Cook County, Illinois business licensing
Last updated: August 1, 2026
A Cook County address can be in Chicago, in a suburban city or village, or in unincorporated Cook County. That difference decides which local office handles your business license, zoning, occupancy, building, food, liquor, and other permits.
This guide shows you how to find the right local government first, then check the separate Illinois and federal steps. It also explains why an LLC, assumed name, tax registration, and business license are not the same thing.
Bottom line
Do not apply for a Cook County General Business License until you confirm that your business is in unincorporated Cook County. That county license is mainly for businesses outside municipal boundaries. A business inside Chicago normally starts with the City of Chicago. A business inside Evanston, Skokie, Schaumburg, Oak Park, Cicero, or another suburb starts with that city or village.
Local approval is only one layer. You may also need an Illinois entity filing, an assumed business name, Illinois Department of Revenue registration, an employer account, a professional license, an EIN, or an industry permit. Our Illinois business license guide explains the state layer in more detail.
Quick start: find the right office before you pay
- Write down the exact business address. Include the place where you work, store inventory, prepare food, keep equipment, meet customers, or park business vehicles.
- Confirm the government boundary. Do not trust only the mailing city name. Use the Cook County Business License Portal address check or ask the municipality and county to confirm whether the property is incorporated.
- Describe the real activity. “Consulting” is different from a salon, restaurant, contractor yard, daycare, auto repair shop, online store with inventory, or food truck.
- Check zoning before signing a lease. Ask whether the use is allowed, whether a certificate of occupancy is needed, and whether building, fire, parking, sign, or public-way review applies.
- Check local licensing. Apply with Chicago, the suburb, or Cook County only after you know which office has authority over the address.
- Check state and federal layers separately. A local license does not create an LLC, register sales tax, license a profession, or issue an EIN.
Which government layer handles what?
| Layer | What it may handle | What it does not replace |
|---|---|---|
| Federal | EINs, federal taxes, and licenses for federally regulated work. | City or county licensing, Illinois tax registration, zoning, and local permits. |
| Illinois | LLC and corporation filings, tax accounts, employer registration, professional licenses, and state-regulated industries. | Local business licenses, local zoning, occupancy, and local health approval. |
| Cook County | Licensing and zoning in unincorporated areas, assumed names for certain business types, county taxes, and some health or environmental programs. | A Chicago or suburban municipal license. |
| Chicago or suburb | Local business license or registration, zoning, occupancy, building, fire, signs, food, liquor, local taxes, and activity-based permits. | Illinois entity, tax, employer, or professional licensing steps. |
| Private rules | Lease, landlord, HOA, insurer, bank, franchise, marketplace, and payment-platform requirements. | Government approval. |
These items solve different problems. Read our comparison of a business license, LLC, DBA, and seller’s permit before paying a filing company that treats them as one package.
First decision: Chicago, a suburb, or unincorporated Cook County?
Cook County contains Chicago and many separate municipalities. Each municipality can set its own local licensing and land-use rules. The county government becomes the main local authority for many businesses only when the property is in an unincorporated area.
A mailing address can mislead you. A property may use a nearby city name for mail but sit outside that city’s legal boundary. Ask for written confirmation when the boundary is unclear. A wrong jurisdiction can mean paying the wrong fee, missing zoning review, or opening without the right approval.
Questions to ask about the address
- Is the property inside Chicago or another incorporated municipality?
- Who controls zoning and issues the certificate of occupancy?
- Does the local government require a general license, registration, or only activity-based permits?
- Does a separate health department serve this address?
- Will signs, outdoor seating, customer parking, deliveries, storage, or business vehicles need review?
Unincorporated Cook County business requirements
If the business address is outside every city or village, start with Cook County Department of Revenue and Cook County Building and Zoning. Other county offices may join the review based on the activity.
Cook County General Business License
Cook County says businesses operating in unincorporated Cook County must obtain a General Business License unless another county license or an exemption applies. The county lists three common triggers: maintaining a fixed place of business, owning or leasing real property for business purposes, or regularly keeping goods for sale in unincorporated Cook County.
The official page currently lists a $40 fee for the two-year period from March 1, 2025 through February 28, 2027. It also lists a $40 penalty for failure to purchase by March 1, 2025. A business opening later should ask the county how the current period and any penalty apply to a new operation. Fees and periods can change.
The county license page lists 312-603-6961 and CCGBL@cookcountyil.gov. The online portal also accepts applications for the county General Business License, General Liquor License, Alarm Permit License, and Video Gaming License.
Zoning and business occupancy
A license does not prove that the property may be used for your activity. Cook County says a building or land use in an unincorporated area may not be established, changed, expanded, altered, or occupied until the Department of Building and Zoning issues the required certificate of occupancy.
The current Business Occupancy page lists a $250 application fee. It also says a home-based business owner must submit an affidavit and that no fee is required for that home-based request. Confirm both the zoning classification and the current application instructions before paying. The county’s unincorporated zoning lookup can help you start, but a map result is not a final approval.
