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Washington State Department of Labor & Industries:
Department of Labor & Industries
PO Box 44000
Olympia WA 98504-4000
L&I headquarters – Tumwater
7273 Linderson Way SW
Tumwater WA 98501-5414
Application For Construction Contractor Registration: Pay the registration fee of $113.40
Application for Electrical Contractor’s License: Application fees. $319.20 total.
Licensed Elevator Contractor (LC) Application: Pay the exam fee of $193.60
Application for Master Electrician Certification Examination: $160.60
Application for Pump Installer Combination General Contractor Registration and Electrical Contractor
License: Contractor Registration Portion 2 Years $113.40
Electrical Contractor License Portion 2 Years $277.60
Administration/Master Assignment or Transfer Assignment or Transfer $41.60
Total Due $432.60
Exam Applicants $151.90 per exam
• Journey Level
• Residential Specialty
• Medical Gas
(1)(a) “Contractor” includes any person, firm, corporation, or other entity who or which, in the pursuit of an independent business undertakes to, or offers to undertake, or submits a bid to, construct, alter, repair, add to, subtract from, improve, develop, move, wreck, or demolish any building, highway, road, railroad, excavation or other structure, project, development, or improvement attached to real estate or to do any part thereof including the installation of carpeting or other floor covering, the erection of scaffolding or other structures or works in connection therewith, the installation or repair of roofing or siding, performing tree removal services, or cabinet or similar installation; or, who, to do similar work upon his or her own property, employs members of more than one trade upon a single job or project or under a single building permit except as otherwise provided in this chapter.
(b) “Contractor” also includes a consultant acting as a general contractor.
(c) “Contractor” also includes any person, firm, corporation, or other entity covered by this subsection (1), whether or not registered as required under this chapter or who are otherwise required to be registered or licensed by law, who offer to sell their property without occupying or using the structures, projects, developments, or improvements for more than one year from the date the structure, project, development, or improvement was substantially completed or abandoned. A person, firm, corporation, or other entity is not a contractor under this subsection (1)(c) if the person, firm, corporation, or other entity contracts with a registered general contractor and does not superintend the work.
What are the definitions of the specialty contractor classifications for the purpose of contractor registration only?
(1) “Appliances, equipment”—A contractor in this specialty installs or replaces appliances where minimal gas and water connection are required, such as a refrigerator with an icemaker, gas clothes dryer, gas cook top, gas oven or other similar appliances and only from the existing shut off at wall or floor to the appliance or an appliance that becomes a fixed part of a structure (use of flex for the connection is limited to six feet or less). The installation or replacement of dishwashers, hot water tanks, and garbage disposals requires a plumber certification per chapter 18.106 RCW and/or an electrical license per chapter 19.28 RCW.
(2) “Asbestos and lead”—A contractor in this specialty cleans, handles, repairs, removes, encapsulates, encloses, hauls and disposes of paper or hard block insulation on hot water piping, heating ducts, or as molded pipe fitting insulation and joint compounds on furnaces or floor tiles, sheet flooring, ceiling tiles and acoustical (stucco) finishes or as wall and attic insulation materials, or for shingles or siding material and cement pipes for interior or exterior asbestos or lead products. All asbestos contractors shall adhere to state (DOSH) and/or federal (OSHA) standards regulating all forms of this hazardous material. Asbestos certification per chapter 296-65 WAC is required. Lead abatement certification for workers may be required per chapter 70.103 RCW.
(3) “Awnings, canopies, patio covers and exterior screens”—A contractor in this specialty installs and repairs window awnings, door hoods, exterior screens, freestanding or attached canopies, and patio covers constructed of metal, fabric, fiberglass, and plastic.
(4) “Boiler, steam fitting, process piping”—A contractor in this specialty installs, services and repairs power boiler installations and hot water heating systems, including fire-tube and water-tube steel power boilers and hot water heating low pressure boilers, steam fitting and piping, fittings, valves, gauges, pumps, radiators, convectors, hydraulics, fuel oil tanks and fuel oil lines. Also includes chimney connections, flues, refractories, burners, thermal insulation, and accessories, fuel and nonpotable water lines from source of supply to boilers; process and specialty piping and related equipment, pneumatic and electrical control, sheet insulation and all other equipment, including solar heating equipment associated with these systems. Work in this specialty may also require plumber certification per chapter 18.106 RCW and/or an electrical license per chapter 19.28 RCW.
