Affix Law and Legal Definition

Affix means to permantly attach something to real estate, such as planting trees and shrubs, constructing a building, or adding to existing improvements. Affixed items are permanent and cannot be picked up and moved away like a dishwasher. Affix may also be used to refer to the act of signing or sealing a document, as in affixing one's signature to a note. Items affixed to real estate are called fixtures when they become part of the premises and its removal would do harm to the building or land.