Sometimes. Chicago lets an owner act as their own contractor if the building is their primary residence, three stories or fewer with six or fewer units, for one property per calendar year. You then carry the responsibility for worker safety, inspections and code compliance. A structural porch rebuild still needs a permit and plans from an Illinois-licensed architect or structural engineer. Landlords and investors do not get the exception. Confirm with the Department of Buildings.
Is a Chicago porch DIY rebuild legal? Sometimes. The City has an owner exception, but it is narrow, and it moves the risk onto you rather than removing any rules.
Who can act as their own contractor?
An owner of a primary residence that is a single-family home or a multifamily building of three stories or fewer and six or fewer units, one property per calendar year, is an exception to the mason license rules (City mason license FAQ). The same limits apply to the general contractor license: it is not required for an individual doing work on their primary residence under those limits, except for excavation and demolition (City GC license FAQ).
Two things follow:
- You must live there. The City's Express Permit pages ask for the owner-as-contractor form (Form 401) plus a government ID showing you live at the property (City of Chicago).
- Investors and landlords do not qualify. A rental you do not live in is outside the exception. You would need a licensed contractor.
When you act as your own contractor, the City says you take on responsibility for worker safety, scheduling inspections and code compliance (DOB porch page). Be honest about whether you want to run that on a structure people stand on.
What the exception does not waive
The exception covers who pulls the permit. It does not cover what the permit requires.
- Plans. The Department of Buildings says a permit is always required to repair or replace structural porch elements such as columns, beams, foundations, stringers and floor joists, with plans by an Illinois-licensed architect or structural engineer (City porch safety page). You cannot draw those yourself. See do you need drawings to rebuild a porch.
- Inspections. The work has to be inspected. Doing it yourself does not skip that step.
- Code. The porch has to meet the same rules whether a pro or an owner built it.
What you can do without a permit is the small stuff: painting, power washing, and replacing non-structural pieces like deck boards, stair treads or railing pickets if you have no violation (City porch safety page). That is the honest DIY zone.
When is DIY a bad idea?
A porch is not a fence. A rear porch on a Chicago two-flat or three-flat carries people two and three stories up. If the job involves posts, beams, the connection to the building, footings or anything a violation notice mentions, bring in a licensed contractor and a design professional.
Skipping the permit is the worst move. If the City finds work without a required permit, it can post a stop work order, and in most cases the permit fee is tripled. It can also start an enforcement case, and you may have to correct or remove the work at your own cost (City of Chicago). Confirm the current details with the Department of Buildings.
Owners who start a porch themselves usually do fine on the deck boards and rails. Where it goes wrong is the structure underneath: a ledger fastened with the wrong hardware, a post set on an undersized footing, or a stair stringer cut too thin. By the time we see it, the fix often means taking apart some of the work.
If you are weighing it, read Chicago porch permits, and repair or replace a Chicago porch. Whoever you hire, check the license first with how to check a Chicago contractor license. Our porch crew can do the structural part and leave you the parts you want to do. The porch guide has the full picture.
Common questions
If the building is your primary residence, three stories or fewer with six or fewer units, you can act as your own contractor for one property per calendar year. The City asks for its owner-as-contractor form and a government ID showing you live there. Confirm current rules with the Department of Buildings.
The owner exception is tied to your primary residence, so a rental you do not live in is not covered. Use a licensed contractor, with plans from an Illinois-licensed architect or structural engineer if the work is structural.
Per the Department of Buildings, routine maintenance such as painting and power washing, and replacing non-structural pieces like deck boards, treads and pickets if you have no violation. Structural work always needs a permit.
Sources
- City of Chicago: Guide to Building Permits: General Contractor License FAQ
- City of Chicago: Guide to Building Permits: Mason Contractor License FAQ
- City of Chicago, Department of Buildings: Porch and Deck Safety
- City of Chicago: Guide to Building Permits: When Is a Licensed Architect or Engineer Required?
- City of Chicago: Guide to Building Permits: What Happens If I Start Work Without a Required Permit?
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.