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State of Washington Classified Job Specification


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Class Code: 395K
Category: Protective Services

Class Series Concept

See Factory Assembled Structures Inspector 1.


This is the journey-level of the series. Under general direction, positions inspect and approve the construction of all types of new and altered factory assembled structures involving structural systems, fire & life safety components (such as fire resistive construction and emergency exiting systems), accessibility, energy code, plumbing, fire sprinkler, electrical and heating & mechanical installations for compliance with state laws, regulations and national codes.

Typical Work

Conducts on site and plant inspections in an assigned geographic area of new constructions, alterations and modifications of factory built commercial structures, factory-built housing including tiny homes, manufactured and mobile homes, commercial coaches, recreational vehicles, park model Recreational Vehicles, conversion vendor units (food trucks and trailers), self-propelled mobile medical units and factory built temporary worker housing units;

Performs in-plant FAS inspections at out of state and out of country locations, including overseas when assigned;

Audits RV and Park Model RV factories to evaluate conformance with approved quality assurance programs and national construction standards;

Investigates RV, PMRV and manufactured home dealer lots to assure compliance with state law for labeling and certification;

Assists the FAS Senior/Specialist level for the Installer/ Housing and Urban Development State Administrative Agency/ HUD In-Plant Inspection Agency program with inspections, investigations and audits of manufactured home factories, dealers, installers and for consumers to assure compliance with federal regulations for manufactured homes;

Assists in training new inspectors in enforcement and interpretation of applicable national codes and state laws and regulations;

Functions as liaison between contractors, manufacturers, engineers, other interested parties and the Department;

Acts as intermediary when conflicting opinions exist and/or the need for an on site interpretation arising in the daily enforcement of codes, rules and regulations;

Conveys and explains changes and interpretations in laws and regulations to program stakeholders;

Attends continuing education training to stay current on professional licenses and certifications. Stays current on knowledge in relevant fields of building technology;

Checks individuals engaged in electrical contracting and plumbing installations for licensing, registration, and certifications in conformance with state law;

Performs staff and stakeholder training;

Performs other work as required.

Knowledge and Abilities

Knowledge of: Washington State laws and regulations and national codes covering manufactured and mobile homes, factory built commercial buildings, factory built housing, commercial coaches, RV’s, PMRVs, conversion vendor units, mobile medical units, and factory built temporary worker housing units; electrical installation, contractor registration, and plumber certification; related Attorney General opinions; standard construction requirements for structures and fire resistive assemblies; standard practices, methods, materials, tools and equipment used in electrical, plumbing, fire sprinkler, heating, and ventilation installations; safety precautions and techniques.

Ability to: read and interpret blueprints for compliance with code application, rules and regulations; explain technical requirements to lay persons; meet and deal effectively with others; explain laws and regulations of plumbing and electrical journeyman procedure requirements or laws and regulations on contractor’s registration requirements; oversee and coordinate work of others; analyze construction problems in structural, fire rated construction, electrical, plumbing, fire sprinkler, heating and ventilation installations in manufactured and mobile homes, factory built housing and commercial structures, commercial coaches recreational vehicles, park model RVs, conversion vendor units, mobile medical units and factory built temporary worker housing and in building and construction installations, modifications and alterations of all types; secure and develop cooperation of individuals and groups in promoting safe practices; obtaining compliance with applicable codes; prepare clear and concise reports.

Legal Requirement(s)

There may be instances where individual positions must have additional licenses or certification. It is the employer’s responsibility to ensure the appropriate licenses/certifications are obtained for each position.

Desirable Qualifications

Five years’ experience:

At journey level in building construction trades/craft(s) such as a licensed plumber or electrician.


As a residential building inspector with a governmental jurisdiction or supervisor of building construction.


As a supervisor of building construction in the manufacture or inspection of manufactured homes, factory built commercial buildings, commercial coaches, factory-built housing, recreational vehicles, park model RVs, conversion vendor units, mobile medical units or factory built temporary worker housing.

College training in structural, electrical or mechanical engineering, architecture or construction management may be substituted, year for year, for a maximum of two years of the above five years’ experience.

Certification by the International Code Council as a building inspector.

Class Specification History

New class adopted June 22, 2023, effective July 1, 2023.