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Plumbing company License Requirements in Chicago, IL

Last reviewed: June 2026

Quick Answer

Illinois requires plumbing companies to employ at least one Master Plumber or Journeyman Plumber licensed by the Department of Financial and Professional Regulation (DFPR). Chicago additionally mandates a city business license and plumbing permits from the Department of Buildings. Both state and local licenses must be current before conducting any plumbing work.

Key Facts

  • Illinois requires Master Plumber or Journeyman Plumber licenses issued by the Department of Financial and Professional Regulation.
  • Chicago plumbing companies need city business licenses and plumbing permits from the Department of Buildings.
  • Master Plumber applicants must pass exams and have 5+ years documented plumbing experience.
  • Annual DFPR license renewal required with continuing education credits.
  • Operating without proper licenses results in fines up to $500 per day and cease-and-desist orders.

State Licence Requirements

Licence name

Master Plumber License or Journeyman Plumber License

Issued by

Illinois Department of Financial and Professional Regulation (DFPR), Division of Professional Regulation

Cost

$200-$450

Processing time

4-8 weeks from submission to exam eligibility; 2-3 weeks post-exam for license issuance

How to apply

To obtain a Master Plumber or Journeyman Plumber license in Illinois, you must apply through the DFPR online licensing portal at www.idfpr.com. First, verify your work experience documentation: Master Plumber requires 5+ years of documented plumbing experience including 1+ year as a Journeyman; Journeyman requires 4+ years of plumbing experience or 2+ years post-apprenticeship.

Prepare required documents including proof of experience (employer letters, tax returns, apprenticeship certificates), government-issued ID, and proof of residency or business location in Illinois. Submit your application online through the eLicensing system at www.idfpr.com. The application fee is approximately $200-$250.

You must pass the Illinois Plumber Examination administered by a third-party testing vendor. The exam tests knowledge of the Illinois Plumbing Code, building codes, safety practices, and plumbing theory. Exam registration costs approximately $150-$200 and must be completed separately after application approval. Schedule your exam after your application is deemed complete.

Processing typically takes 4-6 weeks for initial review. After passing the exam and background check clearance, the license is issued. Your license must display your name, license number, and expiration date. Under 225 ILCS 320/320.070, you cannot legally perform plumbing work without an active license.

Federal Requirements

Federal requirements for plumbing companies primarily involve IRS compliance and worker protections. You must obtain an Employer Identification Number (EIN) from the Internal Revenue Service under 26 U.S.C. § 501, even if you operate as a sole proprietor. This is essential for hiring employees and maintaining business tax accounts.

Occupational Safety and Health Administration (OSHA) regulations under 29 U.S.C. § 651 apply to all plumbing operations. You must comply with OSHA standards for workplace safety, including fall protection, electrical hazard prevention, and confined space entry protocols. Plumbing work frequently involves these hazards, particularly in commercial and large residential projects.

The Americans with Disabilities Act (ADA) under 42 U.S.C. § 12101 applies to your business operations and any public-facing work. Your plumbing installations in commercial buildings must meet ADA accessibility requirements. If you employ more than 15 workers, ADA Title I employment provisions apply.

Environmental Protection Agency (EPA) regulations under 40 U.S.C. § 7401 et seq. apply to lead-containing materials. If your plumbing work involves disturbing lead paint or materials built before 1978, you must follow EPA Renovation, Repair and Painting (RRP) Rule requirements. Lead disclosure requirements apply to residential plumbing work in older homes.

Florida plumbing contractors working with wells, septic systems, or stormwater must comply with the Clean Water Act (33 U.S.C. § 1251 et seq.) and state Department of Environmental Protection regulations. The plumbing industry is generally not FDA or FCC regulated unless you manufacture or distribute plumbing fixtures.

Local & County Requirements

Chicago plumbing companies must obtain a City of Chicago Business License issued by the Department of Finance. This costs approximately $75-$150 annually and is processed through the online system at https://www.chicago.gov. You must provide proof of DFPR plumbing license, employer identification information, and business address.

The Chicago Department of Buildings requires separate plumbing permits for each job. Permit costs vary by project scope: residential repairs typically $50-$200, new construction or major installations $200-$600+. Permits are obtained through the Chicago Building Permit System at https://webapps.chicago.gov/ManualOnlineEH/. You must submit plans for any work exceeding routine maintenance, and a licensed plumber must sign off on permits.

Chicago enforces the Chicago Plumbing Code (Title 2, Chapter 2-4 of the Chicago Municipal Code), which is stricter than the Illinois State Plumbing Code in some areas. All plumbing work must comply with Chicago's requirements regarding venting, drainage, water supply, and fixture installation. The Department of Buildings conducts inspections at rough-in stage and final inspection. Inspection fees are included in permit costs.

Zoning compliance is required: verify your business location allows plumbing operations through the Department of Planning and Development. Some residential areas restrict commercial plumbing contractor offices. If you maintain a physical office/warehouse, additional Use and Occupancy permits may be required through the Department of Buildings.

