The term "nnn" is commonly used in commercial real estate and stands for "triple net lease". A triple net lease is a type of lease agreement on a property whereby the tenant or lessee promises to pay all the expenses of the property, including real estate taxes, building insurance, and maintenance, in addition to rent and utilities. With a triple net lease, the tenant assumes ongoing expenses that would otherwise be the responsibility of the property owner, which tends to result in lower rents. Triple net leases are commonly found in commercial real estate and have become popular investment vehicles for investors because they provide low-risk, steady income. Other types of net leases include single net leases, in which the tenant pays property taxes, and double net leases, which include property taxes and property insurance.