When You Need a Permit in Chicago
The City of Chicago requires building permits for most construction, alteration, and demolition work. The threshold is lower than many homeowners expect. As a general rule, if the work involves structural changes, changes to the building envelope, electrical wiring, plumbing, or HVAC systems, you need a permit.
Projects That Require a Permit
- Building a new deck or porch (almost always requires a permit, with structural plans)
- Fences over 5 feet tall or in front yards
- Roof replacement or re-roofing
- Siding replacement (if changing material type or altering sheathing)
- Room additions or dormers
- Finishing a basement or attic as habitable space
- New or relocated plumbing fixtures
- Electrical panel upgrades or new circuits
- Window or door changes that alter the size or location of an opening
- HVAC system replacement or new ductwork
- Garage construction or conversion
- Demolition of any structure
- Installing a driveway or modifying curb cuts
Projects That Generally Do Not Require a Permit
- Interior painting, wallpapering, and cosmetic finishes
- Replacing cabinets and countertops (without moving plumbing)
- Replacing flooring
- Like-for-like window replacement (same size, same opening)
- Minor landscaping and planting
- Low fences under 5 feet in side or rear yards
- Minor repairs that do not change the structure or use of the space
Note: Even when a permit is not required, the work must still comply with all applicable building and zoning codes. When in doubt, call the Chicago Department of Buildings at 312-744-3449.
Types of Building Permits in Chicago
Easy Permit Process
The Easy Permit is Chicago's streamlined process for routine residential work that does not involve structural changes. Eligible projects include residential electrical, plumbing, and HVAC work in buildings of 3 stories or fewer. Easy Permits are typically reviewed and issued quickly, often within 1-3 business days, and do not require architectural drawings. However, the work must still be inspected before it is concealed.
Standard Building Permit
Standard permits are required for work that involves structural modifications, changes to the building envelope, new construction, additions, and most renovation work beyond cosmetic upgrades. Standard permits require a complete application including architectural plans, structural calculations (where applicable), a plat of survey, and contractor information. Plan review is performed by the Department of Buildings and can take 2-6 weeks for straightforward residential projects.
Self-Certification Program
For projects designed by licensed architects and structural engineers, Chicago offers a Self-Certification Program that can significantly speed up plan review. Under this program, a registered design professional certifies that the plans comply with all applicable codes, and the Department of Buildings issues the permit based on that certification. This is commonly used for commercial projects and large residential renovations where a full design team is already involved.
Permit Requirements by Project Type
Deck Construction
Always requires a permit. You will need a site plan, structural framing plan, and footing details. Chicago requires footings to extend 42 inches below grade (below frost line). Your contractor must be licensed and insured. See our complete Chicago Deck Guide for detailed code requirements.
Fence Installation
Permits are required for fences over 5 feet tall, front-yard fences, and masonry fences. Even when no permit is needed, you must comply with height limits (4 feet in front yards, 6 feet in side and rear yards) and setback requirements. Review our Chicago Fence Guide for complete regulations.
Roof Replacement
Requires a permit, even for like-for-like replacement. If adding a layer of shingles over existing, you are limited to a maximum of two layers total. If the existing roof has two layers, a full tear-off is required. The permit ensures fire rating, ice barrier, and ventilation requirements are met.
Siding Replacement
Generally requires a permit if you are changing the siding material (e.g., from wood to vinyl) or altering the wall assembly. Like-for-like siding repair on a small area may not require a permit, but check with DOB if the scope exceeds minor patching.
Additions & Major Renovations
Always requires a standard permit with full architectural plans. Additions also trigger a zoning review to ensure the expanded footprint complies with lot coverage, setback, and floor-area-ratio (FAR) limits. Depending on the scope, you may also need a separate excavation permit, a driveway permit, and trade permits for electrical, plumbing, and HVAC.
How to Apply for a Building Permit
Online Application
Most residential permits can be applied for online through the Chicago Department of Buildings' E-Plan system. The online portal allows you to submit applications, upload drawings, pay fees, and track the status of your review. This is the fastest method for most projects and avoids the need to visit City Hall in person. You will need a DOB account, which you can create on their website.
In-Person Application
For complex projects or if you prefer face-to-face assistance, you can apply in person at the Chicago Department of Buildings, located at 121 N. LaSalle Street, Room 906, Chicago, IL 60602. Bring two sets of plans, a completed application form, your plat of survey, and proof of contractor licensing and insurance. Arrive early -- wait times can be long, especially during the spring building season.
