Kentucky has a mandatory statewide residential building code, and it applies to the roof on your house. It also says, in the same regulation, that permits and inspections are not required for a single-family dwelling unless a local ordinance requires them. Both of those things are true at once, and the gap between them is where most homeowner confusion about re-roof permits lives.
Does Kentucky require a permit to replace a roof on a house?
Not at the state level. 815 KAR 7:125 provides that permits, inspections and certificates of occupancy are not required for a single-family dwelling unless required by local ordinance.
That is an exception written into the residential code itself, not a loophole. The same regulation makes the residential code mandatory for all single-family dwellings, two-family dwellings and townhouses built in Kentucky. So the construction standard is statewide and compulsory; the enforcement mechanism — whether anybody pulls a permit and comes to look — is a local decision made by your city or county.
Which means the honest answer to “do I need a permit for my re-roof?” is: ask the jurisdiction the house actually sits in. Richmond, Berea, and unincorporated Madison County are not obliged to answer that question the same way, and a contractor who tells you “Kentucky doesn’t require one” has answered only half of it.
No permit required does not mean no code required. The standard applies whether or not anyone shows up to check it.
Which code book is actually in force right now?
The 2015 International Residential Code, as amended by the 2018 Kentucky Residential Code. The current incorporation is the Third Edition of the Kentucky Residential Code, dated August 2024.
815 KAR 7:125 incorporates both documents by reference and states that the Kentucky amendments supersede any conflicting provision in the 2015 IRC. The regulation’s own history line records the most recent version as effective 3 December 2024, filed with the Legislative Research Commission on 13 August 2024. The material is held at the Department of Housing, Buildings and Construction in Frankfort.
Two details in that sentence matter on a real job. First, the edition year of the base IRC and the edition year of the Kentucky amendments are different numbers — 2015 and 2018 — and quoting one without the other is how people end up citing a provision Kentucky changed. Second, the Kentucky amendment document was revised as recently as last year, so a detail a roofer learned a decade ago is not automatically current.
What if the building is not a single-family house?
Then the exception does not apply to it, and a different code book does. Residential occupancies that are not single-family dwellings, two-family dwellings or townhouses fall under the 2015 International Building Code and the 2018 Kentucky Building Code.
That line is written directly into 815 KAR 7:125 as its second exception, and it is the state-level version of a boundary we have looked at from the local side before: Lexington’s own published code list draws the same division at two families, which is the subject of which rulebook your re-roof answers to. A triplex, an apartment building, a church or a commercial roof is on the other side of that line, and the permit-exception for single-family dwellings does not reach it.
| Building | Governing code | State permit exception? |
|---|---|---|
| Single-family dwelling | 2015 IRC + 2018 Kentucky Residential Code | Yes — unless local ordinance requires one |
| Two-family dwelling / townhouse | 2015 IRC + 2018 Kentucky Residential Code | Exception is written for single-family dwellings |
| Three or more units, commercial | 2015 IBC + 2018 Kentucky Building Code | No |
How do you find out what your own jurisdiction requires?
Ask the office that issues building permits where the property sits, and ask it before the tear-off rather than after. In Madison County the county publishes a Planning and Development department with building permit applications through its official site.
The Madison County Planning and Development page is where the county’s permit applications are published. Inside a city’s limits the answer may come from the city rather than the county, which is why “Madison County” and “Richmond” are not interchangeable when you are asking this question. Two practical notes: a permit requirement can attach to work that is not a full replacement, and a homeowner’s insurance claim or a future buyer’s inspection may ask for permit records regardless of whether the jurisdiction required one at the time.
What this means for how we work
The useful habit is to treat the permit question and the code question as two separate questions, asked in that order. Whether a permit is required is local and answerable with a phone call. Whether the work meets the residential code is statewide, mandatory, and not contingent on anyone inspecting it — which is exactly why it is worth caring about on jobs where nobody will.
Where a permit is required, pulling it is the contractor’s normal part of the job and belongs in the written scope. Where one is not, the specification still belongs in writing — underlayment, fastening, flashing, ventilation — because that document is the only record that the mandatory standard was met. The same logic applies to reading a roofing estimate: what is written down is what can be verified later.
Common questions
If no permit is required, does the code still apply to my roof?
Yes. 815 KAR 7:125 makes the residential code mandatory for single-family dwellings built in Kentucky. The permit exception in the same regulation removes the permitting and inspection requirement at state level; it does not remove the construction standard.
Which edition of the code is in force?
The 2015 International Residential Code together with the 2018 Kentucky Residential Code, Third Edition, August 2024, incorporated by reference in 815 KAR 7:125. The Kentucky amendments supersede any conflicting provision of the 2015 IRC.
Does the exception cover a duplex?
The exception in 815 KAR 7:125 is written for a single-family dwelling. Two-family dwellings and townhouses are governed by the same residential code, but the permit question for them should be confirmed with the local permitting office rather than assumed.
Code provisions above are quoted from 815 KAR 7:125, Kentucky Residential Code, as published by the Kentucky Legislative Research Commission and retrieved 23 September 2026. Local requirements vary; confirm with the permitting office with jurisdiction over the property. Last updated 23 September 2026.
By Marcos Gil, REALTOR® — Keller Williams Commonwealth · KY Real Estate License No. 296259 · Call or text (859) 310-1209.
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