Chicago permit violations almost always begin the same way: someone starts work that needed a permit, and someone else notices. A neighbor calls 311, an inspector passes the site, or a sale or a later permit application brings the old work to light. Then the City can post a stop work order, charge more for the permit, and open an enforcement case. It is fixable. It costs more the longer you wait.
How does unpermitted work get found?
Usually by a phone call, not a sweep. The City's 311 line is the intake for problem buildings, and construction without a permit is one of the request types. Inspections of occupied buildings are largely complaint-driven: DOB supervisors review the 311 complaints each business morning and decide which ones need an inspector right away.
Common ways it surfaces:
- A neighbor sees a dumpster, scaffolding or a crew and calls 311.
- An inspector is on the block for another complaint and walks by.
- The owner applies for a permit later and the record shows the earlier work.
- A buyer, lender or insurer asks for the permit history during a sale.
None of these needs the owner to have done anything wrong on purpose. Plenty of owners hire a crew that says "we don't need a permit for this," and find out otherwise from an inspector.
What does Chicago require a permit for?
The basic rule is that a building permit is required before beginning most construction, demolition, rehabilitation and repair work. A limited list of work is exempt: some site work, nonstructural repairs, minor alterations and unoccupied structures. Exempt work still has to meet every construction code.
The exemptions are narrower than people assume. Repair skips the permit only if it does not cut away part of an exterior wall, interior wall, subfloor or roof, does not remove structural supports, and does not change required exits. On residential buildings up to four stories, the City also exempts in-kind replacement of up to 50 square feet of masonry, along with a few other small jobs. If you are not sure whether your job fits, our guide to work that needs no permit goes through the list, and the permit guide explains the programs.
Even work that needs no permit is covered by Chicago's general contractor license rule. An unlicensed crew is a second problem on top of the first.
What can the City do when it finds work without a permit?
The City's own answer to this question is specific. According to the City's building permit FAQ (City of Chicago):
- A City employee issues a stop work order and posts it on the site.
- Work can resume only after the required permit is obtained and the stop-work penalty is paid.
- In most cases the permit fee is tripled.
- The City may open an enforcement case or lawsuit.
- The owner may have to correct or remove the work at their own expense.
Fines and fee amounts change. Check the current figures with the Department of Buildings before you plan around any number.
There is more beyond a single job. The City can also suspend a person's ability to submit new permit applications for repeated unpermitted work or for ignoring stop work orders. That matters if your contractor files permits for a living: a suspended filer can't help you get legal again. We cover the order itself in what a Chicago stop work order means.
A stop work order doesn't go away. Work stays stopped, the enforcement case stays open, and a case that goes unanswered can end in a default judgment, which the City can use to place a lien on the property (City of Chicago). Keep working under a posted order and you add a second violation. The cost of waiting is the permit at a higher fee, plus the enforcement case, plus whatever you have to open up and redo.
What the warning signs look like
Watch for these before an inspector does:
- Your contractor says the work "doesn't need a permit" and can't tell you why, or won't put it in writing.
- No permit number, and no permit posted at the site.
- The crew wants cash and has no license number to show.
- The scope includes cutting into a wall, a roof deck, a floor, or a structural support.
- The work goes beyond what the original permit covered.
- A neighbor or a City employee has already stopped to ask about it.
On Chicago two-flats and three-flats, a common pattern is a back porch rebuilt, a basement finished or a roof opened up by a crew that never pulled a permit. The work looks fine for years. It comes to light when the owner tries to sell, refinance, or pull a permit for something unrelated. Fixing it then costs more than permitting it first would have.
How do you get legal again?
The way back is a process, and the order matters.
- Stop work. If there is a posted order, do not keep working. Work resumes only after the permit and penalty requirements are met (City of Chicago).
- Find out what you have. Search the address on the City's records to see what is open (violation lookup).
- Get the work looked at. Someone who builds should walk it and say what is code-compliant, what needs to be opened up and what must be redone.
- Apply for the right permit. The program depends on the scope: Express for most repair work, plan review where drawings are required. Our article on getting a permit after the work is done covers the options.
- Be ready to correct. The City can require you to correct or remove unpermitted work at your own expense, which sometimes means opening walls for inspection.
- Keep the record. Photos, the permit, inspection sign-offs. They are your proof.
If an emergency forced you to act first, Chicago has a rule for that. Emergency work that normally needs a permit may be done first to prevent imminent harm, but a permit application must be submitted the next business day, and the work may not be concealed without inspector approval. That is an exception for real emergencies, not a workaround.
Get it permitted properly
Akats handles the permit paperwork and the repair together, and we work in English and Spanish. If a stop work order is posted or you suspect past work was never permitted, see our permit and expediting service or call 312-497-5751. Bring what you have, and we will tell you where you stand.
Common questions
A City employee can post a stop work order. Work resumes only after the required permit is obtained and the stop-work penalty is paid, the permit fee is tripled in most cases, and the City may start an enforcement case or lawsuit. You may also have to correct or remove the work.
The City's permit FAQ says the owner may have to correct or remove unpermitted work at their own expense. What that means for your job depends on what was built and what inspectors find, so check with the Department of Buildings.
Mostly through 311 complaints, since inspections of occupied buildings are largely complaint-driven. It can also surface when an owner applies for a later permit, or when a buyer or lender asks for permit history.
Usually the route is to apply for the correct permit and satisfy any penalty and inspection requirements, which may mean opening up work. Read our article on getting a permit after work is done, and confirm the steps with the Department of Buildings.
Sources
- City of Chicago: Guide to Building Permits: What Happens If I Start Work Without a Required Permit?
- City of Chicago, Department of Buildings: Permit Professional Lookup: Help
- City of Chicago, Department of Buildings: Department of Buildings home page
- City of Chicago, Department of Buildings and Department of Law: Building Code Violation Enforcement Process (PDF)
- City of Chicago, Department of Administrative Hearings: What Happens After the Hearing?
- City of Chicago: Guide to Building Permits: What Types of Work Do Not Require a Building Permit?
- City of Chicago, Department of Buildings: General Contractor License
Facts last checked: October 7, 2026.
This article explains general rules and common situations in Chicago. It is not legal advice, and City rules change. For a specific property, check with the Chicago Department of Buildings or a licensed professional.