Published on June 2, 2026 and written by Cyril Jarnias

Buying real estate in Switzerland, whether you are a resident or a foreigner, is anything but a simple formality. Between the restrictions of the Lex Koller, quotas for vacation homes, widely varying cantonal taxes, condominium rules, and new energy standards, a misreading can cost tens of thousands of francs—or derail the transaction.

1. Property status and type of ownership

Before getting excited about an apartment with a view of the Alps or a house by the lake, you first need to understand what you are legally buying.

In Switzerland, a large portion of the residential market is organized as condominium ownership (PPE, or “Propriété par étages”), the equivalent of condominium ownership. In this system, the buyer acquires:

This structure is strictly regulated by the Swiss Civil Code (Articles 712a to 712t, supplemented by general co-ownership rules). The share—often expressed in thousandths—then serves as the basis for allocating all common costs: maintenance, repairs, collective heating, professional management, water supply, etc.

In a condominium (PPE), the buyer therefore never becomes the owner of “their building,” but rather a fraction of it, combined with an exclusive right to a defined area (the apartment and its dependent rooms).

Table – Main rights in a condominium (PPE)

Understanding this distinction from the outset is crucial: it determines what you can freely modify and what will require a vote of the community.

2. Co-ownership rules and voting rights

Every buyer in a condominium automatically becomes a member of the community of co-owners. This de facto association—with a certain legal autonomy, capable of taking legal action—manages:

– Day-to-day administration (via a professional manager or a co-owner).

– Maintenance and renovation of common areas.

– The annual budget and calls for funds.

– Internal regulations (use of common areas, living rules, etc.).

Several points deserve to be checked before purchase:

In practice, nearly 80% of Swiss condominiums have a renovation fund, funded each year as a percentage of the building’s insured value. Most associations contribute between 0.2% and 0.5% per year, with the national association of condominium owners recommending 0.3%. The earlier this fund has been built up, the more it reduces financial shocks during major renovations (roof, facade, heating).

3. Freedom to renovate inside the home

Legally, the buyer has fairly broad leeway within their apartment:

– They can reconfigure rooms, move non-load-bearing partitions.

– They freely choose interior fittings (kitchen, bathroom, finishes).

– They are responsible for maintenance and repairs of everything within their exclusive right.

A point often misunderstood concerns outdoor spaces:

– Gardens or rooftop terraces may remain common property, but be assigned for the exclusive use of a co-owner (exclusive enjoyment).

– The meeting may decide that the holder of this exclusive enjoyment bears sole responsibility for routine maintenance of that garden or terrace.

Before buying a ground-floor with garden or a penthouse with a large terrace, carefully read the regulations to determine if you are owner or merely beneficiary of a right of enjoyment, and who will pay for which work.

4. Allocation of ongoing costs and renovation fund

All co-owners share collective costs, but not all equally. The cornerstone is the value quota (value share) defined when the condominium is created, expressed in thousandths and registered in the land registry.

This value quota is used as an allocation key for:

In newer buildings equipped with meters, individual consumption of heating, water, and sometimes electricity is billed according to readings. In older buildings without detailed metering, a fixed key is used, often the value quota.

Table – Typical cost allocation keys in a condominium

The value quota can theoretically be modified (Art. 712e CC), but only if all directly affected parties consent and the meeting approves. In other words: very difficult in practice. Therefore, before purchase, it is crucial to check what quota is attached to the unit and whether alternative keys exist for certain costs.

5. Building energy status: GEAK / CECB, Minergie, and cantonal obligations

In Switzerland, a building’s energy efficiency is not a detail: it affects heating costs, subsidy opportunities, and increasingly, legal renovation obligations.

5.1 The GEAK / CECB certificate: the energy identity card

The cantonal building energy certificate is called GEAK in German and CECB in French. It is an official standardized document, recognized throughout Switzerland, issued only by certified experts.

This certificate evaluates: the skills and knowledge acquired in a specific field.

– The quality of the building envelope (insulation of walls, roof, floors, windows, thermal bridges).

– The overall energy balance.

– Direct CO₂ emissions.

The result is presented on two separate labels, each rated from A (highly efficient) to G (very poor):

– A score for the building envelope efficiency.

– A score for the overall energy efficiency, which accounts for the heating system and energy sources used.

Based on this, a prospective buyer obtains a realistic estimate of heating needs and can determine if thermal insulation work will likely be necessary in the medium term.

In most cantons, obtaining a GEAK is still optional, but several have already made this certificate mandatory in specific cases.

5.2 Cantonal obligations: Vaud, Fribourg, Jura, Neuchâtel, Basel-Stadt, Geneva

Rules vary greatly from canton to canton. Before buying, you must check what obligations the property is already subject to—or will be.

