Does Any of This Need a Permit?
It is just a coating. Except the quote also mentions patching, a drain and an outlet - and those are three different trades wearing one invoice.
No website can answer this for your address, and any that tries is guessing. In Lake County the permit answer is held by whichever building department covers the parcel you are standing on, and there are dozens of them - each incorporated municipality runs its own, and unincorporated addresses answer to the county. What a page like this can usefully do is get you ready for one short phone call: split your quote back into the separate jobs it actually contains, work out which department you belong to, and settle in writing which party is responsible for obtaining anything required. Do those three things and the call takes four minutes.
On this page
Read the quote as several jobs, not one
The reason this question feels confusing is that a garage floor quote is frequently not a garage floor quote. The garage is empty, the crew is already on site, and it is a sensible moment to deal with the outlet you always wanted and the low corner that puddles. So other trades get bundled onto one page, and then the whole page gets thought about under one word.
Take the page apart. Every line belongs to a category, and the category is what matters.
| Line on your quote | What it actually is |
|---|---|
| Grind, patch hairline cracks, coat | Surface finish on an existing slab |
| Cut out and replace a section of slab | Concrete work |
| New floor drain or trench drain | Plumbing |
| New outlet, subpanel or charger circuit | Electrical |
| New overhead door or opener | Door and opening work |
| Opening the garage ceiling or the wall shared with the house | Assembly and separation work |
Six lines, five different sorts of work, and one office that decides how each is handled where you live. That is the honest state of affairs, and it is why the useful skill here is describing your scope accurately rather than hunting for a rule.
The general principle, and its limit
There is a principle worth knowing, and it needs its limit attached in the same breath. As a general matter, a finish applied to the surface of an existing slab is treated as a different sort of work from structural, electrical or plumbing work. That is why the coating and the outlet on your quote are not the same question.
The limit: that is a statement about categories in general, not about your property. It is not permission, it is not an exemption, and it is not a substitute for asking. Call the building department for the municipality your address sits in and put your actual scope to them. This site will not name a town and recite its rule, because being right about four of them and wrong about the fifth is how somebody ends up with a problem.
Need a written scope you can read out to a building department?
Every free on-site quote spells out exactly what is included, line by line.
Which department is even yours
Homeowners here are often surprised by this one. Illinois gives municipalities substantial authority over their own affairs - the background is under home rule - and building regulation is enforced locally, which is why an answer that holds in one Lake County town carries no weight three miles away. The building codes themselves are adopted and administered at that local level.
So step one is knowing where you live in the administrative sense, not the postal one. A mailing address that says a town name does not always mean you are inside that town.
- Inside an incorporated municipality - Waukegan, Gurnee, Zion, North Chicago, Beach Park, Park City and their neighbors each administer building matters for their own territory. Your department is theirs.
- In unincorporated Lake County - Lake County Planning, Building and Development is the department that handles permits and approvals for unincorporated areas.
If you are not certain which applies, your tax bill and assessment notice list the taxing bodies you sit in, and the county can confirm the rest. It is a five-minute check that decides which phone number is correct, and there is no point asking the right question of the wrong office.
The one move that is genuinely in your control
Here is the substantive thing you can do, and it has nothing to do with looking up rules. Your written quote should name which party obtains anything the work requires, and it should say so before work starts. Not a handshake on the driveway, not "we always take care of that", not a sentence added afterwards.
Three things should be answerable by reading the document rather than by remembering a conversation:
- If something on this scope requires a permit, who applies for it?
- If something has to be inspected, who arranges that and who is present?
- If the electrical or plumbing portion is going to a subcontractor, who is it, and are they the licensed party for that trade?
None of that is exotic to ask. A contractor who does this work in your area every week has answered it many times and will not be thrown by the question. Vagueness on the third point in particular is worth noticing, and it sits naturally alongside the rest of the vetting in how to vet a coating contractor.
TL;DR
There is no county-wide answer, so stop looking for one. Split the quote into its real trades: finish, concrete, plumbing, electrical, doors. Work out whether your address is inside a municipality or in unincorporated Lake County, because that decides who you call. As a general principle a surface finish on an existing slab is a different category from structural, electrical or plumbing work, but confirm your own scope with your own building department. And get it in writing, before work starts, which party is responsible for obtaining anything required.
What to say when you call
Have the written quote in front of you and read the scope rather than summarizing it. Something close to this works:
"My address is [address]. I am having the garage slab ground and coated. The same quote also includes replacing a section of slab near the door, adding one outlet, and a floor drain. Which of those, if any, needs a permit from your office, and who is expected to apply?"
Two habits make that call go better. Describe the work physically instead of using a product name, because "epoxy" means several different things and none of them are how a building department categorizes anything. And ask what they need from you rather than asking them to agree with a conclusion you have already reached.
While you are on the subject of paperwork, the related question homeowners ask next is whether any of this touches their assessment. That has its own answer and its own offices, covered in whether a coated floor affects your Lake County tax bill. If part of your scope is slab work rather than finish work, garage floor repair explains what that portion involves so you can describe it accurately. And when you want a scope in writing that is precise enough to read down a phone, ask for the free on-site quote - we itemize it, including anything that is not the coating.