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Calcimator

Phase I ESA Cost Calculator

Estimate Phase I Environmental Site Assessment costs based on property type, acreage, building count, historical use complexity, and geographic region per ASTM E1527-21.

Inputs

Results

Total estimated cost ($)

$2,500.00

≈ 19 pairs of sneakers

Base fee ($)$2,500.00
Acreage adder ($)$0.00
Building inspection adder ($)$0.00
Estimated timeline (weeks)5
Estimated consultant hours24
How to Use This Calculator
  1. Enter Site Acreage and select Property Type (commercial, industrial, residential, agricultural).
  2. Input Number of Buildings and Historical Use Complexity (1 = simple, 3 = complex).
  3. Toggle Rush Order if a compressed timeline is required.
  4. Set Regional Cost Factor to reflect local market rates.
  5. Review Total Estimated Cost ($) to budget Phase I ESA services for due diligence.

How the result changes with Regional cost factor

Regional cost factorTotal estimated cost ($)
0.65$1,625.00
1.02$2,550.00
1.48$3,700.00
1.85$4,625.00

What each input means

Site acreage
Total property area in acres.
Property type
0 = Vacant land, 1 = Commercial, 2 = Industrial, 3 = Gas station/dry cleaner, 4 = Multi-parcel.
Number of buildings
On-site structures to inspect (each adds scope).
Historical complexity (1-3)
1 = Simple (greenfield), 2 = Moderate, 3 = Complex (multiple prior industrial uses).
Rush order (0 or 1)
Set to 1 for expedited 2-3 week turnaround (+30%).
Regional cost factor
Geographic multiplier: 0.85 rural Midwest, 1.0 average, 1.25+ major metro.

What each result means

Total estimated cost ($)
All-in Phase I ESA cost.
Base fee ($)
Standard base fee for this property type.
Acreage adder ($)
Extra cost for sites larger than 5 acres.
Building inspection adder ($)
Extra cost for additional buildings.
Estimated timeline (weeks)
Expected delivery time for the Phase I report.
Estimated consultant hours
Approximate professional hours including site visit, records review, and report writing.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Site acreage = 2, Property type = 1, Number of buildings = 1, Historical complexity (1-3) = 2 = 6 input(s) provided
  2. Calculate Total estimated cost
    Total estimated cost = regionalCost * rushMultiplier
    2500 = $2,500
  3. Calculate Base fee
    2500 = $2,500
  4. Calculate Acreage adder
    0 = $0

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