How long after the issuance of a permit does it become invalid if the work has not commenced?

When a permit is issued for construction work, it typically includes a provision regarding how long it remains valid if no work has been commenced. In many jurisdictions, this duration is set to six months. This time frame allows contractors to plan and organize their projects without requiring immediate action, providing a reasonable window for preparation while still ensuring that the permit does not remain active indefinitely without progress.

The rationale for the six-month period is based on the need to ensure that permits reflect current regulations, conditions, and site circumstances. If work does not start within this time, there may be changes in zoning laws, building codes, or safety standards that the project would need to comply with upon resuming. Therefore, requiring that work commence within six months ensures the integrity and relevance of the permit in relation to existing regulations and conditions.