How to Buy a House in Switzerland As a Foreigner in 2026: Permits, Lex Koller & Financing

Understanding how to buy a house in Switzerland as a foreigner requires navigating a distinctive regulatory landscape that few other European countries replicate. The Federal Act on the Acquisition of Real Estate by Persons Abroad, universally known as Lex Koller, imposes permit requirements, cantonal quotas and property-type restrictions that vary dramatically depending on a buyer’s nationality, residence status and intended use of the property. Meanwhile, 2026 has introduced two important developments: construction-contract reforms that strengthen buyer defects rights on new builds, and Federal Council proposals to tighten foreign ownership rules further.

This guide walks through every stage of the process, eligibility checks, permit applications, the 20% equity requirement, cantonal restrictions and closing costs, so that foreign nationals and their advisors can plan a Swiss property purchase with confidence as of May 2026.

Quick Decision Checklist

• C permit (settlement permit) holder. You may purchase residential property anywhere in Switzerland, with essentially the same rights as a Swiss citizen. No Lex Koller authorization is required.
• B permit (residence permit) holder. You may purchase a principal residence at the location where you are registered, without authorization. Investment properties and holiday homes remain restricted.
• G permit (cross-border commuter). You may purchase a secondary residence in the area of your workplace, but not a principal residence or holiday home elsewhere. Authorization may be required depending on the canton.
• Non-resident (no Swiss permit). You may only purchase a holiday home in a designated tourist zone, subject to cantonal quotas, size limits and mandatory Lex Koller authorization. Commercial property purchases may qualify for an exemption.

Can a Foreigner Buy Property in Switzerland? Lex Koller Explained

Yes, but with significant conditions. Whether a foreigner can buy real estate in Switzerland depends on three variables: nationality, type of residence permit, and intended use of the property. The governing statute is the Federal Act on the Acquisition of Real Estate by Persons Abroad (BewG), commonly called Lex Koller, which has regulated foreign property ownership since 1983. Its core purpose is to prevent excessive foreign acquisition of Swiss land and residential real estate.

What Lex Koller Covers

Lex Koller draws a fundamental distinction between residential property and commercial or industrial property. Foreign nationals who wish to acquire residential real estate, whether a house, apartment or plot of building land, generally need cantonal authorization unless an exemption applies. By contrast, acquisitions of commercial or industrial premises used for a genuine business purpose are typically exempt, provided the buyer demonstrates that the property serves a permanent establishment.

The law applies to natural persons who are foreign nationals and do not hold a C permit, as well as to legal entities domiciled abroad or controlled by persons abroad. EU/EFTA nationals who reside in Switzerland and hold a valid B permit benefit from a key exemption: they may purchase a principal residence at their registered place of domicile without authorization. Non-EU/EFTA nationals holding a B permit enjoy the same exemption, but only for a principal residence and only at their registered address.

The Federal Council has signalled a tightening of Lex Koller, with proposals under discussion in 2026 that could further restrict non-resident holiday-home purchases and narrow certain commercial exemptions. Industry observers expect these proposals to increase the importance of early authorization checks and legal due diligence for every foreign buyer.

Eligibility: C, B, G Permits, Non-Residents and Corporate Buyers

The permit a foreign buyer holds is the single most important factor in determining buying property requirements in Switzerland. Below is a detailed breakdown of each category.

C permit (settlement permit). Holders of a C permit enjoy virtually identical rights to Swiss citizens when purchasing real estate. There is no requirement to seek Lex Koller authorization, no restriction on property type (principal residence, holiday home or investment property), and no cantonal quota applies. EU/EFTA nationals typically receive a C permit after five years of continuous residence; non-EU/EFTA nationals usually after ten years, although bilateral agreements may shorten this period.

B permit (residence permit). A B permit holder may buy a house in Switzerland, but only as a principal residence and only in the commune or canton where they are registered. This exemption applies equally to EU/EFTA and non-EU/EFTA nationals, although EU/EFTA nationals benefit from freedom-of-movement provisions that make renewal more straightforward. Investment properties, second homes and holiday apartments require Lex Koller authorization, which is rarely granted to B permit holders unless specific cantonal conditions are met.

G permit (cross-border commuter). G permit holders face the most restrictive rules. They may purchase a secondary residence in the region where they work, but acquiring a principal residence or holiday property elsewhere requires authorization. In practice, few G permit holders pursue property purchases because of the limited geographic scope and the difficulty of obtaining financing without Swiss-domiciled income.

Non-residents. Persons with no Swiss residence permit may only purchase holiday homes in federally designated tourist zones, subject to cantonal quotas and maximum size limits (typically up to 200 m² of net living area). Each acquisition requires individual authorization from the cantonal authority.

Examples and Mini Case Studies

• EU national with B permit in Zurich. A German citizen holding a B permit and registered in Zurich may purchase an apartment or house in Zurich as a principal residence, without authorization. Purchasing a holiday apartment in Graubünden would require cantonal Lex Koller authorization.
• US non-resident purchasing in Valais. An American citizen without a Swiss permit may purchase a ski chalet in a designated tourist zone in Valais, provided the canton has available quota, the net living area does not exceed 200 m² and the cantonal authority grants authorization. The process typically takes two to four months.