(5) “Cabinets, millwork and finish carpentry”—A contractor in this specialty installs cabinets, countertop frames, cases, sashes, doors (including hardware), trims, nonbearing partitions, closets and other items of finish carpentry by cutting, surfacing, joining, gluing, and framing wood and wood products. Also places, erects, fabricates and finishes such cabinets and millwork in structures, including the cutting, framing, installation and finishing of wood and wood products, such as prefabricated cabinets and millwork.
(6) “Central vacuum systems”—A contractor in this specialty installs, modifies, or repairs central vacuum systems, pneumatic tube dispatching systems or any other type of pipeline which operates systems of reduced pressure for industrial and residential cleaning. (This specialty does not include any medical or hazardous waste systems.)
(7) “Closets”—A contractor in this specialty installs, repairs and maintains the lateral or horizontal shelving systems, racks, rails, or drawers involved in a closet or storage system.
(8) “Commercial/industrial refrigeration”—A contractor in this specialty installs, alters, and repairs refrigeration equipment and systems used for processing, storage, and display of food products and other perishable commodities for the control of air temperatures below fifty degrees Fahrenheit. This allows construction, fabrication, erection, installation, service, maintenance and repairs of devices, machinery and units, including refrigerators, refrigerated rooms, air-conditioning units and insulated spaces. Also includes installation of any related insulation, ducts, blowers, registers, controls over humidity and thermostatic controls for the control of air, liquid, and/or gas temperatures below fifty degrees Fahrenheit or ten degrees Celsius. Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(9) “Concrete”—A contractor in this specialty completes all work in connection with the processing and placing of concrete composed of materials common to the concrete industry, including finishing, coloring, curing, repairing, testing, drilling, sawing, grinding, chipping, and grouting. Placing film barriers, sealing, and waterproofing are included. The construction, centering, and assembling of forms, molds, slip forms, and pans. Reregistration is not required for companies who provide concrete pumping services or delivery of materials only.
(10) “Construction clean-up”—A contractor in this specialty cleans up and/or removes from buildings, grounds or structures any debris resulting from any construction project including but not limited to: Concrete, plaster, drywall, any paint or adhesive products from windows, floors, ceramic tile and bathroom fixtures. (Registration is not required for janitorial services, i.e., at final cleaning.)
(11) “Demolitions and salvage”—A contractor in this specialty is involved in the wrecking of existing structures intended for disposal or salvage, by use of tools, equipment or explosives, and the raising, cribbing and underpinning of buildings and other structures so the alterations, repairs and temporary structures may be constructed under the retained and undisturbed portion of the building or other structures. Includes the erection of temporary ramps, barricades, and pedestrian walkways when required for demolition/wrecking and/or salvage projects. (This specialty does not include the alterations, additions, repairs or rehabilitation of the permanently retained portions of such structures.)
(12) “Doors, gates and activating devices”—A contractor in this specialty installs, modifies or repairs all types of residential, commercial or industrial doors including sliding door assemblies. This includes but is not limited to: Wood and screen doors, metal-clad doors, glass sliding/stationary doors and frames, automatic revolving doors, hospital cubical doors and related installations. Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(13) “Drain cleaning and snaking”—A contractor in this specialty can perform camera examination, cleaning or snaking of building drainage and vent pipes and/or sewer pipe. Nothing in this specialty is intended to waive any plumbing certification requirements of chapter 18.106 RCW or any local enforcement agency code provisions or allow for the removal, installation or replacement of any damaged plumbing parts or fixtures.
(14) “Drilling, blasting and soil sampling”—A contractor in this specialty does core and post hole drilling, horizontal drilling (no piping) and drilling for placement of charges and performing blasting work and performs soil sampling. (Does not include water well drilling.) Work with explosives requires licensing per chapter 70.74 RCW.
(15) “Drywall”—A contractor in this specialty lays out and installs gypsum wall board and gypsum wall board assemblies including nonstructural metal framing members, and performs the taping, primer and texturing operations including the application of compounds that adhere to wall board to produce a continuous smooth or textured surface. Includes interior lath and plaster repair.
(16) “Electrical”—Please see chapter 19.28 RCW.
(17) “Elevator”—A contractor in this specialty installs, repairs, alters, relocates, demolishes and maintains elevators and other conveyances, including all associated equipment and equipment associated with the safe and efficient installation and operation of electrical, hydraulic and manual operated elevators. Work in this specialty may also require elevator licensing per chapter 70.78 RCW and/or an electrical license per chapter 19.28 RCW.
