Kendall County’s Planning, Building and Zoning Department issues building permits and enforces development rules in the unincorporated county and the incorporated villages of Millbrook and Plattville, through its Building Division and Planning and Zoning Division. The latest Census estimate puts Kendall County at 145,470 residents, up from an estimates base of 131,876; 25,964 live in the unincorporated balance.
This guide covers the county office, the Soil & Water Conservation District and the City of Yorkville. The county’s and the county health department’s websites blocked automated checks, so county fees, inspections, well and septic and highway permits are not covered here; contact the county directly.
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Get a free quote →Who handles permitting in Kendall County?
| Office | Handles | Contact |
|---|---|---|
| Planning, Building and Zoning Department | Building permits and development rules in the unincorporated county, Millbrook and Plattville; 504 S. Main St, Yorkville, IL 60560 | 630-553-4141; M-F 8:00a - 4:30p |
| Kendall County Soil & Water Conservation District | Natural Resource Information (NRI) reports; 7775A Route 47, Yorkville, IL 60560 (USDA Service Center) | (630)553-5821 extension 3; info@kendallswcd.org; Monday to Friday 8:30 am to 4:00 pm |
| United City of Yorkville Building Department | Building permits in Yorkville; City Hall, 651 Prairie Pointe Drive, Yorkville, IL 60560 | 630-553-4350; bzpermits@yorkville.il.us; 8:00 am - 4:30 pm |
The county’s most populous municipalities in the latest Census estimates are the Kendall County part of Oswego (39,948) and Yorkville (26,730), followed by parts of Joliet (14,550) and Plano (12,677). Only Millbrook and Plattville are named as villages served by the county department, so in other cities and villages check with the municipality.
NRI reports from the Soil & Water Conservation District
The Kendall County SWCD prepares Natural Resource Information (NRI) reports for zoning variations, amendments and subdivision of vacant or agricultural land. They are ordered with the district’s NRI application, sent to Alyse@kendallswcd.org.
Not sure this scope needs a permit?
Get a free quote →What requires a permit in Yorkville?
In Yorkville, a new business moving into an existing commercial space needs a commercial occupancy permit, and replacing, repairing or installing a roof or siding needs a roof/siding permit. A fence may be built up to or on the property line; a fence in a utility easement needs a notarized Release & Hold Harmless Agreement. Commercial plumbing or roofing work needs a copy of a certified Illinois State License.
Illinois leaves building codes to local government, but since 1 January 2025 any local code must regulate structural design at least as strictly as baseline editions of the International Building, Existing Building and Residential Codes, and where no code was adopted the statute sets minimums for commercial buildings and new homes (Public Act 103-0510). Illinois codes and the statewide baseline
Rather talk it over?
Call 1-855-478-4290 →How to get a building permit in Yorkville
Send the building permit to bzpermits@yorkville.il.us.
The city contacts you by phone or e-mail when the permit is approved.
At the Building Department, or by credit card by phone at 630-553-8545.
By phone or e-mail.
A building permit carries a validity period set by the county or city that issues it; confirm the expiry on phased or delayed work before it passes. Permit validity in Illinois
Building codes in Yorkville
Yorkville’s adopted codes are the 2018 International Building, Residential, Mechanical and Fire Codes, the 2017 NEC and the 2021 International Energy Conservation Code.
Zoning applications in Yorkville
Yorkville’s Community Development applications include rezoning, special use, variance, PUD, annexation and a Stormwater Permit Application, and the city publishes Planning and Zoning Commission submittal deadlines.
Rather not deal with the Kendall County building department?
Get a free quote →Official Kendall County permitting resources
These are the primary sources behind this guide. Codes, fee schedules and procedures change — confirm the position for your filing date.
- Kendall County Planning, Building and Zoning
- Kendall County SWCD NRI reports
- Kendall County SWCD contact
- Yorkville building permit applications
- Yorkville Community Development
Frequently asked questions
Want this handled start to finish?
Get a free quote →Does Kendall County issue permits in Millbrook and Plattville?
Yes. The Planning, Building and Zoning Department covers the unincorporated county and the incorporated villages of Millbrook and Plattville.
Where is the Kendall County permit office?
504 S. Main St, Yorkville, IL 60560, 630-553-4141, M-F 8:00a - 4:30p.
Can I e-mail a building permit application in Yorkville?
Yes, to bzpermits@yorkville.il.us; the city contacts you by phone or e-mail when it is approved.
Simplify Kendall County permitting with Alliance Permitting
- Confirm whether the county or a city or village has the parcel, and which office to file with
- Line up the health, highway and floodplain approvals that come before the building permit
- File with the right office and keep inspections on schedule
Inspections are where schedules slip.
Get a free quote →Alliance Permitting is a permit documentation and submission company in Illinois. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.
Ready to break ground in Kendall County sooner?
Let Alliance prepare, file, and track your Kendall County permits while your crew stays on the job.
More Illinois permitting guides
This guide is provided by Alliance Permitting for general information about Kendall County permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.