What You Will Need
- Completed permit application form
- Architectural plans (to scale, showing existing and proposed conditions)
- Structural engineering calculations (for decks, additions, structural modifications)
- Plat of survey (showing property lines, existing structures, and proposed work location)
- Contractor license number and insurance certificates
- Energy compliance documentation (for additions and major renovations)
- Asbestos survey (required for buildings constructed before 1981 undergoing renovation or demolition)
Permit Costs and Fees
Chicago permit fees are based on the type of work and the estimated project cost. While fees change periodically, the following ranges provide a general idea of what to expect:
| Project Type | Typical Fee Range |
|---|---|
| Easy Permit (electrical, plumbing, HVAC) | $75 - $250 |
| Fence Permit | $75 - $150 |
| Deck Permit | $200 - $500 |
| Roof Replacement Permit | $75 - $250 |
| Siding Permit | $75 - $200 |
| Basement Finish | $250 - $750 |
| Room Addition | $500 - $2,500+ |
| New Construction (single-family) | $2,000 - $10,000+ |
Fees shown are approximate and subject to change. Actual costs depend on project valuation, number of trade permits required, and any expediting fees. Check the DOB fee schedule for current rates.
The Inspection Process
Once your permit is issued and work begins, the Department of Buildings will require inspections at specific stages of construction. These inspections verify that the work matches the approved plans and complies with the building code. Failing to schedule required inspections -- or covering work before inspection -- can result in orders to demolish and rebuild at your expense.
Common Inspection Stages
- Foundation / Footing Inspection: Before pouring concrete for footings or foundations. Inspector verifies depth, dimensions, reinforcement, and soil conditions.
- Rough Framing Inspection: After framing is complete but before insulation and drywall. Verifies structural connections, fire blocking, proper nailing patterns, and header sizes.
- Rough Electrical / Plumbing / HVAC: After trade rough-in is complete but before walls are closed. Each trade may require a separate inspection.
- Insulation Inspection: Verifies type, thickness, and installation quality of insulation before drywall.
- Final Inspection: After all work is complete. Verifies finished conditions, safety devices (smoke detectors, GFCI outlets, railings), and overall code compliance.
Scheduling Inspections
Inspections are scheduled through the DOB online system or by calling 312-744-3449. You typically need to request an inspection at least 24-48 hours in advance. Be present (or have your contractor present) at the time of inspection to answer questions and provide access. If the inspector finds code violations, you will receive a correction notice detailing what must be fixed before re-inspection.
Common Permit Mistakes to Avoid
- 1Starting work before the permit is issued. Having a pending application is not the same as having a permit. Do not begin construction until you have the actual permit in hand and posted at the job site.
- 2Submitting incomplete applications. Missing drawings, unsigned forms, or absent contractor information triggers correction notices that add weeks to your timeline. Double-check every requirement before submitting.
- 3Using suburban code assumptions in Chicago. Chicago has its own building code, which differs from the IBC/IRC used in surrounding suburbs. Do not assume that what passed inspection in Naperville or Evanston will pass in Chicago.
- 4Covering work before inspection. If you insulate and drywall before the rough framing inspection, the inspector may require you to remove the drywall for visual verification. Always get each required inspection signed off before proceeding to the next stage.
- 5Ignoring the zoning review. A building permit addresses structural and life-safety code. Zoning addresses use, setbacks, height, and lot coverage. Some projects require both a zoning review and a building permit. Overlooking zoning can result in a stop-work order even if you have a valid building permit.
How Chicago's Building Code Differs from Standard IBC
Chicago is one of a handful of U.S. cities that does not adopt the International Building Code (IBC) or International Residential Code (IRC). Instead, the city maintains the Chicago Building Code, also known as the Municipal Code of Chicago Title 14. This creates some significant differences that catch out-of-town contractors and suburban homeowners off guard:
- Fire Resistance: Chicago requires higher fire-resistance ratings for multi-family construction than the IBC, especially for buildings with 3 or more units. Type III construction (non-combustible exterior, wood-frame interior) is common in Chicago, while the same building in the suburbs might be permitted as Type V (all-wood construction).
- Porches and Decks: Chicago has specific and detailed requirements for porch and deck construction on multi-story buildings, developed in response to the tragic 2003 porch collapse in Lincoln Park. Structural plans signed by a licensed structural engineer are required for most elevated decks and porches.
- Electrical Code: Chicago uses its own Electrical Code rather than the National Electrical Code (NEC) adopted by most jurisdictions. Key differences include the prohibition of Romex (NM cable) in many applications -- Chicago requires conduit (EMT or rigid) for most residential wiring.
- Egress Requirements: Window well sizes, escape route dimensions, and basement egress requirements may differ from IRC standards.