(18) “Excavation, grading and land clearing”—A contractor in this specialty digs, moves and alters materials forming the surface of the earth by digging, horizontal boring, trenching, grading, or compacting the material for a cut, fill, grade, or trench, with hand and power tools, machines and explosives. Included is the placement of shoring, the oiling of base materials, and incidental blasting and drilling. (This specialty excludes excavating for water, gas, and oil wells.) Use of explosives requires licensing per chapter 70.74 RCW.
(19) “Fencing”—A contractor in this specialty constructs, erects, alters, or repairs all types of fences, corrals, runs, railings, cribs, game court enclosures (excludes roof), guard rails and barriers, backstops, posts, flagpoles, and gates. This includes installing, cutting, shaping, fabricating and repair of metal and wood fencing, cattle guards and supplemental materials. (This specialty excludes masonry walls.) Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(20) “Fireproofing and coating”—A contractor in this specialty applies by industry accepted practices independently qualified fireproofing and coating materials that are fire resistant.
(21) “Fire protection”—A contractor in this specialty lays out, fabricates, repairs and installs all types of fire protection systems, including all the equipment associated with these systems using water, steam, gas or chemicals. Systems may include the following areas of work and related equipment: Restaurant hood protection systems; fire pumps and drivers; pressure and storage tanks; all piping and valves; sprinkler heads and nozzles; and application of materials for the prevention of corrosion or freezing. Work in this specialty may also require an electrical license per chapter 19.28 RCW and/or fire-protection licensing.
(22) “Floor covering and counter tops”—A contractor in this specialty installs, repairs or replaces floor covering materials and related accessories including preparation of the surface to be covered. Included are: Linoleum, carpets, carpet backings and pads, and materials manufactured of asphalt, wood, vinyl, laminates, rubber and material common to the industry installed for sanitary and decorative purposes for nonstructural bearing interior and exterior use. Excludes work outlined in subsection (56) of this section. Work in this specialty may also require plumber certification per chapter 18.106 RCW and/or an electrical license per chapter 19.28 RCW.
(23) “Framing and rough carpentry”—A contractor in this specialty performs any form work, framing or rough carpentry necessary to construct framed structures; installs or repairs individual components of framing systems and performs any rough carpentry or associated work, including but not limited to the construction or installation of: Subflooring, siding (flat work only), decks, exterior staircases, new exterior doors and railings, fascia, roof decking, truss members and rafters, and sheathing using carpenter hand tools and power tools.
(24) “Glass and glazing”—A contractor in this specialty selects, cuts, assembles, and/or installs, replaces and repairs all makes and kinds of glass, glass work, mirrored glass, and glass substitute materials for glazing; executes the installation and glazing of frames, panels, sashes, skylights and glass doors; and/or installs these items in any structure. Also includes the installation of steel and aluminum glass holding members, glass products, and related hardware, as well as standard methods of weatherproofing, caulking, glazing, sealants, and adhesives.
(25) “Gutters and downspouts”—A contractor in this specialty installs, repairs, and maintains gutters and exterior downspouts of metal, wood, and plastic and channel devices common to the industry, for the use of water run-off of the exterior of a building.
(26) “Handyman”—A contractor in this specialty must be an individual who does all work personally without employees or other specialty contractors. A handyman may perform more than one unrelated specialty trade or craft provided they do all work themselves. All work shall be limited to minor and casual work of existing residential maintenance and repair with a total dollar value of time and materials under two thousand dollars. Work requiring a building permit may not be done by this specialty. If the registered contractor is a corporation or limited liability company (LLC), one person must be identified as a handyman. Work in this specialty may also require plumber certification per chapter 18.106 RCW and/or an electrical license per chapter 19.28 RCW.
(27) “House moving”—A contractor in this specialty raises, lowers, cribs, underpins, and moves structures, including their foundations. (This specialty does not include the alterations, additions, repairs or rehabilitation of such structures.)
(28) “Heating, ventilation, air-conditioning and refrigeration (HVAC/R)”—A contractor in this specialty fabricates, installs, services, and maintains equipment for the purpose of heating and cooling of indoor air. Systems may include the following areas of work and related equipment using industry accepted materials: Duct work; air filtering devices; water treatment devices; pneumatic controls; control piping; thermal and acoustical insulation; vibration isolation materials and devices; liquid fuel (propane) piping and tanks; gas piping from service connection to equipment it serves; and stainless steel kitchen systems. Includes the testing and balancing of the air handling systems. Also includes systems that utilize solar energy. Work in this specialty may also require electrical licensing per chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW.
