City of Chicago Certificate of Occupancy: Application, Inspections, Penalties

A Chicago certificate of occupancy is the document the city’s Department of Buildings issues to confirm that a new or converted building has passed inspection and complies with the Chicago Construction Codes. Most residential buildings with four or more units and larger commercial buildings cannot legally be used until the certificate is in hand, and the city can order a building vacated if people move in first.¹

When You Need a Certificate

Section 14A-7-702.1 of the Chicago Construction Codes prohibits using or occupying any building until the building official has issued a certificate of occupancy. The same rule applies to a change of occupancy in an existing building. Converting a warehouse into apartments or an office into a restaurant cannot proceed until a new certificate reflects that the space meets the safety standards for its new classification.²

A change of occupancy is not only about physical renovation. If a building’s legal use classification differs from how someone intends to use it, the certificate requirement applies even without construction.

Projects That Are Exempt

Three situations do not require a certificate:

Group R-5 or U buildings, which include single-family homes and most detached accessory structures like garages and sheds. These go through a final inspection instead. Owners of single-family homes can request a certificate voluntarily, but the request has to be submitted online and approved before construction begins.¹
Work that is exempt from building permits in the first place, such as minor repairs and maintenance.
Rehabilitation affecting 10,000 square feet or less of gross floor area, provided the work does not change the building’s occupancy classification.²

The 10,000-square-foot exemption catches people off guard. A property owner can renovate a significant portion of a commercial space without a new certificate, but the moment the intended use changes even slightly, the exemption disappears and the full certificate process applies.

How to Apply

The process has two stages: an online request, followed by city-scheduled inspections.

Submitting the Request

As construction nears completion, submit the online Certificate of Occupancy Application through the Department of Buildings website.¹ Have the following ready:

The building permit number tied to the construction project.
The property address exactly as it appears on the original permit application.
The occupancy classification from the approved plans, such as R-2 for apartment buildings with more than three dwelling units or A-2 for restaurants and similar assembly spaces.³
The scope of the request, meaning which portions of the building and which floor levels the certificate should cover.

The certificate application is separate from E-Plan. Chicago’s Dynamic Portal and ProjectDox platform handle permit applications and plan submissions for licensed design professionals;⁴ the certificate of occupancy request uses its own dedicated form.

Inspections and Final Review

Once the application is in, the Department of Buildings contacts the applicant to schedule the certificate-related inspections. Projects that require fire department review are referred to the Chicago Fire Department’s Fire Prevention Bureau, which the applicant must coordinate with separately.¹

Inspections cover electrical, plumbing, mechanical ventilation, structural elements, and fire safety. Each trade sign-off must be in place before the building official conducts the final review. A missing sign-off from a single trade will stall everything, so it’s worth confirming that every subcontractor has closed out their portion of the permit before you submit.

The building official’s final inspection verifies that the finished space matches the approved plans and that no code violations exist. If everything checks out, the certificate is issued.²

What You Receive and What to Do With It

Under Section 14A-7-702.2, the certificate lists the permit number, the building address, the owner’s name and address, the portion of the building covered, a compliance statement, and the name of the building official who issued it.²

Before anyone moves in, the owner has to pay all outstanding inspection fees and pick up the hard copy.¹ Keep a copy on file permanently. You’ll need it for insurance purposes and future property transactions.

Temporary Certificates of Occupancy

When a building is safe to occupy but some non-critical work is still unfinished, the building official can issue a temporary certificate of occupancy (TCO). This comes up often in large multi-unit projects where tenants have signed leases but minor finishes or exterior work are still in progress.

The building official has discretion to issue a TCO “for such time and under such conditions as the building official determines appropriate and consistent with the standards of public safety and welfare.” For residential projects, the code specifically authorizes a TCO for any portion of a building with more than three dwelling units, as long as that portion is completely separated from the unfinished areas by fire-rated construction and all required means of egress are in place.²

In practice, core life-safety systems have to be fully operational before a TCO is granted. Expect the fire suppression system, fire alarm, smoke and carbon monoxide detectors, emergency egress lighting, and adequate heating and ventilation to be working and inspected.

The code does not set a fixed duration. The building official decides the appropriate timeframe case by case, along with any conditions the owner must meet.⁵ If the remaining work is not finished before the TCO expires, the owner has to apply again and pass another inspection. TCO fees are separate from standard permit fees, and the building official sets them by rule; the amounts are not published in the construction code itself, so contact the Department of Buildings directly for current figures.²

What Happens If You Occupy Without One

Moving into a building that requires a certificate of occupancy before one has been issued is illegal under Chicago law.¹ The consequences go beyond fines.

Under Section 14A-7-702.6, the building official can notify the owner and all occupants that the building must be vacated. Once a vacate order is issued, no one can re-enter until the building passes inspection and a proper certificate is issued.² For a landlord who has already placed tenants, that means emergency relocations and potential lease liability.

Even after a certificate is issued, the building official can suspend or revoke it if it was issued in error or based on incorrect information, or if conditions in the building change so that it no longer conforms to code.²

The city imposes per-day fines for building code violations, and each day of illegal occupancy counts as a separate offense.⁶ The practical fallout can be worse. Property insurance policies often exclude losses tied to work that was never properly permitted or approved, which means a fire in an illegally occupied building could lead to a denied or reduced claim. Unpermitted occupancy that results in injury also creates serious personal liability for the owner.

Common Reasons Certificates Get Held Up

The certificate stage is where months of construction bottleneck into a single administrative checkpoint. A few recurring problems cause most delays:

Outstanding trade sign-offs. Every sub-permit (electrical, plumbing, mechanical) needs its own closeout before the building official will schedule the final. Track these actively rather than assuming subcontractors handled them.
Plans that no longer match the building. If the finished space deviates from the approved drawings in ways that seem minor, like relocated outlets or shifted partition walls, the inspector will flag it. Significant deviations may require a plan revision before the certificate can issue.
Fire department scheduling. The Fire Prevention Bureau runs its review separately from the Department of Buildings, and its calendar is not coordinated with yours. Schedule early.
Unpaid fees. All outstanding inspection fees must be paid before the certificate is released. A reinspection fee is also charged whenever a scheduled inspection cannot proceed because of something on the owner’s or permit holder’s side.¹

If a lease commencement date is approaching and a full certificate is not realistic, applying early for a TCO gives you a fallback, but only if the life-safety systems are complete and the occupied portion is properly separated from the unfinished areas.

1
City of Chicago. Certificates of Occupancy
2
ICC Digital Codes. 2019 Chicago Construction Codes Administrative Provisions – Chapter 14A-7 Occupancy
3
American Legal Publishing. Municipal Code of Chicago 14B-3-310 – Residential Group R
4
City of Chicago. E-Plan: Chicago’s Online Building Permit Platform
5
American Legal Publishing. Municipal Code of Chicago 14A-7-702.3 – Temporary Occupancy
6
American Legal Publishing. Municipal Code of Chicago 13-11-090 – Violation – Penalties – Liability