Ontario, CA solar permits
Residential solar permits in Ontario, CA were issued in a median of 9 business days in 2023, with a median permit cost of $383.
Permitting and interconnection in Ontario
| Permit issued (median) | 9 business days (2023) |
|---|---|
| Inspection scheduled (median) | 16 business days (2023) |
| Utility approval before install (median) | Same day (2024) |
| Final interconnection to PTO (median) | 5 business days (2024) |
| Median residential permit cost | $383 |
| 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 | Not required |
| Third-party plan review | No |
A Ontario 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 Ontario has adopted, each with the article cited.
- Any correction Ontario 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 Ontario, CA?
The median time to issue a residential solar permit in Ontario was 9 business days in 2023, according to NREL SolarTRACE.
How much does a solar permit cost in Ontario?
The median residential solar permit cost in Ontario is $383 (NREL SolarTRACE). Confirm the current fee schedule with the jurisdiction.
How many inspections does a solar install need in Ontario?
Ontario requires 2 inspections for a residential solar installation.
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.