Phase 1 Environmental Site Assessment Cost
See typical Phase 1 / Phase I ESA cost ranges, run the free calculator, and open state guides for California, Texas, and all 50 states. Informational planning estimates only.
Phase 1 environmental site assessment cost guides
Start with the free Phase I ESA cost calculator, read the national cost guide, or jump to a state-specific page. Looking for a local site visit? Read Phase 1 environmental site assessment near me. All figures are planning estimates for U.S. commercial due diligence—not formal consultant quotes.
Phase I ESA Cost Calculator
Free tool for all 50 states—enter property type, acreage, site history, and building count for a localized planning range.
Open calculator →Due Diligence Guide Library
Phase 2 cost, timelines, SBA, ASTM E1527-21, REC definitions, and free checklists.
Browse guides →National Phase 1 ESA Cost Guide
2026 U.S. price ranges, ASTM E1527 scope, pricing drivers, turnaround time, and how to compare consultant quotes.
Read the guide →Phase 1 ESA Cost by State
Localized guides for California, Texas, Florida, New York, and all 50 states—regional indexes and property-type tables.
Browse all states →Phase 1 ESA cost by property type
High-intent asset classes with dedicated pricing drivers, common RECs, and preset calculators.
Free tools & checklists
Popular state guides
Regional labor, records access, and industrial legacy move Phase 1 Environmental Site Assessment quotes. Start with these high-traffic markets or browse all 50 states.
Phase 1 environmental site assessment cost FAQ
Common questions on cost, timing, and due diligence— with links to deeper guides.
What is a Phase 1 Environmental Site Assessment (ESA)?+
A Phase 1 Environmental Site Assessment (ESA) evaluates potential environmental risks on a property—contamination from past use, adjacent sites, and regulatory records—before a commercial transaction closes. Most U.S. reports follow ASTM E1527 and support lender due diligence.
How much does a Phase 1 environmental site assessment cost?+
Typical U.S. Phase 1 environmental site assessment cost in 2026 starts around $1,850 for small, lower-risk parcels and can exceed $6,500 for industrial or multi-building sites. Final quotes depend on state, property type, acreage, site history, and lender scope—not a single national flat fee.
When is a Phase 1 ESA required?+
Buyers and lenders most often order a Phase 1 ESA during commercial acquisitions, refinances, SBA or conventional loan underwriting, and major lease or redevelopment milestones. Requirements vary by deal structure and financing program.
Why does Phase 1 ESA cost vary by state?+
Consultant labor rates, travel, records depth, and industrial legacy differ across markets. California and Northeast indexes often run higher than many Sun Belt states for the same property profile—which is why localized state guides matter for budgeting.
What happens if contamination is found during a Phase 1 ESA?+
If Recognized Environmental Conditions (RECs) are identified, the next step is often a Phase 2 ESA with subsurface sampling—not included in Phase 1 pricing. Remediation or regulatory closure, if needed, is a separate scope and budget line.
How long does a Phase 1 ESA take?+
Standard commercial sites often finish in 7–14 business days after the consultant is engaged. Complex industrial history, multi-building campuses, or busy records queues can extend timelines—order early if a closing date is fixed.
Does Phase 1 ESA cost differ by property type?+
Yes. Gas stations, warehouses, retail centers, vacant land, and industrial parcels use different research depth and field time. Property-type guides break out common RECs and preset calculator inputs for high-intent asset classes.
How long is a Phase 1 ESA report good for?+
Many lenders treat a Phase 1 environmental site assessment as current for about 180 days. If the report is older, the site changed use, or you are refinancing with a new lender, budget for an update or a new report. Confirm the window with your lender before you reuse a seller’s report.
Do I need a Phase 1 ESA for a house?+
Ordinary single-family purchases use a home inspection, not an ASTM Phase 1 ESA. You typically need a Phase 1 when the deal is commercial, multifamily, or the house sits on former gas station, dry cleaner, or industrial land. Those jobs are priced like small commercial due diligence, not like a home inspection.
How do I find a Phase 1 environmental site assessment near me?+
“Near me” means a consultant who can walk your parcel and pull local records—not a different ASTM standard. Start with your state’s cost guide, then request proposals from firms that cover that metro. This site publishes planning ranges only and does not rank consultants.
Is EcoAssessCosts a substitute for hiring a consultant?+
No. EcoAssessCosts publishes independent educational content and planning calculators only. Always confirm ASTM E1527 scope, exclusions, and final fees with a qualified environmental professional before you award a project.