Selling property in Switzerland: legal pitfalls owners should know
A buyer has been found and the sale price has been agreed. It may seem that the hardest part of selling the property is over.
In reality, however, a phase now begins in which mistakes can become costly for owners. Financing, the reservation agreement, the purchase contract, known defects, the land register and property gains tax should all be clarified before ownership is finally transferred.
Anyone wishing to sell a house or apartment in Switzerland should therefore not focus solely on achieving the highest possible sale price.
1. A purchase commitment does not yet mean the purchase price is secured
A prospective buyer may reserve a property or give a verbal commitment without this already ensuring that the financing will work out.
Especially when property prices are high, the purchase often depends on the definitive financing approval of a bank.
For sellers, it is therefore crucial to check the buyer’s ability to pay in good time.
In its current guide, Swiss Life points out that an irrevocable promise to pay from a Swiss financial institution can provide the seller with the necessary security.
This reduces the risk of the sale failing shortly before completion because the financing ultimately does not come through.
2. The property purchase contract must be publicly notarised
Selling real estate in Switzerland does not work like selling an ordinary object.
Under Art. 216 of the Swiss Code of Obligations, purchase contracts for land and property require public notarisation to be valid.
In addition to the actual purchase price, the purchase contract regulates many other points.
These may include, for example:
- payment terms
- date of transfer of ownership
- handover of the property
- fixtures and fittings sold with the property
- existing easements
- benefits and risks
- known defects
- costs and fees.
Owners should therefore review the draft contract carefully and clarify any uncertainties before notarisation.
3. Do not simply conceal known defects
The condition of a property has a significant influence on its value.
This is especially true for older single-family houses and condominiums.
Issues such as moisture, damage to the roof or façade, known contaminated sites or other substantial defects should be handled correctly during the sales process.
An apparent advantage gained by concealing a problem can later lead to conflicts with the buyer.
That is why the following should be clarified before marketing begins:
Which defects are known, which documents exist and which information should be disclosed to potential buyers?
Clean and transparent sales documentation not only creates security here, but can also increase the trust of prospective buyers.
4. Calculate property gains tax before selling
One of the most important financial questions is sometimes considered rather late by owners:
How much of the sale proceeds will actually remain after taxes?
Anyone who sells a property at a profit in Switzerland must generally expect to pay property gains tax.
The federal government’s official information platform confirms that capital gains from the sale of a house, apartment or plot of land are taxed in all cantons. The level of taxation depends, among other things, on the canton and often also on the length of ownership.
It is not simply the difference between the original purchase price and today’s sale price that counts.
Certain value-enhancing investments and other deductible costs may be relevant when calculating the taxable property gain.
It is therefore worth keeping invoices and receipts for investments in the property.
5. The length of ownership can make a big difference
Property gains tax is regulated at cantonal level.
In many cantons, a short-term real estate gain is taxed more heavily than a gain achieved after a long period of ownership.
The federal government points out that in most cantons the tax burden decreases as the length of ownership increases.
Especially if an owner is already considering whether to sell this year or next year, an early tax calculation can therefore be worthwhile.
However, the optimal time to sell should not depend solely on tax considerations.
Market price, demand, the mortgage situation and personal plans also play a role.
6. Replacement purchase can allow a tax deferral
Anyone who sells their owner-occupied home and subsequently acquires another owner-occupied residential property may, under certain conditions, benefit from a deferral of property gains tax.
This does not mean that the tax disappears permanently.
It is generally deferred.
The specific requirements and deadlines must be checked at cantonal level. Particularly when moving from the previous house to a new apartment, or vice versa, this topic should therefore be clarified early with the competent tax authority or a specialist.
7. The right sale price remains central
Legal security is important, but it does not replace a realistic pricing strategy.
A price that is too low can cost owners a lot of money.
A significantly inflated price, on the other hand, can mean that a property remains on the market for a long time and that price reductions become necessary later.
Before the start of the sale, there should therefore be a well-founded market value assessment.
It is worth considering various factors:
- properties that are genuinely comparable
- current demand in the municipality
- micro-location
- plot size and living area
- condition
- renovation needs
- fit-out standard
- special features of the property.
For sellers: do not compare only estate agent commissions
Anyone who wants to appoint an estate agent should not ask only:
“How high is your commission?”
Questions such as the following are at least as important:
What sale price does the agent consider realistic?
How is this price justified?
What marketing strategy is proposed?
How are prospective buyers and their financing checked?
Who supports the purchase contract, notary process and transfer of ownership?
An apparently inexpensive agent is not automatically the best economic choice if the pricing strategy or marketing does not suit the property.
Several estate agent offers create comparability
Precisely because real estate sales are complex, it can make sense for owners not to speak with just one provider.
This makes it possible to compare which agents would like to take on the property, how they assess the sale and which conditions they offer.
The decision remains with the owner.
Checklist before the sale
Before a property is definitively sold, owners should in particular have clarified the following points:
- Has the property value been assessed realistically?
- Is the buyer’s financing secured?
- Are all relevant documents available?
- Are known defects documented?
- Have easements and land register entries been checked?
- Is the approximate property gains tax known?
- Has a possible replacement purchase been considered?
- Are handover and payment terms clearly regulated in the purchase contract?
The earlier these questions are answered, the lower the risk of unpleasant surprises shortly before completion.
Conclusion
A successful property sale does not end with a buyer’s commitment.
Between the offer and the transfer of ownership lie some of the most important steps in the entire sales process.
In particular, proof of financing, purchase contract, defects, land register and property gains tax deserve attention.
Anyone who clarifies these points early while also comparing the market value and various marketing options creates a much better basis for a well-informed sales decision.
Sources
Sources
Swiss Life, “Selling property: legal pitfalls you should know”, 3 September 2026. Swiss Life
Swiss Confederation / ch.ch, information on the taxation of real estate and property gains. ch.ch
Swiss Code of Obligations, Art. 216 – form requirements for the purchase of real estate.