Understanding Unpermitted Sheds in Washington State: A Comprehensive Guide
In Washington State, the construction of a shed, regardless of its size, typically requires a building permit. However, there's a common misconception about the largest shed that can be built without a permit. This article aims to clarify this issue and provide a comprehensive understanding of the regulations surrounding unpermitted sheds in Washington State.
Washington State's Building Code and Sheds
Washington State follows the International Building Code (IBC), which sets the standards for construction. According to the IBC, any structure that exceeds 200 square feet in floor area requires a building permit. This includes sheds, regardless of their intended use.
What About Sheds Under 200 Square Feet?
You might be wondering, "What about sheds under 200 square feet? Can they be built without a permit?" The short answer is yes, but there are conditions. The shed must be used for storage purposes only and must not contain plumbing, electrical, or mechanical systems. Additionally, the shed must comply with all setback requirements and other zoning regulations.

Important Considerations for Sheds Under 200 Square Feet
- Setbacks: Ensure the shed maintains the required setbacks from property lines and other structures.
- Height: The shed's height should not exceed 10 feet or be higher than any adjacent structure.
- Foundation: While not required by code, a foundation can help prevent the shed from shifting or settling over time.
Why Get a Permit Even for Smaller Sheds?
While it might be tempting to skip the permit process for a small shed, there are several reasons why it's a good idea to obtain one:
- Ensures your shed complies with all building codes and zoning regulations.
- Provides a record of the shed's construction, which can be beneficial if you decide to sell your property.
- Protects your investment by ensuring the shed is safe and structurally sound.
What Happens if You Build Without a Permit?
Building without a permit can lead to several consequences. The local building department may order the shed to be removed, and you could face fines or penalties. Moreover, if the shed is found to be non-compliant with building codes, you may be required to bring it up to code, which can be more costly than obtaining a permit in the first place.
When to Consult a Professional
If you're unsure about whether your shed project requires a permit or if it complies with all regulations, it's always a good idea to consult a professional. A licensed contractor or building inspector can provide guidance tailored to your specific situation.

Conclusion
While it's true that Washington State allows for the construction of sheds under 200 square feet without a permit, it's crucial to understand the conditions and requirements that apply. Always err on the side of caution and ensure your shed project is in compliance with all building codes and zoning regulations. This will not only protect your investment but also ensure the safety and structural integrity of your shed.























