Louisville Metro's Department of Codes and Regulations, through its Office of Construction Review at 444 South Fifth Street, permits and inspects construction across the whole of Jefferson County — city and county are the same jurisdiction, coextensive since the 2003 merger, and one department covers the lot. Its ordinance adopts the Kentucky Building Code and Kentucky Residential Code in full, making them the official standards for all construction and permitting within the Metro area, which is what the Commonwealth's mini/maxi framework requires of every local government.
The complication is the small cities. Several dozen incorporated cities sit inside the Metro boundary without expanded jurisdiction for construction, and the Office of Construction Review coordinates its reviews with them where needed; by agreement with Metro, some of those cities issue sign permits themselves, and where they do, separate approval from Louisville Metro is not required. A project inside one of them should confirm the position with the city before work begins rather than assume the Metro office covers everything.
This guide covers Louisville Metro, which is coextensive with Jefferson County. Oldham, Bullitt, Shelby and Spencer counties to the east and south run their own arrangements, and the small cities inside the Metro boundary should be checked individually on signs.
One government, dozens of small cities inside it. Louisville Metro permits the whole of Jefferson County, but small cities within the Metro boundary that do not have expanded jurisdiction for construction are coordinated with by the Office of Construction Review, and by agreement some of them issue sign permits locally — in which case separate Metro approval is not required. Check the city before the project starts.
What requires a building permit in Louisville Metro?
Kentucky runs a mini/maxi code, and the phrase carries real weight. The Kentucky Building Code at 815 KAR 7:120 and the Kentucky Residential Code at 815 KAR 7:125 are statewide, uniform and mandatory, and no local government may adopt or enforce any other building code — the code is both the minimum and the maximum. The Department of Housing, Buildings and Construction adopts them; Louisville Metro enforces them. The current editions are the 2018 Kentucky Building Code, Fourth Edition and the 2018 Kentucky Residential Code, Third Edition, both built on the 2015 International Codes with Kentucky amendments that supersede any conflicting model provision. Detached one- and two-family dwellings and townhouses fall under the residential code; everything else under the building code. What is local in Louisville Metro is the inspection programme, the fee schedule, zoning and planning, contractor registration, and Metro's own contractor licensing and the small cities inside its boundary.
The codes draw the exemption line and it is the same line across the Commonwealth. Ordinary repairs need no permit; constructing, altering, repairing, moving, demolishing or changing the occupancy of a building does. Electrical, plumbing and heating and air work carry their own permits and their own state licences, and Louisville Metro's zoning and planning approvals sit outside the building code entirely — a municipality may not add building requirements, but it may and does regulate use, setbacks and site development.
Typically permit required
- Any construction, alteration, repair, demolition or change of occupancy under the Kentucky Building Code or Residential Code
- Local contractor licensing through Metro, which is separate from the state trade licences
- Signs, which some small cities inside the Metro boundary permit themselves by agreement
- New buildings, additions and any structural work on an existing building
- Alterations, repairs and renovations under the building or residential code, and any change of occupancy
- Decks, accessory structures above the code threshold, retaining walls and swimming pools
Often exempt
- Ordinary repairs that do not alter structure, egress or systems
- Ordinary repairs that do not alter structure, egress or systems
- Painting, papering, flooring, cabinets and similar finish work
- Like-for-like replacement that the codes place below the permit threshold
- Small accessory structures below the code's threshold — the zoning ordinance still applies
What is actually local, and what is not
The code is the Commonwealth's and cannot be added to. Louisville Metro's layer is its building inspection programme and the certified inspectors staffing it, the fee schedule its ordinance sets, the zoning ordinance and planning commission that govern use and site development, any local contractor registration it requires, and the small cities inside the Metro boundary and Metro's own contractor licensing, which the state does not issue.
Who handles permitting in Louisville Metro?
