What permits do you need to open a contractor or trade in Louisville Jefferson County?

There is no single figure, and any site quoting one is rounding away the part that matters. Of the 12 records listed for a contractor or trade in Louisville Jefferson County, KY, 5 apply to every business of this type and 7 are conditional. Adding every fee on the page together would overstate what most operators pay, because it would include permits they never need.

Of the 5 that always apply, 1 carry a flat fee, coming to $400.00. That is a floor, not a total. 5 of the 12 are charged as a range or a formula set by the issuing agency, and 1 has no fee published at all. The ones that vary:

Zoning Confirmation / Zoning Certification Letter: $50–$200 a basic Zoning Confirmation, Home Occupation review, or Temporary Activity Permit (TAP) review is $50; a full Zoning Certification Letter (used for certificates of land use restriction and similar formal determinations) is $200

Occupational License Tax Registration: 1.25% (Metro Government) + 0.20% (Transit Authority of River City) + 0.75% (Jefferson County/Anchorage school boards) = 2.20% total, applied to both (a) wages and compensation paid to employees for work performed in Louisville Metro and (b) the net profit of a business entity or resident individual conducting business there. A non-resident individual (a non-resident sole proprietor or employee) pays only the Metro and TARC components — 1.45% — because non-resident individuals are exempt from the school board component by statute. There is no minimum tax, and applying for the account number itself carries no separate fee.

Commercial Building Permit: Calculated per square foot by Kentucky Building Code occupancy type: Assembly and High Hazard $0.16/sq ft; Business, Institutional, Mercantile, and Residential (other than 1-2 family) $0.15/sq ft; Educational and Factory $0.14/sq ft (Storage is also $0.14/sq ft); Utility/Miscellaneous $0.13/sq ft; Residential 1-2 Family $0.105/sq ft. Square footage is measured on every floor to the outside of the exterior walls. A plan review fee (for review without an issued permit) is the greater of $30 or one-third of the calculated permit fee. No building permit fee is ever less than $75. A foundation-only permit is $75 (single-family) or $125 (all other uses). Work whose cost cannot be calculated by square footage is billed at $50 plus $2.50 per $1,000 of the applicant's estimated cost.

Contractor Identification License: By trade, per year: Building Type A (multiple building permits; requires 6 hours of continuing education annually for 1-2 family/multi-family work) $125, cycle Jan 1-Dec 31. Building Type B (a single building permit only, one per applicant per year) $50, Jan 1-Dec 31. HVAC (requires a Kentucky Master HVAC Contractor license) $200, Mar 1-Feb 28. Manufactured Fireplace, Range Hood, and Mechanical Refrigeration $75 each, Mar 1-Feb 28. Fire Detection and Fire Suppression (requires a Kentucky Suppression Contractors license) $75 each, May 1-Apr 30. Moving $75, May 1-Apr 30. Sign installation/repair contractor $125, May 1-Apr 30. Wrecking Type A $125 and Wrecking Type B $225, both May 1-Apr 30.

Local Occupational Licence Tax: A percentage of payroll and net profits set by each city or county, capped at 1.25% for a county over 300,000 people — not a flat fee

Permits for a contractor or trade in Louisville Jefferson County, KY come from 6 separate offices: Louisville Metro Office of Planning, Louisville/Jefferson County Metro Revenue Commission, Louisville Metro Department of Codes & Regulations, Office of Construction Review, Kentucky Secretary of State, Business Filings Division, Kentucky Department of Housing, Buildings and Construction, Kentucky Department of Revenue, Division of Registration. No single office issues them all, which is why an opening means filing in several places rather than one.

• Louisville Metro Office of PlanningIssues 1 permit on this page: Zoning Confirmation / Zoning Certification Letter444 S. 5th Street, Suite 300, Louisville, KY 40202 · (502) 574-6230louisvilleky.gov/government/office-planning
• Louisville/Jefferson County Metro Revenue CommissionIssues 1 permit on this page: Occupational License Tax Registration617 W. Jefferson Street, Louisville, KY 40202 · (502) 574-4860louisvilleky.gov/government/revenue-commission
• Louisville Metro Department of Codes & Regulations, Office of Construction ReviewIssues 2 permits on this page: Commercial Building Permit, Contractor Identification License444 S. 5th Street, Louisville, KY 40202 · (502) 574-3321louisvilleky.gov/government/construction-review
• Kentucky Secretary of State, Business Filings DivisionIssues 3 permits on this page: Articles of Organization (LLC), Articles of Incorporation, Annual Report700 Capital Avenue, PO Box 718, Frankfort, KY 40602 · (502) 564-3490www.sos.ky.gov/bus/business-filings/Pages/Fees.aspx
• Kentucky Department of Housing, Buildings and ConstructionIssues 4 permits on this page: HVAC Contractor Licence, Plumbing Contractor Licence, General Contractor Licence (not required by Kentucky), Electrical Contractor Licence500 Mero Street, First Floor, Frankfort, KY 40601 · (502) 573-2002dhbc.ky.gov
• Kentucky Department of Revenue, Division of RegistrationIssues 1 permit on this page: Local Occupational Licence Tax501 High Street, Station 20, Frankfort, KY 40601 · (502) 564-3306revenue.ky.gov/Business/Pages/Register-Business.aspx

Whether this is a mandatory prerequisite for every business type or an optional due-diligence document was not stated on the fee schedule itself; several other requirements in this file (the Conditional Use Permit for child care, for example) separately depend on a zoning determination.

