With telecommunications, Landlord's have not exercised the same control, simply because the laws did not permit it. Today, however, the rules have changed and continue to change. New services never before anticipated are now the rule. The Tenant should insure in his lease that there are no restrictions regarding access to a preferred vendor. Physical limitations, such as riser capacity, need to be evaluated.
Rights have to be negotiated into the lease to access common and mechanical areas in the building.
Roof rights have become expensive, especially in highly visible locations. There are a variety of ways to negotiate the construction cost for a space or building, but it is dependent on who performs the work. Frequently, the construction company and the Landlord may not be independent entities, i.e. construction is a profit center for the Landlord. Therefore, there should always be a system of checks and balances for controlling the construction process and costs. The simplest way to control construction is to have the Landlord provide a monetary contribution towards the Tenant's build-out costs.