Building a Shed in Monroe? Here's What You Need to Know

Monroe sits at the gateway to eastern Snohomish County where the Skykomish River valley opens up toward the Cascades. Sheds under 200 square feet are permit-exempt under the IRC as adopted by Monroe — no footings or permanent foundation, one story, non-habitable. But you still need to meet all zoning setback and lot coverage requirements for your specific zone. Monroe's setbacks vary by district, so check with the Planning Department to confirm what applies to your parcel.

Building Codes & Permits in Monroe

Shed Permit RulesCity of Monroe
Max Shed Size (No Permit)200 sq ft (one-story, detached, no footings)
Max Shed Height (Overall)Per zoning district — check MMC 22.16.040
Setbacks (Side/Rear)Per zoning district — check MMC 22.16.040
Setbacks (Front)10 ft to living area, 20 ft to garage (MMC 22.16.040)

Monroe adopts the 2021 IRC. Permit-exempt sheds must be one-story, detached, uninhabitable, with no permanent foundation and floor area of 200 sq ft or less.

Setback and height requirements vary by zoning district. Contact Monroe Planning at 360-863-4501 to confirm your zone.

From the Municipal Code

Under the 2021 International Residential Code, in the City of Monroe, you may build a detached, uninhabitable residential storage shed with a floor of 200 square feet or less and is not considered a permanent structure (with no footings, etc.) without a permit. However, there are still specific setback requirements from the property line.

Monroe FAQ — Shed Permit Exemption

What You Need to Know

  • 200 sq ft exempt (City FAQ): Under the 2021 IRC as adopted by Monroe, you may build a detached, uninhabitable storage shed of 200 sq ft or less without a building permit — provided it has no permanent foundation (no footings) and is one story.
  • Setbacks vary by zone (MMC 22.16.040): Monroe's setback requirements depend on your zoning district. Contact the Planning Department at 360-863-4501 to find out what applies to your parcel.
  • Front setback (MMC 22.16.040): The standard front yard setback is 10 feet to living area and 20 feet to a garage. Sheds should be placed in rear or side yards.
  • Lot coverage: Even exempt structures count toward your zone's maximum lot coverage. Check your zone for the specific percentage.
  • Outside city limits? If your property is in unincorporated Snohomish County rather than within Monroe city limits, Snohomish County rules apply instead.
  • Utilities: Even if the structure is exempt, any electrical or plumbing work requires a separate trade permit.

Have questions about permits or zoning? We don't have all the answers, but we deal with this stuff regularly and can usually help you figure it out. Reach out with your address and we'll point you in the right direction.

Building codes and permit requirements are subject to change. Contact your local building department to verify current regulations before beginning your project.

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