Counties authorized to exempt owner-built dwellings in rural areas from structural code. Notwithstanding ORS 455.040, a county may by ordinance

(1) Exempt owner-built dwellings and outbuildings in any rural area within that county from compliance with the structural code, except as provided in ORS 455.340; and

(2) Establish maximum value or size limitations for structures exempted from the structural code under subsection (1) of this section. [Formerly 456.930]