A Louisville building permit is issued by the Metro Division of Construction Review, part of the Department of Codes and Regulations, and it’s required before you start most construction work governed by the Kentucky Building Code or Kentucky Residential Code.1Department of Housing, Buildings and Construction. Division of Building Code Enforcement Licensed contractors apply through the Accela online portal; homeowners doing their own work have to apply in person at 444 S. 5th Street in downtown Louisville.2Louisville Metro Government. Permits
When You Need a Permit
Kentucky law prohibits construction until a local building official issues a permit, and Louisville Metro has opted into inspecting single-family residences, so Jefferson County homeowners don’t have the leeway that exists in some rural counties.3Kentucky Legislative Research Commission. Kentucky Revised Statutes KRS 198B.060 – Local Enforcement of Uniform State Building Code
You need a permit for new construction, structural additions, any remodeling that moves or removes load-bearing walls, roof replacements that change structural elements, and commercial buildouts of any size. Electrical and HVAC work require their own separate permits, even when a general building permit already covers the project.2Louisville Metro Government. Permits A project that touches wiring, plumbing, or ductwork usually means pulling more than one.
Work That’s Exempt
Minor work that doesn’t affect structural integrity, fire safety, or egress is generally exempt:
- One-story detached residential accessory buildings under 200 square feet, such as sheds or playhouses
- Fences seven feet or shorter
- Retaining walls four feet or less, measured from the bottom of the footing to the top
- Standard driveways and sidewalks at grade
- Cosmetic interior work: paint, wallpaper, tile, carpet, cabinets, and countertops that don’t alter the structure
- Decks under 200 square feet that aren’t attached to the house, sit less than 30 inches above grade, and don’t serve a required exit door
Replacing a window or door in its existing opening doesn’t need a permit. Enlarging the opening does, because that alters the framing. The underlying principle is simple: if the work changes the building’s structure, capacity, or safety systems, assume a permit is required.
How to Apply
The application asks for a description of the work, the property’s legal description or street address, the intended use and occupancy, and construction documents showing the plans.2Louisville Metro Government. Permits New buildings and additions must include a current site survey sealed by a Kentucky Registered Land Surveyor, though the building official can accept other proof of location for simpler jobs.
Complex projects typically need drawings sealed by an architect or engineer, showing framing, electrical, plumbing, and mechanical placements in enough detail for a reviewer to check code compliance. Expect additional document requests for anything unusual, such as engineered trusses or commercial fire suppression.
Contractor Versus Homeowner
Licensed contractors apply through the Accela portal after requesting an account with the Division of Construction Review. They must hold a valid Louisville Metro contractor license, which requires Division approval and annual renewal.4Louisville Metro Government. Contractor Licenses
Homeowners pulling their own permits can’t use the online system. You have to go to 444 S. 5th Street in person.2Louisville Metro Government. Permits Plan that trip before you buy materials.
Clearances From Other Agencies
Any project that disturbs land or connects to the sewer needs separate review from the Louisville Metropolitan Sewer District, which handles grading, drainage, erosion control, floodplain compliance, and sanitary sewer service for any land-disturbing activity in Jefferson County.5MSD. Development and Stormwater Permitting Properties on septic need the local Health Department to certify capacity for the new construction. Lining up these approvals before you submit the building permit application avoids weeks of back-and-forth.
What It Costs
Louisville calculates permit fees by project type. For new construction, additions, and full building alterations, the fee is based on square footage at per-square-foot rates that vary by occupancy:6Louisville Metro Government. Permit Fees
- Residential (1 and 2 family): $0.105 per square foot
- Commercial/business: $0.15 per square foot
- Assembly: $0.16 per square foot
- Storage: $0.14 per square foot
- Utility and miscellaneous: $0.13 per square foot
Square footage is measured to the outside edges of the exterior walls and includes every floor, including finished basement areas. No permit fee is less than $75. A 2,000-square-foot single-family home runs about $210 for the building permit alone.
