Mercer Island Council directs staff to speed up land‑capacity analysis, alignment with state TOD law

The Mercer Island City Council on Jan. 16 instructed staff to accelerate work to comply with a Growth Management Hearings Board order that found parts of the city’s 2024 comprehensive plan did not fully meet state requirements for planning for affordable housing. Council members also asked staff to analyze compliance with House Bill 14 91 — the state’s transit‑oriented development (TOD) law — at the same time, citing overlap between the two sets of requirements.

The move follows a presentation by the city’s planning team, which said the GMHB remanded four issues—land capacity, adequate provisions for affordable housing, a required transit‑station sub‑area plan, and anti‑displacement measures—while denying two other appeals. Staff told the council Mercer Island’s 20‑year housing target assigned by King County was 1,239 units and that the board has asked the city to show capacity and adequate provisions by affordability band, not only in aggregate.

Why it matters: the GMHB set a July 31, 2026 deadline for Mercer Island to finish work responding to the remand. Staff and the council described the timeline as compressed and requiring tradeoffs, additional staff/consultant capacity, and prompt community engagement. The council’s motions provide staff direction to gather data, test compliance approaches that also address HB 14 91 requirements (which include an average 3.5 floor‑area ratio in station areas, multifamily tax‑exemption [MFTE] and inclusionary zoning, and reduced parking requirements), and bring maps, analyses and draft policy options back in February–March.

What the council approved: by roll call the council approved a set of study‑direction motions. One directs staff to revise the land capacity analysis to disaggregate capacity by affordability band and to analyze feasibility (including whether accessory dwelling units and recent middle‑housing changes should be counted, and market feasibility of deeply affordable units). A second motion asked staff to pursue an integrated compliance path addressing the GMHB order and HB 14 91 and to return in February with initial findings; a third motion confirmed guidelines staff should use to craft a modified station‑area boundary for the light‑rail station (exclude parks/open space and the I‑90 corridor; remove noncontiguous parcels; align to city streets where possible; defer to existing zoning lines where streets aren’t logical) and asked staff to return a draft map.

On affordable housing tools, staff presented a menu (MFTE, permit fee reductions/waivers, reduced parking, fee‑in‑lieu, and inclusionary zoning) and asked council permission to analyze these and other adequate‑provision options. The council also approved motions to: (a) develop a workplan to implement housing‑element policies and anti‑displacement measures and return in February, and (b) study direct‑delivery opportunities (fee‑in‑lieu programs, partnerships such as ARCH, a housing fund, and potential direct investments) with a preliminary report due in March.

Council discussion focused on practical limits and tradeoffs. Planners said the city had taken actions during the 2024 update (changes to Town Center heights and an inclusionary percentage) to reach aggregate capacity but the GMHB found the city had aggregated across affordability bands in a way that must now be disaggregated and explained. Council members pressed staff on whether the most deeply affordable units (0–30% AMI, including permanent supportive housing) are likely to be delivered under current zoning and incentives, and how fee‑in‑lieu revenues would be counted for the city’s target if those funds are used in projects outside Mercer Island.

What happens next: staff said they had retained a consultant for the land‑capacity work last year and that initial analysis will be available soon; they plan to bring a more complete analysis in February, run planning‑commission review in April–May, and return to council this summer so the city can meet the July compliance deadline. Any modified station‑area boundary will require Department of Commerce approval and a public comment period, staff stressed.

Representative quotes:
"The order says, the city, you did not go far enough," City Manager Jessie Baughn said of the GMHB decision.
Planning Director Jeff Thomas: "We'll need to analyze residential land capacity specifically through this affordability lens and look for gaps between capacity and assigned needs."
"The 2026 July 31 deadline is certainly going to require the city to work with expediency," Adam Zach, principal planner, told the council.

The council did not adopt ordinances or change code at Tuesday’s meeting; it provided direction to staff for analysis and public outreach and set a schedule for further review and decisions.