Who supplies construction cost estimates for branch library development budget requests?

The correct answer is Engineering. In the context of development budget requests for branch libraries, engineering departments typically play a crucial role in providing accurate construction cost estimates. Their expertise includes analyzing the technical aspects of the project, understanding the materials and labor involved, and considering local building codes and regulations. This allows them to provide detailed estimates that accurately reflect the costs that will be incurred during the construction phase.

Other departments or offices may contribute valuable insights or support in the budgeting process, but engineering is primarily responsible for delivering the precise financial assessments needed for construction projects. For instance, while the Library Department may identify needs and priorities for development and Public Buildings might oversee the management of public construction projects, it's the Engineering team that has the specialized skills necessary to articulate the costs associated with those projects effectively. The Chief Administrative Officer (CAO) generally focuses on broader administrative and policy-related issues, rather than the technical aspects of construction cost estimates.