Iowa Code § 6A.5: Right to purchase.

Whenever the power to condemn private property for a public use is granted to any officer, board, commission, or other official, or to any county, township, or municipality, such grant shall, unless otherwise declared, be construed as granting authority to the officer, board, or official body having jurisdiction over the matter, to acquire, at its fair market value, and from the parties having legal authority to convey, such right as would be acquired by condemnation.