Define: Existing Structure

What Existing Structure Means in a Contract

An Existing Structure is a defined term used to identify infrastructure, commonly a tower, rooftop, pole, water tank, or similar built asset, that already stands or already has approval to be built at the moment one party gives notice of an agreement to attach or locate equipment on it. The definition matters because many agreements treat the installation of equipment on something already in place very differently from the construction of a brand new structure. Where equipment is mounted on an Existing Structure, the parties often assume that zoning, structural, and environmental approvals are largely settled, which can shorten timelines and reduce upfront costs.

This term frequently appears in agreements governing telecommunications equipment, signage, antennas, or other fixtures that are affixed to a host structure owned or controlled by another party. By anchoring the definition to the moment notice is given, the contract creates a clear factual snapshot: whatever exists or is approved at that point in time qualifies, and anything built afterward may fall outside the definition unless the contract says otherwise.

Because the term is forward-looking only up to the notice date, it also helps allocate risk. If a structure is only partially built or its approval is pending, the parties must decide whether it counts as existing or as a future structure subject to different obligations, such as construction management or additional permitting duties.

How Existing Structure Is Defined or Measured

The definition typically hinges on two alternative conditions: physical installation or regulatory approval. A structure qualifies as existing if it is already installed, meaning it physically stands and is functional, or if it has been approved for installation even though construction has not yet finished. This dual test avoids disputes over whether a structure that has permits but is still under construction should be treated as new or existing.

The timing trigger is the notice of an agreement to locate equipment on the structure. This means the parties must look at the state of the structure precisely when that notice is delivered, not when the contract is signed, not when equipment is actually installed, and not at some later renewal date. Contracts should specify how notice is delivered and when it is deemed received, since this timing detail directly determines whether a structure is existing or not.

• Physical completion: the structure is built and standing at the time of notice.
• Regulatory approval: the structure has received the necessary permits or consents for installation, even if construction is incomplete.
• Notice trigger: the relevant assessment date is fixed by when notice of the equipment location agreement is given, not by the contract execution date.

Where Existing Structure Appears in Agreements

The term shows up most often in agreements involving shared infrastructure, such as an