Phase 1 environmental site assessment cost
Most standard commercial Phase I ESAs are quoted at roughly $1,800 to $3,200; large, complex or rush sites run $6,500+. Here is where those numbers come from, what you get, and how to use a free pre-screen before you spend it.
Updated 2026-11-13. We do not perform Phase I assessments and are not paid by the firms cited.
Published price ranges
| Source (published by) | Range or figure |
|---|---|
| Phase One ESA (consultancy) | Most jobs $1,800 - $3,000 |
| GeoForward (consultancy) | Typical $1,900 - $3,200; up to $6,500 (2024) |
| Compyle Environmental, citing LightBox EDR's May 2023 benchmark | Average $3,083, 16 business days; published ranges $1,800 - $5,000 (Oct 2026) |
| Esseltek (consultancy) | Starts around $1,400 |
| RMA (consultancy) | $3,500 - $15,000+ for complex facilities |
Prices are what each firm published; your quote depends on the property and market. Accessed 2026-11-13.
What drives the price
- Property size and complexity: a developed urban lot with a long industrial history takes more research than a vacant parcel (Fehr Graham).
- Location and access: travel time and site access.
- Historical records: Sanborn maps, aerial photos, city directories and database reports the EP has to buy and review.
- Turnaround: rush delivery costs more.
- Lender requirements: SBA and agency lenders may require extra scope.
What a Phase I includes (ASTM E1527-21)
- Review of federal, state, tribal and local environmental records within set search distances.
- Historical use research back to first development.
- A site reconnaissance by the Environmental Professional.
- Interviews with owners, occupants and local officials.
- User-provided information: environmental liens, activity and use limitations, specialized knowledge, price reflecting contamination.
- A report with findings on recognized environmental conditions and the EP's opinion.
EPA's All Appropriate Inquiries rule references ASTM E1527-21 (40 CFR 312.11) and requires the inquiry be done by or under an Environmental Professional (40 CFR 312.21). See also EPA's AAI fact sheet.
How a pre-screen helps you decide
A free records check covers one slice of a Phase I: the federal database search. In seconds it shows whether Superfund, RCRA, brownfield, leaking-tank or violation records sit near the property. Use it to:
- decide early whether to order a Phase I before the contingency period runs out,
- flag questions for the seller or your EP,
- compare several candidate properties before paying for any assessment.
Run a free check on an address See the full report
Informational pre-screen from public government records. NOT an ASTM E1527-21 Phase I Environmental Site Assessment, not performed by an Environmental Professional, and it does not satisfy All Appropriate Inquiries (40 CFR Part 312) or any CERCLA liability defense. Lenders and buyers who need a Phase I must hire an Environmental Professional.
FAQ
How much does a Phase 1 environmental site assessment cost?
Published ranges from environmental consulting firms put a standard commercial Phase I at about $1,800 to $3,200, with large, complex or rush jobs at $6,500 and above; at least one firm quotes $3,500 to $15,000 for complex facilities. A 2023 industry benchmark (LightBox EDR, as cited by Compyle Environmental) put the average at $3,083 and 16 business days.
How long does a Phase I take?
Typically two to four weeks; the 2023 benchmark cited above averaged 16 business days.
Can a database pre-screen replace a Phase I?
No. Only a Phase I performed by an Environmental Professional under ASTM E1527-21 meets the All Appropriate Inquiries rule (40 CFR Part 312) needed for CERCLA landowner liability protections, and most commercial lenders require one.