Your comment is incorrect because you are describing SB 10, not SB 9. SB 9 indeed allows duplexes on all single-family parcels, as well as lot splits if one of

Your comment is incorrect because you are describing SB 10, not SB 9. SB 9 indeed allows duplexes on all single-family parcels, as well as lot splits if one of the new homes will be owner-occupied, and neither lot would be less than 40% of the original lot's area.