What constitutes a permanent structure for permitting purposes?

Defining Permanent Structures

For permitting purposes, the key factor in determining whether a structure is permanent is its attachment to the ground. A structure that is bolted or screwed to a foundation, such as a concrete slab or pier, is generally considered permanent. In contrast, structures that are placed on adjustable stands or can be easily relocated are not considered permanent. In off-grid solar installations, for example, a ground-mounted racking system with a fixed foundation is typically considered permanent, while a roof-mounted system is generally not.

Measuring Permanence through Siting and Design

The location and design of a structure can also influence its classification as permanent. Structures that are placed in areas with high wind loads, for example, may require more robust anchoring systems to prevent damage or dislodgement. Similarly, structures that are designed to be easily disassembled or relocated may not be considered permanent, even if they are bolted to the ground. Off-grid builders should consult with local authorities to determine specific requirements for their project.

Demonstrating Permanence through Documentation

To demonstrate that a structure is permanent, builders should maintain detailed records of the project’s design and construction, including plans, permits, and inspection reports. This documentation should show that the structure meets local building codes and regulations, including those related to foundation design, anchoring systems, and siting. By maintaining accurate records, builders can provide clear evidence that their structure is permanent and meet the requirements for permitting and certification.