County taxes and activity-based permits
Cook County’s Department of Revenue administers several home-rule taxes and fees. The list includes taxes connected to alcohol, amusements, cigarettes, fuel, parking, use, and other activities. This does not mean every business owes every county tax. It means you should review the Cook County Department of Revenue page if you operate a hotel, parking facility, amusement, fuel, alcohol, or another listed activity.
| Business activity | County office to check | Why |
|---|---|---|
| Restaurant, market, mobile food, temporary food, or cottage food | Cook County Department of Public Health food licensing | CCDPH licenses food establishments in unincorporated areas and handles other food programs in parts of suburban Cook County. Ask which health authority serves the address. |
| Retail alcohol sales | Cook County Liquor Control Commission | The commission regulates liquor licensing and sales in unincorporated Cook County. State liquor approval may also apply. |
| Construction work | Cook County contractor registration | Cook County says contractors doing work in unincorporated Cook County must register with Building and Zoning. |
| Building alteration or change of use | Cook County Building and Zoning | A building permit, occupancy review, inspections, or trade permits may be needed before opening. |
City of Chicago business license rules
A business inside Chicago normally starts with the Chicago Department of Business Affairs and Consumer Protection, called BACP. The city says BACP issues business licenses to businesses operating in Chicago. Use the city’s business license application page and business license type guide to identify the correct license.
Applications can be started through Chicago Business Direct or with the Chicago Small Business Center. BACP lists 312-74-GOBIZ (312-744-6249) and businesslicense@cityofchicago.org for help.
Zoning comes before approval
Chicago says every new business license, location expansion, and change-of-location application needs zoning review before the license can be processed. Give the city a complete description of the business. A shop that only sells packaged goods is not the same use as a restaurant, repair operation, warehouse, salon, body art studio, or entertainment venue.
License fees vary by type and are non-refundable. Some licenses need inspections after payment. Do not copy another business’s fee or assume its inspection path will match yours.
Home, food, signs, and public-way uses
Chicago says a city business license is required to operate a business from a home, and only certain activities qualify as a home occupation. Check the city’s home-based business rules before using a residence for clients, inventory, classes, deliveries, employees, or equipment. Our home occupation permit guide explains why this approval is different from an LLC or tax account.
A fixed food business may need a Retail Food Establishment license. Chicago says the license applies when food is prepared, served, stored, sold, or distributed from a building or fixed establishment. Use the city’s food license pages before building a kitchen or buying equipment.
Signs, awnings, canopies, lighting, sidewalk items, and other uses on, over, or under the public way can need separate permits. A city business license does not automatically approve them.
For a deeper city-only checklist, use our Chicago business license guide.
Suburban Cook County: each city or village sets its own path
There is no single suburban Cook County business license. A suburb may require a general registration, a business license tied to occupancy, or only licenses for certain activities. Some also use their own health department or contract with Cook County Public Health.
The examples below show why you must check the exact municipality. They are not a complete list of Cook County suburbs.
| Municipality | What the official page says | Best first step |
|---|---|---|
| Evanston | The city requires business registration for an individual or entity conducting for-profit business within city limits. Registration renews annually by April 1. | Review Evanston Business Registration before opening or renewing. |
| Skokie | The village connects business licensing with certificate-of-occupancy and zoning questions. Home businesses have separate operating limits. | Start with Skokie’s Certificates of Occupancy and Business Licenses page. |
| Schaumburg | The village issues business licenses and uses a combined occupancy and licensing process for many commercial locations. | Review Schaumburg business licensing and ask whether a new tenant occupancy review applies. |
| Oak Park | The village portal supports business registration, permit applications, fee information, and property records. | Use Oak Park’s Business and Building portal before choosing a site. |
Moving across a street can change the rules. A delivery business based in Chicago, a warehouse in Skokie, and a home office in unincorporated Cook County can face three different local processes even though all are in Cook County.
Illinois state requirements are separate
LLC, corporation, and assumed name
If you form an LLC, corporation, limited partnership, or similar entity, use the Illinois Secretary of State Business Services. The entity filing creates or registers the legal business. It does not approve your location or replace a local license.
For an assumed business name, the correct office depends on the structure. The Cook County Clerk says sole proprietorships, general partnerships, and professional service corporations are among the business types that may file with the clerk. Corporations, LLCs, LLPs, and nonprofits generally use the Secretary of State. Start with the Cook County Clerk assumed name page. An assumed name is a public name filing, not permission to operate.
Illinois tax registration
The Illinois Department of Revenue says a new business or a business new to Illinois should register before making sales or hiring an employee when registration applies. The main online path is Illinois business registration through MyTax Illinois using Form REG-1.
Illinois may issue a Certificate of Registration or another tax license based on the activity. This is often what people mean when they ask for an Illinois “seller’s permit,” but Illinois uses its own terms. Read our seller’s permit versus business license guide so you do not confuse tax registration with local operating approval.
Employees and professional licenses
Illinois Department of Employment Security says a newly created employing unit must register with IDES within 30 days of startup. Employers can begin through IDES new-employer registration and MyTax Illinois.
