Due Diligence
Tetra Tech provides comprehensive technical due diligence services that help clients assess and mitigate environmental, regulatory, and financial risks across global portfolios.
Our experienced advisory teams help clients understand and manage the risks and opportunities associated with property, land, business, and asset transactions. With global expertise and local insight, we enable private and public sector clients to make informed decisions through comprehensive environmental, regulatory, and financial assessments.
Our approach is proactive, pragmatic, and tailored—designed to identify potential liabilities, environmental, social, and governance (ESG) considerations, and value-add opportunities. Whether supporting mergers and acquisitions (M&A), divestments, refinancing, or redevelopment, our experts deliver timely, robust advice throughout the investment lifecycle.
Environmental Due Diligence
We provide environmental due diligence across a wide range of sectors, helping clients uncover and mitigate environmental liabilities.
- Environmental red flag reporting
- Phase 1 and Phase 2 environmental site assessments
- Contaminated land risk evaluation and remediation strategy
- Asbestos, legionella, and hazardous materials surveys
- Environmental permitting and compliance reviews
- Expert witness, pollution response, and management
- Climate change risk and resilience screening
- M&A audits and operational Phase 1 environmental, health, and safety (EHS) due diligence assessments
Technical Due Diligence
Our technical assessments help investors and asset owners understand the condition, performance, and operational risks of their physical assets.
- Corporate site audits (EHS transaction & full compliance)
- Energy performance and efficiency assessments
- Fire safety and structural reviews
- Lifecycle costing and capital expenditure forecasting
ESG and Sustainability Due Diligence
We integrate ESG analysis into traditional due diligence to provide a complete picture of regulatory alignment and sustainability potential.
- ESG gap analysis, assurance, and benchmarking
- Regulatory compliance and permitting
- Green building certifications (BREEAM, LEED)
- Climate risk and resilience planning
- Energy efficiency and carbon reporting
- EHS and sustainability development and integration
- Product stewardship and liability
- Supply chain sustainability and ethical trade
Commercial Due Diligence
By combining market intelligence with technical insight, we help clients assess the commercial viability and risks of their investments.
- Vendor support (EHS data evaluation and gap analysis, EHS data room preparation)
- Asset evaluation: demolition, decontamination, and decommissioning assessments and costing
- Site closure planning
- Lenders’ technical advisor services
