Mount Pleasant leaders debate overlay zoning, ask staff to draft MHDR changes with 20‑foot buffer

Mount Pleasant leaders spent a work session debating proposed overlay zoning that would allow higher‑density housing in parts of town while giving the council discretion to approve specific plans.

Planning staff opened the session by describing two informational sheets comparing overlay zoning and base (traditional) zoning and by saying the overlay tool is intended to “give the council and the city more…control over how and where this type of density could be granted,” not to automatically rezone properties (Speaker 6).

Why it matters: an overlay can allow a developer to propose smaller, denser lots inside a contained project while requiring an application, plan, traffic analysis and development agreement that condition what uses are permitted. Staff stressed that overlays are legislative decisions subject to council discretion: even if an applicant checks required boxes, the council may still deny an overlay if it finds adverse effects on public health, safety or welfare (Speaker 6).

Key disagreements: commissioners and members discussed the MHDR draft’s minimum‑area threshold and neighborhood protections. Staff said the MHDR as drafted used a half‑acre minimum application area, and several councilors worried a half‑acre threshold would permit small, distributed infill that changes the character of older neighborhoods. Commissioners floated raising the minimum to one acre or more; other options included requiring a larger overall minimum acreage for an application while allowing smaller internal lots within that project (Speakers 6,9).

Setbacks and buffers were another focus. Staff described an approach in which internal lots could have smaller setbacks between structures but the overlay would require a protective buffer between the new development and existing residential parcels. Councilors suggested a buffer of 20 to 30 feet and stronger screening requirements; staff offered to draft options including a 20‑foot buffer and to provide alternatives for fencing (Speaker 6).

State context and accessory dwellings: several participants observed that recent or pending state code changes make accessory dwellings and smaller units easier to place by right. Councilors said that until local code is fully updated the city’s ability to restrict some state‑authorized units will be limited, which strengthens the case for clarifying local overlay rules (Speakers 2,8).

Process and public input: staff explained overlays would follow the standard zone‑change process—public hearings before planning and then council—and that required application materials (site suitability, infrastructure, traffic studies, neighborhood compatibility) would be submitted up front rather than after a preliminary approval (Speaker 6).

What comes next: staff agreed to draft MHDR revisions that increase the application minimum area options, specify a 20‑foot buffer around overlay projects, include design and fencing options (including a version that prohibits chain‑link), and return with those options to planning and zoning and the council for further direction (Speaker 6). Staff also said they have prepared an estimate to develop a future land‑use map with community input and will present that estimate to the council (Speaker 6).

Quotes: “It doesn't automatically rezone any property,” said Speaker 6, summarizing the staff position on overlays. Developer Speaker 4 told the group that overlays are “absolutely the best tool” for controlling development when the council wants to ensure design and affordability.

The work session ended with staff asked to prepare revised code language and engagement options; no formal vote was taken.