Illinois engineering services
PE Stamp and Permit-Ready Plans in Illinois
Structural, architectural and MEP drawings sealed by an Illinois-licensed engineer, prepared to the Chicago Building Code or your municipality's adopted codes.
- Stamped by a PE licensed in Illinois
- Accepted by Illinois building departments
- Residential, commercial and industrial
Illinois permit plans, from Chicago two-flats to downstate shops
Illinois has two very different code environments. The City of Chicago writes and enforces its own Chicago Construction Codes, including the Chicago Building Code, and expects drawings prepared to them. Outside Chicago, Illinois has no single statewide building code for most private construction, so suburbs, towns and counties adopt the International Codes locally. Getting a PE stamp in Illinois starts with knowing which of those systems applies to your address.
PE Engineer prepares structural, architectural, MEP, civil and industrial drawings for Illinois projects, sealed by an Illinois-licensed engineer through our network of state-licensed PEs. We confirm the local amendments, licensing requirements and submittal format for your municipality before design starts.
Chicago-area work includes porch rebuilds, basement dig-outs and underpinning in two-flats and three-flats, wall removals, rear additions and dormers, and commercial tenant improvements. In the suburbs and downstate, we see warehouse mezzanines and storage racks along the I-55 and I-80 corridors, OSHA stair and guardrail upgrades, pole barns and machine sheds, and agricultural and processing facilities.
How licensing works. Engineering drawings must be sealed by a Professional Engineer licensed in Illinois. PE Engineer works with a network of state-licensed PEs, so every set we deliver is reviewed and stamped by an engineer who holds an active license in Illinois. Their name and license number appear on the seal, exactly as your building department requires.
Popular in Illinois
- Chicago porch rebuilds
- Basement dig-outs and underpinning
- Wall removal and rear additions
- Warehouse mezzanines and racks
- Pole barns and machine sheds
- Commercial tenant improvements
Engineering services for Illinois projects
Drawings for Chicago, the suburbs and downstate Illinois in every discipline, sealed by an appropriately licensed Illinois engineer.
Structural engineering in Illinois
Porch framing to Chicago requirements, underpinning for basement lowering, steel beams for wall removals, snow drift on low roofs, frost-depth footings, and seismic design for southern Illinois near the New Madrid zone.
Architectural plans in Illinois
Floor plans, elevations and site plans for additions, dormers, deconversions, new homes and retail or restaurant suites, drawn to the Chicago Building Code or your municipality's adopted IBC and IRC.
MEP engineering in Illinois
HVAC and ventilation design, electrical plans to the Chicago Electrical Code or NEC, plumbing to the Illinois Plumbing Code or Chicago requirements, energy code compliance, and fire sprinkler, alarm and kitchen hood drawings.
Industrial and equipment stamps in Illinois
Storage rack engineering, mezzanines, conveyor platforms, equipment anchorage, crane runway beams, and OSHA stairs, ladders and guardrails for distribution centers, food plants and manufacturing facilities statewide.
Chicago codes and Illinois state requirements
Chicago maintains the Chicago Construction Codes, which include the Chicago Building Code, based on the IBC with extensive Chicago amendments, along with the city’s own electrical, mechanical, plumbing, energy and fire provisions. Elsewhere, municipalities and counties adopt the I-codes locally, and the state sets several requirements that apply statewide.
- Chicago Building Code and related Chicago Construction Codes, inside city limits
- IBC and IRC as adopted by suburban and downstate jurisdictions
- Illinois Energy Conservation Code, based on the IECC
- Illinois Plumbing Code, administered by the Illinois Department of Public Health
- Illinois Accessibility Code
- NEC/NFPA 70 or the Chicago Electrical Code
Snow, tornadoes and seismic zones in Illinois
Northern Illinois buildings are designed for cold winters, meaningful snow and deep frost. Snow loads increase toward the northern part of the state, and drifting against taller adjacent buildings is a frequent issue in Chicago, where a new third floor or rooftop addition can create drifts on a neighbor’s lower roof. Footings for porches, additions and garages must extend below the local frost depth, which is deeper in the north than in the south.
