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26. April 2026

The Seven Costliest Mistakes When Selling Property — and How to Avoid Them

Detailaufnahme einer professionell aufbereiteten Immobilie

The most common — and at the same time most costly — mistake in a property sale happens right at the start: owners set a price that has less to do with market reality than with their own emotional attachment. But that's only one of several typical pitfalls we regularly observe from fifteen years of industry experience.

Mistake 1 — An Inflated Starting Price

Owners associate memories, personal stories, and a high sentimental value with their property. If the asking price is set by gut feeling or rough estimates from acquaintances instead of a sound market valuation, the marketing starts with a false initial premise. The result: long time on market, price reductions, declining buyer interest.

Mistake 2 — Poor Presentation

The impact of a professional presentation is often underestimated. Pixelated photos, unflattering angles, missing visualizations, and a carelessly written listing hurt reach more than they appear to at first glance. First impressions decide — in the online world, within a matter of seconds.

Mistake 3 — No Marketing Strategy

Listings on portals are no substitute for strategy. Without a defined target audience, price positioning, timing, and a clear line of argument, marketing turns into reacting to inquiries — instead of actively steering the process.

Mistake 4 — Unstructured Viewings

Anyone who lets every inquirer view the property burns time and devalues it. Serious prequalification (creditworthiness, financing confirmation, genuine intent to buy) separates browsers from real potential buyers.

Mistake 5 — Incomplete Documentation

Land register extract, building plans, condominium regulations, proof of insurance, energy certificate — if individual documents are missing, negotiations are delayed or fail altogether. A properly prepared data room before marketing begins is standard practice, not a luxury.

Mistake 6 — Poor Negotiation

Negotiations are not defensive battles. Anyone who merely defends their first move instead of actively steering it gives up negotiating room. Professional negotiation understands the motivations of both sides and guides them to a clear close.

Mistake 7 — Bringing in Expertise Too Late

Many owners only seek advice once the sale has already stalled. By then, corrections are laborious and expensive. Anyone who plans with expertise from the start avoids most of these mistakes entirely.

FAQ

An excessively high starting price that isn't based on a sound market valuation.

Typically 3–6 months in German-speaking Switzerland. Longer time on market signals to buyers that something is wrong with the property.

Before setting the initial price — not only after marketing attempts have already failed.

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