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Plumbers Insurance Requirements

What property managers need to verify before hiring

Risk Level: high
Typical GL: $1,000,000/$2,000,000

Plumbing contractors are essential to property management operations, handling routine maintenance like leak repairs and fixture replacements as well as major projects like riser replacements and sewer line rehabilitation. Water damage is consistently one of the top property insurance claims, making proper COI verification for plumbers especially important. A single burst pipe or failed connection can cause tens of thousands of dollars in damage to multiple units or floors. Property managers should require plumbers to carry a minimum of $1M/$2M in general liability with completed operations coverage. Plumbing failures often manifest days or weeks after work is completed — a slow leak behind a wall can cause mold growth and structural damage long before it is detected. Completed operations coverage ensures the plumber's policy responds to these delayed claims. Verify that the plumber holds appropriate state and local licenses, particularly for gas piping work which requires separate certification in most jurisdictions. Gas line work adds explosion and carbon monoxide risk, which significantly increases the liability exposure. For plumbers performing gas work, consider requiring higher GL limits of $2M/$4M.

Recommended Insurance for Plumbers

Coverage TypeRecommended Minimum
Commercial General Liability
$1,000,000 / $2,000,000
Workers' Compensation
Statutory limits
Commercial Auto
$1,000,000 combined single limit
Pollution Liability
$500,000
Umbrella / Excess Liability
$1,000,000

Common Risks

Water damage from burst pipes, failed connections, or improper soldering
Mold growth caused by undetected slow leaks behind walls or under floors
Gas leaks leading to explosion or carbon monoxide poisoning
Sewer backup causing contamination and health hazards
Property damage from cutting into structural elements to access pipes
Scalding injuries from improperly installed water heaters or mixing valves

Workers Compensation

NCCI class code 5183 covers most commercial and residential plumbing work. Rates typically range from $3.00 to $7.00 per $100 of payroll. Sewer and underground work may be classified separately under 6306 with higher rates.

NCCI CodeDescription
5183Plumbing — Installation, Service, and Repair NOC
5185Automatic Sprinkler Installation
6306Sewer Construction — All Operations

Additional Insured Requirements

Require additional insured status on the plumber's GL policy for the property owner and management company. Request CG 20 10 and CG 20 37 endorsements. Waiver of subrogation is critical for plumbing work due to the high frequency of water damage claims that may also trigger the property owner's policy.

Plumbers Requirements by State

Insurance requirements vary by state. Select a state to see specific minimums, licensing requirements, and compliance notes for plumbers in that state.

AL - AlabamaAK - AlaskaAZ - ArizonaAR - ArkansasCA - CaliforniaCO - ColoradoCT - ConnecticutDE - DelawareFL - FloridaGA - GeorgiaHI - HawaiiID - IdahoIL - IllinoisIN - IndianaIA - IowaKS - KansasKY - KentuckyLA - LouisianaME - MaineMD - MarylandMA - MassachusettsMI - MichiganMN - MinnesotaMS - MississippiMO - MissouriMT - MontanaNE - NebraskaNV - NevadaNH - New HampshireNJ - New JerseyNM - New MexicoNY - New YorkNC - North CarolinaND - North DakotaOH - OhioOK - OklahomaOR - OregonPA - PennsylvaniaRI - Rhode IslandSC - South CarolinaSD - South DakotaTN - TennesseeTX - TexasUT - UtahVT - VermontVA - VirginiaWA - WashingtonWV - West VirginiaWI - WisconsinWY - Wyoming

Related Trades

HvacFire ProtectionWaterproofingGeneral Contractors

Frequently Asked Questions

Why is completed operations coverage especially important for plumbing work?▼
Plumbing failures often do not become apparent until days, weeks, or even months after the work is completed. A slow leak from an improperly soldered joint can cause extensive mold growth and structural damage behind walls before it is detected. Completed operations coverage ensures the plumber's GL policy will respond to claims arising from their work after the project is finished.
Should I require higher GL limits for plumbers doing gas line work?▼
Yes. Gas line work introduces explosion and carbon monoxide risks that significantly increase liability exposure. Most property managers require $2M per occurrence and $4M aggregate for plumbers performing gas piping installation or repair. Verify that the plumber holds a separate gas fitting license or certification as required by your jurisdiction.
What is pollution liability and do I need it from my plumber?▼
Pollution liability covers claims arising from the release of contaminants, which is relevant for plumbers who work on sewer lines, septic systems, or waste piping. A sewer backup can introduce raw sewage into occupied spaces, creating a health hazard and costly cleanup. If your plumber performs any sewer or drain work, requiring $500K in pollution liability is a prudent risk management measure.
How do I handle a plumbing contractor who says they are a sole proprietor with no employees?▼
Even sole proprietors should carry general liability insurance. While workers' compensation requirements vary by state for sole proprietors, many jurisdictions treat uninsured subcontractors as employees of the hiring entity. This means if an uninsured plumber is injured on your property, your workers' compensation policy may be responsible. Require all plumbing contractors to carry WC regardless of employee count, or obtain a state-issued exemption certificate.
What should I look for on a plumber's COI before approving work?▼
Verify that the GL policy is current, includes completed operations coverage, and meets your minimum limits ($1M/$2M minimum). Confirm the property owner is listed as additional insured. Check that workers' compensation is active with statutory limits. For gas work, verify the higher $2M/$4M GL limits and ensure the plumber's license covers gas fitting.

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