Rialto's Solar Energy: The Rules That Matter

Every city handles solar energy a little differently. In Rialto, California, there are 2 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Expedited Solar Permitting

Rialto must approve small residential rooftop solar systems administratively and without discretion under Chapter 15.05 of the Municipal Code, adopted to comply with the state's Solar Rights Act and AB 2188. The building official reviews applications against a published checklist, can require only one inspection, and may only impose a discretionary use permit with documented evidence of a specific, adverse public health or safety impact.

Key details: Governing chapter: RMC Chapter 15.05, adopted 2015. System size cap: 10 kW AC / 30 kW thermal, 1-2 family homes. Review type: Nondiscretionary administrative approval, no public hearing. Inspections: Only one inspection required for eligible systems. Appeal path: Denials appealable to city planning commission.

Installing a small residential rooftop solar system without first obtaining the required administrative permit exposes the installation to Rialto's general unpermitted-structure enforcement under Chapter 15.08, since Section 15.05.030 does not exempt solar systems from the city's normal building permit requirement, only from discretionary review. If the building official wrongly denies expedited approval or imposes conditions beyond what is needed to mitigate a documented adverse impact, Section 15.05.060(C) lets the applicant appeal that decision to the city planning commission.

Panel Permits

Rooftop solar panel installers in Rialto submit applications electronically, get a printed approval stamp from the plan reviewer, and present it to the Building Department for a permit that must issue in a timely manner. Section 15.05.060 caps the process at one required inspection, scheduled within a three-hour window after 24 hours' notice, with a re-inspection fee only if the project wasn't ready.

Key details: Application method: Electronic submittal to city or plan reviewer. Permit pickup: Stamped hard copy presented to Building Department. Inspections: One inspection required; consolidated where possible. Notice window: 24 hours' notice; roughly 3-hour arrival window. Re-inspection: Fee assessed if project not ready at visit.

Failing to have the rooftop solar installation ready when the scheduled inspection arrives is not a code violation in the ordinary sense, but Section 15.05.060(H) allows the city to charge a re-inspection fee for the wasted visit before a follow-up inspection is scheduled. Installing panels without first completing the electronic application and obtaining the stamped permit from the Building Department exposes the work to enforcement as an unpermitted structure under the city's adopted California Building Code.

The Bottom Line

Rialto's solar energy rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Rialto is broadly strict or permissive.

Keep in mind that Rialto can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.