Chicago, IL · Cook County
Building Permit Application Form (Form 400)
Property owners, authorized agents, and design professionals use this application to request a Chicago building permit for new construction, rehabilitation, or special construction work.
What this form is
Form 400 requests a Chicago building permit for new construction, building rehabilitation, or special construction. The application instructions identify which pages to complete for each type of work, and all applications must include pages 1, 5, 6-OA, and 6-DP. It asks for project details, work scope, property and zoning information, contractor details, and required certifications; additional pages may be needed depending on the project.
Who needs it
A property owner, authorized agent, or other permit applicant seeking approval for covered building work in Chicago uses this application with a design professional.
How to submit it
Enter matching information in the Dynamic Portal and upload the completed application as a single PDF to the “Permit Application” folder in ProjectDox. The application must be prepared by the licensed architect, engineer, or expediter whose account is used to upload it.
About notarization
This application is signed without a notary; it identifies no notarized or sworn attachment, so required signers provide signatures and dates.
How to submit this form
- 1
Download The Application
Download Form 400 and review the instructions to identify the pages required for your type of work.
- 2
Complete Required Pages
Fill in the applicable project, property, zoning, contractor, and certification sections; required pages include pages 1, 5, 6-OA, and 6-DP.
- 3
Gather Required Materials
Include applicable pages and supporting materials; for certain projects, the instructions require a house number certificate or a survey copy.
- 4
Upload The Application
Enter matching information in the Dynamic Portal and upload the completed application as a single PDF to the “Permit Application” folder in ProjectDox.
Frequently asked questions
- Who uses Chicago’s Building Permit Application Form 400?
- Permit applicants seeking approval for new construction, building rehabilitation, or special construction use Form 400. The application includes sections for project, property, contractor, and certification information.
- How do I submit the Chicago building permit application?
- Enter matching information in the Dynamic Portal, then upload the completed application as a single PDF to the “Permit Application” folder in ProjectDox using the account of the licensed preparer.
- Do I need a notary for Chicago’s Building Permit Application?
- No. This application is signed without a notary and identifies no notarized or sworn attachment; required signers provide signatures and dates.
Need something notarized?
This Building Permit Application Form (Form 400) doesn’t need a notary — but Illinois residents can notarize other documents online with a commissioned online notary.