Off-Plan or Ready-Built Property in Thailand: How to Choose

The short answer depends on two things: when you need the property, and how you will pay for it. If you want to use it or rent it out soon, a completed building — or a project close to handover — removes most of the waiting and much of the uncertainty. If your money arrives gradually and you are after one particular unit, buying off-plan from a carefully checked developer can fit better. The rest of this guide explains that trade-off from the point of view of someone buying from abroad.

This guide is general information, not legal, tax or investment advice. Contract terms differ between developers and projects, and laws and procedures change. An independent Thai lawyer should review your contract, and a tax adviser in the country where you pay tax should look at the tax side.

What you actually own at each stage

Marketing language blurs a distinction that matters. When you buy off-plan — at presale or while the building is going up — you sign a sale and purchase agreement with the developer and pay in instalments. Until the unit is registered in your name at the Land Office, what you hold is a contractual claim against the developer, not a registered property. In that period, your protection is the contract and the company behind it.

When you buy ready-built, the building already exists and registration follows once you have paid. You buy either from the developer, who still has unsold units in a completed building, or from a private owner on the resale market. Either way you are buying something you can walk through, and ownership passes on registration.

That single difference — a contract on one side, a registered unit on the other — explains almost everything else in this comparison.

Five questions that usually settle it

Rather than asking which option is better in general, run through these five with your own plans in mind.

When do you need to use the property? If the goal is next season in Thailand, a move on retirement or rental income as early as possible, the time to completion works against you, and any delay pushes everything further back. A ready-built unit, or a project already near handover, fits a fixed date better. If you have no fixed date, waiting costs you less.

How will you fund it? Off-plan spreads payments over the construction period, which suits buyers whose money comes in gradually — from savings, a bonus or the planned sale of another property. A ready-built unit needs most of the price within a short period, so the funds must already be in place and your international transfers lined up for registration day.

How much can you check from where you live? From abroad, an off-plan project reaches you as renderings, floor plans, progress photos and the occasional site visit. With a completed building, you — or someone you send — can inspect the actual unit, the shared areas and the way the building is run. If you cannot travel, a ready-built purchase is easier to verify. If you visit Thailand regularly, following a construction site becomes much more manageable.

How firm are your plans? Leaving an off-plan contract early is sometimes possible, but it depends on the developer and the contract, and nobody can promise you a buyer. A registered unit is simpler to sell. If your job, family or residency plans could change before completion, weigh that honestly before you commit.

Do you want one particular unit? A high floor, an unobstructed view or a corner layout is easiest to secure early, when most units are still available. Early buyers may also benefit from early-stage pricing, because developers tend to revise prices as construction progresses and stock sells — but whether that happens, and by how much, varies from project to project, and nobody can promise it. In a completed building you choose from what is left, which can mean compromising on floor or orientation.

What can go wrong off-plan

None of these is a reason to rule out off-plan. Each is a reason to read the contract before you sign:

• Late completion. This is the risk buyers meet most often. It delays your first stay, your first rental income and your final instalment. What you are entitled to depends mainly on the contract: the completion date, the grace period and the remedies after it.
• Specification changes. Finishes, appliances, facilities and even the unit's area can end up different from the brochure. A detailed specification attached to the contract, and a clause on area differences at handover, are your safeguards.
• Renderings are not surroundings. A picture will not show what gets built next door, how much afternoon sun the living room receives or how loud the road is at night. Ask for the neighbourhood to be filmed, not just the sales office.
• Currency exposure. Every instalment is converted into baht, so your cost in your own currency is only known once the last payment has been made.
• A stalled project. Rarer than a delay, but more serious. Thailand has no general compulsory scheme that returns off-plan buyers' money if a project stops, so the choice of developer matters more than any single clause.

How to check a developer's track record, land and permits is set out in our developer due diligence guide; how instalment schedules work and what to ask about the contract and escrow, in the payment plans guide. Most of that work is done before the reservation deposit, not after it.

What can go wrong with ready-built

A completed building takes construction risk off the table, but risk does not disappear. It moves to the unit, the building and the paperwork.

Defects come first. Damp, cracks, plumbing, electrics and air conditioning deserve a proper inspection, and if you cannot be there an independent inspector can do it for you. Agree in writing which furniture and appliances are included, rather than relying on what was said at the viewing.

The building comes second. You can see how it is maintained, what the common fee is and how the juristic person — the owners' body that runs a condominium — reports to owners. Ask for its recent reports and look at the state of the pool, lifts and corridors yourself.

With a resale unit, the seller becomes part of the check. The unit must be registered in their name, free of encumbrances and of unpaid fees owed to the building, and eligible for registration to a foreign buyer within the foreign quota. Your lawyer confirms this before you pay a deposit.

Finally, a ready-built purchase compresses the timetable. Legal review, inspection and tax advice all have to happen before signing, without the time to completion that an off-plan buyer has to sort things out. What happens at the handover inspection is covered in our handover guide, and what the unit costs to hold afterwards in the ownership costs guide.

Money from abroad: the same rule either way

Whether you buy off-plan or ready-built, registering a condominium unit in your own name as freehold requires the purchase money to come from abroad in foreign currency, with the Thai bank's confirmation of the inbound transfer. For an off-plan buyer, that applies to every instalment. For a ready-built buyer, it means one large transfer that has to arrive and be documented before registration day. The details are in our money transfer guide and the foreign ownership guide.

Selling before completion, and buying resale

Some buyers come in early planning to sell before the building is finished. This is done by assigning the contract: a new buyer takes your place with the developer and continues the payment schedule — and if they are a foreigner, brings their own funds from abroad. Whether you can do this depends on the contract. Some prohibit assignment, some permit it once a certain share of the price is paid, and some charge a fee. There is no organised market for assignments, and you may find yourself competing with the developer's own unsold units in the same building. An assignment can also have tax consequences in Thailand and in your country of residence, so ask before you buy, not when you come to sell.

Going the other way, a resale unit in a finished building lets you buy something already lived in, at a price negotiated with the owner rather than taken from a developer's price list. Our catalogue focuses on developer projects; if you are after a resale unit in a particular building, ask your manager what is possible. Selling after completion and taking money out of Thailand are covered in our resale and exit guide.

Reading project status on our site

When the construction status is recorded in our database, it appears on the project page and the catalogue card. Presale means sales are open but construction has not really started. Under construction means the structure is going up. Completed means the building is finished, and the developer may still have units for sale. Sold out means the developer has sold every unit, though owners may resell. On hold means construction or sales have stopped — a reason to ask why and to check thoroughly before paying anything.

If the completion quarter and year are recorded, the page also shows a planned completion. That is the developer's plan, not our promise and not necessarily the date in your contract: what binds the developer is the contract date together with its grace period. Statuses are updated from developer information, so your manager confirms them with the developer before you decide.

In the project catalogue, the Status filter lets you tick Presale, Under construction or Completed, alone or together. Where completion dates are recorded, there is also a Completion filter by year and a Completion: soonest sort. Projects without a recorded date drop out of a year filter, so it is worth looking without it too.

How ROMA ThaiProperty helps

We confirm a project's status and planned completion with the developer, request recent site photos and the draft contract, and explain in plain English what it says about delays, changes and assignment. Where needed, we can recommend an independent Thai lawyer. The decision between off-plan and ready-built is yours; our job is to make sure the right questions are on the table before you make it.

Where to go next

Still comparing destinations? Start with Pattaya, Phuket or Bangkok. Planning to buy without travelling? See our guide to buying remotely. Intending to rent the unit out while you are away? See the rental management guide.