Cook County Business License: Unincorporated Cook County Rules

If you are starting a business in unincorporated Cook County, Illinois, you need to understand that Cook County has specific licensing and registration requirements that differ significantly from businesses located in Chicago, Evanston, Skokie, Oak Park, and other incorporated municipalities. This guide walks you through exactly what licenses you need, what they cost, and how to file them.

What Is Unincorporated Cook County?

Cook County covers a large area of northeastern Illinois. However, much of it is divided into incorporated cities and villages. Unincorporated Cook County refers to the areas that are not part of any incorporated municipality. These areas are governed directly by Cook County government rather than by a local city or village. Common unincorporated Cook County areas operate under township administration.

The key point: if your business is in unincorporated Cook County, you answer to Cook County licensing requirements, not a city or village. The process and fees differ substantially from incorporated areas.

General Business License: $40 per Two Years

The Cook County Department of Revenue issues a General Business License that is required for most businesses operating in unincorporated Cook County. This is the primary business registration you need.

Fee and Duration

The General Business License costs $40 and is valid for two years. The current filing period runs from March 1, 2025 through February 28, 2027. You need to renew before the expiration date. If you file late, Cook County imposes a $40 late penalty, so plan to renew before the deadline.

Who Needs It

Most businesses in unincorporated Cook County are required to obtain a General Business License. This includes retail shops, service businesses, contractors, restaurants, professional practices, and home-based businesses. The license applies whether you operate as a sole proprietor, LLC, partnership, or corporation.

How to Apply

Contact the Cook County Department of Revenue to apply for your General Business License. You will need to provide your business name, location address (a street address in unincorporated Cook County), ownership information, and the type of business you operate. Applications are filed through the Department of Revenue's online General Business License portal; the office is at 118 N. Clark Street, Room 1160, Chicago (312-603-6961).

Certificate of Exemption

Not every business operation requires a General Business License. If your business is exempt from Cook County licensing requirements, you may be able to obtain a Certificate of Exemption instead. You are exempt if you already must hold another county business license under a county ordinance, or if federal or state law or a county ordinance exempts you. Contact the Department of Revenue to determine whether your business qualifies for an exemption.

Business Occupancy License: $250

In addition to the general business license, the Cook County Department of Building and Zoning requires a Business Occupancy License for most commercial operations. This license confirms that your business premises comply with zoning regulations and building safety standards.

Fee

The Business Occupancy License costs $250. This is a separate fee from the general business license and is in addition to any other permits or registrations you need.

What It Covers

The occupancy license verifies that the building or property where you operate is zoned for your type of business and meets Cook County building and safety codes. Whether you operate a retail store, office, service shop, or other commercial business, you need this license before you open.

How to Apply

Submit your application to the Cook County Department of Building and Zoning. You will typically need to provide a description of your business, your business address, details about the property or building, and proof of property ownership or a lease agreement. The department may inspect the premises to confirm compliance before issuing the license.

Home-Based Businesses: Free Affidavit

If you operate a home-based business in unincorporated Cook County, you do not pay the $250 occupancy fee. Instead, you file a Home Based Business Occupancy Affidavit with Cook County Building and Zoning. This affidavit is free.

What Qualifies as Home-Based

A home-based business is one where you conduct business operations from your residence. This includes consulting, freelance work, online businesses, professional services, and similar operations that do not involve significant client or customer foot traffic.

Filing the Affidavit

You still need the $40 General Business License from the Department of Revenue. However, instead of paying the $250 occupancy fee, file the free Home Based Business Occupancy Affidavit with Building and Zoning. This form acknowledges that your business operates from a residential property and complies with residential zoning limits.

Note that Cook County and individual homeowners associations may place restrictions on home-based business operations. Check your deed and homeowners association rules before starting a business from your home.

Contractor Registration: $150 Initial, $75 Annual

If you operate a construction or contracting business in unincorporated Cook County, you must register with the county in addition to obtaining your general business license and occupancy license.

Registration Fee

Contractor registration costs $150 per trade when you first register. After the initial registration, you pay an annual renewal fee of $75 per trade, due on December 31 each year. If you work in multiple trades (for example, electrical and plumbing), you register and pay for each trade separately.

What You Need

When registering as a contractor, be prepared to provide your business license number, proof of workers compensation insurance (if required for your trade), bonding information if applicable, and details about the trades you perform.

Illinois law also requires many contractors to hold a state license issued by the Illinois Department of Financial and Professional Regulation. This is separate from Cook County registration. Confirm your state licensing requirements based on your specific trade.

Food Permits and Cook County Health Department

If you operate a food business, food cart, food truck, restaurant, bakery, or any other food service operation in unincorporated Cook County, you need a food permit from the Cook County Department of Public Health (CCDPH).

