Plumbing company License Requirements in Spokane, WA

Plumbing companies in Spokane must comply with several federal requirements beyond state licensure. First, you must obtain an Employer Identification Number (EIN) from the IRS under 26 U.S.C. § 501(c), required for hiring employees and filing business taxes. If you hire employees, you must comply with federal wage and hour laws under the Fair Labor Standards Act (29 U.S.C. § 201), including minimum wage, overtime, and recordkeeping requirements.

Occupational Safety and Health Administration (OSHA) requirements under 29 U.S.C. § 651 apply to all plumbing work sites, including fall protection, electrical safety, and hazard communication standards. You must maintain an OSHA 300 log if you have 11 or more employees. Americans with Disabilities Act (ADA) compliance under 42 U.S.C. § 12101 requires accessible facilities and non-discriminatory hiring practices. Environmental Protection Agency (EPA) regulations under the Clean Water Act (33 U.S.C. § 1251) apply to proper disposal of wastewater and materials. Lead-based paint disclosure requirements under 42 U.S.C. § 4852d apply if working on pre-1978 residential buildings. Workers' compensation insurance is required by Washington state but federally mandated employee safety standards also apply. Your plumbing work may trigger compliance with state plumbing codes that reference federal standards in the International Plumbing Code (IPC).

Spokane County and the City of Spokane impose additional permitting and inspection requirements for plumbing companies operating locally. All plumbing installations in Spokane require a Plumbing Permit issued by the City of Spokane Department of Building Services before work begins. Submit permit applications with detailed plumbing plans, fixture schedules, and proof of your Master Plumber licence. The city requires plan review (typically 3-5 business days) and final inspection after installation is complete.

Spokane County plumbing permits are required for work outside city limits. The County Building and Planning Department issues these permits and conducts inspections at roughing-in and final stages. Permit costs in Spokane typically range from $100-$250 depending on project scope.

Zoning compliance is critical: residential plumbing installations require verification that the property is zoned for residential use. Commercial plumbing work requires commercial zoning and compliance with accessibility standards. The City of Spokane enforces the International Plumbing Code (IPC) with Washington amendments.

Healthcare facilities and schools require additional approvals from Spokane County Health District. If your work involves water system modifications, you may need approval from Spokane County Health District Water Quality Division. Fire protection plumbing (sprinklers) requires Spokane Fire Department approval. Backflow prevention devices must be tested and certified annually by a certified tester. Each jurisdiction (City of Spokane, Spokane County, and specialty districts) may have slightly different fee structures and inspection schedules, so contact the specific jurisdiction before beginning work.

The total first-year cost to start a plumbing company in Spokane ranges from $2,500-$4,200, including all required licences, permits, insurance, and local fees. Breaking down each cost:

State Master Plumber Licence: $350-$425 (application and examination fees). If you must complete apprenticeship hours first, apprenticeship registration costs $75-$150, and Journeyman Plumber licence costs $250-$325.

Local Spokane City Plumbing Permits: Budget $300-$500 annually. Initial permits range $100-$250 per project; sample work permits average $150-$300. County permits (if operating in unincorporated areas) add another $100-$200.

Business Licensing: Spokane business licence costs $75-$150. Washington State Department of Revenue Seller's Permit (if providing materials) costs $0-$30.

Liability Insurance: Plumbing contractors must carry General Liability Insurance ($1,000,000 minimum); annual premiums range $800-$1,500. Workers' Compensation Insurance (if hiring employees) costs $1,200-$2,500 annually. Bonding may be required by the city ($300-$600).

Continuing Education (first 3-year cycle): 30 approved hours cost $200-$400 total through approved providers.

Vehicle and Tool Requirements: Not regulated by the state, but expect $2,000-$5,000 for a service vehicle, tools, and equipment to meet code compliance.

Total reasonable first-year investment: $2,500-$4,200 for sole proprietor with no employees; $4,000-$6,500 if hiring apprentices or employees.

Washington Master Plumber licences must be renewed every 3 years from the date of issuance. Your renewal deadline appears on your current licence card. Renewal notices are mailed 30 days before expiration; however, you should not wait for the notice—set a calendar reminder to avoid missing the deadline.

To renew, submit the Master Plumber Renewal Application to the Department of Labor & Industries by the expiration date. The renewal fee is $300-$350. You must complete 30 continuing education hours during the 3-year period, with a minimum of 6 hours in plumbing code updates and 4 hours in safety or business management. Approved providers include the Washington State Plumbing Code Academy, local community colleges, and manufacturer training programs. Continuing education must be completed before renewal or your licence will not be renewed.

Renewal is processed online through the Department of Labor & Industries website (www.lni.wa.gov) or by mail. Online renewal typically takes 2-3 weeks; paper submissions may take 4-6 weeks. If you miss the renewal deadline, your licence will expire and you cannot legally perform plumbing work. Late renewal is possible within 90 days of expiration with a late fee ($50-$100 additional). Operating on an expired licence violates RCW 18.106.140 and subjects you to fines of $1,000+ and potential cease-and-desist orders. If your licence expires beyond 90 days, you must reapply as a new applicant and retake the Master Plumber examination.

Operating a plumbing company in Spokane without a valid Master Plumber licence violates Washington RCW 18.106.140 and carries significant penalties. First violations result in a civil penalty of $1,000 minimum, increasing to $2,000-$5,000 for repeat violations. The Washington Department of Labor & Industries can issue a Cease and Desist Order immediately upon discovery of unlicensed plumbing work, requiring all work to stop and be corrected by a licensed Master Plumber at your expense.

Criminal penalties apply in serious cases: unlicensed plumbing work is a Class C felony under RCW 18.106.140, carrying up to 5 years imprisonment and fines up to $10,000. Property owners who hire unlicensed plumbers are also liable for penalties and may face construction lien issues.

Violations are discovered through customer complaints to the Department of Labor & Industries, during city/county inspections when an unlicensed plumber's work is discovered, or through tip lines. Your homeowners' or commercial liability insurance is void if you operate unlicensed—no claims will be paid, exposing you to direct liability for injuries or property damage.

Build-back costs are severe: if an unlicensed plumber's work must be corrected, the licensed plumber performing corrections may charge premium rates, and Spokane building departments require reinspection of all work. Additionally, the property owner may refuse payment or file liens against you. Spokane County Health District can also impose administrative penalties if unpermitted plumbing affects water quality or public health. Your business reputation suffers irreparably—unlicensed operation typically results in loss of customers and legal action from injured parties.