Will County, IL Building Permits: Review Times and Permit Guide
Will County, IL building permits: Plan review takes 10 to 30 days depending on project type and complexity. The Will County Building Department issues permits for unincorporated areas. Cities within the county handle their own permitting.
Home to 696,355 residents, Will County, IL covers 6 cities and communities including the county seat of Joliet. Building permit review at the county level typically takes 10 to 30 days for initial plan check. Below you will find links to city-specific permit guides along with county-level permit information for unincorporated areas.
Will County Building Department
Will County Building Department
- Website: willcounty.gov/County-Offices/Economic-Development/Will-County-Land-Use-Department/Development-Services-Division/Building
- Contact: 815-727-8634
- Online Portal: co-will-il.smartgovcommunity.com
- Building Code: International Building Code (IBC) 2021 with IL amendments
Cities in Will County, IL
Will County contains 6 major cities and communities. Permit Place has detailed permit guides for 1 of these cities. Each city operates its own building department and issues permits for projects within city limits.
Joliet, IL
City permit info
Plainfield, IL
City permit info
Romeoville, IL
City permit info
Bolingbrook, IL
City permit info
New Lenox, IL
City permit info
Lockport, IL
City permit info
Crest Hill, IL
Projects in unincorporated Will County (outside any city limits) require permits from the Will County Building Department.
County vs. City Permits: When to Contact Will County
Will County, IL has both incorporated cities and unincorporated areas. Knowing which jurisdiction covers your project site is the first step in the permit process.
Contact Will County Building Department When:
- Your project is in unincorporated Will County (outside any city limits)
- You are unsure whether your address falls within a city or the county
- Your project spans both city and county jurisdictions
Contact the City Building Department When:
- Your project is within the city limits of Joliet, Plainfield, Romeoville, or another incorporated city
- You have confirmed your address falls within city jurisdiction
If you are unsure about your property’s jurisdiction, the Will County building department can help you verify. A permit expediter like Permit Place can also determine the correct jurisdiction for your project.
Permit Types Available in Will County
Will County issues several categories of building permits for projects in unincorporated areas.
Building Permits
- New commercial construction: full plan review required across all building disciplines
- Tenant improvements and interior buildouts: required for structural, electrical, plumbing, or HVAC changes
- Additions and renovations: any work that changes the building footprint or structure
- Change of use: required when converting a building from one use category to another
Trade Permits
- Electrical: new wiring, panel upgrades, and electrical service changes
- Plumbing: new fixtures, piping, and water heater installations
- Mechanical (HVAC): heating, cooling, and ventilation system work
- Fire protection: sprinkler systems and fire alarm installations
Will County Building Permit Costs
Permit fees in Will County are based on project valuation and type. Below are typical ranges for common project categories.
Commercial Projects
- Tenant improvements: $500 to $5,000+
- New commercial construction: $2,000 to $25,000+ (based on valuation)
- Plan review fee: typically 50-65% of the building permit fee
Trade Permits
- Electrical: $50 to $500
- Plumbing: $50 to $500
- Mechanical: $50 to $500
Fee ranges are estimates. Actual fees depend on project valuation and scope. Contact the Will County building department or Permit Place for exact costs.
Frequently Asked Questions About Will County Building Permits
How long does it take to get a building permit in Will County?
Plan review in Will County, IL takes 10 to 30 days for the initial review cycle. Projects that receive correction comments will require additional review cycles. Commercial projects often go through two or three review rounds before final approval.
What is the difference between a Will County permit and a city permit?
Will County issues building permits for projects in unincorporated areas outside city limits. If your project is within an incorporated city like Joliet, you need a permit from that city’s building department instead. Confirming your exact jurisdiction before applying will save time and prevent delays.
Do I need a Will County building permit or a Joliet permit?
That depends on your project location. Properties inside Joliet city limits require permits from the City of Joliet. Properties in unincorporated Will County require permits from the county building department. Check your property’s address with the county to confirm jurisdiction.
What building permits does Will County require?
Will County requires permits for new construction, additions, renovations, electrical work, plumbing, mechanical systems, and roofing. Commercial projects also need separate trade permits. Minor repairs and cosmetic changes like painting or flooring typically do not require a permit.
How much does a building permit cost in Will County?
Permit fees in Will County are calculated based on project valuation and type. Commercial permit fees typically range from $500 to $25,000 or more. Plan review fees are usually 50% to 65% of the building permit fee. Contact the Will County building department for exact fee schedules.
Can I get a building permit online in Will County?
Yes. Will County offers an online permitting portal where you can submit applications, upload plans, and check permit status. Some permit types still require in-person visits. Visit the county’s online portal or contact the building department for details on which permits can be processed electronically.
Can a permit expediter help with my Will County project?
Yes. Permit Place expedites building permits in Will County and across Illinois. We handle application preparation, plan review management, corrections, and final permit issuance. Our clients typically get permits faster because we submit complete, code-compliant applications on the first attempt.
Need Help With Will County Building Permits?
Permit Place has helped hundreds of businesses get permits in Will County and across Illinois. We handle everything from application to approval so you can focus on building.
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