- Plumbing Code: Chicago has its own plumbing code with requirements that differ from the International Plumbing Code, particularly regarding venting, pipe materials, and fixture connections.
The bottom line: if your contractor works primarily in the suburbs, make sure they are familiar with the Chicago Building Code before starting work in the city. A contractor who is not familiar with Chicago's code will likely face failed inspections and costly rework.
Detailed Permit Fee Schedule
Chicago permit fees are calculated based on the type of work, the estimated project valuation, and the number of trade permits required. The following table provides a more granular breakdown than the general ranges above, reflecting typical fees for the most common residential project types:
| Project Type | Typical Fee Range | Notes |
|---|---|---|
| New construction (single-family) | $500 - $5,000+ | Based on project valuation; includes plan review fee |
| New construction (multi-family) | $2,000 - $10,000+ | Higher fees for buildings with 3+ units; fire-resistance review adds cost |
| Room addition | $250 - $2,000 | Varies by square footage; structural engineering review may add fees |
| Deck construction | $150 - $500 | Includes structural plan review; higher for elevated or rooftop decks |
| Fence (5' or taller) | $75 - $150 | Simple review process; lower fees than structural projects |
| Fence (masonry/concrete) | $100 - $300 | Structural review required due to foundation requirements |
| Roof replacement | $100 - $250 | Standard residential re-roofing; higher for commercial |
| Siding replacement | $100 - $200 | Required when changing material type or altering wall assembly |
| Window / door replacement | $50 - $100 per opening | Required when changing size or location of opening; like-for-like may not need permit |
| Basement finish | $250 - $750 | Includes plumbing and electrical sub-permits if applicable |
| Electrical (Easy Permit) | $50 - $200 | Panel upgrades, new circuits, service changes |
| Plumbing (Easy Permit) | $75 - $200 | Fixture additions, water heater replacement, drain modifications |
| HVAC (Easy Permit) | $75 - $200 | Furnace replacement, new ductwork, A/C installation |
| Garage construction | $300 - $1,500 | New detached garage; includes site plan and structural review |
| Driveway / curb cut | $100 - $500 | Requires CDOT (transportation department) review in addition to DOB |
All fees are approximate and subject to change by the City of Chicago. Additional charges may apply for expedited review, plan revisions, and re-inspection fees. Always verify current fees with the Department of Buildings before submitting your application. Last verified: 2025.
Inspection Checklist: What Inspectors Look For
Knowing what the inspector will check at each stage helps you prepare and avoid failed inspections that delay your project. Here is a detailed checklist for each major inspection stage:
Foundation / Footing Inspection
- Depth: Footings must reach the frost line (42 inches minimum in Chicago). The inspector will measure from finished grade to the bottom of the footing.
- Width / diameter: Footings must meet the dimensions specified in the approved plans. Typical minimum is 12 inches diameter for single-story, 16 inches for two-story.
- Reinforcement: If rebar is specified in the plans (common for spread footings and foundation walls), the inspector verifies bar size, spacing, and coverage depth.
- Soil conditions: Footings must rest on undisturbed native soil or engineered fill. If the inspector finds loose or organic soil at the bearing depth, additional excavation or larger footings may be required.
- Formwork: Sonotube forms must be plumb and properly braced. Spread footing forms must be level and to dimension.
Framing Inspection
- Structural connections: All joist hangers, post-beam connectors, hold-downs, and tie straps must be installed per the approved plans with the correct fasteners (specified nail size, count, and pattern).
- Nailing patterns: Sheathing nailing schedule (typically 6 inches at edges, 12 inches in the field for wall sheathing) is verified. Missed nails or over-driven nails are flagged.
- Sheathing: Proper grade, thickness, and exposure rating of plywood or OSB sheathing. Correct orientation (strength axis perpendicular to framing).
- Fire blocking: Required in wall cavities at floor levels, above dropped ceilings, and at stair openings. Missing fire blocking is one of the most common Chicago inspection failures.
- Header sizes: Headers over windows and doors must match the engineered or code-prescribed sizes for the span. Undersized headers are a structural failure and must be corrected.
- Ledger board attachment: For decks, the inspector will verify bolt size, spacing, stagger pattern, and the presence of proper flashing.
Electrical Rough-In
- Conduit (Chicago requires conduit -- no Romex): EMT or rigid conduit properly supported and secured at required intervals.
- Wire sizing: Correct gauge wire for each circuit (e.g., 12 AWG for 20-amp circuits, 14 AWG for 15-amp).
- Box fill: Junction boxes and outlet boxes must not exceed the maximum conductor fill allowed by code.
