Buying off-plan on Koh Phangan: the upside, the risks, and how to vet a developer

Buying off-plan means buying from the developer before or during construction. On Koh Phangan that's how most new villa and condo projects are sold. The appeal is real — but so are the risks, and the difference between a good off-plan buy and a bad one is almost entirely in the due diligence.

Why people buy off-plan

A lower entry price than a finished unit, payments spread over the build rather than all at once, first pick of the best units, and the chance of appreciation by the time it completes. For the right project and buyer, that's a strong combination.

What you're actually taking on

You're buying a promise of a finished building, which adds risks a completed property doesn't carry: construction delay or non-completion, a developer running out of money, the finished spec not matching the renders, and — underneath it all — the same foreign-ownership reality. The unit is still held as leasehold plus ownership of the structure (see Leasehold vs freehold), and the project still sits on a piece of land with its own title.

Off-plan due diligence — beyond the usual checks

• The developer's track record — projects they've actually finished and handed over, not just renders and a brochure.
• The land title under the project — what the development is built on, checked the same way as any plot. See Land titles.
• Building permit and zoning — that the project is legally permitted at this location and scale under the 2025 environmental rules. See Building zones.
• Your unit's legal structure — exactly how the lease and building ownership are registered to you on completion.
• A staged payment schedule tied to construction milestones — not the full price up front — and what happens to your money if the developer fails (escrow, guarantees).
• The contract — completion date, penalties for delay, the handover and snagging process, and precisely what the spec includes.

On Koh Phangan specifically

The island's new-build market is small, with relatively few large developers, so a track record is easier to verify — and more important when it's thin. The 2025 environmental zoning also constrains what can be built where, so confirming a project's permits is not a formality here; it's central. A beautiful render means nothing if the project can't legally be completed as drawn.

How to keep the risk down

Pay in stages against real construction progress rather than a large amount up front, use escrow where it's available, favour a developer who has completed comparable projects, and have an independent lawyer review the contract before you sign anything. The overall journey is the same as any purchase — see the step-by-step buying process.