The Department of Codes and Regulations is the enforcing authority, with the Office of Construction Review handling permits, plan review and inspections, and Metro's own contractor licensing operating alongside the state trade licences. Planning and Design Services administers the Land Development Code and zoning, the small cities inside the boundary are coordinated with on review, and the state Department of Housing, Buildings and Construction retains its role on certain commercial projects, elevators and boilers.
| Detail | Information |
|---|---|
| Department | Louisville Metro Department of Codes and Regulations |
| Office | 444 South Fifth Street, Suite 200, Louisville, KY 40202 |
| Phone | (502) 574-2508 |
| Hours | Monday to Friday, 8:00 am to 5:00 pm |
| Filing | Metro's online permitting portal, with a public permit search by number, address or contractor |
| Contractor licensing | Required by Metro, separately from the state trade licences |
Permit types
Residential permits
A Louisville house project files through Metro's online portal against the Kentucky Residential Code as adopted by Metro ordinance and the Land Development Code's zoning requirements. The contractor holds Metro's own licence — Kentucky issues no statewide general contractor licence, so the local credential is the one that matters — and the electrical, plumbing and heating and air work is carried out by contractors holding the state licences the department issues.
How Kentucky contractor credentials work
Kentucky issues no statewide general contractor licence. The Department of Housing, Buildings and Construction licenses the specialty trades — electrical contractors and electricians, plumbing contractors and plumbers, heating and air conditioning contractors, along with boiler, fire sprinkler and fire alarm contractors and the building inspectors themselves — and those licences are valid across the Commonwealth. General contracting is regulated locally instead: a city or county may require its own contractor licence or registration, and one jurisdiction's licence does not carry into the next. Louisville Metro's own requirement, if it has one, is the credential to confirm before a permit is pulled, alongside the state trade licences the department verifies at the counter.
Commercial permits
Commercial work in Louisville Metro runs through the Office of Construction Review, with the department's plan reviewers checking against the Kentucky Building Code as adopted; the state Department of Housing, Buildings and Construction retains a role on certain commercial projects, elevators and boilers. Metro publishes a step-by-step guide and a worked submission example, and its business portal lets anyone search permits, planning and zoning applications and property maintenance cases by address or contractor.
Plan review, local programmes and the state's role
Kentucky splits plan review between the state and the locality. The Department of Housing, Buildings and Construction's Division of Building Code Enforcement reviews plans and inspects new construction, additions, alterations and changes of occupancy for buildings under the Kentucky Building Code, unless the local government operates a certified programme holding that authority itself — and a local government running an inspection programme must provide at least one Kentucky Certified Building Inspector and at least one certified electrical inspector, reporting them to the department. Zoning approval, planning commission review and site development sit with Louisville Metro and run ahead of the permit. In Louisville Metro the Land Development Code and its zoning overlays govern setbacks and lot coverage, the Ohio River floodplain and the Metropolitan Sewer District's stormwater requirements reach a large share of the county, and preservation districts govern much of the older city. Fees a local government charges are required by statute to cover the cost of the service performed and not to exceed it.
Louisville Metro permit costs and fees
Fees follow Metro's published schedule, paid through the online portal, with the state's own plan review and inspection fees applying where the department retains that role.
| Item | Fee or rule |
|---|---|
| Building permit | Metro's published fee schedule, by project type and construction value |
| Contractor licence | Metro licensing, separate from and additional to the state trade licences |
| Trade permits | Electrical, plumbing and heating and air permits by state-licensed contractors |
| Signs | Permitted by some small cities inside the Metro boundary by agreement |
| State fees | Department of Housing, Buildings and Construction fees where it reviews the project |
| Statutory limit | Local fees may not exceed the cost of the service performed |
The licence that matters here is local. Kentucky issues no statewide general contractor licence, so Louisville Metro's own contractor licensing is the credential a general contractor needs — and it does not carry to Lexington, Bowling Green or Northern Kentucky. The state licences cover only electrical, plumbing, heating and air, boiler, fire sprinkler and fire alarm work.
