Standard environmental review at acquisition.

  • Standard environmental review at acquisition.
  • ASTM-standard records review and site walk.

Phase I environmental site assessment

Investment · US

Short definition

Standard environmental review at acquisition.

Full definition

ASTM-standard records review and site walk. Identifies recognised environmental conditions (RECs) requiring Phase II testing. Required by all institutional lenders.

Why this matters for Class A leasing

Phase I environmental site assessment is part of the investment vocabulary that institutional Class A occupiers, landlords, and advisers use across US markets. Understanding it correctly affects how you read lease documents, model occupancy economics, and benchmark deal terms across cities. Class A Atlas tracks the US definition alongside the global standard so cross-border occupiers can translate quickly.