(a) Any school district may enter into leases and agreements relating to real property and buildings to be used by the district pursuant to this article.

(b) As used in this article, "building" includes each of the following:

(1) One or more buildings located or to be located on one or more sites.

(2) The remodeling of any building located on a site to be leased pursuant to this article.

(3) Onsite and offsite facilities, utilities or improvements which the governing board determines are necessary for the proper operation or function of the school facilities to be leased.

(4) The permanent improvement of school grounds.

(c) As used in this article, "site" includes one or more sites, and also may include any building or buildings located or to be located on a site.