Washington Radon Gas Testing & Sub-Slab Depressurization Contractor
Comprehensive regulatory guidelines, surety bond pricing, and required liability coverage established by the Washington State Department of Labor & Industries (L&I). Verify statutory rules, satisfy commercial property owners, and access digital ACORD certificates in under 5 minutes.
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*Estimates based on standard market rates for commercial artisan contractors. Exact quotes require underwriting review of prior loss history, specific endorsements, and payroll declarations.
Radon Gas Testing & Sub-Slab Depressurization Contractor Scope of Work & Legal Permitting Authority
Radon contractors drill suction pits into concrete foundation slabs, install PVC vent piping, and mount exterior inline fans venting radioactive gas.
Defined Authorized Scope of Construction:
Active sub-slab depressurization (ASD), crawlspace vapor barrier sealing, manometer pressure verification, and post-mitigation radon testing.
Mandatory Experience Prerequisites
NRPP or NRSB Radon Mitigation Specialist certification, continuous radon monitoring, and sub-slab suction pit core drilling
Required Insurance Policy Endorsements
Radioactive Gas Testing / Failure to Mitigate E&O Liability, Completed Operations
How to Obtain a Radon Gas Testing & Sub-Slab Depressurization Contractor License in Washington
Official 4-step compliance path pursuant to Revised Code of Washington RCW 18.27 & WAC Chapter 296-200A.
Legal Entity & EIN Formation
Washington Business Entity Filing StatutesForm your business entity (LLC, Corporation, or Sole Proprietorship) with the Washington Secretary of State and secure your Federal Employer Identification Number (FEIN). Ensure your registered business name precisely matches all state and municipal filings.
Designate Qualifying Individual (QI)
Washington State Department of Labor & Industries (L&I) Experience Verification RulesAppoint a Qualifying Party, Primary Qualifying Agent, or Responsible Managing Employee (RME). The QI must verify NRPP or NRSB Radon Mitigation Specialist certification, continuous radon monitoring, and sub-slab suction pit core drilling and satisfy experience criteria governed under Revised Code of Washington RCW 18.27 & WAC Chapter 296-200A.
Execute Statutory Bond & Insurance
Revised Code of Washington RCW 18.27 & WAC Chapter 296-200A Financial Responsibility MandatesSecure the mandatory $30,000 General / $15,000 Specialty contractor license bond executed by an admitted surety. File an official Certificate of Insurance (COI) maintaining at least $1,000,000 Each Occurrence / $2,000,000 General Aggregate Commercial General Liability, naming Washington State Department of Labor & Industries (L&I) as certificate holder.
Examination & Board License Issuance
L&I Registration Candidate Information Bulletin (CIB)Complete the Washington Business & Law examination along with the specific Radon Mitigation technical trade examination administered by L&I Registration. Submit application fees ($124.70) to receive official licensure and permit pull authorization.
Ready to file with the Washington State Department of Labor & Industries (L&I)?
Make sure your statutory $30,000 General Contractor Bond / $15,000 Specialty Bond (and for LLC entities, your General Liability Certificate listing the state licensing board as certificate holder) are electronically active prior to submitting application fees.
Washington Radon Mitigation Compliance & Insurance FAQs
Direct answers on state licensing prerequisites, insurance thresholds, and surety bond regulations.
Is a state contractor license legally mandated for Radon Mitigation contractors in Washington?
Yes, executing commercial or residential radon mitigation contractor projects in Washington legally requires an active state contractor license issued by the Washington State Department of Labor & Industries (L&I) under Revised Code of Washington RCW 18.27 & WAC Chapter 296-200A. Performing contracting services without official board credentials triggers immediate stop-work orders, statutory fines, and civil citations.
What technical codes govern radon mitigation contractor operations in Washington?
Radon Gas Testing & Sub-Slab Depressurization Contractor installations in Washington must strictly adhere to the EPA Renovation, Repair & Painting (RRP) Rule & OSHA 1910.1200 HazCom Standards. In addition, all completed work and materials must satisfy NESHAP 10-day advance state abatement notification and NIOSH 7400 phase-contrast air clearance monitoring to pass municipal building inspection.
What are the commercial general liability insurance minimums for Radon Mitigation contractors in Washington?
Radon Mitigation contractors in Washington typically must maintain a minimum of $1,000,000 Each Occurrence / $2,000,000 General Aggregate in commercial general liability insurance. Under Washington statutory rules and General Contractor (GC) bid standards, policies must cover bodily injury, property damage, and completed operations to secure jobsite clearance.
How much does the required Washington Radon Mitigation surety bond cost?
A Washington radon mitigation contractor license bond costs between $420 and $630 per year for contractors with standard credit, satisfying the statutory $30,000 General / $15,000 Specialty bond requirement. High-risk credit profiles range from $756 to $1050 annually. Premium rates are calculated as a percentage of the total bond penal sum.
Is workers' compensation insurance required for Radon Mitigation contractors in Washington?
Yes, workers' compensation insurance is mandatory for employers in Washington under Wash. Rev. Code § 51.04.060 & § 51.12.010. Because Washington operates an exclusive monopolistic state fund, coverage must be obtained directly through the Washington Dept. of Labor & Industries (L&I); private commercial insurance policies cannot satisfy statutory compliance. Sole proprietors with 0 employees: Sole proprietors with 0 employees exempt under RCW 51.12.020(5); can elect voluntary coverage with L&I under Form F242-012-000.
Does Washington offer contractor license reciprocity for Radon Mitigation contractors?
Yes, Washington maintains formal reciprocal licensing agreements with OR, ID for qualified radon mitigation contractor applicants. Out-of-state contractors in good standing under equivalent statutory frameworks can apply to waive trade exams, though state law and business rules testing may still apply.
Official Statutory Citations & Legal Authorities
Audited by Pasi Tapio Hakamaki • Managing Editor
This compliance benchmark for Washington Radon Gas Testing & Sub-Slab Depressurization Contractors is audited against primary state legislative statutes (Revised Code of Washington RCW 18.27 & WAC Chapter 296-200A) and administrative rules published by the Washington State Department of Labor & Industries (L&I). TradeCertify maintains strict editorial independence. If you represent a regulatory body or note an erratum in statutory bond limits, please contact our research desk.
Compare Radon Mitigation Rules in Reciprocal & Regional States
Review statutory licensing, bond costs, and reciprocity waiver rules for this classification across neighboring jurisdictions.
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