How do you draft a property purchase offer in Switzerland?

• What is a property purchase offer in Switzerland really worth?
• What should you check before making a purchase offer?
• How do you draft a property purchase offer without grey areas?
• How do you make a purchase offer on a flat or a house?
• How does a property purchase offer affect the mortgage?
• How do you withdraw an offer, handle a deposit and comply with the law?
• FAQ about property purchase offers in Switzerland

What is a property purchase offer in Switzerland really worth?

Offer, reservation, promise to purchase and notarised deed

The terms used by estate agencies do not always refer to identical documents. Before signing, distinguish between four levels:

• The purchase offer sets out your proposal: price, deadline, conditions and intended sale date.
• A reservation agreement generally provides for the property to be temporarily withdrawn from the market, sometimes in exchange for a payment.
• A promise to purchase or sell seeks to bind one or both parties to complete the sale at a later date.
• The notarised deed, prepared under the applicable notarial procedure, formalises the property sale and prepares the transfer in the land register.

Under Swiss law, both the sale of real estate and a promise to sell real estate must be notarised. A sheet signed at a kitchen table or an accepted email therefore does not replace the notarised deed. This does not mean, however, that everything preceding the notary is harmless. The heading at the top of the document matters less than its clauses: a “non-binding reservation” carrying a CHF 25’000.– charge deserves more attention than a short offer involving no payment.

Why an offer that has not been notarised can still be costly

In judgment 4A_443/2024, the Federal Supreme Court considered a written agreement concerning a property sale and a CHF 160’000.– deposit. It recalled that notarisation is a validity requirement for a promise to sell real estate and that, in that case, an agreement void for lack of form could not directly serve as a basis for provisional removal of an objection to enforcement. The dispute nevertheless did not disappear: the parties had to go to court to argue about the payment and its consequences.

The practical lesson is more useful than the legal formula: the absence of a notarised deed does not guarantee the absence of a problem. A property purchase offer may be accompanied by separate obligations concerning confidentiality, costs, delivery of documents, exclusivity or repayment of a deposit. Before looking into how to cancel a property purchase offer, it is better to know exactly what was promised, to whom the money was paid and in which circumstances it must be returned.

What should you check before making a purchase offer?

Calculate the capital actually consumed by the purchase

The first calculation should not be “How much can I offer?”, but “How much liquidity will this project consume?”. The price is only one part of the draw on your assets. Add together:

• the equity allocated to the price;
• the purchase costs and the cost of establishing the security, which vary by canton and transaction;
• work that must be paid for quickly and that the bank may not finance;
• the additional equity that would be needed if the bank valuation were below the price;
• the reserve you are unwilling to sacrifice after the keys are handed over.

This last amount is often forgotten. The property purchase offer should preserve this margin rather than absorb it by default. A household with CHF 230’000.– does not automatically have CHF 230’000.– of available equity. If it must pay CHF 30’000.– in costs, replace a heating system for CHF 35’000.– and retain a CHF 40’000.– reserve, the capital genuinely available for the price falls to CHF 125’000.–. A property purchase offer that ignores this arithmetic may be acceptable to the seller and damaging to the buyer.

Compare the property’s three values before proposing a price

To make a property offer methodically, compare three values:

1. The asking price, which reflects the seller’s objective.
2. Your economic value, taking account of the condition, work, timetable and usefulness of the property to you.
3. The lender’s probable value (the lending value), used to determine the financing and loan-to-value ratio.

These three figures may differ without any of them being absurd. A sound property purchase offer implicitly shows that you understand this gap. You may agree to pay CHF 950’000.– for a rare flat that the bank values at CHF 910’000.–. The problem is not necessarily the price; it is the additional equity that the difference requires. Drafting a purchase offer without estimating this gap is like negotiating the property before negotiating with your own balance sheet.

How do you draft a property purchase offer without grey areas?

The information that should appear in the document

To draft a property purchase offer, begin by identifying the property precisely: address, plot or unit number where known, ancillary areas, parking spaces, cellar and any movable items included. Then add the commercial conditions and timetable.

