Public Vote for Library Capital Project

We are a school district public library planning a capital project. The question is whether or not the project has to be approved by a public vote. We have been given money from our assemblyman towards the cost of the construction of one item in the plan. The remainder of the funds will be from the Friends of the Library, a foundation that is raising money in memory of two people and other private donations. We are not asking for tax dollars for the project.