Property Due Diligence Checklist for Buying in Thailand

The title, paperwork, and physical checks to run before you sign

Updated August 2, 2026·8 picks

Skipping due diligence is the single most common way buyers in Thailand end up with an expensive surprise — an unregistered lien, an overstated common-area fund, or a title deed that isn't what it appeared to be. None of these checks are exotic; they're standard practice for a careful buyer anywhere, adapted to how Thai land records and condominium law actually work. Work through them in order before you sign anything binding.

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1

Identify the Title Deed Type

Thai land titles come in several grades, and the grade determines what rights you're actually buying. Chanote (Nor Sor 4 Jor) is the strongest and most common for condos and developed land — it's precisely surveyed and gives full, transferable ownership rights. Lesser titles like Nor Sor 3 Gor carry more restrictions and weaker survey accuracy. Ask your agent or lawyer to confirm exactly which grade applies before you get attached to a property.

Chanote (Nor Sor 4 Jor) is the strongest, most precisely surveyed title
Lesser title grades carry more restrictions and weaker boundary accuracy
The title grade determines what rights actually transfer at sale
Confirm the exact grade in writing before you get emotionally invested

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2

Search the Title at the Local Land Office

A title search at the Land Department office where the property is registered pulls the official record: the current registered owner's name, the exact land/unit dimensions, and any notations attached to the title. This confirms the seller is who they say they are and that the property matches what's being marketed — a mismatch here is a reason to stop and ask questions before going any further.

Pulls the official registered owner name and exact dimensions
Reveals any notations attached to the title record
Confirms the seller matches who they claim to be
A mismatch here is a hard stop until it's explained

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3

Check for Liens, Mortgages, and Encumbrances

The back of the title deed (or its digital equivalent) lists any registered mortgage, lien, court injunction, or usufruct attached to the property — these transfer with the land unless cleared before your purchase. If a mortgage shows up, standard practice is for the seller to pay it off and have it deregistered at or before transfer, using proceeds from your payment; get this written into the Sale and Purchase Agreement, not just promised.

Registered mortgages and liens transfer with the property unless cleared first
Check for court injunctions and usufructs, not just mortgages
Standard practice is deregistration at or before transfer
Get the clearance commitment written into the SPA, not verbally promised

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4

Research the Developer's Track Record

For an off-plan or recently completed project, look at the developer's history: have they delivered previous projects on time and to the specifications promised? Visit an older completed project by the same developer if you can, and talk to current owners about build quality and how responsive the company was after handover. A strong sales presentation says little about construction and after-sales reliability — track record does.

Check whether past projects were delivered on time and as specified
Visit an older completed project by the same developer if possible
Ask current owners about build quality and post-handover responsiveness
A polished sales presentation is not a substitute for track record

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5

Review Common-Area Fees and the Juristic Person's Finances

For a condo, ask the juristic person for the current common-area fee per square meter, the sinking fund balance, and whether any special assessment is planned — a building with deferred maintenance often surfaces a large one-off fee soon after you buy in. Compare the fee rate against similar buildings nearby; an unusually low fee can be a warning sign of underfunded maintenance rather than a bargain.

Ask for the current fee per sqm and the sinking fund balance
Find out if a special assessment is already planned
Compare the fee against similar nearby buildings, not in isolation
An unusually low fee can signal underfunded maintenance, not a bargain

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6

Inspect the Physical Condition in Person

Walk the unit or house at a different time of day than your first viewing if you can — water pressure and noise change with usage patterns. Check for water staining on ceilings, test every tap and outlet, run the aircon in each room, and look for cracking around windows and door frames, which can indicate structural settling. For a resale unit, ask to see the last few common-area meeting minutes for reported building issues.

View at a different time of day to catch real water pressure and noise
Check for ceiling water stains and cracks around windows/door frames
Test every tap, outlet, and the aircon in every room
For resale units, ask to review recent common-area meeting minutes

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7

Verify Zoning, Access, and Boundary Markers

For land or a house on land, confirm the zoning designation matches your intended use (residential zoning won't necessarily permit commercial use later), and check that the property has legally registered access to a public road — a landlocked plot without a registered right of way can become unusable. Walk the boundary with a surveyor or the seller and confirm the physical boundary markers match the dimensions on the title deed.

Confirm zoning matches your intended use, not just current use
Verify a legally registered right of way to a public road exists
A landlocked plot without registered access can become unusable
Walk the physical boundary markers against the title deed dimensions

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8

Engage a Thai Property Lawyer for Final Review

Before you sign the Sale and Purchase Agreement, have an independent Thai property lawyer (not one supplied by the seller or developer) review the title search results, the encumbrance status, and the contract terms together. This is the point where a lawyer catches details a buyer typically misses — an ambiguous handover clause, an unclear penalty for delay, or a condition that needs to be added rather than assumed.

Use an independent lawyer, not one supplied by the seller or developer
Have the title search, encumbrance status, and contract reviewed together
This step catches ambiguous handover and penalty clauses before you sign
Budget time and fees for this review into your purchase timeline

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Frequently Asked Questions

What's the strongest type of title deed in Thailand?

Chanote (Nor Sor 4 Jor) is the strongest and most precisely surveyed title deed, giving full transferable ownership rights. Lesser title grades, like Nor Sor 3 Gor, carry more restrictions and less precise boundaries — always confirm which grade applies to a specific property before committing.

How do I check if a property has a mortgage or lien against it?

A title search at the Land Department office where the property is registered shows any registered mortgage, lien, or court injunction attached to the title. If one exists, standard practice is for the seller to clear it at or before transfer — get that commitment written into the Sale and Purchase Agreement rather than relying on a verbal promise.

Do I need a lawyer to buy property in Thailand?

It's not a legal requirement, but it's strongly recommended, especially for a foreign buyer navigating title verification, the foreign ownership quota, and contract terms in a second language. An independent Thai property lawyer reviews the title search, encumbrance status, and Sale and Purchase Agreement together, catching details a buyer typically misses.

What should I ask a condo's juristic person before buying?

Ask for the current common-area fee per square meter, the sinking fund balance, whether any special assessment is planned, and — for a resale unit — recent common-area meeting minutes. An unusually low fee compared to similar nearby buildings can be a sign of underfunded maintenance rather than a genuine bargain.

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