Every condominium building in Thailand has an invisible line drawn through it. Foreigners can own, freehold and in their own name, up to 49% of the building's saleable floor area. The other 51% must stay Thai. That single rule decides which unit you can register, what paperwork your bank has to produce, why identical floor plans sometimes carry two different price tags, and what your lawyer needs to check before you wire a single baht.
The rule itself is short. Its consequences aren't. Most horror stories from foreign condo buyers in Thailand trace back to the same mistake: assuming a deposit receipt meant the unit was theirs. It didn't. This guide covers where the quota comes from, how the arithmetic really works, how to verify what's left in a specific building, and what your options are when the building you want is already full. For the wider picture, including leases, usufructs and why land is off the table, read our guide on how foreigners can buy property in Thailand.
Where the 49% Rule Comes From
Thailand doesn't let foreigners own land. Condominiums are the carve-out. The Condominium Act B.E. 2522, passed in 1979, created a form of title that lets a foreigner hold a unit outright while the land underneath is owned collectively and run by a juristic person, the building's legal management entity. Section 19 of the Act lists which foreigners qualify to buy at all, and the aggregate cap, added by amendment as Section 19 bis, limits how much of any one building foreigners can hold in total. The point of the cap was political as much as economic: condos could open to overseas money without any single building, street or resort slipping entirely out of Thai hands.
The number wasn't always 49. The original ceiling was 40%. A 1999 amendment lifted it to 49% and even opened a temporary window for fully foreign buildings in Bangkok, which expired quietly in 2004. Since then the figure has held, though not for lack of debate: through 2024 and 2025 the government floated raising the quota to 75% in resort zones like Phuket and Pattaya, alongside a 99-year leasehold idea. As of publication, both remain proposals. No bill has passed. Buy on the law as it stands, not on rumors of what it might become.
One structural detail matters more than buyers expect. The quota is counted per building. Every registered condominium carries its own 49% ledger, so a developer's second tower next door can have plenty of room while tower one is packed full. Quota is a property of the building, never of the brand.
Floor Area, Not Unit Count
Here's the part that trips people up. The 49% isn't measured in units. It's measured in square meters of saleable floor area, added up across every unit in the building and compared against the area already registered to foreigners. Common property sits outside the calculation: lobbies, gyms, corridors, pools. Separately titled parking spaces, where a project has them, count in.
Run a simple example. A building holds 200 units with a combined saleable area of 10,000 square meters. Foreign freehold can cover at most 4,900 of those meters. If foreigners have already registered 4,650, the remaining quota is 250 square meters. A 65-square-meter one-bedroom still fits. A 280-square-meter penthouse doesn't, no matter how the unit count looks.
That's why one big penthouse eats more quota than two studios put together, and why counting sold units tells you nothing useful. Foreign buyers gravitate toward larger, higher-floor stock, so a building can look half Thai on a headcount and still be out of quota by area. Ask for square meters. Always.
One more wrinkle: developers sometimes cap foreign sales below the legal 49%, either to keep their Thai bank financing comfortable or to reserve foreign quota for the priciest stock. The law gives you the ceiling. The developer's own policy tells you what's actually on offer.
How to Check the Remaining Quota Before You Pay Anything
Three sources, in ascending order of reliability.
The sales office comes first. Any competent developer will hand you a written quota confirmation stating the current foreign percentage and the area your unit would consume. Get it dated and signed. But understand what it is: a snapshot from the seller's own records, not a promise the law will hold anything for you.
For a resale unit, the juristic person issues a foreign quota letter alongside the standard debt-free letter, and the Land Office won't register a foreign freehold transfer without both. These letters are only issued close to the transfer date and go stale within days, so the working pattern is a preliminary confirmation early and the formal letters at closing.
The Land Office record is the truth. Through your lawyer, you can have the building's registered foreign ownership checked directly against the official register. It's routine due diligence in Thailand and costs little. Skip it and you're trusting a salesperson's spreadsheet with the largest transfer of your year.
Now the trap, and it's the classic one. Quota is confirmed at the moment of transfer registration, not when you sign a reservation or hand over a deposit. Off-plan purchases stretch that gap to two or three years: you reserve in January, the tower completes in 2028, and in between dozens of other foreign buyers register transfers ahead of yours. Whoever registers first takes the quota. The date on your reservation form counts for nothing at the Land Office, and a building marketed hard in Shanghai, Moscow and Singapore can fill its foreign side long before handover.
The fix is contractual. Make the deposit conditional: if foreign freehold quota isn't available for your unit at transfer, the full deposit comes back. Not a credit toward another project, not an automatic conversion to leasehold you never asked for. A refund. Thailand's consumer protection board tightened developer contracts from 31 January 2025, banning automatic deposit-forfeiture clauses among other things, which strengthens your side of the table. The quota condition still has to be written in, though. Nobody inserts it for you.
Ask the seller to state in the contract that the unit is sold within the foreign quota and that failure to register foreign freehold entitles you to a full refund. A developer who hesitates over that sentence is telling you something useful.
When the Quota Is Full
Say the building you want has no foreign area left. Thai-quota units are simply not available to you as freehold; the Land Office will refuse the registration. Two honest routes remain, and one dishonest route worth naming so you can refuse it.
The first honest route is a registered lease. A foreigner can lease a Thai-quota unit for up to 30 years, recorded on the title deed at the Land Office. It's legal, it's common in Phuket and Samui, and it costs less than freehold. Be clear-eyed about the term, though. Contracts promising 30 plus 30 plus 30 years have circulated for decades, and in March 2025 Thailand's Supreme Court confirmed what careful lawyers had warned all along: pre-agreed renewal chains aren't property rights, they're personal promises. A renewal in year 30 depends on whoever owns the unit then, which may be the original seller's heirs or a stranger who bought the whole building. Price a 30-year lease as a 30-year asset, meaningfully below freehold, and treat any renewal clause as a hope rather than a plan.
