Yes — and in Geneva more than elsewhere, for a reason few buyers know before signing: most sale deeds exclude the warranty against defects. You buy the property “as seen”; barring fraud on the seller’s part, what you discover after signing remains your responsibility. The pre-purchase survey is therefore not an extra precaution — it is your only real technical protection. Here is what it covers, when to have it done, what it costs and what it changes.
Technical survey or valuation survey: do not confuse the two
Two professions share the same word. The valuation survey answers “how much is this property worth” — that is the work of a valuation expert. The pre-purchase survey answers “what condition is it in”: structure, installations, risks. This is what we are discussing here, and it is carried out by an architect or an engineer. The two complement each other: technical condition informs value, and a major defect changes both.
Why it matters so much in Geneva
Swiss law protects the buyer against defects… through rules that Geneva deeds almost systematically set aside: the warranty exclusion clause is the norm, and it is valid — except for fraudulently concealed defects. The practical consequence: your protection will not come from the law after signing, it comes from the inspection beforehand. In a tight market where buyers are pushed to decide quickly, this is the point where you must never give ground.
Not inspecting also weakens your legal position
The survey is often presented as a commercial precaution. It is first and foremost a legal precaution, and for a reason rarely explained: the law does not protect those who did not look.
The principle works in two stages. On one hand, the seller is not liable for defects that the buyer knew about at the time of sale. On the other hand — and this is the part that stings — the seller is only liable for defects “which the buyer should have noticed themselves by examining the property with sufficient care” if the seller stated that they did not exist. A through-crack, a trace of damp in the basement, an electrical panel from another era: these are precisely the things a careful examination reveals. Not having seen them is not an argument; it is the one that will be used against you.
Then comes the timetable, equally unforgiving. The buyer must check the condition of the property received as soon as possible in the ordinary course of business, and notify the seller without delay if a defect for which the seller is liable is discovered. Failing this, the law is clear: the property is deemed accepted. For a genuinely hidden defect, one that usual checks could not have revealed, the clock starts again upon discovery — but it must then be reported immediately, under the same sanction.
The survey report therefore plays three roles at once: it tells you what you are buying, it puts figures on what can be negotiated, and it establishes what you examined — and therefore, implicitly, what you could not see. This last point is what matters on the day a defect appears: a professional’s written record makes the difference between “I didn’t notice anything” and “here is what was inspected, and what was not.” The details of remedies and their deadlines are in our guide on cancelling a sale.
What the expert inspects
- The structure — foundations, load-bearing walls, framework, roof: the items whose repair runs into hundreds of thousands of francs;
- the installations — electricity, plumbing, heating: their age and compliance dictate the schedule of works;
- the envelope and energy performance — insulation, windows, energy performance: the CECB (cantonal building energy certificate) gives the official snapshot, also valuable for anticipating renovation obligations;
- specific risks — damp, cracks, radon depending on the area, and for buildings predating 1991 the question of asbestos;
- compliance — permits for past alterations, visible easements: what the notary checks in law, the expert cross-checks on site.
Buying a PPE unit: the inspection changes scale
For a flat, the condition of the unit does not tell the whole story: you are also buying a share of the building. Three documents are worth a survey in themselves: the minutes of the last owners’ meetings — the works voted for and postponed can be read there —, the state of the renovation fund — a thin fund with a roof at the end of its life means a capital call is coming —, and the PPE (condominium) regulations. The expert, meanwhile, looks at the common areas that viewings ignore: roof, façades, boiler room, lift.
When to do it — and how to fit it into the offer
Ideally, inspect before committing. When the timetable does not allow it, there is a negotiable alternative: an offer subject to a technical inspection period, agreed with the seller. A serious seller does not refuse an inspection — a refusal is in itself information. And the report serves twice: it informs your decision, then it documents your financing file — the bank also assesses the condition of the security.
What it costs, what it delivers
Generally allow CHF 500 to 2,000 depending on the size of the property and the depth of the analysis. Relative to the price of a Geneva property, this is the cheapest insurance on the market: the report turns impressions into figures — and real quotes outweigh all arguments in a price discussion. Defects found can be costed, factored into the offer, and negotiated on facts.
Choosing the right expert — and buying well
An experienced architect or engineer, independent of the seller, familiar with Geneva’s building stock and documenting in writing: these are the criteria. We are happy to put our clients in touch with the right specialists — this is a step in the purchase process, not an optional extra. For the rest of your journey: properties for sale on the Left Bank, off-market listings to access properties before they are published, and the glossary for technical terms.