Local-market expertise across every Illinois AHJ. Our solar permit drawings are engineered to comply with NEC 2020 and built for first-pass approval from Chicago to Aurora to Joliet — and every jurisdiction in between.
From dense metro markets to rural Illinois counties, our solar plan sets are customized for each jurisdiction's specific requirements. We know every Illinois AHJ's expectations.
The largest Illinois solar market. City of Chicago Buildings Dept processes a high volume of residential solar permits — our drawings are built to their exact portal and format requirements.
Cook County Permits and DuPage County Building are key Illinois markets with distinct solar permit drawing requirements. Our team has prepared hundreds of plan sets for both jurisdictions.
Smaller Illinois AHJs often have streamlined requirements but still need code-compliant documentation. Our plan sets scale down without cutting corners on NEC 2020 compliance.
Commonwealth Edison (Exelon) serves Northern IL & Chicago metro. Our solar plan sets include all ComEd-specific interconnection documentation formatted for their application process.
Ameren Illinois serves Central & Southern IL. Every plan set for Ameren IL territory includes their specific interconnection application documentation.
All Illinois residential solar permit drawings must comply with NEC 2020 & Illinois Energy Conservation Code. Our team stays current on all Illinois-specific amendments to base NEC requirements.
Illinois adopts NEC 2020 under the Illinois Energy Conservation Code. Chicago has additional solar permit drawing requirements through the Chicago Building Code. ComEd requires specific solar engineering drawings for interconnection under Illinois Net Metering law.
All Illinois solar permit drawings must comply with NEC 2020 & Illinois Energy Conservation Code. This includes NEC Article 690 for PV system wiring, Article 705 for interconnection, and NEC 690.12 for rapid shutdown — plus any Illinois-specific local amendments.
Illinois has 102 counties each with their own solar permit documentation requirements. Our team knows what City of Chicago Buildings Dept, Cook County Permits, and DuPage County Building expect — and prepares every Illinois plan set to match those specific requirements exactly.
Beyond AHJ submission, Illinois projects need utility interconnection drawings. Commonwealth Edison (Exelon) and Ameren Illinois each have specific solar engineering drawing requirements — every Illinois plan set includes both.
All Illinois solar PV permit drawings must document NEC 690.12 rapid shutdown compliance. Our solar plan sets include complete rapid shutdown documentation — the most commonly requested correction item from Illinois AHJs.
A streamlined process designed for Illinois solar installers who need accurate permit documentation fast.
Send us the Illinois address, roof photos, system specs, and equipment models — takes under 5 minutes.
Day 1Our Illinois design team builds your complete solar permit plan set to Illinois AHJ and code standards.
24–48 hoursYou receive the complete AHJ-ready package — every sheet needed for Illinois permit submission.
24–48 hoursIllinois AHJs like City of Chicago Buildings Dept review the permit package. We handle any revisions at no charge.
2–5 weeksPermit issued — install the system, pass final inspection, and your utility processes PTO.
1–3 wks post-install⏱ Typical Illinois AHJ review time: 2–5 weeks. Submitting a complete, first-pass-ready plan set is the single best way to minimize your total project timeline.
More than 150 Illinois solar companies rely on Permit Design for permit-ready solar plan sets, delivered in 24–48 hours.
| Factor | ⚠️ In-House Solar Permit Drawing | ✅ Outsourced to Permit Design |
|---|---|---|
| Staffing | Requires dedicated in-house engineer or drafter | Per-project support — no fixed overhead |
| Turnaround | Slows during peak Illinois install seasons | Consistent 24–48 hr delivery year-round |
| Illinois AHJ Knowledge | Staff may not know all Illinois AHJ requirements | We know City of Chicago Buildings Dept, Cook County Permits, DuPage County Building, and every Illinois AHJ |
| Code Compliance | Risk of missed Illinois code amendments | Always current with NEC 2020 and all local amendments |
| Utility Docs | Separate documentation per Illinois utility | All Illinois utility interconnection docs included |
| Revisions | Internal revisions consume engineer time | Unlimited free revisions until Illinois AHJ accepts |
| Scalability | Hard to scale for busy Illinois project seasons | Handle 1 to 100+ Illinois plan sets per month |
Every Illinois solar permit plan set includes interconnection documentation formatted for each utility — no separate package needed.
Our solar permit design services cover every city and county across all 102 counties of Illinois. Click any city for location-specific solar permit information.
Every Illinois solar permit plan set is reviewed by our senior design team before delivery, ensuring 100% compliance with NEC 2020 and Illinois AHJ requirements. We don't just draw plans — we engineer them for first-pass approval and long-term safety.
“My focus is eliminating soft costs for Illinois solar installers. A plan set needs to be so accurate that the City of Chicago Buildings Dept reviewer has no reason to issue a correction. We stay ahead of NEC 2020 so you can stay on the roof.”
Illinois adopts NEC 2020 under the Illinois Energy Conservation Code. Chicago has additional solar permit drawing requirements through the Chicago Building Code. ComEd requires specific solar engineering drawings for interconnection under Illinois Net Metering law.
Illinois has 102 counties each administering their own solar permit requirements. City of Chicago Buildings Dept may require different formats than Cook County Permits or DuPage County Building. Our team prepares every Illinois plan set to the specific expectations of your local AHJ — not just minimum NEC 2020 requirements.
Most Illinois AHJs review residential solar permit applications within 2–5 weeks. A complete, first-pass-ready plan set submitted on day one is the most effective way to minimize your total timeline.
IL solar permit drawings must comply with NEC 2020. Chicago has specific requirements through the Chicago Building Code. ComEd and Ameren each require solar engineering drawings formatted for their interconnection application.
Chicago Building Dept requires solar permit plan sets including architectural/structural drawings, single-line electrical diagram, equipment specifications, and documentation for Net Metering with ComEd.
ComEd requires solar engineering drawings including single-line diagram, site plan, system specifications, and completed Illinois Net Metering interconnection application. Our solar plan sets include all required ComEd documentation.
Most IL solar permit plan sets are delivered in 24–48 hours. We serve all 102 Illinois counties including Cook, DuPage, Lake, and Will.
AHJ-ready Illinois solar permit drawings for any city, any county, any utility. First-pass approval is our standard — not just our goal.
Order Your Illinois Plan Set NowWe provide residential solar permit drawings and plan sets across all 50 states. Explore our solar permit design services in states neighboring Illinois.