City attorney warns Temple City about revived SB450 changes to lot-split and duplex approvals

City Attorney Murphy told the council that Senate Bill 450, which addresses SB9 lot splits and duplexes, had been revived and was moving through committee. Murphy said two provisions are of particular interest to cities: (1) a 60-day deadline for approving or denying SB9 developments, and (2) a requirement that denials include a full explanation of deficiencies and how to correct them so applicants can resubmit with a path to approval.

Murphy and the League of California Cities warned that the 60-day processing window and the degree of required explanation could impose significant administrative burdens and costs on cities if applications proliferate, potentially requiring additional planner time. The bill also would constrain the use of objective standards that cities apply to developments, which the attorney said could be problematic where duplexes in single-family zones raise unique massing, lot-line, and other impacts.

Murphy said the League recommends cities consider drafting letters of opposition; he suggested one-on-one discussions and, if there is local interest, returning the matter on consent at a subsequent council meeting. Council members asked clarifying questions about the bill’s status; Murphy said he believed it remained in committee.

Next steps: City staff and council may consider a draft letter of opposition depending on interest; staff will monitor the bill’s progress in the Legislature and return with recommended next steps if requested.