The fair market value of the property taken shall not include any increase or decrease in the value of the property that is attributable to any of the following:
(a)
The project for which the property is taken.(b)
The eminent domain proceeding in which the property is taken.(c)
Any preliminary actions of the plaintiff relating to the taking of the property.
Source:
Section 1263.330, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CCP§ionNum=1263.330..