(29) “Industrial equipment/machines”—A contractor in this specialty installs all industrial machinery such as generators, compressors and processors which are bolted or otherwise attached so as to be permanently affixed to a structure. Work in this specialty may also require an electrical license per chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW.
(30) “Institutional equipment, stationary furniture, lab tables, lockers”—A contractor in this specialty installs, alters and repairs equipment and furniture that become a fixed part of the structure, such as stationary desks, lockers, chalkboards, shelving, storage, seats in an auditorium (including stationary bleachers) and equipment used in a stage or gymnasium. Work includes the installation, alteration and repair of institutional kitchen equipment and laboratory equipment, such as stationary counters and tables, shelving partitions, and such other equipment as is generally accepted for use as commercial building accessory.
(31) “Insulation and acoustical”—A contractor in this specialty installs, alters, and repairs insulation materials used for the nonmechanical control of heat, sound, and moisture for use in the construction of structures and equipment. Work includes installation methods and devices such as supports, fastening systems, adhesives, mastics, plastics, weather-stripping and material used for the preparation of insulation work and common to the industry. Also includes application and installation of materials to protect or finish insulated surfaces.
(32) “Irrigation sprinkler systems”—A contractor in this specialty installs, repairs, and maintains sprinkler systems to distribute water for the purpose of irrigation, dust and soil erosion control using equipment, materials, and fittings common to the industry. Connections to potable water lines, installation of backflow prevention devices for nonpotable water, installation of hose bibs and installation of service lines from source of supply are permitted only when they are an integral part of the sprinkler system and outside a building. The use of pumps to draw or boost the pressure from any source of water that are used on a residential sprinkler system or for irrigation on a farm require plumber certification per chapter 18.106 RCW and/or an electrical license per chapter 19.28 RCW. (If both the electrical and plumbing trades are pursued this specialty is not allowed.)
(33) “Landscaping”—A contractor in this specialty constructs, maintains, repairs, installs and develops landscape systems and facilities for public and private gardens and other areas which are designed to aesthetically, architecturally, horticulturally, or functionally improve the ground within or surrounding a structure or tract or plot of land. Also prepares and grades plots; treats, conditions, prepares, and installs topsoil; performs hydroseed spraying; and plants all decorative vegetation. Landscaping includes installation of nonload bearing slabs, walkways and areas using concrete, brick, stone, or gravel; decorative wooden decks; garden walls, fences and screens up to six feet in height; and all other materials and equipment common to the industry. This specialty includes installation of residential lawn sprinklers (without pumps), ponds and water-features. (Excluded from this specialty are cast in place or tilt up concrete, load bearing walls for structures, perimeter fencing along property lines or boundaries.) Work in this specialty may also require an electrical license per chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW. Registration is not required for companies who only deliver material and are not installing or placing the product.
(34) “Lathing and plastering”—A contractor in this specialty coats surfaces with a mixture of sand, gypsum plaster, quick-lime or hydrated lime and water, or sand and cement and water, or a combination of such other materials that create a permanent surface coating, including coatings for the purpose of soundproofing and fireproofing. These coatings are applied with a plasterer’s trowel or sprayed over any surface which offers a mechanical means for the support of such coating, and will adhere by suction. This contractor also installs lath (including metal studs) or any other material prepared or manufactured to provide a base or bond for such coating.
(35) “Locks, security alarms and warning systems”—A contractor in this specialty sets up, installs, maintains and repairs all doors and door assemblies, gates, locks and locking devices, panic and fire rated exit devices, manual and automatic operated gate and door closures and releases, jail and prison locking devices and permanently installed or built-in safes and vaults as well as early warning systems. Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(36) “Masonry”—A contractor in this specialty installs concrete units and baked clay products; concrete, glass and clay block; natural and manufactured stone; terra cotta; and firebrick or other material for refractory work. Includes the fabrication and installation of masonry component units for structural load bearing and nonload bearing walls for structures and fences installed with or without mortar; ceramic veneer (not tile) and thin brick that resembles full brick for facing; paving; and clear waterproofing, cleaning and caulking incidental to masonry construction. This specialty also includes chimney cleaning and repair.
(37) “Manufactured/mobile home set up”—A contractor in this specialty installs, alters, repairs or prepares for moving any type of manufactured mobile home for the purpose of sitting the home which includes connections of the plumbing, gas, electrical and foundation system. Installation of electrical wires and equipment that convey electrical power to the home or to an outlet in the home, and the ground cross-over, requires an electrical license per chapter 19.28 RCW. A certified installer per chapter 46.63B RCW must be employed. (Equipment does not include plug-in household appliances.)
