Phase I Environmental Cost Calculator

Phase I ESAs are standard on commercial acquisitions. This calculator sizes the cost.

Site acres

Building SF

Consultant base fee

Rush premium %

Total Phase I cost

$6,640

Base estimate

$6,640

Size adjustment

$2,840

How the math works

Base fee + size adjustment × rush premium = total. Size adjustment scales with acres and SF.

Phase I ESAs identify 'RECs' that can block financing. Order early so a Phase II (if triggered) can still complete before closing — a Phase II discovery 2 weeks before close typically adds 30-60 days to the timeline. This is the single most common environmental due-diligence delay.

How to Use

Enter site acreage.
Enter building SF.
Enter consultant base fee.
Enter rush premium %.
Read Phase I total cost.

Frequently Asked Questions

What's in Phase I?

Historical research (aerial photos, Sanborn maps, deeds). Regulatory database review. Site walk and nearby area reconnaissance. Interviews with owner/occupants. Report identifies RECs (Recognized Environmental Conditions). No soil or water sampling.

Typical cost?

Small commercial (<5 acres, <20k SF): $2,500-5,000. Mid-size (5-20 acres, 20-100k SF): $4,000-8,500. Large/complex: $8,000-20,000. Industrial properties: 50-100% premium. Rural: often lower. Urban infill: often higher due to historic industrial use.

When to order?

Immediately after PSA/LOI. 3-4 week turn time typical. Required by lenders for 99% of commercial loans. Establishes innocent landowner defense under CERCLA if done within 180 days of closing.