Some significant examples:

– Vaud

– The CECB is mandatory when selling an existing home and when replacing a gas, oil, or coal boiler.

– The requirement applies to individual or collective housing, as well as school and administrative buildings.

– A revision of the cantonal energy law plans to require renovation of buildings rated F or G within 10 to 15 years, subject to a facultative referendum.

– Jura

– CECB/GEAK energy diagnoses are also mandatory.

– Neuchâtel

– CECB mandatory for administrative, school, and residential buildings built before 1990, with more than 1,000 m² of heated area.

– For rental buildings, the requirement applies from 5 units connected to the same central heating system.

– Certain property transfers also trigger the obligation.

– Geneva

– The CECB is optional, but the canton applies a different system: the heat consumption index (IDC).

– Since 2023, every heated building must have an IDC, calculated in megajoules per m² of gross floor area per year.

– Buildings exceeding 450 MJ/m²/year must undergo an energy audit.

– Above 800 MJ/m²/year, energy renovations become mandatory, with the goal of reducing consumption below 450 MJ/m²/year within three years.

5.3 Minergie labels: comfort, efficiency, and future operating costs

Alongside cantonal certificates, Switzerland has developed the private Minergie standard, focused on comfort, energy efficiency, and climate protection. It is voluntary, with no direct legal basis, but very common in new builds and high-end renovations.

Several variants exist:

– Minergie (basic standard): any certified Minergie building achieves at least a GEAK class better than D.

– Minergie-P: standard for very low-energy homes, introduced in 2002.

– Minergie-A: standard for buildings with net zero annual energy balance for heating, hot water, ventilation, and auxiliary electricity (excluding appliances and lighting). It requires:

– a heat demand at least 10% below cantonal limits (SIA 380/1),

– a ceiling for non-renewable embodied energy of 50 kWhEPnren/m²/year,

– mechanical ventilation with heat recovery,

– energy-efficient fixed lighting.

In practice, a Minergie building will be more expensive to buy, but cheaper to operate, better positioned for future legal tightening, and more attractive for resale.

6. Rules on heating systems and CO₂

Swiss heating obligations are becoming stricter, without requiring everyone to immediately replace their system.

At the national level:

– No one is forced today to modify a still-functional boiler.

– Obligations apply mainly at the time of replacement of the heating system.

The Council of States decided that from 2023:

In most cantons, this principle is already applied: when replacing a boiler, at least 10% of the newly produced heat must come from renewable sources or be saved through efficiency improvements.

For a buyer, this means that: the acquisition of a product or service must meet specific needs and fit a value-for-money logic.

– Buying a building with an old fossil fuel boiler in a strict canton almost amounts to committing to financing a major conversion (heat pump, district heating, etc.) at the next replacement.

– Therefore, this constraint must be integrated into the long-term analysis and the calculation of financial viability.

7. Restrictions for foreigners: Lex Koller and quotas

For non-residents or nationals of third countries, Switzerland applies one of the most restrictive legislations in Europe regarding real estate ownership. The Lex Koller (Federal Act on the Acquisition of Real Estate by Persons Abroad) strictly regulates what “persons abroad” can buy.

7.1 Who is affected by Lex Koller?

In particular, the following are considered “persons abroad”:

– Non-residents without a Swiss permit.

– Third-country nationals without a C permit (and, in most cases, without a valid B permit).

– Companies controlled from abroad.

Conversely, certain profiles are completely exempt from Lex Koller:

– EU/EFTA nationals duly resident in Switzerland with a valid B, C, or L permit: they can buy like Swiss citizens, without authorization, whether for primary residence, secondary residence, rental, or commercial property.

– Holders of a C permit, regardless of nationality, are treated like Swiss citizens.

In between, the situation is more nuanced:

7.2 Non-residents: vacation homes under quotas

Non-residents without a Swiss permit are, as a general rule, prohibited from buying ordinary housing. Their only entry point remains:

– Buying a vacation home or an apartment in a tourist residence,

– Located in a designated tourist municipality (Verbier, Zermatt, St. Moritz, etc.),

– Subject to a national quota of approximately 1,500 authorizations per year, distributed by canton,

– With size limitations (habitable area often limited to 200–250 m² and land to about 1,000 m²),

– And a cap of one vacation home per family.

In tourist cantons with quotas, these can be quickly exhausted, especially in the most sought-after resorts. Before committing, it is essential to check with the notary or cantonal authorities whether contingents are still available.