Tornadoes and severe thunderstorms affect the whole state, so wind uplift and lateral bracing deserve attention on pole barns, shops and large metal buildings. Southern Illinois lies near the New Madrid and Wabash Valley seismic zones, and seismic design values there are significantly higher than in Chicago. Flooding along the Mississippi, Illinois and Rock rivers and in many suburban floodplains brings FEMA rules into play, and collar counties often have their own stormwater ordinances. Soft clays and high groundwater in parts of the Chicago area also shape basement and underpinning work.
How permits work in Illinois
In Chicago, permits run through the Department of Buildings, with standard plan review for most projects and simpler paths for limited scopes of work. Suburban municipalities and counties each run their own departments, many with online portals and some using third-party plan review consultants. Downstate counties vary widely, and some rural areas have little building permit review at all.
- Confirm whether you are inside Chicago, a suburb or unincorporated county, and which codes apply.
- We prepare drawings and calculations, sealed by an Illinois-licensed PE, or an Illinois Structural Engineer where the work requires one.
- Submit through the local portal or permit desk and receive review comments.
- We respond to comments and revise within the original scope until approval.
Chicago review comments often focus on porch details, fire separation, exiting and zoning, while suburban reviewers frequently add stormwater and site requirements. We plan for both from the start. For downstate farm buildings with no local review, a sealed design still documents the snow, wind and frost criteria for lenders, insurers and the building supplier.
Cities and counties we serve in Illinois
- Chicago
- Aurora
- Joliet
- Naperville
- Rockford
- Springfield
- Elgin
- Peoria
- Champaign
- Waukegan
- Cicero
- Bloomington
- Evanston
- Schaumburg
- Cook County
- DuPage County
- Will County
- Lake County
Plus every other city, town and county in Illinois. If your project is in Illinois, we can stamp it.
How it works
From first message to stamped drawings, you deal directly with the engineering team.
Step 1
Send your project
Fill out the quote form with the address, scope and any drawings, photos or plan-check comments you already have. Two minutes is enough.
Step 2
Get a fixed-fee quote
An engineer reviews the scope and replies with a clear fixed price and delivery date for your project in Illinois. No hourly surprises.
Step 3
Engineering and drafting
We run the calculations, prepare the drawings to the codes your jurisdiction enforces, and check every sheet before sealing.
Step 4
Stamped set delivered
You receive the sealed PDF set ready to submit. If the plan reviewer has comments, we answer them and revise at no charge within scope.
PE stamp and permit plan FAQs for Illinois
Can you provide a PE stamp for my project in Illinois?
Yes. Illinois projects are sealed by a Professional Engineer licensed in Illinois through PE Engineer’s network of state-licensed PEs. Illinois also licenses Structural Engineers separately, and certain structural work must be sealed by an Illinois Licensed Structural Engineer. We match your project with the appropriate Illinois license before design begins.
Do Chicago projects follow a different code?
Yes. Inside city limits, projects follow the Chicago Construction Codes, which differ from the codes used in surrounding suburbs in areas such as porches, exiting, fire separation and electrical work. We prepare Chicago drawings to the Chicago Building Code and related city codes, not to the suburban I-code editions.
Can you design a replacement porch in Chicago?
Yes. Chicago has specific requirements for wood and steel porches, including footing depth, framing, connections, guards and fire separation. We prepare porch framing plans, sections and details with calculations, suitable for repair and rebuild permits on two-flats, three-flats and courtyard buildings.
Can you engineer a basement dig-out?
Yes. Lowering a basement floor in a Chicago-area two-flat or bungalow usually requires underpinning the existing foundation in sequenced segments, new footings and slab, waterproofing coordination and often an overhead sewer or ejector pit. We design the underpinning, temporary support and structural details for the permit set.
Do you work on warehouses and industrial sites in Illinois?
Yes. We prepare stamped drawings for storage racks, mezzanines, equipment platforms, crane and hoist beams and OSHA-compliant stairs and guardrails for facilities in Will County, the I-55 and I-80 corridors, the Rockford area and downstate. Send layouts or equipment data and we usually return a fixed-fee quote the same day.