Panel Permits: Downey vs Lancaster
How do panel permits rules compare between Downey, CA and Lancaster, CA?
Downey has fewer restrictions than Lancaster.
Downey, CA
Los Angeles County
Downey provides expedited permitting for small residential rooftop solar per AB 2188 and the Solar Rights Act. Systems up to 10 kW AC qualify for streamlined review. Panels cannot exceed the maximum building height.
View full Downey rules →Lancaster, CA
Los Angeles County
Lancaster was the first U.S. city to require solar on new homes. Its Zero Net Energy Home Ordinance (effective Jan 1, 2018) mandates a solar system equivalent to 2 watts per square foot for new residential construction.
View full Lancaster rules →Key Facts Comparison
| Fact | Downey | Lancaster |
|---|---|---|
| Streamlined | Yes, per AB 2188 | - |
| Max Size | 10 kW AC for expedited review | - |
| Height | Cannot exceed building max | - |
| New Construction | Solar required per CA Energy Code | - |
| Effective | - | January 1, 2018 |
| Requirement | - | 2 watts per sq ft |
| Compliance Paths | - | Solar / fee / combo |
| First in US | - | Yes (2017 adoption) |
Highlighted rows indicate differences between cities.
Downey FAQ
Do I need a permit for solar panels?
Yes, a building and electrical permit is required. Many jurisdictions offer expedited or over-the-counter permits for standard residential rooftop solar systems.
Can my neighbor build something that shades my solar panels?
Many states have solar access laws that protect existing solar installations. Check state law and Downey zoning code for solar easement protections.
Lancaster FAQ
Do new homes in Lancaster need solar panels?
Yes. The Zero Net Energy Home Ordinance (effective Jan 1, 2018) requires new single-family homes to have a solar system equivalent to 2 watts per square foot of conditioned floor area, or pay a mitigation fee in lieu.
Can I pay a fee instead of installing solar?
Yes. Builders can fully pay an in-lieu mitigation fee, or combine partial solar with a partial fee. The combined value must equal the 2 W/sq ft requirement; details set by the city's permit process.
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