Building permit in Trimbachfor pergolas, louvred roofs, carports, garden sheds and pools
Small structures in Trimbach are subject to the building law of the canton of Solothurn 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.
Digital service by SL Handel GmbH, based in Zug, for your project in Trimbach.
What needs a permit in Trimbach
| Structure | Classification (canton of Solothurn) | Rule |
|---|---|---|
| Pergola | Building permit required | Pergolas are not on the list of permit-free projects. If in doubt, submit a building application or ask the building authority for a preliminary assessment. |
| Louvred roof | Building permit required | Covered patios require a building permit. |
| Patio cover | Building permit required | Patio covers require a building permit. |
| Carport | Building permit required | Carports require a building permit. |
| Garden shed | Building permit required | Garden sheds generally require a building application; only very small projects under § 3ter KBV are exempt. |
| Pool | Building permit required | Permanently installed pools require a building permit. |
| Heat pump (outdoor unit) | Depends on size and location | Heat pump outdoor units: notification or building application depending on the noise certificate. |
| Solar installation (special case) | Depends on size and location | Well-integrated roof or façade installations: notification procedure (canton of Solothurn solar installation guide 2026). Protected zones, open land, solar carport: building permit. |
This table shows the cantonal rules. The municipality of Trimbach can set additional requirements in core zones, in areas protecting the local townscape and through its building regulations. We check the zoning plan and regulations for your plot. Cantonal information source.
Trimbach at a glance
- Competent office
- Trimbach building office (Bauamt)
- Submission
- Building applications are currently processed by Sutter Ingenieur- und Planungsbüro AG, which you should contact directly with any questions about your application.
- Building and zoning regulations
- Regulations and zoning plan of Trimbach
- Municipal fees
- According to the municipal fee schedule, paid directly to the municipality.
- Cadastral plan
- From the geoportal of the canton of Solothurn; 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 in Trimbach cost?
| 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 |
| Fee charged by the municipality of Trimbach | as per tariffyou pay the municipality |
Example: a 20 m² louvred roof on your house in Trimbach. You pay us CHF 690 for the dossier, 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 TrimbachDocuments for your building application in Trimbach
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 Trimbach
- 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 of the canton of Solothurn, fully completed
- Construction description, elevations and list of enclosures
- Check of the zoning plan and regulations of Trimbach
- Depending on the structure: noise certificate (heat pump), neighbours' consent
Frequently asked questions about building applications in Trimbach
Where do I submit a building application in Trimbach?
Building applications are currently processed by Sutter Ingenieur- und Planungsbüro AG, which you should contact directly with any questions about your application. The competent office is the building office (“Bauamt”) of the municipality of Trimbach.
Do I need a permit for a louvred roof in Trimbach?
Covered patios require a building permit. Legal basis: § 3 KBV.
Is a garden shed in Trimbach permit-free?
Garden sheds generally require a building application; only very small projects under § 3ter KBV are exempt. Legal basis: § 3ter KBV.
How much does a building application in Trimbach cost?
With us, a fixed price of CHF 690 for the complete application including submission and follow-up queries; the preliminary check (CHF 149) is credited. The authority's fees are added and are based on the fee schedule of the municipality of Trimbach. We tell you the expected amount in the preliminary check.
Who may draw up the building application plans in Trimbach?
No formal professional qualification required.
How long does a building application in Trimbach take?
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 Trimbach?
If the municipality of Trimbach requires a retrospective building application, the deadline is decisive. 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 Trimbach
Who signs, whether a scan is sufficient and what simplifications apply. We apply this information automatically in your dossier.
- Submission
- eBauSO (my.so.ch)
- Who signs
- The building owner, the landowner and the project author.
- Form of signature
- Paper original required
Electronic submission is optional; municipalities will be connected by the end of 2026. The signed signature sheet goes by post to the municipality; the application is not processed until then. - Small projects
- Notifications are possible via eBau. Submission on paper remains permitted.
- 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.
As of October 2026. Practice differs between municipalities; the municipality and canton are authoritative. Sources: Canton of Solothurn: questions about eBau.
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Building application in Trimbach, from CHF 690.
Assessment in 2 working days. Non-binding.