Thai law doesn't allow a foreigner to own land directly, which is why villa buyers are typically pointed toward one of two structures: a Thai limited company holding the land, or a long-term lease. Company structures carry real risk when they're set up as a pure workaround — using nominee Thai shareholders with no genuine capital stake is a pattern Thai authorities have scrutinized before, and a challenged nominee arrangement can put the whole ownership structure at risk. A properly drafted lease, by contrast, is a much more straightforward and legally recognized route — but "properly drafted" is doing a lot of work in that sentence, and not every lease contract offers the same level of protection.
Thai law permits leases of up to 30 years, and it's common for contracts to include renewal options extending that further — sometimes structured as 30 years plus additional 30-year renewal periods. The critical detail is that a renewal option is a contractual promise, not an automatic legal right under current law, so its strength depends entirely on how it's written and how enforceable it is if the original landowner changes.
Beyond the length of the lease itself, a handful of specific clauses make a meaningful difference to how protected a buyer actually is: clear rights to resell or assign the lease to someone else, provisions covering what happens to the lease if the leaseholder dies (so it can pass to heirs rather than simply expire), language addressing what happens if Thai law changes during the lease term, and confirmation that the lease will actually be registered at the local Land Department — an unregistered lease is far weaker than a registered one, regardless of what the contract says on paper.
None of this is a substitute for having an independent Thai property lawyer review the specific contract before you sign — lease structures are exactly the kind of legal document where a few missing clauses can matter enormously later, and generic advice (including this article) can't substitute for review of your actual paperwork. But knowing which protections to specifically ask about puts you in a much stronger position going into that review than assuming any 30-year lease is automatically as good as any other.