Louvred roof: do I need a building permit?
A louvred roof protects against rain and sun. Because it protects against the weather, almost all cantons and municipalities treat it like a covered seating area: it counts towards the built area, must meet boundary distances and usually needs a building permit, even if the dealer says otherwise.
The dossier lead time starts once payment and all required documents have been received. Signatures and the authorities' procedure come on top. Understand the timeline.
Louvred roof: clarify roof function and location
For a louvred roof, calling it a pergola is not enough for its classification under building law. What matters is whether the louvres close, what area is covered and whether side glazing is planned. Manufacturer plans help to compare this design with the cantonal rules.
Prepare the building application yourself or have it prepared?
Have ready for the preliminary check
- Manufacturer plan with open and closed louvres
- Outer dimensions and maximum height of the structure
- Roof drainage and fixing to the façade or ground
- Planned side walls, glazing and boundary distances
The first enquiry is free. The site-specific preliminary check costs CHF 149 and is credited against the subsequent application.
Have my louvred roof checkedLouvred roof: rules in 9 cantons (as of October 2026)
Applies within the building zone and outside core zones and protected areas. Municipalities may be stricter.
| Canton | Classification | Rule | Legal basis |
|---|---|---|---|
| Zurich | Building permit required | A louvred roof counts as a covered pergola or patio cover and requires a building permit. Depending on the municipality, notification or simplified procedure. | § 309 PBG, § 1 BVV |
| Aargau | Building permit required | Covered patios up to 40 m² and 3 m high follow the simplified procedure; larger ones the ordinary procedure. | § 50 BauV |
| Zug | Building permit required | With a fixed or movable roof, the structure counts as a small structure and needs a building application. | § 44 PBG |
| Lucerne | Building permit required | A louvred roof protects against the weather and therefore requires a building permit. Plan authors must be qualified professionals; our partner co-signs. | § 184, § 188 PBG |
| Bern | Building permit required | Covered patios over 10 m² require a building permit; a small permit procedure without publication is often possible. | Art. 1a BauG, Art. 6 BewD |
| Solothurn | Building permit required | Covered patios require a building permit. | § 3 KBV |
| Basel-Landschaft | Building permit required | If the area can be protected from the weather by fixed or movable installations, it counts as a covered patio: subject to distance rules and a permit, ordinary application to the building inspectorate. | § 94 RBV, practice since 1.1.2022 |
| St. Gallen | Building permit required | Covered patios require a building permit. | Art. 136 PBG |
| Thurgau | Building permit required | Covered patios require a building permit. | § 98 PBG |
Non-binding overview without guarantee. The cantonal building law, your municipality's building and zoning regulations and the decision of the building authority are authoritative. We examine your specific case.
What the building application for a louvred roof contains
- Cantonal building application form, fully completed, with the client, landowner and plan author.
- Site plan 1:500 based on the official cadastral survey, with the structure drawn in, dimensions and distances to boundaries and roads.
- Floor plan, section and elevation with all height and length dimensions, materials and colours.
- Construction description covering use, construction, drainage and the justification of any exceptions.
- List of enclosures and (where required) neighbours' signatures, noise certificate, energy certificate or design certificate.
- Instructions for profile poles (outline markers), if the municipality requires them.
To the full document checklist and local submission routes
Typical mistakes that can lead to queries
- Boundary distance not respected or not clearly dimensioned.
- Structure planned between the building line and the road without checking.
- The type of fixing is used as the only criterion, without checking use, duration and local rules.
- Landowner's signature missing (condominium ownership: consent of the owners' association).
- Core zone or listed property not recognised, where separate design rules apply.
Frequently asked questions about louvred roofs
Can I put up a louvred roof without a building permit?
It depends on the type of construction, size, location and the cantonal and municipal regulations. Check in particular the zone, protection status and distances. Our free check is an initial assessment; in the preliminary assessment we clarify the specific location and the procedure with the competent office.
How much does the building application for a louvred roof cost?
With us, CHF 690 fixed price for the dossier including submission and follow-up questions. Official fees and any agreed additional services are extra. You receive the scope of services before you place the order.
Are rotating louvres automatically permit-free?
No. Movable louvres do not replace checking the roof function and local building regulations. What counts is the construction actually planned.
Can I use the manufacturer drawing for the building application?
It is an important basis. The submission may also require a site plan, distances, elevations, forms and signatures. We check which details need to be added for your location.
How long does the permit for a louvred roof take?
Our application file turnaround is 5 working days after receipt of payment and all the necessary documents. The authority's processing is separate and depends on the procedure, requests for additional information and any objections.
What happens if the louvred roof is already built?
Send us any existing plans, photos and letters from the building authority. We review the next steps for the dossier and the deadlines set in the letter. Our package for retrospective building applications costs CHF 990; the authority decides on the permit.
Louvred roof by canton
Louvred roof planned or already built?
Assessment in 2 working days, application file in 5 working days once all documents are complete. Fixed price CHF 690.