The biggest one remains taking legal advice from the other side. The seller is paid only if the sale goes through, which is a different interest than protecting the buyer. Your own legal adviser costs a small fraction of the purchase and remains the best protection.
Putting your name to untranslated contracts comes a close second. An official translation costs little set against what is at stake. Verbal assurances will not help once a dispute starts — only the signed text matters.
Buying off-plan without checking the developer has wrecked many budgets. Before paying anything, examine the developer’s completed projects, the construction licences, and the guarantees on staged payments. Projects running behind schedule happen frequently with even the best developers; abandoned sites are rarer but much more damaging.
Forgetting about resale is a quieter mistake. Every purchase will eventually be sold, and the pool of future buyers matters. A unit attractive only to a narrow group takes longer to sell in a weak market.
Finally, desemealti property prices plenty of purchasers misjudge the ongoing obligations. Local tax returns can be required even when the home sits empty, and late filings attract charges that grow over time. Putting buy property in blizikuce place a local tax adviser from the start avoids most of it.