Many occupations and businesses are regulated by the Illinois Department of Financial and Professional Regulation. Use the IDFPR license lookup and profession pages for fields such as real estate, health care, cosmetology, certain financial services, and other regulated work. A professional license does not always replace a local business license or zoning approval.
Federal requirements to check
There is no general federal business license for every small business. Federal permits usually depend on the activity. The U.S. Small Business Administration licensing guide points businesses to federal agencies for regulated fields and reminds owners that state and local rules still apply.
An Employer Identification Number is a federal tax number, not a license. The IRS issues EINs online for free. The IRS says an EIN is generally needed for businesses that hire employees, operate as a partnership or corporation, pay certain federal taxes, or meet other listed conditions. Form the state entity first when the IRS instructs you to do so.
Common Cook County business situations
Home-based service business
Check whether the home is in Chicago, a suburb, or unincorporated Cook County. Ask about customer visits, nonresident employees, deliveries, inventory, signs, parking, equipment, and business vehicles. Government approval also does not override a lease or HOA rule. See how to check a home business.
Online store with inventory
Check local zoning where inventory is stored and orders are packed. Then check Illinois tax registration, marketplace sales, direct website sales, assumed name rules, and product-specific regulation. Our online store license guide covers the operating model.
Food truck or mobile food business
Local business licensing is only one part. Ask the health authority about plan review, mobile food approval, commissary or servicing rules, inspections, food manager requirements, fire review, and every city where you plan to vend. Use our food truck permit guide as a checklist.
Contractor or mobile service
Your home base, storage yard, and each work site can matter. A contractor working in unincorporated Cook County must check county contractor registration. Chicago and suburbs may have their own contractor, trade, permit, or local business rules.
Common mistakes
- Applying to the county just because the address is in Cook County. A city or village usually controls local licensing inside its limits.
- Signing a lease before zoning review. The proposed use may be blocked or may need expensive changes.
- Thinking an LLC is a license. An LLC is a state business structure.
- Treating a DBA as approval to open. An assumed name only addresses the name filing.
- Opening while an inspection is pending. Food, occupancy, fire, building, liquor, or activity-specific approval may be required first.
- Using another business’s fee or renewal date. Costs and cycles can vary by license type and municipality.
- Assuming a marketplace handles everything. A platform may collect some sales tax but does not issue your local license or zoning approval.
Simple call or email script
Ask the local office
“I plan to operate a [type of business] at [full address]. I will [describe products or services]. Customers will [visit or not visit], and I will [store inventory, prepare food, park vehicles, use signs, or employ workers]. Is this address inside your jurisdiction? Which business license, zoning, occupancy, building, health, fire, or other approvals must be completed before I open?”
Ask the employee to spell the exact permit names and send links by email. Save the response with your records.
Related business license guides
Start with the closest next-step guides, then explore other BLG location and licensing resources.
Best next guides
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Frequently asked questions
Does every Cook County business need a county business license?
No. The Cook County General Business License mainly applies to businesses operating in unincorporated Cook County, unless another county license or an exemption applies. Businesses inside Chicago or another municipality normally start with that city or village.
How do I know whether my address is in unincorporated Cook County?
Use the address or property check linked from the Cook County Business License Portal and confirm with Cook County Building and Zoning or the nearby municipality. Do not rely only on the mailing city name.
Do Chicago businesses need the Cook County General Business License?
A business operating at a Chicago location normally uses the City of Chicago licensing process, not the county General Business License for unincorporated areas. It may still have separate Cook County, Illinois, and federal duties.
Does forming an Illinois LLC give me permission to operate?
No. An LLC filing creates or registers a state business entity. It does not replace local business licensing, zoning, occupancy, tax registration, food permits, professional licenses, or other approvals.
Where do I file a DBA or assumed business name in Cook County?
The correct office depends on the business structure. Sole proprietorships, general partnerships, and certain professional service corporations may file with the Cook County Clerk. LLCs, corporations, LLPs, and nonprofits generally use the Illinois Secretary of State for entity and assumed-name filings.
Can I run a business from my Cook County home?
Possibly, but the rule depends on whether the home is in Chicago, a suburb, or unincorporated Cook County and on what the business does. Check customer visits, employees, deliveries, storage, signs, vehicles, noise, food, and lease or HOA limits.
Who licenses a food business in suburban Cook County?
The answer depends on the address. Cook County Public Health licenses food establishments in unincorporated areas and serves other parts of suburban Cook County, while Evanston, Skokie, Oak Park, Stickney Township, Chicago, and some other local systems may use a different health authority. Confirm before applying.
Can I open while zoning, occupancy, or inspection approval is pending?
Do not assume you can open. Cook County and local municipalities may require zoning, occupancy, health, fire, building, or license approval before operation. Ask the responsible agency for written permission before serving customers or using the space.
Careful disclaimer
This article is general information, not legal, tax, accounting, insurance, zoning, or professional advice. Rules depend on the exact address, business activity, ownership, products, services, employees, and property use. Fees, forms, office names, portals, and renewal rules can change. Confirm current requirements with the responsible government office before paying, signing a lease, building out a space, buying regulated equipment, or opening.