Iowa Code
Chapter 563 - WALLS IN COMMON
Section 563.2 - Contribution by adjoining owner.

563.2 Contribution by adjoining owner.
If the adjoining owner contributes one-half of the expense of building such wall, then it is a wall in common between them, but if the adjoining owner refuses to contribute, the adjoining owner shall have the right to make it a wall in common by paying to the person who erected or maintained it one-half of its appraised value at the time of using it.
[R60, §1915; C73, §2020; C97, §2995; C24, 27, 31, 35, 39, §10164; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §563.2]