Documents the Canton Will Typically Review

• Copy of valid residence permit (B, C or G)
• Proof of registration at commune of domicile
• Employment contract or proof of economic activity in Switzerland
• Purchase contract (draft) reviewed by the public notary
• Confirmation that the property will serve as principal residence (for B permit buyers)
• Floor plans and confirmation of net living area (for holiday-home applications)

How to Buy a House in Switzerland: Step-by-Step Transaction Process

The process of buying property in Switzerland follows a structured sequence that typically takes between eight and sixteen weeks from signed reservation to land register entry. Foreign buyers should allow additional time, up to four months, if cantonal Lex Koller authorization is required.

Finding and Reserving Property

Most Swiss property searches begin on platforms such as Homegate, ImmoScout24 or Newhome, or through a licensed estate agent. Before making a reservation offer, foreign buyers should verify two things: first, whether the property sits in a zone where they are eligible to purchase (especially relevant for non-residents seeking holiday homes); and second, whether the seller has flagged any Lex Koller restrictions in the listing.

A reservation agreement is common but not mandatory. It typically involves a non-refundable deposit of CHF 5,000 to CHF 50,000 and gives the buyer a defined period, usually two to four weeks, to arrange financing and submit any required authorization applications. The reservation agreement should specify that it is conditional upon obtaining cantonal authorization where applicable.

Applying for Lex Koller Authorization

If authorization is required, the application is filed with the relevant cantonal authority (usually the cantonal land registry office or a dedicated Lex Koller department). The buyer must submit the draft purchase contract, proof of identity, details of the property (including floor plans and net living area for holiday homes), evidence of financing, and a declaration of intended use.

Processing times vary by canton. Simpler applications in tourist-friendly cantons such as Valais or Graubünden may take four to eight weeks. More complex cases, particularly corporate acquisitions or applications in cantons with limited quota, can take three to four months. The authorization decision is binding: if refused, the transaction cannot proceed, and the buyer’s deposit is typically returned minus administrative costs.

Notary Signature and Title Registration

All Swiss real estate transactions must be executed before a public notary. The notary prepares the official deed of sale (Kaufvertrag), verifies the identities of both parties, confirms that financing is in place, and registers the transfer with the cantonal land registry (Grundbuchamt). The buyer and seller must both appear in person or appoint a representative with a notarised power of attorney.

After the notary appointment, the land registry processes the transfer. Registration typically takes one to four weeks depending on the canton. Ownership transfers legally upon entry in the land register, not at the notary appointment, an important distinction for foreign buyers coordinating mortgage drawdowns and payment transfers.

Financing: Mortgages, 20% Equity, Pension Funds and the Affordability Test

Swiss mortgage rules are conservative by international standards. Lenders typically finance a maximum of 80% of the property’s market value (or the purchase price, whichever is lower), meaning the buyer must provide at least 20% equity. This 20% equity requirement in Switzerland is non-negotiable for residential purchases and is enforced uniformly across major banks.

Sources of Equity

Of the 20% minimum equity, at least 10% of the purchase price must come from the buyer’s own funds, meaning cash savings, securities, gifts, or proceeds from the sale of another property. The remaining 10% may come from the buyer’s Swiss occupational pension (2nd pillar / BVG), subject to certain conditions. Buyers should be aware that withdrawing 2nd pillar funds reduces retirement savings and may trigger tax consequences. Pension fund withdrawals for owner-occupied property are only permitted once every five years, and spouses must provide written consent.

Third-pillar (3a) retirement savings may also be used as equity for a principal residence purchase, subject to similar tax and withdrawal rules. Funds borrowed from family members are generally accepted as equity, provided the bank receives a written confirmation that the loan is subordinated to the mortgage.

Affordability Test and Stress Rate

Swiss banks apply a rigorous affordability test that goes well beyond simply verifying the deposit. The bank calculates the buyer’s total annual housing costs, including mortgage interest at an imputed stress rate (typically 4.5% to 5%, regardless of the actual contractual rate), amortisation of the second-rank mortgage, and ongoing maintenance costs (usually estimated at 1% of the property value per year). These total annual costs must not exceed one-third of the buyer’s gross household income.

For foreign buyers, the affordability test can be a significant hurdle. Income earned in foreign currencies may be discounted by the bank to account for exchange-rate risk. Self-employed buyers and those with variable income face additional documentation requirements, and some banks apply stricter ratios to non-Swiss-domiciled income streams.

Mortgages for Non-Residents

Swiss banks do lend to non-residents, but under substantially stricter conditions. The maximum loan-to-value ratio for non-resident buyers is often reduced to 50% to 60%, requiring the buyer to bring 40% to 50% equity. Interest rates for non-resident borrowers are typically higher than standard Swiss rates, and some banks require the mortgage to be denominated in Swiss francs even where income is earned in another currency. Non-residents are generally advised to approach Swiss private banks or cantonal banks with established foreign-client desks.

