Plumbing Contractor Permit Requirements in Louisville, KY

Complete permit and license guide for starting a plumbing contractor in Louisville, Jefferson County, Kentucky.

$400 -- $1200 4–10 weeks to obtain all licenses 5 requirements

Not legal advice. Requirements may change — always verify with your local government authority before applying. Last verified: .

Louisville / Jefferson County Requirements

3 requirements
1

Kentucky Division of Plumbing — Master Plumber License

Plumbing contractors in Kentucky must hold a Master Plumber License from the Kentucky Division of Plumbing. Requires 4 years of journeyman experience and passing a state exam.

$100–$200 (initial)4–8 weeks
Official government source
2

Louisville Metro Revenue Commission — Business License

Louisville (Louisville Metro / Jefferson County) requires an Occupational License for all businesses. The Revenue Commission processes license applications and collections. This license must be renewed annually and displayed at your place of business.

$50–$500/year depending on business type and gross revenues1–3 weeks
Official government source
3

Jefferson County / Louisville Plumbing Permit (per project)

A separate permit must be pulled with the local building/plumbing department for each job. Inspections are required upon job completion.

$50–$300 per project1–5 business days
Official government source

Kentucky State Requirements

1 requirement
1

Kentucky Department of Revenue — Sales and Use Tax Permit

Required for all businesses selling tangible personal property or certain services in Kentucky. Kentucky charges a flat 6% state sales tax with no local sales taxes (most transactions). Certain services including telecommunications, digital products, and some repair services are also taxable. Register online with the Kentucky Department of Revenue.

FreeImmediate (online via Kentucky One Stop Business Portal)
Official government source

Federal Requirements

1 requirement
1

EIN (Employer Identification Number)

Required if you have employees or operate as an LLC or corporation. Free from the IRS.

FreeImmediate (online application)
Official government source

Official Sources

Related Guides