What are the legal steps for construction contract and site supervision — Property transactions are registered at the Land Office for the district where the property sits; specialist industries answer to their own sector regulators. Land and building tax is levied annually by the local administrative organisation at rates that follow the actual use of the property. Foreign nationals generally cannot hold freehold land under the Land Code, so leasehold, usufruct or condominium structures are used instead. The local Land Office title file is the only reliable record of mortgages, servitudes and freezes, so it should be inspected before signing. The householder or accommodation provider is responsible for the TM30 notification under the Immigration Act B.E. 2522. Foreign land ownership is restricted by the Land Code, while condominium units are subject to the foreign-quota ratio in the Condominium Act. Each embassy sets its own appointment format and supporting-document list, so always read the official notice first. A judgment or court order used abroad must be obtained as a certified extract from the court that issued it. Where a statutory deadline or a court date is involved, we set out the realistic time frame and the associated risks in advance.
“What are the legal steps for construction contract and site supervision?” falls within an end-to-end service that combines document preparation, translation, signature certification, consular legalisation and coordination with the destination mission into a single file. The people who search for it are usually preparing a filing against a fixed deadline, recovering from a rejected submission and trying to identify the missed step, or coordinating documents for several people at once.
In practice, each step sits with a different body: the issuing office, the Notarial Services Attorney, the Department of Consular Affairs, and the destination country’s diplomatic mission. Knowing which body owns which step makes it possible to judge how many stages a bundle needs, and which of them cannot be corrected without starting again.
This is a baseline set. Individual receiving authorities may add requirements, so confirm with the destination body first.
Record how many stages each document needs, who certifies it, and what must finish first, so no step has to be redone.
Check personal names, company names, addresses and dates across the whole bundle before any certification begins.
Original → translation → signature certification / legalisation → destination mission. Doing these out of order forces a restart.
Verify the number of sets, the seals, the binding, and that issue dates are still within the destination’s validity window.
| Route | When it applies |
|---|---|
| Notarial Services Attorney certification | For privately drafted instruments — powers of attorney, affidavits, consent letters — signed in the attorney’s presence. |
| Legalisation at the Department of Consular Affairs | Where a foreign authority needs confirmation of the Thai issuing office’s signature and seal, or of the translation. |
| Attestation at the destination mission | Where the destination country requires its embassy or consulate in Thailand to attest the file after consular legalisation. |
| Thailand’s Apostille status | Thailand acceded to the Apostille Convention on 30 June 2026 and it enters into force for Thailand on 28 February 2027. No Apostille is issued in Thailand before that date. |
If you are working through “What are the legal steps for construction contract and site supervision?”, start by getting the receiving authority’s requirement in writing, then plan the certification chain backwards from your real filing date.