Before completing a Swiss property purchase, buyers should verify the land registry entry (Grundbuchauszug) for existing mortgages, easements (servitudes/Dienstbarkeiten), and rights of way, confirm the property's zoning classification and any building restrictions with the commune, and check whether Lex Koller authorization is required given the buyer's residence status. Because the notary handles the legal formalities of transfer but does not represent either party's commercial interests, buyers commonly engage an independent lawyer or surveyor for due diligence beyond the notary's neutral administrative role.
The Swiss notary is a neutral public official, not the buyer's advocate — anyone assuming the notary will flag a bad deal or hidden defect the way a buyer's solicitor might in other countries is likely to be surprised, which is why independent due diligence matters more here than in notary-light jurisdictions.
Key Facts
The land registry extract (Grundbuchauszug) discloses existing mortgages/liens, easements, and rights of way registered against the property — always request and review a current extract before signing.
The notary notarizes the transaction and ensures it is registered correctly, but acts neutrally and does not represent either the buyer's or seller's commercial interests — independent legal/technical due diligence is the buyer's responsibility.
Zoning classification (residential, mixed-use, agricultural) and any cantonal/communal building restrictions should be confirmed with the commune before purchase, especially for renovation or extension plans.
Lex Koller authorization requirements should be confirmed early for any buyer without full Swiss residency/C permit status, since this can block or delay a transaction.
A building survey/technical inspection (not automatically part of the notarial process) is recommended for older properties to check structural condition, since Swiss transactions do not have a standardized structural survey requirement like some other countries.
Steps
Request a current land registry extract — Verify there are no undisclosed liens, mortgages, or easements against the property.
Confirm zoning and building restrictions — Check with the commune for any restrictions relevant to intended use or planned renovations.
Verify Lex Koller status — Confirm whether foreign-ownership authorization is required based on the buyer's residence status.
Commission independent due diligence — Engage a lawyer and/or surveyor for commercial and structural review, since the notary's role is neutral and administrative.
Costs
Independent lawyer/surveyor due diligence: CHF 1,000-3,000+ depending on scope
Required Documents
Current land registry extract (Grundbuchauszug)
Zoning/building restriction confirmation from the commune
Lex Koller authorization (if applicable)
Common Mistakes
Assuming the notary will act as the buyer's advocate and catch unfavourable terms — the notary is a neutral public official, not a buyer's representative.
Skipping an independent structural survey on an older property, since Swiss practice does not mandate one the way some other countries do.
Not checking the land registry extract for existing easements or rights of way that could restrict future use of the property.