In other Illinois cities outside Chicago (Evanston, Oak Park, Springfield, Peoria), requirements differ. Each municipality has separate business license requirements ($50-$300 annually) and plumbing permit processes. Contact each city's building department for specific fees and procedures. Some cities require additional liability insurance verification ($1-2 million minimum coverage) before permitting.

Total Cost Breakdown

First-year costs for starting a plumbing company in Chicago include multiple mandatory state and local licenses. The Illinois Master Plumber or Journeyman Plumber license application fee is $200-$250, with an additional exam registration fee of $150-$200, totaling $350-$450 for state licensure. Some applicants require exam retakes, adding $150-$200 per attempt.

Chicago city licensing costs $75-$150 for the initial business license. You should budget $200-$400 for your first plumbing permits, as most companies perform 2-4 jobs in month one to establish operations. Permit costs are per-job, not annual, so ongoing costs depend on volume.

Continuing education costs for initial renewal approximately $100-$200 for the required 16 hours of DFPR-approved courses, though some are free through trade associations. Insurance is a critical expense: general liability insurance costs $600-$1,200 annually for a new plumbing company; workers' compensation insurance (if hiring employees) costs $1,800-$3,500 annually depending on payroll and claims history. Bonding is not state-mandated but many customers require it ($300-$500 annually).

Vehicle and tools are not licensing costs but represent substantial startup investment: a service vehicle costs $25,000-$45,000; basic plumbing tools cost $3,000-$8,000; and a small workshop/office space costs $500-$1,200 monthly. Realistic total first-year costs for a solo plumber operating from home with one vehicle: $3,500-$6,000 including all licenses, insurance, and continuing education. A plumbing company with employees and a physical office: $8,000-$15,000+ in first-year regulatory and insurance costs alone.

Licence Renewal

Illinois Master and Journeyman Plumber licenses expire every two years on your designated renewal date (typically your birthday or anniversary date of initial issuance). You receive renewal notices from DFPR 60 days before expiration via email and USPS to your registered address.

Renewal is completed online through the eLicensing portal at www.idfpr.com. The renewal fee is $200-$250 for a two-year period. You must complete continuing education requirements: typically 16 hours of DFPR-approved plumbing-related education per two-year renewal cycle. Approved courses cover topics like Illinois Plumbing Code updates, safety practices, lead abatement, and water conservation.

Approved continuing education providers are listed on the DFPR website. Online, in-person, and hybrid formats are available through community colleges, trade schools, and plumbing associations. Submit proof of completed education with your renewal application. CE certificates must be attached or uploaded to your application.

If you miss the renewal deadline, your license lapses and you cannot legally perform plumbing work. You have a 60-day grace period to renew without penalty, but work performed during lapse is considered unlicensed practice. After 60 days, you must reapply as a new applicant, retake the exam, and pay the full application fee. Late renewal penalties range from $50-$200 depending on how overdue the license is.

Chicago business licenses renew annually (not biennial) on your business anniversary date. Renewal is $75-$150 and completed through Chicago's business licensing portal. Both state and city licenses must be current simultaneously to legally operate.

Penalties for Operating Without a Licence

Operating a plumbing company without proper Illinois DFPR licensure is a serious violation under 225 ILCS 320/14. Any person performing plumbing work without an active Master or Journeyman Plumber license commits a Class A misdemeanor, which carries criminal penalties of up to 12 months imprisonment and fines up to $2,500 per violation.

Additional civil penalties under 225 ILCS 320/14-101 include administrative fines of $500-$2,000 per day of unlicensed operation. DFPR can issue cease-and-desist orders immediately upon discovery of unlicensed plumbing work. These orders prohibit all plumbing operations until proper licensing is obtained. Violation of a cease-and-desist order results in additional penalties and potential criminal referral.

Chicago's Department of Buildings can issue violations for work performed without required city plumbing permits. Permit violations are classified as code violations carrying fines of $200-$1,000 per violation. The city can order work stoppage, removal of non-permitted plumbing, and restoration to previous condition at the violator's expense. Repeat violations in a 12-month period result in doubled penalties.

Unlicensed plumbing operations expose customers to significant liability. Illinois courts have ruled that unlicensed contractors cannot enforce payment contracts and may be liable for damages exceeding the cost of work. Your company's insurance will likely deny claims arising from unlicensed work, exposing you to personal liability for injuries or property damage.

Violation discovery occurs through customer complaints, Department of Buildings inspections, permit audits, and permit application review. DFPR conducts random investigations and responds to complaints through their complaint hotline. Second violations within five years result in license suspension or revocation. The DFPR maintains a public disciplinary database at www.idfpr.com showing violations and enforcement actions.

Find Illinois-licensed plumbing contractors and service providers through the DFPR verification system at www.idfpr.com.

Get notified when licensing rules change

Licensing requirements and fees change periodically. We'll email you when this page is updated.

Frequently Asked Questions

How long does it take to get a plumbing license in Illinois?