The purchase-offer documents and the proposal itself should answer the following questions without requiring interpretation:

• Who is buying and who is selling?
• Which property and accessories are included?
• What is the price and how will it be paid?
• Until what date and time does the offer remain valid?
• Which checks still have to be carried out?
• When are the notarised deed and handover of the keys envisaged?
• Must an amount be paid, to whom and under what repayment rules?

Also specify what happens if the seller accepts the price but changes another point, such as the transfer date. The property purchase offer must remain clear to the seller, the broker and the notary. An acceptance accompanied by a change should be treated as a counter-offer to be reviewed, not as an administrative detail. A property purchase offer concerns the complete transaction; the price alone is not enough to define your consent.

The financing condition in four parameters

The conditions precedent in the purchase offer must describe a verifiable event. The wording “subject to obtaining financing” is too imprecise to protect your project properly. A workable financing condition contains four parameters:

1. The amount: the minimum mortgage you require.
2. The deadline: the date by which the decision or confirmation must be obtained.
3. The evidence: a written refusal, the lender’s decision or another defined supporting document.
4. The bank valuation: the level below which the purchase would require too much equity.

Example: your proposal may be conditional on obtaining mortgage financing of at least CHF 720’000.– by a specified date and on a lending value that does not require more than CHF 190’000.– of equity to be allocated to the price. This wording covers a scenario that standard clauses overlook: the bank agrees to finance the purchase, but only if you add CHF 60’000.– that you do not wish to tie up.

A condition should not be copied mechanically. Its effect depends on the document and the transaction. Have the conditions of the property purchase offer reviewed by a legal professional when the proposal includes a deposit, penalty, exclusivity arrangement or genuine promise to purchase.

Use our mortgage calculator to simulate your property financing.

How do you make a purchase offer on a flat or a house?

Flat: buying the unit and the condominium’s decisions

To understand how to make a purchase offer on a flat in a condominium, do not limit your review to the inside of the home. You are also buying a share of the common areas and joining a community of owners. Ask for the accounts, budget, recent minutes, regulations, the position of the renovation fund and details of work that has been approved or seriously discussed.

A renovated flat may conceal a financially exhausted condominium. A façade, roof, pipes or communal heating system can shift tens of thousands of francs into your budget after the purchase. To make a coherent property purchase proposal, turn likely future cash calls into a price reduction, a liquidity reserve or a documentary-review condition.

House: separate the property price from the technical budget

The question of how to make a purchase offer on a house requires a different review. The land, the easements, boundaries, building rights, access, drainage, roof, building envelope and technical installations may affect your budget more than the quality of the kitchen.

Asking how to make a house purchase proposal first means separating the building price from the cost of bringing it up to standard. To decide how to make an offer on a house, prepare two figures: the price paid to the seller and the total cost of achieving the expected condition. A house listed at CHF 1’050’000.– with CHF 170’000.– of immediate work is not a CHF 1’050’000.– project. The bank may also exclude some of the work from its valuation or the initial mortgage. Making a house purchase proposal without separating these budgets distorts the price, equity and safety reserve at the same time.

How does a property purchase offer affect the mortgage?

The hierarchy of financing evidence

A simulation, preliminary assessment and credit offer do not prove the same thing. Before making a property purchase offer, place the document you have within this hierarchy:

• Simulation: indicative calculation based on declared data.
• Preliminary borrower assessment: initial review of your income, equity and debts.
• Property-specific confirmation: preliminary assessment incorporating information about the property.
• Formal credit offer: the lender’s proposal, including its conditions, reservations and validity period.

A certificate stating that you could buy for up to CHF 1’000’000.– does not mean that the bank will finance any property at that price. The property purchase offer should not treat the certificate as a final decision. The bank must still examine the value, quality of the security, work, location and sometimes resale prospects. The FINMA notably emphasises property-valuation and credit-default risks, as well as the treatment of applications falling outside institutions’ internal policies.

