The costliest error is taking legal advice from the other side. The developer gets a commission when the deal closes, which is not the same as acting for you. An independent lawyer represents a small fraction of the purchase and is the single best safeguard.
Signing documents you cannot read comes a close second. A sworn translation costs little set against the sum being committed. Promises made in conversation carry no weight once a dispute starts — only the signed text matters.
Buying off-plan without checking the developer has wrecked many budgets. Before any payment, review previous developments, the construction licences, and how deposits are protected. Delays are common with even the best developers; stalled projects are the exception but genuinely ruinous.
Thinking only about the purchase is less obvious but just as costly. Every purchase will one day be sold, chlorakas real estate and the resale market matters. A ungasan property prices that only appeals to foreign buyers is harder to move when conditions change.
Last of all, a lot of buyers underestimate the running costs. Local tax returns are often required even when the home sits empty, and missed deadlines generate penalties nobody warns you about. Putting in place a local tax adviser at the outset heads off the majority of these headaches.