CCDPH Service Area

The Cook County Department of Public Health is the health department for suburban Cook County except Chicago, Evanston, Skokie, Oak Park and Stickney Township, which have their own health departments. CCDPH issues retail food permits only in unincorporated Cook County; suburban cities and villages issue their own food permits.

Food Permit Requirements

Food businesses must pass a health inspection before receiving a food permit. The inspection covers food storage, preparation areas, equipment, sanitation, employee practices, and compliance with food safety regulations. CCDPH requires food service operations to follow state and federal food safety standards.

How to Apply

Contact the Cook County Department of Public Health to request a food permit application. Submit the completed application along with your business information, floor plans of your food service area, and details about the types of food you will prepare or serve. A health department inspector will visit your premises to conduct the inspection. Once you pass, CCDPH issues your food permit.

Permit Renewal

Food permits must be renewed regularly, typically annually. Keep your permit current and displayed at your business location as required by law.

Assumed Business Name: $50 Registration and Publication

If you operate under a business name different from your personal name (doing business as or DBA), you must register that assumed business name with the Cook County Clerk.

Filing Fee

The Cook County Clerk charges $50 to file an assumed business name. This registration is separate from your Illinois Secretary of State filings if you form an LLC or corporation.

Publication Requirement

After filing with the Cook County Clerk, you must publish notice of your assumed name in a newspaper of general circulation in Cook County. The notice must run once a week for three consecutive weeks. Publication must begin within 15 days of filing with the county clerk. You will receive a publication proof from the newspaper, which documents that you have met this requirement.

Timeline and Process

File your assumed name application, then arrange for publication in a Cook County newspaper. The three-week publication period gives you time to meet the legal requirement. Keep copies of the publication proof for your records.

Liquor and Video Gaming Licenses

If your business serves alcohol or operates video gaming machines, Cook County issues separate licenses for these activities. Both require applications to Cook County government and approval before you can legally serve alcohol or operate gaming devices on your premises.

Liquor License

Cook County issues liquor licenses for bars, restaurants, grocery stores, and other businesses selling alcoholic beverages. The process includes background checks, zoning verification, and community notification. Fees and approval timelines vary depending on the type of license and your specific location.

Video Gaming License

Video gaming terminals are licensed by the Illinois Gaming Board, and Cook County also issues its own video gaming license in unincorporated areas. If you want to operate video gaming equipment at your business (typically in bars or restaurants), you must obtain a video gaming license from the county. Again, fees and requirements depend on your location and the number of machines you plan to operate.

Contact Cook County Government

For details on liquor and video gaming licenses, contact the Cook County Department of Revenue or the appropriate Cook County licensing office. They will explain the requirements, fees, and application process for your specific situation.

Employment Requirements: Minimum Wage and Paid Leave

If you hire employees to work in unincorporated Cook County, you must comply with Cook County employment regulations in addition to state and federal law.

Minimum Wage

As of July 1, 2026, the Cook County minimum wage is $15.40 per hour for non-tipped employees and $9.25 per hour for employees who receive tips. These rates apply in unincorporated Cook County and in suburban towns that have not opted out of the county ordinance. Ensure your payroll practices reflect the current Cook County minimum wage.

Paid Leave Ordinance

Cook County's Paid Leave Ordinance covers employers in unincorporated Cook County and in towns that have not opted out of it. Check with Cook County government to determine the paid leave rules that apply to your business and location.

Key Takeaways and Next Steps

Operating a business in unincorporated Cook County requires multiple licenses and registrations. Here is a summary of what you typically need:

• General Business License from Cook County Department of Revenue: $40 for two years
• Business Occupancy License from Building and Zoning: $250 (or free Home Based Business Affidavit if home-based)
• Contractor Registration (if applicable): $150 initial plus $75 annual per trade
• Food Permit from CCDPH (if applicable): fees vary, inspection required
• Assumed Business Name registration: $50 plus publication costs
• Liquor or video gaming licenses (if applicable): fees and process vary
• Compliance with Cook County minimum wage ($15.40) and paid leave ordinance

Start by contacting the Cook County Department of Revenue to file your General Business License. Then work with Building and Zoning for your occupancy license. If you have employees or operate a food business, address those requirements as well. Keep all licenses current and displayed as required.

Important Disclaimer

This guide is informational and explains Cook County business licensing requirements for unincorporated areas as of 2026. It is not legal or tax advice. Business licensing rules can change, and specific requirements depend on your business type, location, and operations. Before opening your business, consult with an Illinois business attorney and a CPA familiar with Cook County requirements. They can confirm the licenses you need, help you file correctly, and ensure you comply with all applicable laws.

For authoritative information on Cook County business licensing, contact the Cook County Department of Revenue directly or visit the Cook County government website. The specific offices and contacts are the final authority on what your business needs.