Trade permits and who may pull them
The trades are permitted separately from the building permit and carried out by contractors holding the state licences the Department of Housing, Buildings and Construction issues.
Permit required
- General contracting — Louisville Metro's own contractor licence, since the state issues none
- Electrical — state-licensed electrical contractor; separate permit and a certified electrical inspector
- Plumbing — state-licensed master plumber or plumbing contractor; separate permit, inspected under the state plumbing code
- Heating and air conditioning — state-licensed HVAC contractor; separate mechanical permit
- Fire sprinkler and fire alarm — state-licensed contractor, with State Fire Marshal review where it applies
Typically exempt
- Like-for-like replacement the trade codes place below the permit threshold
- Work a homeowner may perform on their own residence where the local programme allows it
How to apply for a Louisville Metro building permit
Zoning approval, and planning commission or site development review where the ordinance requires it, precede the building permit.
Commercial plan review sits with the state department unless the local programme holds that authority; residential is local.
The state licenses the trades; general contractor registration, where it exists, is the city's or county's own.
Reviewed against the Kentucky Building Code or Kentucky Residential Code as adopted, with no local amendments to satisfy.
Fees are set by local ordinance and by statute may not exceed the cost of the service performed.
Footing to final, with the trades inspected on their own permits, then the certificate of occupancy.
Review, corrections and what actually causes delay
Louisville Metro reviews through the Office of Construction Review, publishing a step-by-step guide and a submission example for applicants. What delays a file here is a project inside a small city whose own sign or review position was not checked, and a contractor licensed in another Kentucky jurisdiction but not in Metro.
Inspections in Louisville Metro
Inspections follow the codes' sequence — footing, foundation, framing, rough trades, insulation and final — and are requested from the local inspection programme by permit number, with the electrical inspections carried by a certified electrical inspector. Work that passes final receives a certificate of occupancy for new buildings and changes of occupancy. Louisville Metro inspects in the codes' sequence through the Office of Construction Review, with electrical inspections carried by a certified electrical inspector as the state regulation requires and the certificate of occupancy following the finals.
Louisville Metro permit search and official resources
- Louisville Metro building permits — the ordinance adopting the state codes and the small-cities arrangement
- Louisville Metro permits and licences — submittal documents, fees and licensing
- Kentucky Department of Housing, Buildings and Construction — the statewide codes and trade licensing
- Kentucky Department of Housing, Buildings and Construction — the statewide codes, trade licensing and the Division of Building Code Enforcement
- 815 KAR 7:120 — Kentucky Building Code — the mandatory uniform state building code and its general provisions
- 815 KAR 7:125 — Kentucky Residential Code — the code governing one- and two-family dwellings and townhouses
Frequently asked questions
Is Louisville separate from Jefferson County?
No. The city and county merged in 2003 and are coextensive; Louisville Metro's Department of Codes and Regulations permits construction across the whole county.
Do the small cities inside Metro issue permits?
Most do not have expanded jurisdiction for construction, though by agreement some issue sign permits locally, in which case separate Metro approval is not required. Check with the city first.
Which building code applies?
The Kentucky Building Code and Kentucky Residential Code, adopted in full by Metro ordinance; Kentucky's mini/maxi framework means no local government may adopt or enforce any other building code.
Do I need a Metro contractor licence?
For general contracting, yes — Kentucky issues no statewide general contractor licence, so the local credential is the one required, and it does not carry to other Kentucky jurisdictions.
Who licenses electricians and plumbers?
The state Department of Housing, Buildings and Construction, whose licences are valid across the Commonwealth.
Which code editions apply?
The 2018 Kentucky Building Code, Fourth Edition and the 2018 Kentucky Residential Code, Third Edition, both built on the 2015 International Codes with Kentucky amendments that supersede conflicting model provisions.
Simplify Louisville Metro permitting with Alliance Permitting
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More Kentucky permitting guides
More Kentucky permitting guides
This guide is provided by Alliance Permitting for general information about Louisville Metro permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.