How do I know whether my parcel is in the building zone?
The RDPPF extract and the municipal land-use plan say so. The cantonal geoportal lets you check it free of charge from the address or the EGRID number.
Glossary
Building zone: definition and consequences
The building zone (zone à bâtir, Bauzone) is the land that a Swiss municipal land-use plan assigns to construction. It is delimited under article 15 of the federal Spatial Planning Act and may not exceed the foreseeable needs of fifteen years. Outside its perimeter, building is allowed only exceptionally.
Definition and legal framework
The federal Spatial Planning Act (SPA, SR 700) divides Swiss territory into three main categories: building zones, agricultural zones and protection zones. In the building zone, construction is permitted in principle, subject to the municipal building regulations. Its size is not discretionary: since the SPA revision that entered into force in 2014, a building zone may not exceed the foreseeable needs of fifteen years, which has led many municipalities to resize — sometimes to shrink — their reserves.
Being in the building zone says nothing in itself about what may be built. The land-use plan sets the precise use (residential, mixed, activities, village zone, public-interest zone) and the municipal regulations set the utilisation index, heights and setbacks. A parcel inside the building zone but covered by a reserved zone, a mandatory neighbourhood plan or a protected perimeter can remain unbuildable in practice for years.
What it changes for your parcel
Membership of the building zone is the first filter in any parcel analysis: it drives buildability, value and access to financing. Land outside the building zone may only be built on under the strict conditions of articles 24 ff. SPA — keeping an existing building, justified agricultural structures, partial alterations — and never freely.
The information appears on the parcel's RDPPF extract under the "land-use plans" theme. Watch for intermediate situations: a reserved zone, an ongoing land-use plan revision or a natural-hazard perimeter can suspend the right to build even though the parcel is formally in the building zone.
How to obtain it
Consult the parcel's RDPPF extract (cantonal ÖREB portal, reachable from cadastre.ch) or your canton's geoportal: the land-use plan theme names the zone. The municipal building regulations, published by the municipality, then give the applicable rules.
Frequently asked questions
Can you build outside the building zone?
Only exceptionally, under articles 24 ff. SPA: justified agricultural buildings, keeping or partially altering existing buildings — requiring a special cantonal authorisation on top of the municipal permit.
Is a parcel in the building zone necessarily buildable?
No. A reserved zone, a mandatory neighbourhood plan, a protected perimeter, a natural hazard or missing servicing can prevent building despite the zoning.
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