Building application in Solothurn
Local submission route and documents
Source checked: 24.10.2026
Canton of Solothurn16 local pages · all municipalities served
Building permit in the canton of Solothurnfor pergolas, louvred roofs, carports, garden sheds, pools and more
What is permit-free in the canton of Solothurn, what needs a notification and when a building application is required, with the legal basis and our fixed-price service for towns and villages across the canton.
Permit-free in the canton of Solothurn: Only very minor projects expressly listed in § 3ter KBV are permit-free. Garden sheds, roofed pergolas, carports and pools generally require a building application.
Overview of all structures in the canton of Solothurn
| Structure | Classification | Rule | Legal basis |
|---|---|---|---|
| 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. | § 3ter KBV |
| Louvred roof | Building permit required | Covered patios require a building permit. | § 3 KBV |
| Patio cover | Building permit required | Patio covers require a building permit. | § 3 KBV |
| Carport | Building permit required | Carports require a building permit. | § 3 KBV |
| Garden shed | Building permit required | Garden sheds generally require a building application; only very small projects under § 3ter KBV are exempt. | § 3ter KBV |
| Pool | Building permit required | Permanently installed pools require a building permit. | § 3 KBV |
| Heat pump (outdoor unit) | Depends on size and location | Heat pump outdoor units: notification or building application depending on the noise certificate. | § 3ter KBV, LSV |
| 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. | Art. 18a RPG, Leitfaden Solaranlagen SO |
Procedure in the canton of Solothurn
Legal basis: Planning and Building Act (PBG) and Cantonal Building Ordinance (KBV). Go to the cantonal information page.
Submission: digitally via eBau Solothurn in activated municipalities, otherwise to the municipality using the cantonal form.
Plan author: no formal professional qualification required.
Solothurn is considered a restrictive canton: permit-free projects are listed exhaustively in § 3ter KBV (revised in 2024). If in doubt, the building authority decides whether a project counts as minor.
How your application works with us in the canton of Solothurn
- Enquiry. You send us the address, structure, dimensions and photos, via form, e-mail or WhatsApp. Takes 3 minutes.
- Preliminary check. Within 2 working days you know whether it is permit-free, a notification or a building application, with the procedure, documents and fee range.
- Approval. You confirm via the payment link and sign the power of attorney digitally.
- Application file. We prepare forms, construction description, site plan, floor plan, section and enclosures, complete and compliant with the municipality's requirements.
- Submission. You sign, we submit (digitally or by post) and confirm receipt to you.
- Decision. We answer the municipality's queries. You receive the authority's decision and information on the next steps.
Questions about the building application in the canton of Solothurn
What is permit-free in the canton of Solothurn?
Only very minor projects expressly listed in § 3ter KBV are permit-free. Garden sheds, roofed pergolas, carports and pools generally require a building application.
How do I submit a building application in the canton of Solothurn?
Digitally via eBau Solothurn in the activated municipalities, otherwise at the municipality using the cantonal form. Solothurn is considered a restrictive canton: permit-free projects are listed exhaustively in § 3ter KBV (revised 2024). In case of doubt, the building authority decides whether a project counts as minor.
Who may draw up building plans in the canton of Solothurn?
No formal professional qualification required.
Building application costs and scope of services · Prepare it yourself or have it done? · Dossier lead time and authorities' procedure
Towns and municipalities
Submitting a building application: local guides in the canton of Solothurn
Digital submission, paper enclosures and signatures differ from place to place. These local pages contain notes with an official source.
Building application in Olten
eBauSO, check additional paper requirements
Source checked: 24.10.2026
Official bodies in the canton of Solothurn
We use these cantonal administration pages for every application. Checked on 24.10.2026.
- Cantonal service page on the building permit procedure with steps, forms and cost information
- Cantonal form for projects outside the building zone (Office for Spatial Planning)
- Cantonal eBau portal (eBauSO) for preliminary enquiries, building applications and notifications, access via my.so.ch
- Entry point to the cantonal online portal my.so.ch for building applications and public display of plans
- List of municipalities where the digital building application procedure via eBau is available
- The canton's questions and answers on the eBau portal for applicants
- Quick guides (PDF) for registering and creating a building application on the eBau portal
- Cantonal web GIS with maps, a
- Cantonal plan register with the legally valid zoning plans, zoning and building regulations of all municipalities
- Cantonal fee schedule (GT, BGS 615.11)
- Cantonal Building Ordinance (KBV, BGS 711.61) with rules on the form and content of the building application
All sources by municipality: list of sources.
Local pages in the canton of Solothurn
Every municipality has its own building and zoning regulations. We check them for your location, even if your village has no local page here.
Building application in the canton of Solothurn, from CHF 690, in 5 working days.
Assessment in 2 working days. Non-binding.