What are the building setback requirements in Mason County, Washington?

Minimum building setbacks in Mason County are: front yard: 20 ft, side yard: 5 ft, rear yard: 20 ft. Requirements may vary by zoning district.

What are the fence height limits in Mason County?

Contact the county planning department for fence regulations.

How can I find my property lines in Mason County?

You can visualize your property boundaries using ParcelVision, an AR app that shows property lines on your iPhone. For legal purposes or before construction, hire a licensed surveyor.

Mason County, Washington Property Laws

Building setbacks, fence regulations, and zoning requirements for Mason County.

Building Setbacks in Mason County

Setback requirements determine how far structures must be from property lines. These minimums apply to most residential construction in unincorporated Mason County.

Front Yard

20 ft

Side Yard

5 ft

Rear Yard

20 ft

Accessory Structures

5 ft

Front yard may be reduced to 10 feet on cul-de-sacs. Storage sheds ≤120 sq ft may be setback 5 feet. Street side yard requires 10 feet. Setbacks vary by zoning district.

Source: 17.11 (Residential Zoning Districts in Allyn UGA)

See Your Property Lines in Mason County

Walk your land and see the boundaries appear in AR. Know exactly where setbacks apply.

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Disclaimer: This information is extracted from Mason County ordinances for reference only. Regulations vary by zoning district and may have changed. Contact the Mason County Planning Department for official guidance before building.

Last updated: May 2026