About Residential/Commercial Structures

"Closed construction" is a factory-built house, commercial structure, or component that is not open for visible inspection at the building site. It may enclose factory-installed structural, mechanical, electrical, plumbing, or other systems and equipment.

"Commercial structure" is a structure designed or used for human habitation (such as a dormitory) or human occupancy for industrial, educational, assembly, professional, or commercial purposes. It may also include a component.

"Factory-built housing" is housing designed for human occupancy such as a single-family dwelling. The structure of any room is entirely or substantially prefabricated or assembled at a place other than a building site. It may also include a component. A factory-built house is also referred to as a "modular" structure. Factory-built housing does not include manufactured (mobile) housing. (See RCW 43.22.450(3)).

See WAC 296-150F.

Forms related to residential/commercial structures.

NOTE: After occupancy of a factory-built residential/commercial structure, all inspections are done by the local enforcement agency.

Fees

Fees for residential / commercial structure alteration permits increased May 1, 2012.

We've also streamlined our fee system so it's no longer necessary for customers to calculate payments depending on the permit type.
View the new fees that went into effect May 1, 2012.

Note: These fees are for estimation purposes only. Please contact 360-902-5218 for a complete project estimate. (See WAC 296-150F-3000 for more about these fees.)