The complete timeline from application to active license typically takes 8-12 weeks for most applicants. Initial application review by DFPR takes 2-3 weeks; you then schedule and take the state exam (1-4 weeks depending on testing center availability). After passing the exam and completing background checks (1-2 weeks), your license is issued and mailed within 5-7 business days. If you fail the exam, you must wait 30 days to retake it, extending the timeline. Some applicants with incomplete experience documentation face additional delays while DFPR verifies prior work history. To start working faster, ensure all experience documentation is complete before submitting your application, including employer letters with specific dates and job descriptions.

Can I operate my plumbing company from home in Chicago, or do I need a commercial office?

You can operate a plumbing company from your home in Chicago as a sole proprietor if your home is zoned residential, but you cannot have a customer-facing office or storefront in a residential area. Your residential address can be your business mailing address and where you store tools/equipment in a garage or shed. However, you cannot have customers visiting your home office or conduct retail business from your residence. Chicago's zoning code (Title 17) restricts commercial business operations in residential zones. You must maintain your DFPR license and Chicago business license using your home address, which is legally permissible. If you hire employees, you need a separate commercial space for payroll and administrative functions, as home-based offices with employees violate residential zoning. For a professional operation, most plumbing companies rent small commercial warehouse or office space ($500-$1,200 monthly) to maintain a business location separate from residence.

If I hold a plumbing license from another state, can I work in Illinois or Chicago immediately?

Illinois does not have reciprocity agreements with other states, meaning your out-of-state plumbing license does not transfer to Illinois. You must obtain an Illinois Master or Journeyman Plumber license through the standard DFPR application and examination process. However, your out-of-state experience counts toward Illinois experience requirements: if you held an active plumbing license in another state, that time counts as documented plumbing experience for qualifying toward an Illinois license. You still must pass the Illinois Plumber Examination covering the Illinois Plumbing Code and Illinois-specific regulations. DFPR may reduce experience requirements slightly for applicants with equivalent out-of-state licenses (for example, reducing required years from 5 to 4 years), but this is determined case-by-case during application review. Submit copies of your out-of-state license, continuing education records, and letters from employers documenting your experience in that state. Processing takes 4-8 weeks from submission to exam eligibility, with exam scheduling adding 2-4 weeks.

What happens if I start plumbing work before getting my license, or if my license lapses?

Operating without an active Illinois DFPR plumbing license is a Class A misdemeanor crime with serious consequences. Each day you work without a license is a separate violation, resulting in potential criminal charges carrying up to 12 months jail time and $2,500 in fines per day. Chicago's Department of Buildings will issue code violations ($200-$1,000 per violation) for unpermitted work, and work performed by unlicensed individuals is not covered by most insurance policies. If a customer is injured or property is damaged, your company is personally liable with no insurance protection. Beyond criminal penalties, customers cannot be required to pay for work performed without proper licensing, meaning you lose that revenue. Your contractor's license can never be issued if you have criminal convictions for unlicensed plumbing work. If your license lapses due to non-renewal, you have exactly 60 days to renew during a grace period; after 60 days, you cannot legally work. If your license lapses and you continue working, same criminal penalties apply. Avoid this by setting calendar reminders 90 days before expiration and completing renewal immediately.

Do I need a license for every plumber working for my company, or just the company owner?

Every plumber performing actual plumbing work must hold an active Illinois Master or Journeyman Plumber license. Your company must have at least one Master Plumber on staff (ownership or employee), but all plumbers doing hands-on work must be individually licensed. You cannot hire an unlicensed person to perform plumbing work under any circumstances—this violates 225 ILCS 320 and exposes your company to criminal liability. Your Master Plumber (owner or principal employee) is responsible for all plumbing work performed under your company license and must supervise work quality and code compliance. Apprentices who are actively enrolled in an Illinois-approved apprenticeship program can perform supervised plumbing work without a license, but they must work under direct supervision of a licensed plumber and their apprenticeship must be registered with the Illinois Department of Labor. Document all employee licenses and verify they are current before assigning work. Maintain copies in your office and cross-reference with DFPR's online database. If you discover an employee's license has expired, immediately remove them from work assignments until they renew.

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Sources & References

  • Illinois Plumbing License Act, 225 ILCS 320Establishes Master and Journeyman Plumber license categories and requirements
  • Illinois Administrative Code, Title 50, Part 4330DFPR rules governing plumbing license applications, exams, and renewals
  • Chicago Municipal Code Title 4, Chapter 4-20Chicago business licenses and basic city operating requirements
  • Chicago Municipal Code Title 2, Chapter 2-4-020Chicago Department of Buildings plumbing permit and inspection requirements
  • 225 ILCS 320/14Penalties for practicing plumbing without proper Illinois state license

Licence requirements change. Verify current requirements with the issuing agency before applying.

Editorial standards: This guide is reviewed against primary government sources and cites 5 statutes. Last reviewed June 2026. Scheduled for re-verification by June 2027.

See our editorial policy for how content is created and verified, or report an inaccuracy.