(38) “Metal fabrication/sheet metal”—A contractor in this specialty fabricates, installs and repairs architectural and general products made of sheet metal including but not limited to exhaust hoods, counters, etc. This includes layout, cutting, fabrication, and installation of sheet metal products, assembly and installation of premanufactured sheet metal or other industry accepted products, and bracing and reinforcing materials. (Does not include structural metal fabrication.)
(39) “Overhead/garage doors”—A contractor in this specialty installs wood, wood panel, steel panel or steel roll-up doors and the rails and support systems common to the industries. The installation of power or hand operated opening/closing motors and devices is included. Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(40) “Painting and wall covering”—A contractor in this specialty applies materials common to the painting and decorating industry for protective or decorative purposes. Includes the installation of surface coverings including paints, papers, textures, fabrics, pigments, oils, turpentines, japans, dryers, thinners, varnishes, shellacs, stains, fillers, waxes, adhesives, water, and any other vehicles, mediums, and materials which by evaporation may be mixed and applied to the surface of structures. Surface preparation, caulking, pressure washing, sandblasting, and cleaning preparatory to painting/wall covering are included. Registration is not required for commissioned artwork and commissioned mural painting.
(41) “Paving/striping/seal coating”—A contractor in this specialty installs, excavates, grades, compacts, and repairs the application of asphalt/cement to streets, driveways, parking lots, boat ramps, and landing strips and taxiways for an airport. Also includes the filling of cracks and voids in existing surfaces, the application of sealants and the installation of precast bumpers, nonelectrical traffic signs/markers and striping on the surface.
(42) “Plumbing”—A contractor in this specialty installs, alters, repairs and renovates all potable water, building supply, and distribution pipes; all plumbing fixtures and traps; all drainage and vent pipes; and all building drains and building sewers, including their respective joints and connections, devices, receptors, and appurtenances within the property lines of the premises and shall include potable water piping, potable water treating or using equipment, medical gas and medical vacuum systems, liquid and fuel gas piping, and water heaters, hydronic heating systems and vents for same. Includes solar heating equipment attached to potable water systems. Plumber certification is required for work within a building per chapter 18.106 RCW.
(43) “Pressure washing”—A contractor in this specialty uses the force of pressurized water to clean and prepare surfaces for any protective, decorative and/or functional treatment on a commercial and/or residential structure. This specialty may also provide dust control.
(44) “Roofing”—A contractor in this specialty installs and repairs materials common to the industry that form a water tight, weather resistant surface for roofs and decks, including all accessories, plywood, coping, flashing, valleys, gravel stops, and roof insulation panels above the roof decks. The work is completed using the following materials: Asphaltum, pitch, tar, felt, glass fabric, urethane foam, metal roofing systems, flax, shakes, shingles, roof tile, slate or any other roofing, waterproofing, weatherproofing or membrane material(s) or a combination thereof. Also includes roofing related architectural sheet metal. (This specialty does not allow for structural repair of trusses, beams or joists.)
(45) “Sandblasting”—A contractor in this specialty uses the force of compressed air in conjunction with abrasive materials and prepares surfaces for any protective, decorative and/or functional treatment on a commercial or residential structure.
(46) “Sanitation systems and/or side sewers”—A contractor in this specialty fabricates and installs septic tanks, storm drains, and other sewage disposal and drain systems outside the building structures. This classification includes the laying of cast-iron, steel, concrete, vitreous and nonvitreous pipe and any other hardware associated with these systems, including any related excavating, grading, trenching, surfacing and backfilling.
(47) “Scaffolding and safety railings”—A contractor in this specialty erects metal or wood scaffolding including temporary sidewalk sheltered construction work barricades, safety railings, stages and bleachers.
(48) “Service station equipment and maintenance”—A contractor in this specialty installs auto hoisting equipment, hydraulic systems, grease racks, compressors, air hoses, fuel dispensing, cathotic and other service station equipment Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(49) “Siding”—A contractor in this specialty installs all types of exterior siding including but not limited to wood, wood products, vinyl, aluminum and metal siding to new or existing buildings.
(50) “Signs”—A contractor in this specialty fabricates and installs all types of signs, including but not limited to: Post or pole supported signs, signs attached to structures, painted wall signs and modifications to existing signs. Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(51) “Steel erectors”—A contractor in this specialty fabricates and erects structural steel shapes and plates of any profile, perimeter or cross-section, which are or may be used as structural members for buildings and structures, including the rebar, riveting, welding, rigging and metal roofing and decking systems.
