The bebyggelsesprocent (site coverage ratio) is a Danish planning term that expresses how much of your total plot area can be built on — including all buildings on the plot. It’s one of the most important rules when planning extensions, garages or outbuildings.
Why does it matter to you?
If you want to build a garage, extend your house or add a garden room, the bebyggelsesprocent sets the ceiling. If you’re already at or near the limit, you may not be allowed to build more — regardless of whether there’s space on the plot.
Typical limits in Danish residential areas:
- Single-family homes: 25–30%
- Terraced and semi-detached houses: 40%
- Summer cottages: 15%
These figures come from either the national building regulations (BR18) or local development plans (lokalplaner), whichever is more restrictive.
How is it calculated?
Site coverage = (total built area / total plot area) × 100
All buildings count: the main house, garage, outbuildings, shed, greenhouse — any permanently roofed structure. Terraces, patios and driveways typically don’t count.
Example: A 120 m² house + 30 m² garage on a 600 m² plot = 25% coverage.
Frequently asked questions
What happens if I exceed the site coverage ratio?
Building without permission — or in violation of the bebyggelsesprocent — can result in an enforcement order requiring you to demolish what you’ve built, at your own expense.
Do outbuildings and garages count?
Yes. All permanently roofed structures on the plot count towards the bebyggelsesprocent.
Where can I find the limit for my property?
Check your lokalplan at plandata.dk or contact your municipality’s planning department. The BR18 defaults also apply where no lokalplan exists.