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Environmental Impact Assessment (EIA) License in Thailand

Your Guide to Environmental Impact Assessment (EIA) with SiamConsult

Planning a large-scale construction or development project in Thailand?

You may be legally required to conduct an Environmental Impact Assessment (EIA)—especially if your project involves sensitive areas such as coastlines, national parks, or locations near protected natural resources.

The EIA is not a business license, but it is a mandatory process under Thai law for many high-impact developments: resorts, industrial facilities, real estate complexes, marinas, and significant infrastructure projects. Without EIA approval, building permits, land-use permissions, and even utility access can be delayed or denied. Early compliance is essential for project success and risk management.

Pros and Cons of EIA for Your Project

Pros:
- Essential for legal development approval—without it, building permits and operations are impossible for many projects
- Helps manage risks and prevent costly delays or shutdowns
- Demonstrates environmental and social responsibility to investors, partners, and the public
- Protects your project from legal challenges and future disputes
- Can improve project planning by identifying potential environmental issues early
Cons:
- The process can be complex and time-consuming, requiring coordination with multiple agencies.
- Consultant fees and compliance costs can be significant for large projects
- Delays or rejections are possible if documentation is incomplete or standards are not met
- Regular monitoring and reporting may be required after approval

How SiamConsult Makes EIA Compliance Smooth

SiamConsult helps you navigate this complex, multi-agency process with clarity and care.
We coordinate with licensed environmental experts, prepare and review your documentation, and represent your project throughout every stage of the EIA review and approval process.
If there’s a challenge, we fix it quickly and professionally.

Our EIA Support Services

Assessing whether your project is legally required to submit an EIA
Coordinating with certified environmental consultants and engineers
Managing submission to the Office of Natural Resources and Environmental Policy and Planning (ONEP)

For related legal and business support:

For resort, hotel, or villa developments, see our Hotel License in Thailand page.
For BOI investment projects, review our BOI Company Registration guide.
If you need to set up a new entity, learn about setting up a foreign company.
For advice on property purchase or land registration, visit our Land Ownership & Lease Registration resource.

We also provide accounting and audit services for ongoing compliance.
To get started or discuss your project confidentially, contact SiamConsult today.

Key Notes for Project Owners & Developers

EIA is required for many types of large-scale construction, resort, and industrial projects in Thailand
Delays or non-compliance can halt your development or lead to legal penalties.
For official requirements, visit the Office of Natural Resources and Environmental Policy and Planning (ONEP)
See additional EIA law and guidelines at the Pollution Control Department (PCD)

For resort owners, developers, and investors, early EIA planning is the key to avoiding costly delays and legal risks.
SiamConsult ensures that your project meets all environmental compliance requirements, allowing you to move forward with confidence and transparency.

Planning a large project in Thailand?
Contact SiamConsult to check your EIA obligations and get expert guidance.

Step-by-Step: How SiamConsult Helps You Apply for an Environmental Impact Assessment (EIA) License in Thailand

1. Project Consultation & EIA Requirement Check

SiamConsult begins by reviewing your project—whether it’s construction, industrial, tourism, or infrastructure—and confirms whether an EIA is legally required.
We reference the latest rules and environmental criteria from the Office of Natural Resources and Environmental Policy and Planning (ONEP) under the Ministry of Natural Resources and Environment.

2. Scoping & Feasibility Assessment

Our team helps define the full scope of your project, its environmental sensitivity, and all data collection required for the EIA. SiamConsult coordinates with certified environmental consultants to ensure you meet both regulatory and scientific standards.

3. Data Collection & Environmental Study

We assist with field studies, environmental baseline surveys, community and stakeholder engagement, and compiling the scientific data needed for the EIA report.
This includes assessments of water, air, waste, biodiversity, social, and economic impacts tailored to your project.

4. EIA Report Preparation & Submission

SiamConsult manages the preparation and technical formatting of your EIA report in accordance with Thai law.
Once complete, we submit your EIA to ONEP for technical review and approval.

5. Public Hearing & Stakeholder Consultation

For most EIA projects, a public hearing is mandatory.
SiamConsult organizes all required community consultations, facilitates meetings, and ensures that local stakeholder feedback is documented and included in the submission.

6. Technical Review & Authority Liaison

ONEP and other relevant authorities will review your EIA and may request clarifications or further studies. SiamConsult coordinates responses and follows up with the authorities until a final decision is reached.

7. EIA Approval & License Collection

Once approved, SiamConsult collects the EIA approval documents on your behalf and briefs your team on the ongoing environmental obligations.
This includes reporting, mitigation measures, and monitoring required under Thai law.

8. Ongoing Compliance & Environmental Monitoring

We support your business with environmental monitoring, regular reporting, and any necessary renewal or adjustment applications if your project changes. Our experts ensure your company remains compliant and prepared for audits.

Need an EIA for your project in Thailand?
Contact SiamConsult for full support with environmental licensing, ONEP procedures, and project compliance.