- GFCI and AFCI protection: Required locations (bathrooms, kitchens, garages, outdoors, basements) must be wired for appropriate protection.
Insulation Inspection
- R-values: Insulation must meet or exceed the R-values required by the Chicago Energy Conservation Code. Typical requirements: walls R-20 or R-13+5 continuous, ceiling R-49, floor R-30.
- Air sealing: Gaps around windows, doors, electrical boxes, plumbing penetrations, and rim joists must be sealed with foam, caulk, or gaskets.
- Vapor barrier placement: In heating-dominated climates like Chicago, the vapor retarder goes on the warm side (interior face of insulation).
- Coverage: No gaps, voids, or compression. Insulation must fill the cavity completely and contact all six sides of the cavity.
Final Inspection
- Egress: All bedrooms must have a code-compliant egress window or door (minimum 5.7 sq ft opening, 20 inches minimum width, 24 inches minimum height, sill no more than 44 inches above floor).
- Smoke and CO detectors: Working smoke detectors in every bedroom, outside every sleeping area, and on every level. Carbon monoxide detectors on every level with a fuel-burning appliance or attached garage.
- Handrails and guardrails: All stairs with 4+ risers must have a graspable handrail. All surfaces 30+ inches above grade must have a guardrail meeting height and baluster spacing requirements.
- Plumbing fixtures: All fixtures operational and properly connected. Hot water on the left, proper venting, no leaks.
- Electrical: All outlets, switches, and fixtures operational. Cover plates on all boxes. GFCI outlets tested.
- Overall code compliance: The work matches the approved plans. Any field changes must have been submitted and approved as amendments to the original permit.
Common Permit Violations and How to Avoid Them
Permit violations in Chicago carry real consequences -- from fines to mandatory demolition of completed work. Here are the most common violations and how to steer clear of them:
1. Performing Work Without a Permit
Consequence: Stop-work order, fines of $500-$1,000 per day, and potential requirement to demolish and rebuild the unpermitted work under a new permit. Unpermitted work must be disclosed when selling the property and can derail a sale. How to avoid: Before starting any project, call the Chicago Department of Buildings at 312-744-3449 or check their website to determine if a permit is required. When in doubt, apply for one -- the permit fee is far less than the cost of violation fines and rework.
2. Failing to Call for Required Inspections
Consequence: If you cover work before it is inspected (e.g., drywall over uninsulated framing, concrete over unseen footings), the inspector may require you to remove the covering at your expense for verification. How to avoid: Schedule each required inspection before proceeding to the next stage. Keep a written log of inspection dates and results. Make inspection scheduling part of your construction timeline, not an afterthought.
3. Failing to Post the Permit Visibly
Consequence: The permit placard must be posted in a location visible from the public way (typically a front-facing window or the job-site fence). An unposted permit can trigger a violation notice even if the permit was properly obtained. How to avoid: Post the permit on the first day of construction and keep it visible until the final inspection is complete and the permit is signed off.
4. Deviating from Approved Plans
Consequence: If the inspector finds that the work does not match the approved drawings, the work must be brought into conformance or a plan amendment must be submitted and approved. This can add weeks of delay. How to avoid: If field conditions require changes from the approved plans, submit a plan amendment to the DOB before proceeding. Keep a copy of the approved plans on site at all times for reference during inspections.
5. Using Unlicensed Contractors
Consequence: The homeowner can be held liable for work performed by unlicensed contractors. Insurance claims may be denied, and the permit may be revoked if the contractor listed on the application is not properly licensed. How to avoid: Verify your contractor's license status through the Chicago Department of Buildings website. Confirm they carry current General Liability and Workers' Compensation insurance. Request copies of their license and insurance certificates before work begins.
6. Exceeding the Scope of the Permit
Consequence: A permit covers only the specific work described in the application and approved plans. If you expand the scope -- for example, adding a bathroom to a basement that was permitted only for framing and electrical -- the additional work is considered unpermitted. How to avoid: Define the full scope of the project before applying for the permit. If the scope changes during construction, apply for a permit amendment or a separate permit for the additional work before starting it.
Resources & Contact Information
Chicago Department of Buildings (DOB)
- Phone: 312-744-3449
- Address: 121 N. LaSalle Street, Room 906, Chicago, IL 60602
- Hours: Monday-Friday, 8:00 AM - 4:30 PM (check for holiday closures)
- Online Permits: Available through the City of Chicago DOB website
For questions about specific permit requirements, you can also call 311 (within Chicago) or 312-744-5000 (from outside Chicago) for general city services information.