St. Charles County staff outline legal limits, timeline and public engagement for master plan update

St. Charles County officials told the County Council at a work session that the county’s master plan is a policy guide meant to inform zoning decisions but is not the law that controls land use.

The council heard a legal overview from acting County Counselor Roland Sullivan and a planning presentation from county staff laying out the update process for what staff called Vision 2035, public engagement completed so far and options for applying natural-constraints mapping and “creative development” tools.

Sullivan opened the legal portion by saying, “I'm Roland Sullivan, I'm the acting County Counsellor … the master plan is to set forth the policy regarding the social, governmental, economic, and physical development of the county, and it includes … recommendations.” He emphasized courts treat the master plan as guidance rather than a zoning regulation and noted the plan must be reviewed at least every five years.

Why it matters: the county’s zoning ordinance and zoning map are the legal instruments that set property-specific rules. Sullivan told the council that the master plan is “one of the factors” to consider when deciding whether a zoning change is reasonable, but it does not control land use by itself.

County planning staff described progress on the update and how the plan will be used. “We’re in the middle of the master plan process for updating the current plan,” a county planner said, noting an existing plan (Envision 2030, adopted in 2019) and the work to draft Vision 2035. Staff told the council the master plan update will be completed this year and that a rewritten Unified Development Ordinance (UDO) is scheduled for 2026.

Staff summarized the technical basis for land-use recommendations: natural constraints (floodplain, slopes, soils, tree canopy), availability of sanitary sewer and utilities, and transportation infrastructure. The planners showed layered maps and urged using overlays of slopes, floodways and canopy to identify where different densities or design approaches are most appropriate.

On implementation and options, planning staff presented a “creative development”/cluster model — illustrated by two diagrams showing the same number of housing units arranged differently so that more open space is conserved while development density is preserved. A council member asked how clusters would work where existing lots are large; staff replied that clustering typically uses smaller lots clustered near each other with the remainder of land preserved by deed restriction or conservation easement.

Public engagement and timeline: staff said the master plan steering committee (16 members: 11 citizens, two executive staff, two council members and one staff representative required by charter) has met four times; the existing-conditions memo is posted on the project website; nearly 600 people completed the online questionnaire; 9–10 focus groups were held; and a visioning workshop drew more than 50 participants. Staff reported “more than 700 people” participated in outreach activities overall.

Next steps and council direction: staff said they will continue drafting the future land use map and the plan’s implementation measures and return to council for adoption. They flagged two near-term deliverables: (1) the master plan document for council consideration this year and (2) the Unified Development Ordinance rewrite to follow in 2026.

Council discussion threaded policy, legal and practical concerns: several council members pressed staff on how the county’s plan interacts with municipal plans, why developers sometimes prefer annexation into cities, and how the master plan can be used earlier in the review process so applicants know whether a proposal is likely to be supported. Staff said they are coordinating with municipal staff and will mirror municipal future land-use maps where appropriate.

Ending note: staff and the acting county counselor repeatedly stressed the legal distinction between guidance (the master plan) and binding law (the zoning ordinance and zoning map) while laying out technical options — from layered constraints mapping to UDO revisions and cluster/creative-development approaches — the county could use when implementing the plan.