Or. Rev. Stat. § 215.044
(1) County governing bodies may adopt and implement solar access ordinances. The ordinances shall provide and protect to the extent feasible solar access to the south face of buildings during solar heating hours, taking into account latitude, topography, microclimate, existing development, existing vegetation and planned uses and densities. The county governing body shall consider for inclusion in any solar access ordinance, but not be limited to, standards for:
[1981 c.722 §2]