Phase 1 environmental site assessment cost in 2026
Phase 1 environmental site assessment costs $1,200 to $10,000 per site assessment in 2026, and most people pay about $2,500.
What moves the price
- Larger lots and more buildings cost more.
- Past uses such as gas stations or factories raise the price.
- Rush orders cost more.
- Local rules and the consultant's rates change the price.
- Lender or buyer requirements can add work.
- Where you live. Prices in big cities usually run higher than in small towns.
What is included
The price usually covers records review, a site visit, interviews and a written report. Soil or water testing is not part of Phase 1 and costs more under a later phase. Rush service and extra reports may also cost extra.
Phase 1 cost by site size
| Site | Typical range |
|---|---|
| Small residential property | $2,000 to $3,000 |
| Under 1 acre | $1,800 to $2,500 |
| 1 to 5 acres | $2,500 to $3,500 |
| Commercial property or small site | $3,000 to $5,000 |
| 5+ acres | $3,500 to $6,000+ |
| Large industrial or multi use site | $5,000 to $10,000+ |
Average prices in US dollars. Source: ThePricer.
Ways to pay less
- Get quotes from more than one consultant.
- Allow enough time so rush fees are not needed.
- Ask the lender which report format is required so no extra work is bought.
What price guides say
We checked 3 price guides and read every number on their pages. They do not all measure the same thing, so the ranges on this page come from putting them side by side.
- ThePricer: How Much Does Phase 1 Environmental Site Assessment Cost?
- RSB Environmental: Cost of a Phase 1 Environmental Site Assessment
- AEI Consultants: Phase I ESA
Common questions
How much does this cost in 2026?
Phase 1 environmental site assessment costs $1,200 to $10,000 per site assessment in 2026, and most people pay about $2,500. Most people pay about $2,500 per site assessment. The low end is $1,200 and the high end is $10,000.
What changes the price the most?
The biggest factors are: Larger lots and more buildings cost more; Past uses such as gas stations or factories raise the price; Rush orders cost more.
How can I pay less?
Get quotes from more than one consultant. Allow enough time so rush fees are not needed. Ask the lender which report format is required so no extra work is bought.
Where do these numbers come from?
From 3 named price guides: ThePricer, RSB Environmental, AEI Consultants. Each one is linked on this page with the date we read it.
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