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STATE FILE · IACAPITAL · DES MOINESADMITTED · 1846REVIEWED · Jul 10, 2026
Public Compliance Directory · State Hub

Iowa.

Iowa requires contractor registration through the Division of Labor for construction contractors and separately licenses plumbing and mechanical professionals through the PMSB.

County guides
3
Indexed cities
3
State code
IA
Last reviewed
Jul 10, 2026
FAST FACTS

Iowa at a glance

Quick-reference card
Licensing authorityIowa Division of Labor; Iowa Plumbing and Mechanical Systems Board
ReciprocityTrade-specific - verify state board
Workers' compensationVerify employer threshold and exemptions
Bond ruleOut-of-state contractor bond may apply; local bonds vary
Renewal cycleAnnual or trade-specific
Continuing educationTrade-specific; verify PMSB
Browse counties→Source register↓
State of
IA
· ACTIVE FILE ·
ARTICLE I · STATE AUTHORITY
LICENSING & LOCAL CONTROL
Iowa Division of Labor; Iowa Plumbing and Mechanical Systems Board
Article I · State Baseline

Licensing sets the baseline. Local offices control the job.

Local jurisdictions control building permits, inspections, zoning, and city/county registration layers.

Iowa requires contractor registration through the Division of Labor for construction contractors and separately licenses plumbing and mechanical professionals through the PMSB.

Use state contractor registration or trade license status as the baseline; use the local permit desk for project filing.

Insurance and risk

Workers' compensation, unemployment, and liability requirements should be verified by employer status and registration type.

Official source · Iowa Department of Inspections, Appeals, and Licensing — Contractor Registration ↗Reviewed · Jul 10, 2026
ARTICLE II · OPERATING FILE
WHAT TO CONFIRM
STATE · COUNTY · CITY
Article II · Operating File

Three checks before work starts.

Use the state authority as the baseline, then confirm the local process before filing.

LICENSE

State authority

Iowa requires contractor registration through the Division of Labor for construction contractors and separately licenses plumbing and mechanical professionals through the PMSB.

AgencyIowa Division of Labor; Iowa Plumbing and Mechanical Systems Board
ReciprocityTrade-specific - verify state board
RenewalAnnual or trade-specific
PERMITS

Local filing path

Local jurisdictions control building permits, inspections, zoning, and city/county registration layers.

Before workUse state contractor registration or trade license status as the baseline; use the local permit desk for project filing.
JurisdictionConfirm city or county
RISK

Insurance and bonds

Workers' compensation, unemployment, and liability requirements should be verified by employer status and registration type.

Workers' compVerify employer threshold and exemptions
BondOut-of-state contractor bond may apply; local bonds vary
EducationTrade-specific; verify PMSB
ARTICLE III · INDEXED COUNTIES
COUNTIES IN IOWA
3 GUIDES
Article III · Browse by County

3 compliance guides in Iowa.

Choose a county to find indexed cities, permit offices, and trade-specific requirements.

Black Hawk CountyOn file
1 files
Linn CountyOn file
1 files
Polk CountyOn file
1 files
Showing 3 counties →
ARTICLE IV · SOURCES
OFFICIAL SOURCE REGISTER
3 PRIMARY AUTHORITIES
Article IV · Sources & Citations

Primary authorities, not secondary summaries.

These official sources were reviewed together on Jul 10, 2026. Confirm with the authority before filing.

Licensing

Iowa Department of Inspections, Appeals, and Licensing — Contractor Registration

Licensing, renewal, board rules, and professional-scope requirements.

dial.iowa.govOpen official source ↗
REVIEWED
Jul 10, 2026
Workers' compensation

Iowa Division of Workers' Compensation

Employer coverage, thresholds, exemptions, and claims administration.

dial.iowa.govOpen official source ↗
REVIEWED
Jul 10, 2026
Article V · Neighboring States

Working across state lines?

Open the neighboring state file to confirm licensing, reciprocity, and local registration.

IL
Illinois
Open file
MI
Minnesota
Open file
MI
Missouri
Open file
NE
Nebraska
Open file
SO
South Dakota
Open file
WI
Wisconsin
Open file

Open the file. Choose the county.

Iowa compliance guides are public. Start with the county where the work will happen.

Browse counties→Back to top↑