(52) “Structural pest control”—A contractor in this specialty constructs, repairs, and installs the ventilation screens, bird exclusion devices, and caulking of cracks and holes for exclusion of and repelling pests. Includes the replacement of bird blocking screens.
(53) “Suspended ceilings and acoustical tile”—A contractor in this specialty installs, modifies or repairs all types of suspended ceilings, including but not limited to lay-in-grid and other types of systems involving solid, perforated or translucent ceiling panels.
(54) “Swimming pools, spas and hot tubs”—A contractor in this specialty constructs, alters, and repairs permanent swimming pools and spas or hot tubs, including associated equipment. May also do repairs to damaged acrylic, fiberglass, porcelain and other like materials in standard bathtubs or showers. Work in this specialty may also require an electrical license per chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW.
(55) “Tanks and tank removal”—A contractor in this specialty installs and/or removes fuel storage, grain and other types of tanks which have been or are to be used for dispensing gasoline, diesel fuel, waste oil, kerosene, propane or other chemicals. This work involves the installation and/or removal of all incidental tank related piping. Work in this specialty may also require an electrical license per chapter 19.28 RCW.
(56) “Tile, ceramic, mosaic and natural and manufactured stone”—A contractor in this specialty prepares surfaces as necessary and installs glazed wall, ceramic, mosaic, quarry, faience, glass mosaic and stone tiles, thin tile that resembles full brick, natural or simulated stone slabs for bathtubs, showers and horizontal surfaces inside of buildings, or any tile units set in the traditional or innovative tile methods, excluding hollow or structural partition tile. Work in this specialty may also require plumber certification per chapter 18.106 RCW and/or an electrical license per chapter 19.28 RCW.
(57) “Tree removal”—A contractor in this specialty falls and/or removes trees, stumps and/or branches on residential or commercial property or near a residential or commercial structure, outbuilding or fence.
(58) “Utilities and telecommunications”—A contractor in this specialty provides excavation, cabling, horizontal boring, grading, and backfilling necessary for construction of a utility or telecommunication system prior to the line of demarcation. Also performs fabrication and/or installs pipes and piping for the conveyance or transmission of steam, gases, chemicals, and other substances.
(59) “Window coverings”—A contractor in this specialty installs window treatment rods and other handling devices and covering products, including but not limited to the following: Material and fabric that make up louvers, shutters, and blinds; residential and commercial draperies; permanent screens; expanded metal window and door guards; and plastic film and/or other treatments applied for temperature control.
(60) “Water conditioning equipment”—A contractor in this specialty installs water conditioning equipment or water treatment equipment with the use of only such pipe and fittings as are necessary to connect the water conditioning or water treatment equipment in a water supply system and only within six feet of the water service supply. Drainlines must run to existing floor drain, standpipe or outside the structure. Work in this specialty may also require plumber certification per chapter 18.106 RCW.
(61) “Welding and ornamental metal”—A contractor in this specialty installs, alters, removes, or repairs all architectural, structural and decorative steel, aluminum or other materials in welding techniques by the use of processes common to the industry.
(62) “Well drilling”—A contractor in this specialty installs and repairs water wells and pumps by boring, drilling, excavating, casing, cementing and cleaning to provide a supply of uncontaminated water. May also install water conditioning equipment and perform soil sampling. (Excludes the installation of jet and submersible pumps; electrical pump controls and wiring from pump equipment to first readily accessible disconnect; and water line to storage or pressure tank.) Work in this specialty may also require plumber certification per chapter 18.106 RCW or an electrical license per chapter 19.28 RCW. (If both the electrical and plumbing trades are pursued this specialty is not allowed.)
(63) “Wood/pellet and gas stove”—A contractor in this specialty installs wood, pellet, or gas stoves, zero clearance and fire place inserts. These systems may include the following areas of work and related equipment: Air-filtering devices; gas piping from service connection to equipment; chimney, flashing and flues; and outside combustion air ducts. The installing of piping, ducting and equipment for transmitting the heated air or water produced by the devices may also require an electrical license per chapter 19.28 RCW and/or plumber certification per chapter 18.106 RCW.
Washington State Department of Enterprise Services:
General Inquiries (360) 407-2200 CustomerRelations@des.wa.gov
Washington State DOT:
360-705-7000 / 360-705-7438
Washington State Department of Transportation
310 Maple Park Avenue SE
P.O. Box 47300