Home Business in Mason County, WA (2026)
3 rules for unincorporated Mason County, Washington.
Verified from official government sources
Signage Rules
Mason County Code § 17.03.021(5) limits a home-based cottage industry in unincorporated Mason County, WA to a single sign no larger than twelve square feet, and bars any other exterior change to the building or property that looks inconsistent with its residential use. A larger or additional sign forfeits the business's by-right cottage industry status.
Home Business Sign Size Limit in Mason County, WA
Light RestrictionsMason County Code § 17.03.021(5)
Unless listed in Figure 17.03.021, any use is permitted, subject to department review, in any development area as a home-based occupation, or as a cottage industry. The activity shall be required to obtain a special use permit unless it complies with the following standards: ... (5)There shall be no alterations to the outside appearance of the buildings or premises that are not consistent with ...
Customer Traffic Restrictions
Cottage industries in unincorporated Mason County, WA must accommodate up to ten on-site parking spaces for residents, customers and employees combined, and Community Development will not treat the use as a by-right home occupation if it raises local traffic by five percent or more. Additional parking beyond ten spaces requires its own special use permit under the Mason County Code.
Home Business Customer Traffic Limits in Mason County, WA
Some RestrictionsMason County Code § 17.03.021
Unless listed in Figure 17.03.021, any use is permitted, subject to department review, in any development area as a home-based occupation, or as a cottage industry. The activity shall be required to obtain a special use permit unless it complies with the following standards: (1)On-site parking shall be accommodated for up to ten vehicles for residents, customers and employees; any provision for...
Home Daycare
Unincorporated Mason County allows a family child care center, in-home care for children by a resident of the dwelling and licensed under WAC 388-150, as a listed use in its own zoning code. The Shelton urban growth area's Neighborhood Residential district names it a permitted use outright at Mason County Code § 17.07.120(F); the Allyn UGA residential district lists it as a permitted accessory use to a single-family home at § 17.11.130(4).
Family Child Care Center Zoning, Mason County
Light RestrictionsMason County Code §§ 17.06.010, 17.07.120(F), 17.11.130(4)
"Child care center, family." "Family child care center" means an establishment providing for regularly-scheduled care, supervision and protection of children for periods less than twenty-four hours, in a dwelling, where such care and supervision is provided by a resident of the dwelling, and where no nonresident is regularly employed. Such establishment shall be subject to licensing and regulat...
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