ADU Regulations in Marysville, Washington
In Snohomish County north of Everett, Marysville permits ADUs under Washington's HB 1337 which limits local restrictions. The city's growing residential neighborhoods welcome accessory units by right.
Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Marysville as of 2026. Regulations are governed by Washington's HB 1337 (2023) which limits local ADU restrictions statewide.
| Regulation | Requirement |
|---|---|
| Maximum Size | 1,000 sq ft |
| Property Setbacks | 5 ft rear, 5 ft side |
| Extra Parking Required | Not required (near transit) |
| Owner Occupancy | Not required |
Additional Local Requirements for Marysville
- ADU by right in residential zones
- Minimum 200 sq ft
- WA HB 1337 limits local restrictions
📥 Download the Complete Marysville ADU Cheat Sheet
Get the step-by-step permit checklist, official government forms, direct planning department contacts, and estimated fees — all in one printable PDF for Marysville, Washington.
Download the Complete Marysville ADU Cheat Sheet — $12Frequently Asked Questions About ADUs in Marysville
Can I build an ADU in Marysville?
This Washington city follows HB 1337 which limits local ADU restrictions. Parking may be waived near transit.
How big can my ADU be in Marysville?
What is the maximum ADU size allowed in Marysville? ADUs in Marysville can be up to 1,000 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Marysville planning department before designing your project.
What about setbacks and other requirements in Marysville?
What are the setback requirements for an ADU in Marysville? ADUs in Marysville generally require setbacks of 5 ft rear, 5 ft side. California state law (AB 68) limits local setback requirements to 4 feet for existing structures, but always verify with local zoning.
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