7.3 Purchase contrary to Lex Koller: nullity and risks

If a person subject to Lex Koller buys a property without the required authorization (for example, a rental apartment in the city when they are not entitled), the transaction can be declared void. Consequences can go beyond mere restitution of the price, with possible criminal penalties.

To avoid these pitfalls, it is advisable:

– To have a notary or lawyer verify from the outset whether the buyer’s profile and the desired property type fall within the exceptions provided by law.

– To refuse any substantial down payment until the Lex Koller authorization question is clarified.

8. Acquisition costs: taxes, notary, land registry, mortgage

Switzerland does not have a “stamp duty” like in the UK, but cumulates several items that together quickly represent 2.5% to 5% of the purchase price, entirely borne by the buyer in most cantons.

8.1 Overview of typical costs

We can distinguish four main categories of mandatory fees:

Professional services associated (brokerage, legal advice, etc.) are subject to 8.1% VAT, but the residential sale itself is generally VAT-exempt.

8.2 Cantonal differences: Zurich, Geneva, Vaud, Valais…

The differences from one canton to another are considerable, especially for property transfer taxes.

Table – Example of acquisition costs for a property at CHF 1,000,000

LR = Land Registry, sometimes including fees related to the mortgage note.

In some cantons (Zurich, Uri, Glarus, Zug, Schaffhausen, Aargau, Ticino), conventional transfer taxes have been abolished in favor of simple administrative fees. But these, combined with notary fees and land registry costs, still represent a significant portion.

8.3 Mortgage notes and financing costs

When the purchase is financed by a bank loan, it is customary to create a mortgage note registered in the land registry, serving as collateral for the bank. This registration triggers additional fees, often in the range of 0.1% to 0.3% of the loan amount.

Banks also impose their own conditions:

– Minimum equity of 20% for residents, and often 35–50% for non-residents.

– Affordability test based on a theoretical interest rate of 4.5–5%, well above market rates, to ensure the budget remains manageable even if rates rise in the future.

9. Recurring tax burdens: property tax, wealth tax, real estate gains tax

Becoming a property owner in Switzerland also means accepting a recurring tax triplicate:

As a rough guideline, the total annual burden (property-related taxes) often hovers around 0.6% of the purchase price for an owner-occupier, but varies greatly by canton and municipality. For a house worth 1 million francs, this can represent a few thousand francs per year.

Non-residents remain subject to local taxes on their Swiss properties (real estate income, property-related wealth, capital gains on sale), even if they are not taxed in Switzerland on their other worldwide income.

10. Duty of inspection and construction defects

In construction matters, Swiss law imposes a very strict duty to inspect and notify defects. This primarily concerns new builds and major renovations, but the principle also applies to purchases of existing properties.

The legal basis is found in the Code of Obligations (CO) (Articles 367 to 371) and, if the contract refers to it, in the SIA 118 standard of the Swiss Society of Engineers and Architects.

10.1 Inspection and notification of defects

In a standard construction contract, the client must:

– Inspect the work as soon as possible after delivery.

– Immediately report any observed defect to the contractor.

For hidden defects that only appear later (roof leaks, damp walls, etc.), the CO provides a limitation period of 5 years for immovable works, extended to 10 years in case of intentional concealment.

The SIA 118 standard, frequently incorporated into construction contracts, provides:

Starting in 2026, amendments to the CO strengthen buyer protection by imposing a minimum 60-day period to notify defects, both apparent and hidden, from the inspection or discovery. This period cannot be contractually shortened.

For a buyer, this means it is advisable:

– To have a thorough technical inspection of the property (structure, envelope, installations) carried out by a specialist before the final signing.

– To document in writing any observed defect and keep a record (photos, registered letters).

11. Land registry, preemption rights, and encumbrances

The land registry (Grundbuch / registre foncier / registro fondiario) is the official and decisive source for everything related to property and encumbrances on a property.

It contains, among other things:

– The owner’s name and form of ownership.

– Servitudes and usufructs (rights of way, water rights, etc.).

– Recorded rights of preemption, purchase, repurchase.

– Mortgages and mortgage notes.

– Public law restrictions mentioned (e.g., construction reserves).

11.1 Preemption rights: priority for certain buyers

Swiss law distinguishes:

– Legal preemption right, which arises directly from the law (e.g., between co-owners, usufructuaries, building leaseholders, etc., Art. 682 CC).

– Contractual preemption right, established by a contract and registered in the land registry.

If the seller fails to notify, the beneficiary may, in some cases, still assert their right retroactively, if necessary by forcing the new owner to transfer the property to them.

In some cantons and situations (development zones, right to housing, etc.), legal preemption rights in favor of the state or tenants may exist, particularly in Geneva. It is therefore essential to check whether any preemption rights are recorded and who the holders are.

