The condo due-diligence checklist: what to verify before you buy in Thailand

Why due diligence is the whole game

In Thailand the buyer carries the risk of a defective title or inherited debt — there is no broad consumer backstop that quietly fixes a bad purchase after the fact. Unpaid juristic fees attach to the unit, not the seller; foreign title can be refused at the Land Office if the quota is full; and money that didn't enter the country correctly can block registration. The good news is that almost everything that can go wrong is visible in advance if you look in the right places. This guide walks the checks in the order a careful buyer (or their lawyer) runs them. If you're still deciding whether to own at all, start with our renting vs buying guide, and for the full transaction flow see the step-by-step buying process.

Verify the Chanote (title deed) at the Land Office

A condo unit is held on a registered Unit Title Deed. The only version that matters is the one held at the Land Office — not the photocopy a seller or agent hands you. Have your lawyer pull the official record and confirm:

Re-check the title on or just before transfer day, because a clean record three weeks ago can change. Background on the deed system is in our Thai title deeds (Chanote) guide.

Confirm the 49% foreign quota — and get the letter

Foreigners can collectively own up to 49% of the total saleable floor area of a condominium building as foreign freehold. That allocation is finite and tracked unit by unit. Before you pay a deposit, get the foreign-ownership ratio letter from the juristic person stating the current foreign-held percentage and confirming your specific unit can be registered to a foreigner. Without it the Land Office will not register foreign title, and if the 49% is already full you'd be forced into a leasehold or a Thai-company structure you may not want. Never leave this to transfer day. The mechanics are in our foreign condo ownership & the 49% quota guide, and the ownership-form alternatives in leasehold vs freehold.

Demand a debt-free (no-encumbrance) certificate

This is the document the Land Office requires to transfer the unit, and it protects you from the most common inherited cost. The debt-free certificate is issued by the juristic person and confirms the unit has no outstanding common-area fees, sinking-fund arrears or other charges. Because unpaid juristic fees attach to the unit rather than the seller, buying a condo with arrears means you inherit the bill. Pair the certificate with the Land Office title check showing no registered mortgage, and only release the balance once both are in hand and dated close to transfer. If a seller stalls on producing a current debt-free certificate, treat it as a red flag.

Check the juristic person and common-area fees

The juristic person runs the building — its competence and finances become yours the day you buy. Ask for and review:

• Common-area fee rate — the monthly charge per square metre, and whether it has risen sharply or is unusually low (a sign of underfunding).
• Arrears on the unit — confirmed by the debt-free certificate above; arrears across the building also signal management trouble.
• Special assessments — any one-off levies recently raised or planned for major repairs.
• Building rules — pet policy, short-term-let restrictions and renovation rules that affect how you can use or let the unit; see short-term rental laws.
• Recent meeting minutes — the fastest read on disputes, deferred maintenance and how the building is actually run.

The fee structure itself is explained in our condo fees & sinking fund guide.

Read the sinking fund and the building's financial health

The sinking fund is the reserve for big-ticket repairs — lifts, facade, pumps, the pool, structural work. A well-funded reserve means those costs are covered; a depleted one means owners face special assessments, surprise lump-sum bills that can run to real money. Ask the juristic person for the sinking-fund balance, the annual common-area budget, the fee per square metre, and recent owner-meeting minutes. An older building with deferred maintenance and a thin reserve is a hidden liability you are buying into — price it in, or walk. This matters as much for a finished resale as for an off-plan purchase, where the building's track record won't exist yet.

Plan the FET (Foreign Exchange Transaction) paper trail

To register foreign freehold, the money for the purchase must enter Thailand in foreign currency and be documented on the Foreign Exchange Transaction (FET) form issued by the receiving Thai bank, stating the purpose as a condo purchase. Skip or mis-document this and the Land Office can refuse to register foreign title — even with a clean deed and a confirmed quota. Plan the transfer timing with your lawyer and bank before you remit funds, especially if the purchase is paid in stages. Full detail is in our FET form guide, and the wider remittance picture in sending money to Thailand.

The closing checklist — before you release the balance

Run this final pass with your lawyer in the days before transfer:

• Title re-checked at the Land Office, owner and unit confirmed, no new mortgage or seizure.
• Foreign-quota letter in hand, your unit confirmed registrable to a foreigner.
• Debt-free certificate current and dated close to transfer day.
• FET form(s) issued for the full foreign-currency amount, purpose stated correctly.
• Transfer costs agreed and split — model them with our transfer fees guide and the purchase-cost calculator.
• Lawyer attending the Land Office transfer — engage one via hiring a lawyer in Thailand.

Frequently asked

Sources & References

• Department of Lands, Thailand

Primary and official sources are cited above. Government rules, fees and procedures in Thailand change over time and vary by office; always confirm current requirements with the relevant authority before relying on them. BAANLYY never takes paid placement in editorial content.