How Is Just Compensation Calculated?

When the government takes your property through eminent domain, it must pay you “just compensation” — a term guaranteed by the Fifth Amendment. But just compensation is not what the agency decides to offer. It is a legal standard that must be calculated, and the agency’s initial calculation is almost always incomplete.

The Starting Point: Fair Market Value

Just compensation starts with fair market value — what a willing buyer would pay a willing seller in an arm’s-length transaction, with neither party under compulsion. Determining true fair market value requires expertise: knowledge of comparable sales, the property’s highest and best use, and how the taking affects the entire parcel.

The Before-and-After Method

For partial takings — where only part of your property is acquired — most states use the “before-and-after” method:

• Before value: The fair market value of your entire property immediately before the taking
• After value: The fair market value of your remaining property after the taking, reflecting all project impacts

The difference is your total just compensation. This captures both the land taken and any reduction in value to the land you keep — called severance damages.

Severance Damages: Where Agencies Shortchange Landowners Most

Severance damages compensate you for the reduction in value of the portion of your property that was not taken. Common sources include:

• Access changes: If the taking eliminates or reduces access to your remaining property, the value of the remainder drops accordingly.
• Loss of utility: If the remainder becomes oddly shaped, too small to develop, or less functional after the taking.
• Agricultural impacts: If a pipeline or transmission line bisects a farming operation, disrupting irrigation, drainage, equipment movement, or crop rotation.
• Proximity effects: In some states, the proximity of the constructed project can reduce the market value of adjacent remaining property.

What Agency Appraisals Leave Out

Agency appraisals frequently undervalue properties by:

• Selecting comparable sales that are not truly comparable to your property
• Failing to identify the highest and best use, particularly for development-path properties
• Underestimating or ignoring severance damages to the remainder
• Failing to account for water rights, mineral rights, timber value, or development potential

The difference between the agency’s appraisal and an independent appraisal is often 20% to 50% or more — and in some cases, multiples of the agency’s original offer.

How to Protect Your Right to Full Just Compensation

• Do not accept the first offer. It is a starting position, not a final number.
• Hire an independent appraiser before responding to any offer from the agency.
• Document everything about your property before any work begins — photos, surveys, lease agreements, crop records, income statements.
• Get professional representation. Most right-of-way consultants work on contingency and only get paid if they increase your compensation.

General information only — not legal advice. Consult a qualified attorney for advice specific to your situation.