Do I need a permit for window or exterior door replacement in Chicago?
It depends. Whether window or exterior door replacement needs a permit in Chicago comes down to the details of your project.
Illinois publishes no statewide list of work exempt from a residential building permit. Most Illinois jurisdictions treat a like-for-like window or door replacement in the same opening as exempt, while enlarging or adding an opening triggers a permit and structural (header) review. Confirm the local rule before you order units. Many local codes require bedroom windows to meet emergency escape and rescue (egress) sizing when they are replaced, under whichever residential code edition the jurisdiction has adopted. In-kind replacement of a window or exterior door in the existing opening in a residential building up to 4 stories needs no permit. A permit IS required for creating a new opening, replacing fire-rated glass, replacing a window within 10 feet of a fire escape, or non-like-for-like changes. New or replacement windows and doors must meet the 2022 Chicago Energy Transformation Code, and replacement windows may require window opening control devices under the Chicago Building Rehabilitation Code. A licensed general contractor (Class A-E) is normally required unless the owner acts as general contractor for their own primary residence. Enlarging an opening, moving it, or cutting a new one is structural work. Exemptions that cover replacing a unit in its existing opening do not reach it, so a permit is required. Changing an opening usually means a new or resized header, and many jurisdictions want a beam detail or engineering before they will issue, so allow for that in the schedule.
Documents you may need
- Product/spec sheet showing size and energy performanceSometimes required
- Description of whether the opening is being enlargedLikely required
- Contractor informationSometimes required
- Express Permit Program application (Exterior Window or Door Replacement)Sometimes required
- Energy and water efficiency compliance formSometimes required
- At least one existing-condition photographSometimes required
- Illinois-licensed architect or structural engineer drawings (only for buildings taller than 7 stories)Sometimes required
- Condominium association approval letter (if a condo)Sometimes required
Possible inspections
- Final inspection
- Final inspection by a Department of Buildings inspector for permitted window/door work
- Framing inspection for the altered opening
Frequently asked questions
- Do I need a permit for window or exterior door replacement in Chicago?
- It depends. Whether window or exterior door replacement needs a permit in Chicago comes down to the details of your project. Illinois publishes no statewide list of work exempt from a residential building permit. Most Illinois jurisdictions treat a like-for-like window or door replacement in the same opening as exempt, while enlarging or adding an opening triggers a permit and structural (header) review. Confirm the local rule before you order units. Many local codes require bedroom windows to meet emergency escape and rescue (egress) sizing when they are replaced, under whichever residential code edition the jurisdiction has adopted. In-kind replacement of a window or exterior door in the existing opening in a residential building up to 4 stories needs no permit. A permit IS required for creating a new opening, replacing fire-rated glass, replacing a window within 10 feet of a fire escape, or non-like-for-like changes. New or replacement windows and doors must meet the 2022 Chicago Energy Transformation Code, and replacement windows may require window opening control devices under the Chicago Building Rehabilitation Code. A licensed general contractor (Class A-E) is normally required unless the owner acts as general contractor for their own primary residence. Enlarging an opening, moving it, or cutting a new one is structural work. Exemptions that cover replacing a unit in its existing opening do not reach it, so a permit is required. Changing an opening usually means a new or resized header, and many jurisdictions want a beam detail or engineering before they will issue, so allow for that in the schedule.
- Who issues the permit in Chicago?
- The local building department for Chicago handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.