Term

Lex Koller: Definition and Application

Definition

Lex Koller is the informal name for the Federal Act on Acquisition of Real Estate by Persons Abroad (German: Bundesgesetz über den Erwerb von Grundstücken durch Personen im Ausland, abbreviated as BewG). It is a federal Swiss law that restricts or requires authorisation for the purchase of Swiss real estate by foreign nationals and non-resident persons. The informal name derives from Federal Councillor Arnold Koller, Swiss Federal Justice Minister during a period of heightened enforcement focus in the 1990s.

The law was originally enacted in 1983 and builds on earlier restrictions dating to the 1960s. Its purpose is to prevent foreign domination (Überfremdung) of the Swiss real estate market and to protect Swiss residential housing from becoming purely an international investment asset class at the expense of domestic affordability.

Who Lex Koller Applies To

Lex Koller categorises buyers according to nationality and residence permit status:

Not subject to Lex Koller:

Swiss citizens (regardless of where they live)
EU/EFTA nationals legally resident in Switzerland (B or C permit holders)
Non-EU/EFTA nationals holding a Swiss permanent residence permit (C permit)

Subject to Lex Koller restrictions:

Foreign nationals who are not resident in Switzerland
Non-EU/EFTA nationals who are resident in Switzerland but hold only a temporary residence permit (B permit) and have not yet obtained a C permit

The C permit threshold is critical. A US citizen, UK citizen (post-Brexit), Indian national, or any other non-EU/EFTA national can eventually escape Lex Koller restrictions entirely — but only after accumulating the residence history required for a C permit, which is generally five years for some nationalities and ten years for others, subject to integration criteria.

What Lex Koller Restricts

The primary restriction is on the acquisition of residential real estate — apartments, houses, and other property used for residential purposes — by persons requiring authorisation.

Lex Koller also restricts:

Vacation homes in tourist areas: Even citizens of countries otherwise exempt from main Lex Koller provisions may face restrictions on vacation home purchases in Swiss resort cantons, where annual cantonal quotas strictly limit foreign acquisitions
Indirect acquisition: Purchasing shares or interests in a Swiss company where the primary asset is Swiss residential property also triggers Lex Koller analysis

Authorisation to purchase residential property is generally not granted for standard market purchases. The law provides limited exception grounds — primarily for genuine primary residences of persons who will become Swiss residents — but in practice the restriction functions as a near-absolute barrier to residential ownership for non-resident and non-C-permit foreign nationals.

Key Exceptions

Commercial Real Estate: The Critical Exception

Lex Koller does not apply to commercial real estate. Non-resident foreigners and non-EU/EFTA nationals without a C permit may freely purchase offices, warehouses, industrial buildings, retail premises, and other non-residential property anywhere in Switzerland. This is the most practically significant exception.

The commercial property exception reflects the law’s underlying purpose — protecting the residential housing market — rather than restricting foreign commercial investment. For Canton of Zug’s Crypto Valley, this means blockchain companies and foundations can purchase commercial real estate without restriction, even where their founders personally face residential restrictions.

EU/EFTA Nationals with Swiss Residence

EU and EFTA nationals holding a Swiss residence permit (either B temporary or C permanent) are fully exempt from Lex Koller for residential property purchase. Their rights are equivalent to Swiss citizens in this respect, reflecting Switzerland’s bilateral agreements with the EU.

C Permit Holders of Any Nationality

Any foreign national — regardless of origin — who holds a Swiss permanent residence permit (C permit) is exempt from Lex Koller restrictions on residential property purchase. This provides a defined pathway to full property ownership rights for long-term Swiss residents.

Practical Implications

For Crypto Valley entrepreneurs: The majority of Crypto Valley’s international founding community are non-EU/EFTA nationals. This community has been restricted from purchasing residential property until C permit eligibility — typically five or more years after arrival. The practical consequence is that high-income, wealthy international blockchain professionals are channelled into Zug’s rental market during their initial years in Switzerland, supporting extreme rental demand and scarcity.

For property investors: Foreign investors considering Swiss residential real estate as an asset class face a clear structural barrier. Lex Koller effectively closes the Swiss residential market to most international capital that would otherwise be attracted to Swiss property’s stability and quality.

For commercial property buyers: Foreign-based investors and companies seeking Swiss commercial real estate face no Lex Koller obstacle. Swiss commercial property — offices, logistics, retail — is fully accessible to international capital.

For planning purposes: Foreign nationals considering relocating to Switzerland should factor Lex Koller into their planning timeline. Residential ownership becomes available on the EU/EFTA bilateral basis immediately if the person qualifies as an EU/EFTA national with residence; otherwise, the C permit pathway implies a 5-10 year rental period before residential ownership becomes legally accessible.

Grundbuch — Swiss cantonal land registry; the official record of property ownership and the mechanism through which property title transfers
C Permit (Niederlassungsbewilligung) — Swiss permanent residence authorisation that triggers exemption from Lex Koller residential restrictions
SECO — State Secretariat for Economic Affairs; oversees national Lex Koller compliance
Lex Weber — separate Swiss law (2012 federal initiative) restricting vacation homes to 20% of total housing stock in any municipality; complements but is distinct from Lex Koller

This encyclopedia entry is informational only and does not constitute legal advice. Lex Koller application is complex and fact-specific. Consult a qualified Swiss lawyer for advice on your specific situation. See our Disclaimer.

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