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Garden sauna in the canton of Basel-Landschaft: do you need a building permit?
Which rules apply to an outdoor sauna in the canton of Basel-Landschaft, which sizes are possible without a permit and how to proceed.
Updated: September 2026 · independent guide, sources linked
In short
Usually yes. The exemption only covers very small outbuildings such as tool or garden sheds – a sauna practically never meets these conditions.
The rule in the canton of Basel-Landschaft
Free-standing small buildings without combustion equipment up to 12 m² and 2.50 m are not exempt but go through the small permit procedure at the municipality (§ 92 para. 1 let. a RBV).
What this means for your sauna
The exemption is meant for tool and garden sheds, not heated rooms where people spend time. On top of that, almost every sauna exceeds the size limit. Expect to file an application – ask your municipality which procedure applies.
A sauna with a wood stove has combustion equipment and is therefore outside the small procedure – expect an ordinary application to the Building Inspectorate.
Procedure and responsible authority
The responsible authority is usually your municipality. Many cantons have a simplified procedure (notification) for minor projects; otherwise the ordinary procedure with public notice applies.
Step by step
Note the dimensions
External dimensions including roof and chimney, heater type, planned location and distance to the boundary.
Check the zone
On the cantonal geoportal or at the municipality: is the plot in a core or protected zone?
Ask the building office
A short enquiry with a sketch and product sheet tells you whether and which procedure applies.
Paperwork
Good suppliers provide plans and data sheets you can use directly for the application.
Important: this page summarises the rules in plain language and does not replace information from the responsible authority. The legal texts in force and your municipality's decision are binding; municipalities may have stricter rules. Updated: September 2026.
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