Partial alterations and projects where square footage can’t be calculated use a different formula: $50 plus $2.50 per $1,000 of estimated construction cost, as verified by the department. Foundation-only permits are $75 for single-family dwellings and $125 for everything else. If plan review happens but no permit issues, or you request a refund, a plan review fee applies — $30 or one-third of the normal permit fee, whichever is higher. A failed inspection carries a $40 re-inspection fee for the follow-up visit.7Louisville Metro Government. Office of Construction Review Permit Fees
How Long Review Takes
Once your application and documents are in, the Division assigns reviewers who check each element against the applicable code. Residential projects run about 10 business days for the initial review, with another 5 business days if revisions come back. Commercial projects run about 15 business days initially and 7 business days for revisions, so the total timeline typically lands near six weeks.8Louisville Metro Government. Plan Review
Contractors track status, receive notifications, and submit revisions through the Accela portal.9Louisville Metro Government. Online Permitting Portal Reviewers flag what doesn’t comply and tell you exactly what to change. Common revision triggers include incomplete structural calculations, missing fire-separation details on commercial jobs, and site plans that don’t clearly show setbacks.
Fast-Track for Early Start
Louisville offers a fast-track option for applicants who want approval to begin site work, foundations, or shell construction before submitting a complete set of construction documents. Foundation permits are charged at the standard foundation rate, and shell or phased work is charged the full per-square-foot fee. Interior finish and additional phases also pay the full fee.6Louisville Metro Government. Permit Fees It’s most useful for commercial developers who need to start site prep while the architect finalizes interior plans.
Inspections and the Certificate of Occupancy
An issued permit triggers a series of required inspections at construction milestones. The most common are foundation, framing and rough-in, and final.10Louisville Metro Government. Building Inspections You, the permit holder, schedule each one — inspectors don’t show up automatically.
Request an inspection through the Accela portal or by calling Metro311 at 311 or 502-574-5000. Work must stay accessible and uncovered so the inspector can see what was done, per Kentucky Building Code Section 109.1. Drywall over your framing before the rough-in inspection and you’ll tear it back out.
Each inspection ends in one of three results: passed (code compliant), partial pass (mostly compliant with minor documented issues), or corrections needed (not compliant, with notes on what must change). Follow-up inspections may carry the $40 re-inspection fee each time. Common rough-in failures involve electrical issues, such as missing GFCI protection in kitchens and bathrooms, and plumbing problems like leaky fittings or incorrect venting.
All required inspections must pass before Louisville Metro issues a Certificate of Occupancy or Letter of Acceptance. No one can legally occupy the building until that certificate is in hand.
Historic District Review
If your property sits in a designated historic preservation district or is an individually designated landmark, exterior work requires a Certificate of Appropriateness before you can get a building permit.11American Legal Publishing. Louisville Metro Code of Ordinances – Section 32.252 Historic Preservation Districts The certificate itself is free, but the review evaluates whether proposed changes fit the district’s architectural character, which adds time. Interior renovations in historic districts go through the standard permit process. For facade work, window replacement, additions, or significant changes to landscape structures on landmarked property, start the Certificate of Appropriateness early.
Penalties for Skipping the Permit
Working without a required permit violates the Uniform State Building Code, and each day the violation continues counts as a separate offense. Fines run from $10 to $1,000 per day under Kentucky law.12Justia Law. Kentucky Revised Statutes 198B.990 – Penalties An inspector who finds unpermitted work can stop the project until you apply for and receive the proper permits, and the new application requires the inspector to see every element that got covered up. That can mean opening finished walls to expose framing, wiring, or plumbing for review.
KRS 198B.060 also requires anyone pulling a permit to certify by affidavit that all contractors and subcontractors carry workers’ compensation and unemployment insurance. Falsifying that affidavit can bring a fine of up to $4,000 or the total value of any uninsured claims, whichever is greater.3Kentucky Legislative Research Commission. Kentucky Revised Statutes KRS 198B.060 – Local Enforcement of Uniform State Building Code The exposure from cutting corners dwarfs the cost of permitting the work properly from the start.