able to appeal to the relevant Danish complaints board.