Law and Taxes

Full List of Documents to Verify with a Developer in Thailand

Phuket Experts Updated 2 August 2026 5 min read

Buying real estate in Thailand is a serious step that requires a responsible approach. This is especially true for investments in properties on popular resorts like Phuket, Pattaya, or Samui. To protect your investment and ensure a transparent, legal transaction, it is crucial to conduct comprehensive due diligence on the developer and all legal documents related to the project. This guide details which papers you need to examine, what to look for, and how to avoid falling victim to fraud or unscrupulous companies.

1. Company Registration Documents

First, ensure the developer is officially registered in the Kingdom of Thailand. The company must have:

  • Company Affidavit (Certificate of Registration);
  • Tax Identification Number;
  • Construction License (if required for the project);
  • Company Memorandum of Association (MOA) detailing founders and directors.

Verifying these documents helps rule out shell companies or “one-day firms” that might disappear after receiving a down payment. It is advisable to request an extract from the commercial register and check the company’s history: how long it has been operating, if it has any completed projects, and whether it is involved in any litigation.

2. Permits and Project Documentation

Any construction project in Thailand must have a full set of permits:

  • Building Permit;
  • Approved Master Plan;
  • Approval from local administrative authorities;
  • Environmental Impact Assessment (EIA) Report (if required).

These documents confirm the project is legally compliant and adheres to urban planning and environmental regulations. The absence of even one permit can lead to construction stoppage or denial of ownership registration.

3. Land Title Documents

It is critical to verify the ownership of the land plot where construction is taking place. The main types of land documents in Thailand are:

View the full property catalog →

  • Chanote (Nor Sor 4) — Full, freehold title deed. The most secure and preferable option.
  • Nor Sor 3 Gor — A confirmed, survey-mapped certificate of use. Very reliable but requires checking for any pending upgrades to Chanote.
  • Nor Sor 3 — A certificate of use with less precise boundaries; riskier for major projects.
  • Sor Kor 1 — An older land possession document, often not recognized for modern construction.

Verify that the plot address matches the project, check for any liens, mortgages, or legal disputes, and ensure the land zoning is suitable for the intended construction type (residential, commercial, etc.).

4. Developer’s Financial Stability

A developer’s financial troubles are a common cause of unfinished projects. Request from the company:

  • Audited financial statements for the last 2–3 years;
  • Bank statements confirming sufficient funds;
  • Information on loan obligations;
  • Details on construction risk insurance.

If the developer publishes financial results publicly or cooperates with major banks, it’s a sign of credibility. Also, check if the project is accredited by Thai banks for mortgage financing.

5. Construction Stage Monitoring

Never rely solely on website photos. Personally (or through a trusted representative) visit the construction site to inspect the progress, equipment, and workforce. Ensure the project aligns with the declared plan and timeline.

Ask the developer to provide:

  • Construction schedule with key milestones;
  • Progress reports;
  • Handover certificates for completed phases (if the project is built in phases);
  • Regular photo/video updates from the site.

Reputable companies provide regular construction updates and may even offer live camera feeds from the site.

6. Sale and Purchase Agreement (SPA)

The contract with the developer is the legal foundation of your transaction. It must include:

  • Accurate property details (unit number, floor, exact area, location);
  • Total price, payment currency, and payment schedule;
  • Handover date and penalties for delays;
  • Terms for fund return in case of contract termination;
  • Warranty conditions (typically 1–5 years for defects).

The contract should ideally be bilingual: Thai and English. If you don’t speak English, ensure you have a certified translation.

7. Building/Habitation License

Even a completed building cannot be sold if the developer lacks the Building/Habitation License (Certificate of Completion). This document is issued by local authorities after the final inspection and is mandatory for registering ownership of a unit.

Without it, registration at the Land Department is impossible. Clarify with the developer when they plan to obtain this license and at what stage the process is currently.

8. Company Reputation and Client Reviews

Research the developer online: check forums, social media, and review sites. Talk to people who have already bought property in this or other projects by the same developer. Ask questions:

  • Was the property handed over on time?
  • Were there any quality issues?
  • Was it easy to obtain the title deeds?

Get a selection of properties in Phuket with installment plans up to 7 years →

Reputable developers will gladly show you completed projects, invite you for a tour, and provide contacts of previous buyers.

Checking a developer’s documents is not a formality but a mandatory step for a safe real estate purchase in Thailand. Your diligence at this stage determines whether you will receive a quality, legally registered property or face bureaucratic hurdles and financial losses.

Conclusion

Work only with reliable agencies that have experience, legal support, and transparent policies. Professional transaction support gives you confidence and peace of mind, making your real estate investment truly profitable and secure.

If you wish to obtain a full project audit, assistance in negotiations with the developer, and end-to-end transaction support — contact our team. We will help you choose a reliable property and complete the deal with maximum benefit and legal protection.

Free consultation

Have questions about property?

Our experts will reply within 10 minutes

Since 2016 800+ deals Office in Phuket
or leave a request
Blog Form (#17)
Phuket Experts

We help foreigners buy, rent and manage property in Phuket since 2016.

More Phuket property guides

Guides on buying, taxes and renting plus fresh listings — straight to your inbox.

Subscribe