Cantonal Restrictions and Tourist-Area Rules

Cantonal restrictions on property ownership in Switzerland are where Lex Koller’s national framework meets local reality. Each canton implements the federal law through its own administrative procedures, and the practical experience of buying a holiday home or investment property varies enormously by location.

For non-residents seeking holiday homes, the key variable is whether the property lies within a federally designated tourist zone. Only properties in these zones are eligible for Lex Koller authorization. Cantons set their own annual quotas for foreign holiday-home purchases, and once a canton’s quota is exhausted for the year, no further authorizations are issued until the following year. Size limits typically cap net living area at 200 m², with some cantons applying lower thresholds.

In addition, the Second Homes Act (Zweitwohnungsgesetz), which came into force in 2016, limits new second-home construction in municipalities where second homes already exceed 20% of total housing stock. This affects many popular resort towns in Valais, Graubünden and the Bernese Oberland, restricting the supply of newly built holiday apartments available to foreign buyers.

Costs, Taxes and Ongoing Obligations

Beyond the purchase price and 20% equity in Switzerland, foreign buyers should budget for several categories of transaction costs and ongoing expenses. These vary by canton, but the following framework applies broadly.

Illustrative Cost Breakdown (Purchase Price: CHF 1,000,000)

Ongoing annual costs include property tax and wealth tax (both cantonal), building insurance, maintenance reserves, and, for condominiums, shared-area contributions (Stockwerkeigentümer-Gemeinschaft charges). Foreign buyers who rent out a holiday property must declare rental income in Switzerland and may face withholding obligations depending on their country of tax residence.

2026 Regulatory Changes: Construction Contract Reforms and Lex Koller Tightening

Two regulatory developments in 2026 directly affect how to buy a house in Switzerland as a foreigner, making professional legal advice more important than in previous years.

Construction contract reforms (effective 1 January 2026). Amendments to Swiss construction-contract law have strengthened the rights of buyers purchasing new-build properties. The reforms expand the statutory defects-liability period, impose clearer disclosure obligations on developers, and introduce enhanced protections for buyer deposits held during the construction phase. For foreign buyers purchasing off-plan, these changes mean stronger contractual safeguards, but only if the purchase agreement is drafted to incorporate the new statutory rights. Industry observers expect that buyers who rely on standard-form developer contracts without legal review may not fully benefit from the reforms.

Federal Council proposals to tighten Lex Koller. In early 2026, the Federal Council proposed amendments to Lex Koller that would narrow certain commercial-property exemptions and impose stricter scrutiny on holiday-home acquisitions by non-residents. As of May 2026, these proposals remain under parliamentary consultation and have not yet been enacted. Early indications suggest that if adopted, the amendments would reduce cantonal quotas and introduce additional anti-avoidance provisions targeting corporate structures used to circumvent Lex Koller restrictions.

Practical Checklist for Buyers in Light of 2026 Reforms

• New-build purchases. Ensure the purchase contract expressly incorporates the 2026 defects-liability provisions; include clauses requiring developer disclosure of subcontractor details and deposit-protection mechanisms.
• Lex Koller authorization. Apply early, if the Federal Council proposals are adopted, cantonal quotas may tighten mid-year. Buyers with pending applications should seek legal advice on transitional provisions.
• Corporate structures. Existing corporate ownership structures should be reviewed against the proposed anti-avoidance rules to ensure continued compliance.
• Contract review. All foreign buyers, whether acquiring a resale or new build, should have the purchase contract reviewed by a Swiss real-estate lawyer before signing the reservation agreement.

Conclusion

For foreign nationals weighing how to buy a house in Switzerland as a foreigner, the path forward depends almost entirely on permit status, property type and canton. C permit holders face no meaningful restrictions. B permit holders can purchase a principal residence at their registered domicile. Non-residents remain limited to holiday homes in tourist zones, subject to cantonal quotas that the Federal Council has proposed to tighten further in 2026. Across all categories, the 20% equity rule, the affordability stress test and cantonal transfer costs are constants that require careful financial planning well before any reservation is signed.

The 2026 construction-contract reforms offer welcome protection for new-build buyers, but only for those whose purchase agreements are drafted to reflect the new statutory provisions. Similarly, the likely practical effect of the proposed Lex Koller amendments will be to reward buyers who engage Swiss legal counsel early in the process, before committing capital to a reservation deposit or filing an authorization application that may face increased scrutiny. Whether you are a resident upgrading to your first Swiss home or a non-resident investor seeking a resort property, qualified legal guidance remains the most reliable way to avoid costly delays and ensure a successful purchase.

Sources

1. ch.ch, Purchasing property in Switzerland as a foreign national
2. Swiss Federal Office of Justice, Acquisition of real estate by persons abroad
3. Swissinfo, Access to Swiss housing restricted for foreigners
4. MoneyPark, Deposits for house purchases
5. Wise, Buying property in Switzerland
6. Engel & Völkers, Lex Koller guide
7. Packimpex / MyJourney, Buying property in Switzerland complete guide
8. Knight Frank, Buying property in Switzerland