Phase 1 ESA Cost by State (2026)
Updated May 2026 · ASTM E1527-21 compliant pricing
A Phase 1 Environmental Site Assessment costs $2,000-$4,500 nationally in 2026 for a standard commercial parcel. Costs vary by state (Hawaii and California are ~30% higher; the Midwest is ~15% lower), property history (gas stations and dry cleaners add 30-60%), property size, and lender-required scope.
Quick Answer: Phase 1 ESA Cost Factors
- Base price (2026): $2,000-$4,500 for a single commercial parcel under 10 acres
- Timeline: 2-3 weeks standard, rush available at +30-50%
- Property type premium: Gas stations +50-100%, dry cleaners +30-60%, industrial +20-40%
- State variation: Hawaii most expensive, Mississippi/Arkansas/West Virginia lowest
- Standard: ASTM E1527-21 (EPA AAI rule, 40 CFR 312)
- Required by: Most CRE lenders — SBA, Fannie Mae, Freddie Mac, CMBS, HUD/FHA
Find the Best Provider for Your Property
Gas stations, dry cleaners, and industrial properties typically cost 30-80% more due to increased contamination risk.
Phase 1 ESA Costs by State
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Phase 1 ESA Cost by Property Type
Higher Risk Properties
These property types have higher Phase 1 ESA costs due to increased contamination risk:
Standard Properties
These property types have standard Phase 1 ESA pricing:
What is a Phase 1 ESA?
A Phase 1 Environmental Site Assessment (ESA) is an investigation to identify potential environmental contamination at a property. It's conducted in accordance with ASTM E1527-21 standards and is required by most commercial lenders.
What's Included in a Phase 1 ESA
- Historical records review (Sanborn maps, aerial photos, city directories)
- Regulatory database search (EPA, state agency records)
- Site reconnaissance and visual inspection
- Interviews with current/past owners and occupants
- Written report with findings and recommendations
When Do You Need a Phase 1 ESA?
- Purchasing commercial property
- Refinancing with a new lender
- Securing SBA, Fannie Mae, or other agency loans
- Due diligence for property development
- Establishing CERCLA liability protection
2026 Phase I ESA Standards: What You Need to Know
Every Phase I Environmental Site Assessment in 2026 must comply with the EPA's All Appropriate Inquiries (AAI) Final Rule (40 CFR Part 312). EPA recognizes two ASTM standards as AAI-compliant:
- ASTM E1527-21 — the standard for commercial Phase I ESAs. Replaced E1527-13 in 2022.
- ASTM E2247-23 — the standard for forestland or rural property assessments (a 2023 update).
Five things changed when E1527-21 replaced E1527-13:
- PFAS as Business Environmental Risk (BER) — Per- and polyfluoroalkyl substances are explicitly listed in the non-scope section. Environmental Professionals can (and increasingly do) flag PFAS exposure as a business risk even when it's not a federally regulated hazardous substance under CERCLA.
- Deeper adjoining-property research — Historical aerial photos, city directories, fire insurance maps, and topographic maps must now be reviewed for adjacent properties, not just the subject parcel.
- Refined REC, CREC, and HREC definitions — Recognized Environmental Condition, Controlled REC, and Historical REC have clearer boundaries to reduce inconsistency between Environmental Professionals.
- Tighter "significant data gap" standard — Reports must now precisely describe what data is missing and how it impairs the EP's ability to identify RECs.
- 180-day report viability clock — The 180-day shelf life now depends on when each component (site visit, interviews, records review, lien search) was completed — not the report date. This affects how lenders and title companies treat older reports.
Action item: Confirm in writing that your Phase I ESA quote references ASTM E1527-21 (or E2247-23 for rural land) and not the retired E1527-13. Reports written to the 2013 standard no longer satisfy AAI for closings after 2023.
When does AAI need to be conducted?
AAI must be conducted or updated within one year before the date of property acquisition. Critical components — interviews with current/past owners and operators, government records review, on-site visual inspection, and the environmental lien search — must be completed or refreshed within 180 days of acquiring ownership.
Who can perform a Phase I ESA?
Per the AAI Final Rule, an "Environmental Professional" (EP) must possess one of:
- A state or tribal certification or license plus three years of full-time experience
- A bachelor's degree or higher in a relevant science or engineering discipline plus five years of full-time relevant experience
- Ten or more years of relevant, full-time work experience
Frequently Asked Questions
How much does a Phase 1 ESA cost in 2026?
In 2026, Phase 1 ESA costs typically range from $2,000 to $4,500 for standard commercial properties, with most transactions falling around $2,500 to $3,500. Smaller, low-risk sites start near $1,800-$2,000. Gas stations, dry cleaners, manufacturing, and industrial properties cost 30-80% more due to higher contamination risk. Rush services add 25-40% to the base price. Complex industrial sites or sites needing vapor intrusion screening can run $5,000-$10,000+.
How long does a Phase 1 ESA take?
Standard Phase 1 ESA turnaround is 2-3 weeks. Rush service is available in 5-7 business days for an additional fee. Complex properties or areas with limited environmental records may require additional time. The 180-day component clock under E1527-21 means certain elements (interviews, records review, site visit, lien search) must be refreshed if your closing slips.
What triggers a Phase 2 ESA?
A Phase 2 ESA is recommended when the Phase 1 identifies recognized environmental conditions (RECs) that require further investigation. This typically involves soil and groundwater sampling and costs $5,000-$25,000 depending on scope. Vapor intrusion assessment is increasingly common when historical use included gas stations, dry cleaners, or solvents.
Does a Phase 1 ESA cover PFAS?
Per ASTM E1527-21, PFAS (per- and polyfluoroalkyl substances) are not automatically a scope item under federal AAI — but they are listed in the standard's non-scope section as a "Business Environmental Risk." Many lenders, especially CMBS and life-company lenders, now ask Environmental Professionals to evaluate PFAS exposure as a BER, particularly for properties with airport, firefighting, military, plating, or textile-finishing history. Several states (NY, CA, MI, MN, NJ) have stricter PFAS rules that may bring it into scope at the state level.
How long is a Phase 1 ESA report valid?
Phase 1 ESA reports have a 180-day "shelf life" under ASTM E1527-21 and the EPA AAI Rule. The 180-day clock applies separately to four components: interviews, government records review, the on-site visual inspection, and the environmental lien search. The full AAI must be conducted or updated within one year before property acquisition. Reports older than these limits must be refreshed to satisfy AAI for CERCLA liability protection.
Do I need a Phase 1 ESA for a residential purchase?
AAI applies to commercial transactions and to individuals purchasing property for non-residential use. Pure single-family residential purchases generally don't require a Phase 1, but multifamily (5+ units), mixed-use, and home-with-business purchases typically do. SBA, Fannie Mae, Freddie Mac, and HUD loan programs each have their own ESA requirements — see our lender requirements guide.