Mercer Island planning commissioners set limits for short-term events, table final vote on temporary-use rules

The Mercer Island Planning Commission on June 10 agreed to narrow exemptions for short-term temporary uses and gave staff direction to draft revised permanent rules for temporary uses and structures, including outdoor dining, but tabled a final recommendation to the City Council until its July meeting.

The decisions came during a public hearing and a lengthy deliberation on proposed amendments to the Mercer Island City Code (MICC) that would replace interim rules adopted after the COVID-19 pandemic. Commissioners focused on three buckets of policy: brief exemptions for small events, a separate category for routine temporary uses that meet zoning standards, and a process for temporary deviations where uses or structures would exceed code limits.

“Once we get through the minor amendments, we can discuss the questions that were posed ahead of the March meeting for the temporary uses section,” said Molly (staff), the planner leading the presentation. The commission approved a package of minor edits and asked staff to return a consolidated draft for final action in July.

Why it matters: The draft rules affect when residents, businesses and community groups must obtain a temporary-use permit for tents, food trucks, outdoor dining and other short-term activities. The commission’s direction narrows permit requirements for fleeting events while creating a clearer path for longer-term or nonconforming temporary installations.

Most important outcomes and direction

- Short-term exemptions: Commissioners broadly supported language (referred to in the packet as log 23 and related direction) that would exempt uses or structures in the public right-of-way or on private property from many underlying development standards if the activity lasts less than one week during any three-month period. Staff was directed to draft that exemption so it applies to common, brief activities such as garage/yard/estate sales, lemonade stands and similar short events. Commissioner Gibson characterized the approach as “practical” for driveway tents and one-day food vendors.

- Size and frequency: The panel discussed several size formulas and limits (including a 120-square-foot tent cap tied to lot area and alternatives pegged to a fraction of lot size). Commissioners generally agreed the one‑week duration combined with a modest frequency limit (one week per three months) would prevent recurring long-term occupation while allowing typical short events. They left final tent-size language to staff to incorporate based on the consensus.

- Review types and renewals: Commissioners directed staff to treat “normal” temporary uses that conform to the underlying zone as a Type 2 land-use review (notice on the permit bulletin) rather than higher-level hearings. For temporary deviations (instances where a structure or use would exceed code limits), commissioners debated whether a Type 3 or Type 4 review is appropriate. There was no final agreement on the deviation review level; commissioners asked staff to prepare language that would allow a longer-term approval to be renewed (staff suggested a possible five-year renewal cycle with the option to renew up to a longer term) and to propose an expedited renewal mechanism for unchanged approvals.

- Housing/encampment and vehicles: Commissioners clarified that temporary encampments and vehicles are not treated the same as temporary structures under the draft — temporary housing encampments were excluded from the temporary-use category and vehicles are not considered a “structure” for the exemption.

What the commission voted on

- The commission approved several minor amendments to the draft ordinance (listed in the staff packet as logs 1, 10, 17, 21, 22 and 24). The secondary motion to approve those minor amendments passed in a roll call: Commissioner Perez — Aye; Vice Chair Gibson — Aye; Commissioner Cuse — Aye; Chair Thompson — Aye.

- A main motion to recommend the City Council adopt the overall set of proposed amendments was made during the meeting (mover: Commissioner Acuse; second: Vice Chair Gibson), but commissioners agreed to continue deliberations and table the final vote until the next regular meeting so staff can prepare a consolidated draft reflecting the policy buckets discussed.

Statements and context

- “If there is no further testimony, the public portion of this hearing is now closed as of 06:07PM,” Chair Dan Thompson said when the hearing portion received no public comments. Molly (staff) then walked commissioners through the matrix of log items and the staff proposal.

- Commissioners repeatedly stressed balancing flexibility for small community events against the need to protect single-family neighborhoods and comply with underlying land-use limits. Commissioner Perez said the draft should not be used to expand nonresidential commerce in residential zones, while Commissioner Gibson emphasized practicality for short-term, small-scale events.

Next steps

Staff will draft revised ordinance language reflecting the commission’s direction on short-duration exemptions, review types, renewal mechanics and other edits discussed on June 10. The Planning Commission will take up the consolidated draft at its next meeting (the commission indicated July 22 as the likely date), at which time it may vote on a recommendation to the City Council.