Shannah Hall is an experienced real estate executive who serves as principal of Cambridge Real Estate Company, LLC. One of Shannah Hall's first executive roles in the field was as vice president and director of leasing at Cambridge Development and Investment Associates, Inc. In this position, she oversaw leasing for the Porter Exchange Building Development Project, which was occupied by retail clients. Commercial lease agreements are complex documents that can include considerations such as tenant improvement allowance, trade fixtures, and incidental expenses. The part of the costs that the leaseholder pays is determined by the type of lease they have. A gross rent lease, for instance, covers the monthly rent fee and all incidental expenses, including utilities, maintenance, and property taxes. Other common types of leases are modified gross leases, double net leases, and triple net leases. A triple net lease is similar to a gross net lease with the exception that the landlord assumes the costs of structural repairs. The leaseholder, then, pays rent as well as building insurance, utilities, property taxes, and other maintenance and operating costs. Generally, the benefit to the leaseholder assuming these additional fees is a lower rent. This type of lease is often preferred among investors, as it provides steady cash flow with little risk.