12 business daysto permit, median (2022)
19 business daysto inspection
same dayfinal interconnection to PTO
Plan reviewhow permits are issued
Permitting and interconnection in Northbrook
| Permit issued (median) | 12 business days (2022) |
|---|---|
| Inspection scheduled (median) | 19 business days (2022) |
| Utility approval before install (median) | Same day (2024) |
| Final interconnection to PTO (median) | Same day (2024) |
| Online submission | Not on record |
| Instant permitting | Not available |
| Same-day, over-the-counter permits | Not available |
| Structural review, systems under 10 kW | Required |
| Electrical review, systems under 10 kW | Not required |
| Inspections required | 2 |
| Rough-in inspection | Required |
| SolSmart designation | Gold · 3-day permit commitment |
A Northbrook plan set from Ballast
Enter the address and Ballast finds the jurisdiction and the utility, pulls the aerial and parcel line, and builds the set on ANSI B: cover, site plan, roof or array plan, attachment details, line diagrams, NEC calculations, labels and spec sheets.
- Checks run under the code edition Northbrook has adopted, each with the article cited.
- Any correction Northbrook sends back becomes a rule for the jurisdiction, so the next set already answers it.
- The Solar Agent follows the permit through to approval, then moves the job on to interconnection and install.
Questions
How long does a solar permit take in Northbrook, IL?
The median time to issue a residential solar permit in Northbrook was 12 business days in 2022, according to NREL SolarTRACE.
How many inspections does a solar install need in Northbrook?
Northbrook requires 2 inspections for a residential solar installation, including a rough-in inspection.
Source: SolarTRACE, National Renewable Energy Laboratory (NREL), 2025-09-09 release. Times are medians for residential solar in the year shown. Requirements change — confirm current rules, fees and forms with the jurisdiction before you submit.