Real estate due diligence: essential checks before you buy

Transaction safety: Why is legal due diligence essential?

A real estate acquisition — whether it's an office space, a plot of land for development, or a commercial property — represents a major financial investment. In this field, the basic legal principle is Caveat emptor (let the buyer beware).

Once the sale-purchase agreement is signed, it becomes extremely difficult and costly to fix hidden problems. Legal due diligence is that thorough analysis which gives you the certainty that what you're buying is safe, legal, and free of any hidden “traps.”

🔍 The 4 mandatory areas of review before an acquisition

To eliminate risk, any due diligence process must check off the following:

1. Checking the owner and the property's “history.” It's not enough to check who the current owner is. You need to review the chain of title over at least the past 10–30 years (previous sales, donations, inheritances). If a single act in the past was unlawful, all subsequent acts — including yours — can be annulled in court.
2. Encumbrances, mortgages, and active litigation (land registry). The land registry extract is the property's “ID card.” It must be carefully reviewed to see whether the property is encumbered by bank mortgages, precautionary seizures, ongoing lawsuits (boundary or ownership disputes), or usufruct rights in favor of third parties.
3. Zoning status and permitted use (what you're actually allowed to build or do there). The biggest trap for developers or companies is acquiring land on which they later cannot build what they intended. Always request an informational Zoning Certificate. It will tell you the zoning indicators (land occupancy ratio, floor area ratio, height regime), any utility networks crossing the land (gas pipelines, high-voltage lines that create protection zones where building is prohibited), or whether the property is a listed historic monument.
4. Tax status and utilities. Make sure the seller provides a Tax Compliance Certificate showing that local taxes are paid up to date. In addition, for existing buildings, it's essential to verify there are no outstanding debts to utility providers or the homeowners' association, as well as the existence of an Energy Performance Certificate.