Cal. Education Code § 17518

(a) The governing board of a school district may let to any private person, firm, local governmental agency, as defined in paragraph (3) of subdivision (f) of Section 4420 of the Government Code, or corporation, any real property that belongs to the district if the instrument by which the property is let requires the lessee therein to construct on the demised premises, or provide for the construction thereon of, a building or buildings for the joint use of the school district and the private person, firm, local governmental agency, as defined in paragraph (3) of subdivision (f) of Section 4420 of the Government Code, or corporation during the term of the agreement. (b) However, title to that portion of the building to be occupied by the private individual, firm, local governmental agency, as defined in paragraph (3) of subdivision (f) of Section 4420 of the Government Code, or corporation shall remain exclusively the personal property of the private party during the term of the lease and the title to that portion of the building to be occupied by the district shall vest in the district upon completion thereof and acceptance thereof by the school district. No rental fee or other charge for the use of the building shall be paid by the district.