This is a common type of lease rate in addition to gross and Triple Net Leasing – The Full Service Lease. You could say it is the opposite of a Triple Net, in that the base rent payment covers all costs of property taxes, insurance, and maintenance. Additionally it covers the cost of all utilities and janitorial. These leases are very common in medical office buildings, and with tenants who require and “all in” number for long term budgeting. Many government agencies (IRS, DOJ, etc) require these types of leases by their oversight panels.
For definitions of all lease types, See Commercial Real Estate Definitions