Permits, Environmental & Compliance

Phase I Environmental Site Assessment

ASTM E1527-21 Phase I ESA to identify contamination risk before buying or financing commercial property. Typical US fees run $1,500 to $5,000 per site, and most projects take 2 to 4 weeks.

Typical US fee$1,500 to $5,000per site

Typical timeline2 to 4 weeks

Permit drawingsAs needed

What the work involves

A Phase I ESA reviews historical records, regulatory databases, site reconnaissance and interviews to identify recognized environmental conditions. Performed to ASTM E1527-21 and EPA's All Appropriate Inquiries rule, it helps buyers qualify for CERCLA liability protections and is commonly required by commercial lenders. It is performed by an environmental professional, who may or may not be a civil engineer.

When you need it

Buying commercial or industrial property
Lender requires a Phase I
Former gas station, dry cleaner or industrial use
Redevelopment of a brownfield

What you receive

Phase I ESA report
Recognized environmental conditions list
Recommendations for Phase II if needed

What drives the cost

Estimate from consultant and cost-guide sources, which commonly report about $1,500 to $5,000 for typical sites and more for large or complex ones.

Frequently asked questions

How much does phase I Environmental Site Assessment cost?

Across the US, phase I Environmental Site Assessment usually costs $1,500 to $5,000 per site. Estimate from consultant and cost-guide sources, which commonly report about $1,500 to $5,000 for typical sites and more for large or complex ones.

How long does phase I Environmental Site Assessment take?

Plan on 2 to 4 weeks from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.

Is a permit required for phase I Environmental Site Assessment?

Often not on its own, but the findings frequently lead to work that does need a permit. We tell you which parts of the follow-up work your local building department will review, and can prepare those drawings too.

Will I also need a environmental professional?

Sometimes. Depending on the site, phase I Environmental Site Assessment can also involve a environmental professional, environmental consultant or environmental attorney. We tell you up front which other professionals your project needs and coordinate with them so the drawings agree.

Who do you provide phase I Environmental Site Assessment for?

Most of our clients for this service are developers, lenders, business owners and attorneys. Describe your project and one of our engineers will reply with scope, fee and schedule.

What standard governs a Phase I?

ASTM E1527-21, which EPA recognizes as satisfying the All Appropriate Inquiries rule. Lenders usually specify the standard in their requirements.

Does a Phase I include sampling?

No. Sampling is part of a Phase II if the Phase I identifies concerns.

How long is a Phase I valid?

Under AAI, certain components must be updated if older than 180 days, and the report is generally viable for one year with updates. Plan timing around your closing date.

Is a civil engineer required?

No. It must be done by an environmental professional as defined by EPA, which can include engineers.