12. Comprehensive due diligence: legal, technical, environmental, tax

Unlike other countries, there is no “legal due diligence period” in Switzerland. As long as the deed has not been signed and authenticated before the notary, either party can withdraw without justification or compensation.

This means that all responsibility for verification rests on the buyer before signing:

– The seller has no general duty of disclosure, except in cases of fraud. Most contracts indeed exclude almost all liability for non-hidden defects.

A serious due diligence includes at minimum:

– Legal review

– Land registry extract and supporting documents.

– Verification of servitudes, encumbrances, preemption rights.

– Compliance with Lex Koller if applicable.

– Technical analysis

– Condition of the structure, envelope, installations (heating, electricity, elevators).

– Search for hazardous materials (asbestos, etc.) and probable hidden defects.

– Financial and tax analysis

– Market value assessment.

– Simulation of tax burdens (wealth tax, local taxes, real estate gains tax).

– Verification of operating costs and medium-term renovation needs.

Table – Order of magnitude of due diligence costs

Investing a few thousand francs in these preliminary checks can save much larger sums by avoiding a bad purchase.

13. Mortgage rates and financial sustainability

In recent years, the Swiss market has gone through a phase of rising and then easing interest rates. Since 2025–2026, the Swiss National Bank (SNB) policy rate has returned to 0%, after several successive cuts. Mortgage rates are currently at historically low levels:

– Fixed-rate mortgage (5 years): around 1.1–1.7% depending on the provider.

– Fixed-rate mortgage (10 years): around 1.4–2%.

– SARON-based mortgages (Swiss money market rate): often between 0.8 and 1.2% (including bank margin).

– Theoretical property charges (interest at 5%, compulsory amortization, maintenance estimated at about 1% per year) remain below one-third of the household’s gross income.

Many prospective buyers fail this test, even if they could easily afford the charges at current rates. It is therefore essential to simulate this sustainability before committing.

14. Specific risks for foreigners and common mistakes

Foreigners – especially non-residents – are more exposed to certain pitfalls:

Given these specifics, it is recommended to be particularly attentive to the following signals:

– Pressure to sign or pay very quickly.

– Absence of official documentation (registry extracts, GEAK, meeting minutes).

– Vague promises regarding immigration or taxation, not supported by Swiss sources.

15. Operational summary: your 25 points to check before signing

Without presenting them as a bulleted list, this process can be condensed into 25 concrete checks to integrate into any Swiss purchase project.

First, confirm your legal eligibility to purchase based on your status (Swiss, EU/EFTA, third country, resident, non-resident) and Lex Koller, accounting for local quotas for vacation homes and municipalities where any foreign purchase is impossible. Next, clarify the type of ownership: condominium (PPE) or individual property, with a fine understanding of the quota, exclusive rights, common areas, and resulting obligations.

On the legal side, it is essential to request a recent land registry extract, identify all servitudes, preemption rights, existing mortgages, and various annotations, and have everything reviewed by a professional if the situation seems complex. In a condominium, it is prudent to demand the regulations, meeting minutes from the last three years, details of the renovation fund, budgets, and charge statements, to gauge the backlog of work and future projects.

Finally, good due diligence involves reviewing existing contracts related to the property (rental leases if income property, maintenance contracts, etc.), checking for the absence of ongoing disputes or pending administrative proceedings, and clarifying from the start the role and independence of all parties: notary (neutral), broker, banker, technical expert, tax or legal advisor. Only once all these points have been checked, and the answers are satisfactory, does it become reasonable to consider signing the notarial deed.

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In Switzerland, real estate purchase is robustly regulated, which limits fraud like “stolen title deeds” but leaves a great deal of responsibility to the buyer to uncover hidden defects, future costs, and legal incompatibilities. By methodically following this 25-point checklist, integrating cantonal specifics and energy requirements, you transform a regulatory maze into a controlled path, and a property dream into a sustainably viable project—financially, legally, energetically, and tax-wise.

Cyril Jarnias

Cyril Jarnias is an independent expert in international wealth management with over 20 years of experience. As an expatriate himself, he is dedicated to helping individuals and business leaders build, protect, and pass on their wealth with complete peace of mind.

On his website, cyriljarnias.com, he shares his expertise on international real estate, offshore company formation, and expatriation.

Thanks to his expertise, he offers sound advice to optimize his clients' wealth management. Cyril Jarnias is also recognized for his appearances in many prestigious media outlets such as BFM Business, les Français de l’étranger, Le Figaro, Les Echos, and Mieux vivre votre argent, where he shares his knowledge and know-how in wealth management.

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