For roof replacement in Chicago on a bungalow with a pitched shingle roof, the rules turn on three things: how many layers are already up there, whether any part of the roof is low-slope, and who does the work. Get those three right and the job is straightforward. Get them wrong and you can end up with a failed inspection or a roof the next buyer's inspector flags.
This article covers the shingle roof on a typical Chicago bungalow. If you have a flat roof, see finding and fixing a flat roof leak and the repair or replace breakdown instead.
Does a bungalow roof replacement need a permit in Chicago?
It can go either way, so confirm with the Department of Buildings before you sign anything. Here is what the City's own guidance says.
On residential buildings up to four stories, roof repair, recover or replacement is on the no-permit list when the roof pitch is at least 2:12. Structural repair is not, and neither is any low-slope work. That is the rule for a roof with a real pitch.
The City also runs reroofing through its Express Permit Program. Under the Express reroofing rules, eligible work includes roof repair limited to 25 percent of the roof area, a recover over one existing layer, and a replacement with no structural work. Not eligible: a building with an unpermitted rooftop feature such as an unpermitted roof deck, work that does not meet the Building Code, and work that does not meet the Energy Transformation Code insulation minimums. Those are the reroofing code citations DOB lists.
So the practical question for a bungalow is: is the whole roof at least 2:12, and is there any flat or low-slope section? Many bungalows have a dormer, a rear addition or a porch roof that is much flatter than the main roof. The City says any work on low-slope roofs needs a permit, even on a small residential building. Check each section, not just the main roof. Permit rules change often, so treat this as a starting point and confirm on the City's site.
Even when a job is exempt from a permit, work done under the exemption must still comply with the construction codes. And licensing rules apply on their own track. See below.
How many layers can a Chicago roof have?
We cannot give you a number, because the verified rule we can cite is narrower than that. What the City's Express page says is that a recover over one existing layer is eligible for Express reroofing, and that adding a layer over two or more existing layers requires drawings from an Illinois architect or structural engineer.
Whether the Building Code sets an absolute cap on layers is not something we have confirmed, so we do not state one. Ask the Department of Buildings or your roofer for the current rule on your building.
What matters more in practice is the roof itself. If you do not know how many layers are on your bungalow, find out before you get quotes. A roofer who opens a corner, or who looks at the edge at the eave, can tell you. It changes the scope.
Tear off or go over the old shingles?
A recover (going over) is the cheaper path on paper. A tear-off exposes the deck so you can see what is under the shingles. In practice the choice comes down to what you find:
| Factor | Why it matters |
|---|---|
| Number of existing layers | A recover is eligible for Express over one existing layer. More layers means drawings. |
| Condition of the deck | You cannot inspect a deck you cannot see. Soft or stained decking has to be replaced either way. |
| Weight and moisture | Extra layers add load and can hide moisture problems under them. |
| Your plans | If you will sell, refinance or insure soon, a tear-off gives a cleaner record. |
We cover this decision in can you roof over old shingles in Chicago. The short answer: a recover is sometimes allowed, but it is not always the right call, and it is never a way to skip finding out what is wrong underneath.
On older bungalows we often find the roof has been done before, sometimes more than once, and that the damage is concentrated where the roof meets something else: chimneys, valleys, dormers, vent stacks and the rear addition. The field of shingles can look fine while the flashing around them has failed. A quote that covers only the shingles and not the flashing at those points is leaving the likely leak untouched.
Who is allowed to replace a roof in Chicago?
Two licenses are involved, and people mix them up.
The Illinois roofing license. Under state law, roofing work may be done only by a licensed roofing contractor. Roofing contractors may subcontract only to other licensed roofing contractors. There are exceptions, including roofing work on a person's own property, or work done for no consideration, and a permit issuer must confirm the contractor is licensed before issuing a permit. Under the City's Express rules, a person without a valid Illinois roofing contractor license is not eligible to do the work under that permit.
The Chicago general contractor license. The reroofing permit also requires a Chicago-licensed general contractor unless the owner qualifies as owner-contractor, and the general contractor or the roofing subcontractor must hold the Illinois roofing license.
Before you sign: ask to see the Illinois roofing license, ask who pulls the permit if one applies, and ask for the answer in writing. A contractor who says "you do not need any of that" is telling you something about how they run jobs.
What should be in a bungalow roof replacement scope?
A quote tells you a lot by what it names. Look for each of these in writing:
- Tear-off or recover, and how many layers will be removed
- Deck repair: how bad decking will be handled and priced
- Underlayment and ice and water protection at the places they are used, per the manufacturer
- Flashing: chimneys, valleys, dormers, walls and vent stacks, replaced or reused
- Ventilation: intake and exhaust, not just the shingles
- Insulation, where the work triggers the City's insulation minimums for the roof
- Cleanup, disposal and protection of the landscaping and gutters
- Permit: who pulls it, or why none applies
Cost drivers are the roof's size and complexity (hips, valleys, dormers), the number of layers, the condition of the deck, how many penetrations and details there are, access, and the materials you choose. We do not quote prices in articles. We quote after we look at the roof.
When is the best time to replace a Chicago roof?
Shingles can go on in a wide window, but the best time is when the roof is dry and you are not racing a leak. Waiting for an emergency makes you take whatever schedule you can get. Our note on the best time to replace a roof in Chicago covers the tradeoffs.
Questions to ask before you hire
- Do you hold an Illinois roofing license, and what is the number?
- How many layers do I have, and how do you know?
- Is any part of my roof low-slope, and who handles the permit if it is?
- What happens to the flashing at the chimney, dormers and walls?
- What will you do if you find rotten decking?
- How is cleanup handled?
Akats handles roofing in Chicago as part of one in-house team, including the masonry at chimneys and parapets when the roof work uncovers it. Our Chicago roofing guide lays out the whole picture. For the permit rules specifically, see what a Chicago roof permit covers. Ready for a look at the roof? Call 312-339-9627.
Common questions
The City lists roof replacement on pitched roofs of at least 2:12 as no-permit on residential buildings up to four stories, but any low-slope section needs a permit. Bungalows often have a flatter dormer or rear roof, so check each section with the Department of Buildings.
Sometimes. The City's Express page covers a recover over one existing layer. Adding a layer over two or more existing layers requires drawings from an Illinois architect or structural engineer. Whether that is the right call depends on the deck. See roofing over old shingles.
Yes. Illinois law says roofing work may be done only by a licensed roofing contractor, with exceptions such as work on your own property. Ask to see the license before you sign, and check that the contractor is also set up correctly for the City's permit rules.
When the roof can be worked on dry and you are not up against an active leak. We lay out the tradeoffs in the best time to replace a Chicago roof. A planned job usually goes better than an emergency one.
Sources
- City of Chicago: Express Permit Program: Reroofing
- City of Chicago: Guide to Building Permits: What Types of Work Do Not Require a Building Permit?
- Illinois General Assembly: Roofing Industry Licensing Act, 225 ILCS 335/9
- Illinois General Assembly: Roofing Industry Licensing Act, 225 ILCS 335/11
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.