Patio roofs in Sevelen
We build attached and freestanding timber patio roofs and canopies in Sevelen. Roof covering, foundations and drainage are planned to suit the house, with permit requirements checked with the relevant authority.
References
The Sevelen carport shows a timber structure with a large span. The Wangs and Oberriet projects show patio roofs attached to existing homes.
At a glance
Use cases
For seating areas, terraces and entrances. A covered roof protects from rain; an open pergola mainly provides shade and less protection from driving rain.
Structure & roof cover
Attached or freestanding, with a visible glulam or structural timber frame. The finish can be natural, stained or opaque. Use, daylight, upkeep and the facade guide the design.
Cost factors
Cost depends mainly on span, roof cover, foundations, drainage and visible timber quality. After photos and site measure, we give a realistic range.
Choose the structure
Use, facade, available space and daylight determine the structure.
Attached to the house
The standard option for terraces and seating areas directly at the facade. facade change, wall connection and the visible water path become early planning topics.
Freestanding in the garden
Useful when the sheltered spot should sit away from the house. Foundations, boundary distance and discharge route across the plot become more important.
Canopy / entrance area
For front doors, side entrances or smaller transitions. Projection, drip edge and facade presentation matter more here than roof size.
Pergola / open weather cover
Best when shade, openness and a lighter look matter more than fully dense weather protection. Roof cover and permit requirements still need to fit the real use.
Roof covering
The covering determines daylight, upkeep and the required roof slope.
Permits and setbacks
Structure, setbacks and facade changes determine the required documents.
The local building office is the right first contact when it is unclear whether a project is treated as a projection, an extension or an accessory structure, and whether a permit filing is required.
The municipal regulation gives orientation through Art. 25 and Art. 26 for accessory buildings, projections, height and setbacks. Site plan, sections, facades and drainage documents should be prepared early.
Note: this page is not legal advice. The binding interpretation always comes from the competent authority in Sevelen.
Site drainage
Drainage must suit the plot and local requirements.
The municipal drainage documents prioritise infiltration through the ground for terraces and seating areas where technically possible. Where infiltration is intended, enough soil and humus depth should be considered early.
- Plan for at least 30 cm of humus where infiltration is intended
- Do not plan underground infiltration systems without permit clarification
Municipality of Sevelen: documents
For preparing the permit application and consulting the municipality.
- Building application process and advisory contactMunicipal building office and procedure
- Building application formsReference to the cantonal submission path
- Municipal building regulationOrientation values for projections and accessory structures
- Property drainage guidelineInfiltration, discharge and retention
Common questions
Do I always need a permit for a patio roof?
Not automatically. It depends on size, construction type and how the project is classified. Especially where the facade changes, early clarification with the local building office is advisable.
Which documents are typically required?
As orientation, the local regulation points to a site plan with distances, floor plans, sections, facades and drainage information. If the facade changes, the affected facade should be shown completely.
What counts more as a projection and what more as an accessory structure?
Smaller canopies and projecting roof elements may be classified as projections, while larger and more self-contained structures are more likely treated like extensions or accessory buildings. The binding classification always depends on the exact filing.
How is rainwater from terraces and seating areas usually handled?
The local guidance prioritises infiltration through the ground where technically possible. Where infiltration is planned, soil buildup and humus depth matter. If that is not feasible, the discharge path has to be coordinated properly; underground infiltration systems require permit clarification.
Quick request
A photo of the seating area, facade and connection zone is often enough for a first assessment. We then clarify which structure, roof cover and permit check fit the building in Sevelen.
Region
Gams, Sevelen, Buchs, Alt St. Johann, Wildhaus, Unterwasser, Sargans, Mels, St. Gallen, Herisau, Gossau, Wil SG, Uzwil, Flawil
Free first assessment
Ready for a quick opinion?
If you want, we can take a quick look at your Sevelen project. A few photos are enough for a first assessment of structure, roof cover and permit questions.