NRS 108.790

If any account for work done or materials furnished remains unpaid for 90 days or more after completion of the work, or if the articles are placed in storage, and the charges for storage and for work done and materials furnished remain unpaid for 12 months or more, the lienholder may, upon 30 days’ notice in writing to the owner specifying the amount due and informing the owner that the payment of the amount due within 30 days will entitle the owner to redeem the property, sell any such article or articles at public or bona fide private sale to satisfy the account.