The role of a mortgage broker here is to prevent false equivalences. Two lenders may accept your income but assign different values to the same property. The best application is not merely the one showing an attractive rate: the value, loan-to-value ratio, amortisation, equity and timetable must be compatible with the property purchase offer you intend to submit.

Submit your request now to receive financing proposals suited to this exceptional market.

Worked example: when the accepted price exceeds the financed value

A flat is offered at CHF 940’000.–. You have CHF 220’000.–, of which CHF 35’000.– must cover costs and CHF 30’000.– must remain available after the purchase. You decide to offer CHF 920’000.– and plan a mortgage of CHF 736’000.–, equal to 80% of the offered price.

The bank nevertheless values the property at CHF 880’000.–. If it finances 80% of that value, the maximum mortgage is CHF 704’000.–. The CHF 32’000.– gap does not disappear: it is added to your equity. The capital available for the price rises from CHF 155’000.– to CHF 187’000.–, absorbing part of the planned reserve.

The right question is therefore not merely “Does the lender say yes?”, but “At what value and with how much capital tied up?” A property purchase offer containing an equity cap makes this risk visible before acceptance, rather than revealing it when the seller is already waiting for the notary date.

Are you preparing a proposal? Have your borrowing capacity, the probable bank valuation and the liquidity remaining after the purchase checked. A broker can arrange the preliminary assessment, present the same application to suitable lenders and help you set a coherent financing condition, without promising a rate or acceptance.

How do you withdraw an offer, handle a deposit and take account of current law?

The consequences of withdrawal depend on the stage reached

To understand how to cancel a property purchase offer, first identify the exact stage of the transaction: proposal sent but not accepted, acceptance received, reservation signed, deposit paid, notarised promise or deed of sale. The consequences are not the same.

Act immediately by a traceable means and do not merely write “I cancel”. A poorly withdrawn property purchase offer may leave a dispute over costs or the deposit. State the unmet condition or reason relied upon, request confirmation that the property is being placed back on the market and demand a written response about the deposit. The commitment created by a property purchase offer depends on its wording, form, the parties’ conduct and the accompanying obligations.

When a payment is requested, check its recipient, holder and purpose. A direct payment to the seller or an agency does not offer the same safeguards as a properly regulated escrow arrangement. The clause should state the repayment cases, repayment deadline and any deductions. A CHF 20’000.– penalty is easier to discuss before the transfer than after three lawyers’ letters: property already has enough square metres without adding a grey area.

Legal and political position as at 24 July 2026

Notarisation remains the standard for a property sale and promise to sell. The organisation of the notarial procedure, certain costs and documentary practices nevertheless remain shaped by cantonal law. A proposal concerning a property in Geneva, the canton of Vaud, Ticino or Zurich should therefore not automatically use the same timetable or transaction budget.

For persons abroad, the Lex Koller may require cantonal authorisation depending on residence, nationality, permit, use of the property and canton. The Federal Council opened a consultation proposing tighter rules, notably for certain third-country nationals and holiday homes. Buyers concerned should nevertheless clarify whether authorisation is required before drafting a purchase offer, because an authorisation condition may alter the timetable and credibility of the proposal.

FAQ about property purchase offers in Switzerland

Before sending your property purchase offer, have the two points that the seller cannot check for you reviewed: the amount of capital the transaction will actually consume and the value the lender may use. An affordability assessment and a discussion with a broker can turn an intention to buy into a financeable proposal, with understandable conditions and a defensible timetable.

Disclaimer: this guide provides general information about purchase offers, reservations, promises to purchase and mortgage financing in Switzerland. It is not legal advice, a credit offer or a financing guarantee. The effect of a document depends on its wording, form, circumstances, canton, property and the buyer’s status. Have binding clauses reviewed by a notary or lawyer and validate the financing with a qualified lender or mortgage broker.

Official sources consulted: Federal Supreme Court, judgment 4A_443/2024; FINMA, Supervisory Communication 02/2025; Federal Office of Justice, revision of the Lex Koller