The second route is simpler: pick another building. Thailand isn't short of condominiums. Quota pressure concentrates in a narrow band of stock, beachfront Phuket, central Pattaya, a handful of Sukhumvit corridors in Bangkok, the popular hillsides of Samui. Move 500 meters inland or one BTS stop over and buildings with open quota reappear, often at better prices per square meter. Browse the current listings with your requirements first and the specific tower second, rather than the other way around.
And the route to refuse: buying through a Thai company with nominee shareholders, set up purely so a foreigner controls Thai-quota property on paper. It's illegal, and the era of winking at it is over. Since mid-2025 Thai authorities have been investigating nominee structures at a scale the market had never seen, with prosecutions and forced disposals following. Whatever a helpful agent says about everyone doing it, don't.
The Resale Premium Nobody Mentions
The quota cuts both ways. It restricts you on the way in. Once you're inside it, it starts working for you.
In a building where foreign demand runs hot, foreign-quota freehold is a capped commodity. Only 49% of the floor area will ever be available to the entire global pool of foreign buyers, and new supply appears only when a foreign owner sells back to a Thai. The result is two markets inside one building: the same two-bedroom layout trades at one price as foreign freehold and a lower one as Thai freehold or leasehold. In Phuket and Pattaya, listings put "foreign quota" in the headline the way other markets advertise a sea view, and the gap widens in buildings whose quota sold out early.
Exit is clean, too. When a foreign-registered unit sells to another foreigner, the registration travels with the unit, so your buyer doesn't need fresh quota to exist. Your resale audience is every foreign buyer who wants that building, precisely the audience a Thai-quota seller can't reach. Leasehold runs the other way: every passing year shortens the remaining term, and the pool of buyers excited about a 19-year balance is thin.
None of this makes a foreign-quota condo a guaranteed win. Thai property has cycles, oversupply is a recurring theme in Pattaya and parts of Bangkok, and a premium paid at launch can take years to earn back. But between two otherwise identical units, the one inside the quota is the more liquid asset, and the market prices it accordingly.
The FET Form: Your Money Has to Come From Abroad
Quota isn't the only condition attached to foreign freehold. The same Section 19 framework requires the purchase money to enter Thailand from abroad, in foreign currency, and you have to prove it did.
The proof is the Foreign Exchange Transaction form, the FET. When you wire funds from overseas, the receiving Thai bank converts them to baht and issues an FET for any transfer worth 50,000 US dollars or more; smaller transfers get a bank credit advice letter, which the Land Office also accepts, so several mid-sized payments work fine. On transfer day the Land Office wants FETs or credit advices covering the full purchase price before it registers a foreign-quota freehold. No FET, no registration. This catches people who already hold baht in a Thai account or plan to pay out of local earnings; that money, whatever its pedigree, doesn't satisfy the requirement.
Three habits keep the paperwork clean. Send the money in foreign currency and let the Thai bank convert, because a transfer arriving pre-converted into baht may not generate an FET at all. Match the names: the sender or beneficiary should be the buyer who'll appear on the title deed, and if a couple is buying jointly, both names belong on the paper trail. And state the purpose in the transfer instructions, something like "purchase of condominium unit 12B, [building name]". Those same FETs matter years later, since they're the documents that let you repatriate the sale proceeds out of Thailand without friction when you eventually sell.
Due Diligence Before You Sign
The whole checklist for a foreign-quota purchase, compressed:
- Confirm the building is a registered condominium under the Condominium Act. An "apartment" or serviced residence without condo title has no foreign freehold to sell you.
- Get a written, dated quota confirmation from the developer, or a preliminary one from the juristic person for a resale.
- Have a lawyer verify the remaining quota and the seller's title at the Land Office, not just against sales-office records.
- Write the quota condition into both the reservation and the sale contract: no foreign freehold at transfer, full deposit back.
- Route every payment from abroad in foreign currency, with matching names and a stated purpose, and keep every FET and credit advice.
- For a resale, require the debt-free letter and the foreign quota letter from the juristic person at closing.
- For off-plan, check the developer's escrow arrangements and delivery record, and weigh how much quota risk a two-year wait adds in that particular building.
- Budget transfer-day costs, led by the 2% transfer fee, and agree in writing who pays what.
If Thailand is one of several markets on your shortlist, the HomeNSearch Thailand page puts prices, buying costs and live listings in one place, which makes the comparison quicker than a dozen agent calls.
FAQ
Can a foreigner really own a Thai condo outright?
Yes. Within the 49% quota, a foreign buyer holds freehold title in their own name, registered at the Land Office, inheritable and sellable like freehold anywhere. The cap applies to the building's total foreign ownership, not to your individual unit.
What happens to the quota when I sell my unit?
Sell to another foreigner and the foreign registration passes with the unit, so the building's percentages don't move. Sell to a Thai buyer and your square meters return to the Thai side, freeing quota for some future foreign purchase. That asymmetry is a big part of why foreign-quota units in sought-after buildings hold a premium.
Is a 30-year lease renewable?
Only if the owner at the time agrees to renew. Since the March 2025 Supreme Court ruling, renewal terms signed in advance count as personal promises rather than property rights, so a 30 plus 30 structure guarantees exactly 30 years. Value it, and price it, on that basis.
Do I need an FET form for a leasehold?
The Land Office doesn't demand one to register a lease, because the remittance rule attaches to freehold. Documenting your inbound transfer is still smart: it keeps the money trail clean and makes it far easier to take funds back out of Thailand when the lease ends or you assign it.