This is Kentucky's local occupational tax, not a flat business licence fee — it is levied on nearly every business, trade, profession, or activity for profit conducted in Louisville Metro (all of Jefferson County), regardless of the entity's legal residence. A $25 minimum PENALTY applies only for failing to file a return by the due date, regardless of whether tax is owed — that is not a registration fee and is not what is recorded above.

Electrical, HVAC/mechanical, and fire suppression/detection work are permitted and fee'd separately under the same chapter — see the standalone Fire Suppression/Detection Permit record for that portion.

Genuinely separate from and additional to any Commonwealth of Kentucky trade licence. Every type requires an occupational licence number already on file with the Revenue Commission, proof of unemployment-insurance compliance, workers' compensation coverage (or an affidavit of no employees), and commercial general liability insurance of at least $250,000 — wrecking contractors need $300,000 (Type A) or $1,000,000 (Type B), with Louisville Metro Government named as additional insured.

Forty dollars flat, fixed directly in statute, and among the cheapest formation fees in the country. A non-profit LLC pays the same $40; a foreign LLC seeking authority to transact business pays $90.

A master HVAC contractor pays $250 a year and a journeyman mechanic $50, and both renew on a personal rather than a shared calendar — the licence expires on the last day of the individual's own birth month, so no two licensees necessarily renew at the same time. Restoring an expired master licence costs $125, a journeyman's $25; going inactive and later reactivating each costs $20; a fully terminated licence can be reinstated within limits at $250 per twelve-month period lapsed, capped at $750. A master HVAC contractor must also carry insurance under the governing statute.

A master plumber sits a $150 examination and then pays $250 a year to hold and renew the licence; a journeyman's examination is $50 and the licence itself $60 a year. As with HVAC, the renewal date tracks the individual's birth month rather than a fixed calendar date. Examinations run four times a year, in February, May, August and November, and a passing score stays valid for three years if the licence itself is not taken up immediately. Master plumbers must carry insurance under the governing statute.

Kentucky has no state business licence — its own portal says so outright — but this tax is what actually reaches nearly every business, and calling it a licence understates how it works. It is not a flat fee: it taxes the wages earned and services performed within a jurisdiction and the net profits apportioned to it, at a rate each city or county sets for itself, up to a statutory ceiling of 1.25% in a county of 300,000 or more. A 2025 legislative briefing put the scale in perspective: a hundred and seventy cities and eighty-seven counties tax gross earnings, eighty-nine cities and seventy counties tax net profits, and thirty-nine cities tax gross receipts, together supplying sixty per cent of city tax revenue and nearly forty-six per cent of county tax revenue — the largest local revenue source in the state. A business with a presence in several jurisdictions registers and files in each of them, using standardised forms the law requires every district to publish online, with a credit against the county tax where a city inside it also taxes the same activity.

Quoted alone, the Secretary of State's fee is $40 — the same as an LLC — and the $50 figure that circulates is really that $40 plus the $10 minimum organization tax under a separate statute, banded by the number of authorised shares: a cent a share up to twenty thousand shares, half a cent for the next hundred and eighty thousand, two-tenths of a cent above that, with $10 as the floor for a filing of a thousand shares or fewer. A non-profit corporation is cheaper still, at $8, because the organization tax does not apply to it.

Fifteen dollars, the same figure whatever the entity type, with a six-month window to file rather than a single deadline day. The consequence of missing it is not a late fee but administrative dissolution for a domestic entity, or revocation of the certificate of authority for a foreign one — either way the business falls out of good standing. Reinstatement costs a flat $100 penalty on top of every delinquent year's $15, plus letters of good standing from the revenue department and, for a profit company, the unemployment insurance division.

No fee, because Kentucky licenses no general contractor — the construction department's own chapter index covers elevators, home inspectors, boilers, manufactured homes, fire protection and three specific trades, and has no general contracting chapter among them. What the state licenses instead is a narrow set of trades: heating and air conditioning, plumbing and electrical, each through its own regulation with its own fee and renewal cycle. A general contractor still answers to local building permits and to the occupational licence tax wherever they work.

Three tiers, each priced at double the one below it and each running two years rather than one: an electrical contractor licence is $400, a master electrician $200, and an electrician $100, all renewing on or before the last day of the licensee's birth month in the second year of the cycle — except a contractor licence held by a corporation or partnership with no birth month, which instead renews on the month it was originally issued. A contractor licence cannot stand alone: it requires an affiliated licensed master electrician and proof of insurance. Renewing late adds a flat $50, and reinstating a terminated licence costs the full renewal fee again on top of the missed one. This regulation is the newest of Kentucky's three trade fee schedules, current from May 2025.