Short answer: it's a Skokie rule. Not Cook County's. Not Illinois'. And if you submit a scanned or photographed plat of survey with your building permit application in the Village of Skokie, it will come back rejected.
Here's the longer answer, because this exact confusion — assuming a local rule applies more broadly than it does — costs homeowners and contractors weeks of resubmittal delay, and it's an easy mistake to make.
Where the Confusion Actually Comes From
Illinois doesn't have a single statewide rule requiring a digital plat of survey. Cook County doesn't have one either — Cook County runs its own Department of Building and Zoning with its own separate digital submission requirements, but only for unincorporated areas within the county.
Skokie sits inside Cook County, but it's an incorporated village with its own building department and its own permit intake standards. If your project is in Skokie, Skokie's rules apply — not the county's, and not any statewide default. If your project is in Evanston, Niles, or unincorporated Cook County instead, you're dealing with an entirely different set of rules.
What Skokie Actually Requires
According to the Village's official building permit instructions, most construction permit types require a plat of survey meeting specific criteria — and the format matters as much as the content.
The file has to be the original digital file. Skokie states this directly: scans and photographs of a plat won't be accepted. Printing your plat, scanning it, and uploading a PDF doesn't satisfy the requirement — the village wants the actual digital export from the surveyor who prepared it.
The plat has to be recent enough for your specific permit type. Skokie's age requirements vary by project:
| Permit Type | Plat Age Requirement |
|---|---|
| Detached garages, residential additions, new residential buildings, mixed-use additions/new buildings, non-residential additions/new buildings, ground signage | Within 18 months of submittal |
| Flatwork (driveways, sidewalks), gazebos, pergolas, open covered porches, carports | Within 5 years of submittal |
| Decks, fences, hot tubs, pools, demolition, generators, EV charging, ground-level solar, tank removal, lifts, sprinklers, multi-level porches, battery storage, engineering permits | No fixed age limit — but the applicant must confirm it's accurate and shows every current improvement |
That last category is easy to misread as "no requirement." It isn't — it just shifts the burden onto you to confirm the survey genuinely reflects what's on the property right now. If you've added a shed, a fence, or anything else since the survey was done, an "undated" survey with a missing structure still gets flagged.
The Three Mistakes That Trip People Up Most
Assuming an old survey from when you bought the house still works. It might — if it's a digital file, it's recent enough for your specific permit type, and it shows everything currently on the property. Any one of those three failing means it doesn't.
Assuming the requirement is countywide. It's not. Cook County's digital submission rules exist, but they're different from Skokie's, and they only apply to unincorporated county land, not incorporated villages like Skokie.
Assuming a scanned copy is close enough. It isn't, and this is stated plainly in Skokie's own instructions — no scans, no photographs, original digital file only.
What to Actually Do About It
If you're a homeowner: confirm your project type requires a plat first — most construction permits do. Track down your original digital file if you have one; if you only have a paper copy, contact the surveyor who prepared it. Check the age requirement against your specific permit type before assuming an older survey is fine. If you don't have a compliant plat, budget $400–$800 or more for a new one from a licensed Illinois surveyor, on top of your permit fees.
If you're a contractor: build plat verification into your pre-construction checklist before you submit anything. Ask for the digital file specifically, not "a survey." Check the date against the permit type. Confirm it shows every improvement currently on the lot. If the homeowner doesn't have a compliant plat, budget 2–4 weeks of delay for scheduling a surveyor and receiving the digital file before you can even submit the permit application.
A Plat of Survey and a Site Plan Are Two Different Documents
Worth being precise about this distinction, since Skokie's permits often require both. A plat of survey is prepared and certified by a licensed land surveyor, establishing your legal property boundaries and existing conditions. A site plan is a scaled drawing showing your proposed project relative to those boundaries, structures, and easements.
Nothing replaces your plat of survey — that has to come from a licensed Illinois surveyor regardless of what else you use. But while you're waiting on that survey, the site plan component of your application can move forward in parallel. Check Illinois state coverage for your specific address first, since parcel data support varies by county and Cook County specifically isn't yet part of confirmed coverage — but building out your project layout and setbacks ahead of time still saves real steps once your survey arrives.
FAQ
Is a digital plat of survey required for a fence permit in Skokie?
Yes — Skokie requires a "clear and legible" plat of survey for fence permits, with no fixed age limit, but the applicant must confirm it's accurate and shows all current improvements. The digital file requirement applies regardless.
Can I use the plat of survey from when I bought my house?
Only if it's a digital file, it's recent enough for your specific permit type, and it reflects everything currently on the property. Any one of those failing makes it unacceptable.
What if my original surveyor is retired or out of business?
You'll need to hire a new surveyor for a current digital plat. The Illinois Professional Land Surveyors Association maintains a list, though it's not exhaustive and isn't an endorsement from the Village.
Does Cook County require a digital plat of survey too?
Cook County has its own digital submission requirements for unincorporated areas, but they're separate from Skokie's rules. If your property is inside Skokie village limits, Skokie's requirements apply, not the county's.
How long does it take to get a new plat of survey?
Typically 2–4 weeks from scheduling to receiving the digital file, depending on the surveyor's workload and weather conditions.
What does "original digital file" actually mean in practice?
The direct digital export or PDF the surveyor produced — not a printout that's been scanned or photographed afterward. Resolution and file integrity are why Skokie draws this line.
Do all Skokie permits require a plat of survey?
Most construction permits do, but requirements and age limits vary meaningfully by project type — check the table above against your specific project before assuming.
What's the actual cost of a new plat of survey?
Typically $400–$800 or more from a licensed Illinois surveyor, depending on lot size and complexity, on top of your standard permit fees.
Can SitePlans.ai replace my plat of survey?
No — a plat of survey has to come from a licensed surveyor. This helps you prepare the separate site plan component of your application while you're waiting on that survey.
What if I'm not sure whether my property is inside Skokie village limits?
Confirm with the Village directly before assuming either way — the wrong assumption here means preparing documents for the wrong jurisdiction entirely.
Create site plan for your project type
- Illinois permit site plan requirements
- What are plot plan requirements
- DIY site plan: what you can draw yourself
- How to enter a property address
- How to generate setbacks
Where This Leaves You
The digital plat of survey requirement belongs to Skokie specifically — not Cook County, not Illinois. Check your permit type, confirm your plat meets the age requirement, make sure it's a genuine digital file, and verify it shows everything currently built on the property. If any of that comes up short, you're looking at a new survey before you can submit at all.
While that survey is in progress, there's no reason your site plan has to wait too.
Working through a rejected submission, or want a professional to double-check your documents?