Building permit in Gossaufor pergolas, louvred roofs, carports, garden sheds and pools
For small structures in Gossau, the building law of the canton of St. Gallen applies, plus the municipality's building and zoning regulations. We prepare the complete application, submit it to the competent building authority and support you through to the decision: fixed price from CHF 690.
A digital service by SL Handel GmbH, based in Zug, for your project in Gossau.
What needs a permit in Gossau
| Structure | Classification (canton of St. Gallen) | Rule |
|---|---|---|
| Pergola | Building permit required | The administrative court classified a roofed pergola as a building; open pergolas are assessed case by case: a preliminary assessment is recommended. |
| Louvred roof | Building permit required | Covered patios require a building permit. |
| Patio cover | Building permit required | Patio covers and large shade sails require a building permit. |
| Carport | Building permit required | Carports require a building permit. |
| Garden shed | Depends on size and location | Small garden sheds may fall under Art. 136 para. 2 PBG; larger ones need a building application to the municipality. |
| Pool | Building permit required | Permanently installed pools require a building permit. |
| Heat pump (outdoor unit) | Depends on size and location | Outdoor units: notification with a noise certificate, or a building application. |
| Solar installation (special case) | Depends on size and location | Solar installations under the RPG: notification (cantonal notification form 2026). Protected properties, open land, solar carport: building application. |
This table shows the cantonal rules. The municipality of Gossau may set additional requirements in core zones, protected townscape areas and through its building regulations. We check the zoning plan and regulations for your plot. Cantonal information source.
Gossau at a glance
- Competent office
- Building Secretariat (Bausekretariat), Gossau
- Submission
- The documents are submitted in triplicate with the cantonal form G1, and additionally in digital form if cantonal offices are involved.
- Building and zoning regulations
- Available from the municipality; we obtain it for you.
- Municipal fees
- According to the municipal fee schedule, paid directly to the municipality.
- Cadastral plan
- From the geoportal of the canton of St. Gallen; we obtain the extract.
- Plan author
- No formal professional qualification required.
Official sources checked on 24 October 2026. The municipality's information is authoritative.
How much does a building application cost in Gossau?
| Preliminary check: is a permit needed? | CHF 149credited |
| Complete application for a pergola, louvred roof, carport, garden shed, pool or heat pump | CHF 690fixed price |
| Solar special case (core zone or protected building) | CHF 1'290fixed price |
| Gossau municipal fee | as per tariffyou pay the municipality |
Example: a 20 m² louvred roof on your house in Gossau. You pay us CHF 690 for the application file, submission and follow-up queries. The municipality invoices its permit fee separately. We tell you the expected amount in the preliminary check.
Request a fixed price for GossauDocuments for your building application in Gossau
You provide little, we handle the rest. Here is how it is split:
To the building application checklist with official submission examples
What you send us
- Address of the property in Gossau
- 3 to 5 photos of the site (façade, patio, towards the boundary)
- Dimensions or the manufacturer's drawing of the product
- Signature of the building owner and the landowners
- For condominium ownership: consent of the owners' association
What we obtain and prepare
- Cadastral plan from the official survey
- Site plan with the structure, dimensions and boundary distances
- Application form for the canton of St. Gallen, fully completed
- Construction description, elevations and list of enclosures
- Check of the Gossau zoning plan and regulations
- Depending on the structure: noise certificate (heat pump), neighbours' consent
Frequently asked questions about building applications in Gossau
Where do I submit a building application in Gossau?
The documents are submitted in triplicate with the cantonal form G1, and additionally in digital form if cantonal offices are involved. The responsible office is the Building Secretariat («Bausekretariat») of the municipality of Gossau.
Do I need a permit for a louvred roof in Gossau?
Covered seating areas require a building permit. Legal basis: Art. 136 PBG.
Is a garden shed exempt from a permit in Gossau?
Small garden sheds may fall under Art. 136 para. 2 PBG; larger ones need a building application at the municipality. Legal basis: Art. 136 Abs. 2 PBG.
How much does a building application cost in Gossau?
With us, CHF 690 fixed price for the complete application, including submission and follow-up queries; the preliminary check (CHF 149) is credited. The authority's fees come on top and are based on the fee schedule of the municipality of Gossau. We state the expected amount in the preliminary check.
Who may draw up the building application plans in Gossau?
No formal professional qualification required.
How long does a building application take in Gossau?
We prepare the application file within 5 working days of receiving all required documents. The authority's processing time depends on the procedure, completeness and any objections.
Already built in Gossau?
If the municipality of Gossau requires a retrospective building application, the deadline is running. We confirm it on the same working day, check whether the project can be approved and submit within 3 working days. Retrospective building application
How to sign a building application in Gossau
Who signs, whether a scan is sufficient and what simplifications apply. We apply this information automatically in your dossier.
- Submission
- Formular G1 (electronic submission in preparation)
- Who signs
- The landowner, the applicant and the project author; the form has a separate field for the tenant or installation operator.
- Form of signature
- Paper original required
Submission on paper, usually in triplicate, with original signatures. Electronic procedural steps are planned from 2027. - Small projects
- Simplified procedure (Art. 82bis PBG). Solar installations: notification form no later than 30 days before construction starts.
- Power of attorney
- We submit as your authorised representative. We enclose the power of attorney with the application, so we need it with your handwritten signature.
- Tenancy, condominium ownership
- Tenants need the landlord's written consent (Art. 260a CO); as landowner, the landlord also signs the application. With condominium ownership, structural changes to common parts (façade, roof, patio with exclusive right of use) generally require the consent of all condominium owners or a resolution of the owners' meeting (Art. 647d, 647e and 712g CC). The condominium regulations are decisive.
- Neighbours
- Neighbours' consent is usually voluntary but often speeds up the procedure. If boundary or building distances are not respected, it is required, depending on the canton as an easement entered in the land register.
- Good to know
- Plan colours: existing black, demolition yellow, new red.
As of October 2026. Practice differs between municipalities; the municipality and canton are authoritative. Sources: Canton of St. Gallen: notification of solar installations.
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Building application in Gossau, from CHF 690.
Assessment in 2 working days. Non-binding.