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Shoreline adopts development code and zoning map updates, including ADU size, tree-retention and hardscape limits
Summary
Shoreline’s City Council adopted Ordinance 1027 on Jan. 13, 2025, updating the zoning map and amending the development code to implement the 2024 comprehensive plan, including changes to ADU size, tree-retention targets and maximum hardscape limits.
The Shoreline City Council on Monday adopted Ordinance 1027, approving the updated zoning map and a package of development-code amendments intended to implement the city’s 2024 comprehensive plan and state law changes (including middle-housing requirements).
The ordinance and its associated attachment(s) include a substantial set of changes and multiple council amendments adopted during the meeting. Key outcomes adopted by the council include:
- ADU size: Council raised the maximum size for accessory dwelling units from 1,000 to 1,200 square feet in the NR1–NR3 residential zones, and clarified counting rules so a property may total up to three dwelling units under the code (primary plus ADUs) depending on zoning allowances.
- Density and bonuses: Council adopted language to treat ADUs as units that count toward maximum density; a separate amendment clarified that the maximum unit count is…
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