The amount of advance written notice required before exercising a lease right, making a demand, declaring a default, or taking another lease action, as prescribed by the specific lease provision.
Notice periods appear throughout commercial leases: exercising renewal and termination options (commonly 6–12 months before expiration); declaring a default and starting the cure period (3 days for non-payment, 30 days for other defaults); requesting consent to assignment or subletting; triggering co-tenancy remedies; and exercising expansion or ROFR rights. Notice must typically be given in writing and delivered by a specified method (certified mail, overnight courier, personal delivery). Many leases require notice to be sent to specific named parties at specific addresses. Missing a notice deadline — even by one day — typically forfeits the right permanently, making notice period tracking a core lease administration function.
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