How long is my offer to purchase a home legally binding?

The legal reality: When an offer is truly binding

To answer the question of binding effect, we must consult the Swiss Code of Obligations (CO). A legally binding offer to purchase a home almost never exists in the early stages.

The formal requirement: The protective barrier of Art. 216 OR

The most important paragraph for every real estate buyer is Article 216 of the Swiss Code of Obligations. It states that purchase agreements for real estate require public notarization to be valid .

• What this means is: As long as you haven't been to a notary and signed, no contract has been formed.
• The consequence: A written offer via email, WhatsApp or letter is not valid. A binding purchase offer for a home that can compel you to buy it. The seller cannot sue you for fulfillment (i.e., payment of the purchase price and taking possession of the house).
• The downside: The seller isn't bound either. Even if they accept your "binding offer to buy your home" in writing, they can sell the house to someone else five minutes before the notary appointment.

The limited-time offer: Psychology instead of legalities

Real estate agents often require a written offer with a validity period (e.g., "valid until next Friday").

Does this then constitute a binding offer to purchase a home ?

• Legally: No. Even with a deadline, the formal invalidity (lack of notarization) is not remedied. You could theoretically withdraw even before Friday.
• Morally speaking, it signals commitment. By setting a deadline, you give the seller a framework. If they let the deadline pass, you are morally and negotiatingly free to move on. A binding purchase offer for a home with a deadline is more likely intended to put the seller under pressure to make a decision.

The reservation agreement: A "binding" construct?

A reservation agreement is often drawn up between the initial offer and the notary appointment. A deposit is paid at this stage.

Many believe that signing and making payment creates a binding offer to purchase a home .

• The misconception: Even the reservation agreement is formally invalid without notarization, insofar as it concerns the obligation to purchase.
• The reality: It's more of a legally binding offer to purchase a home, a "lite" version. It usually only stipulates what happens to the deposit if the deal falls through. You can still withdraw from the purchase, but you might lose part of the deposit to cover expenses already incurred. It's not a genuine, legally enforceable offer to purchase a home .

Culpa in Contrahendo : The exception to liability

Is there absolutely no risk? Yes, there is. If you behave as if the binding purchase offer for the home is a done deal, and induce the seller to incur expenses, the "culpa in contrahendo " (fault in contract negotiations) applies.

• Example: You have the notary draw up a draft purchase agreement, order expensive changes to the building plans, and repeatedly assure the seller that everything is in order. Then, the day before the notarization, you cancel without a valid reason.
• The consequence: You don't have to buy the house (it wasn't a legally binding offer to purchase a home ), but you must compensate the seller for the resulting damages (notary fees, legal fees). Your behavior created trust that was subsequently betrayed.

How long am I bound if I say nothing?

If you make an offer without specifying a deadline ("I offer 1 million."), how long does this binding offer to purchase a home remain valid ?

• In person (phone/conversation): You are only bound for the duration of the conversation. If the salesperson doesn't immediately say yes, you are free.
• For offers made remotely (email/letter): You are bound for as long as a response can be expected under normal circumstances (a few days). However, even here, since there is no formal requirement, the word "bound" is relative when it comes to a legally binding offer to purchase a home . You can withdraw at any time, as long as no notary is involved.

Strategy: How to formulate correctly

To avoid misunderstandings, you should formulate your offer clearly.

• Financing clause: Always include the following: "This binding offer to purchase a home is subject to a positive financing commitment from my bank." This gives you a clear way out.
• Clarity: Make it clear that this is a declaration of intent that is intended to culminate in a notarized contract.

This way you appear professional and signal seriousness without making yourself legally vulnerable should unforeseen events occur. A conditional binding offer to purchase a home is your safety net.

Conclusion

The question "How long is my purchase offer legally binding?" can be answered clearly from a legal perspective: Not at all, until the notary affixes their seal. A legally binding written or oral purchase offer for a home is, under Swiss law, a "paper tiger." It cannot force you to buy the property.

Nevertheless, you shouldn't make offers lightly. A binding offer to purchase a home is your ticket to negotiations. Constantly making and withdrawing offers erodes credibility with real estate agents and banks. Consider your offer a morally binding commitment to buy your home . Only sign once you have secured financing and are absolutely certain. Use deadlines to guide the process, but don't lose sleep over the fear of a lawsuit regarding the purchase – this risk is practically nonexistent in Switzerland before the notary appointment.

If you want to ensure that your written binding offer to purchase your home is professionally formulated, or if you need support with setting tactical deadlines, Loft offers templates and expert knowledge for your negotiation success.

Glossary

• A legally binding offer to purchase a home: In the strict legal sense, this does not exist before notarization. Colloquially, it refers to a written declaration of intent to purchase addressed to the seller.
• Public notarization: The formal act at the notary's office, which is absolutely necessary for a real estate purchase agreement (and thus the binding offer to purchase a home ) to become legally valid.
• Article 216 of the Swiss Code of Obligations (OR): The legal article that regulates the formal requirements for real estate transactions and stipulates that informal contracts are void.
• Culpa in contrahendo : Liability for damages if one breaks off contract negotiations in bad faith, even though one has signaled a quasi- binding offer to purchase a home .
• Financing reservation: A clause in the offer that makes its validity dependent on the bank approving the mortgage.