The lawful authorities of any city or incorporated town or village, the county commission of any county, individual owners or associations of such owners, shall have the right to construct sewers or drains in sanitary districts, organized under this chapter, at their own expense, but plans for such sewers and drains must conform to the plans adopted by the board of trustees, and all such plans must be submitted to and be approved by said board of trustees before any construction work is done thereon.