Accessory Structures in Santa Clarita, CA: What Residents Actually Need to Know

If you live in Santa Clarita or are thinking about moving there, accessory structures are one of those things you probably won't think about until they affect you directly. Santa Clarita has 5 specific rules on the books covering different aspects of accessory structures, and some of them might surprise you.

Carport Rules

Carports require building permits. Carports with solar panels are permitted as accessory uses in all districts subject to an administrative permit per SCMC 17.48.010.

Key details: Permit: Required for new carports. Solar Carports: Administrative permit (17.48.010). Height: Solar panels excluded from calc. Setback: Per underlying zone.

Unpermitted carports: stop-work orders, required removal or retroactive permitting with penalty fees. Fines $200 to $1,000.

ADU Rules

Santa Clarita allows ADUs under state law (AB 68, SB 13, AB 881) and local regulations. One ADU plus one JADU per single-family lot. ADUs in flood zones must comply with FEMA requirements. CA HCD reviewed and provided guidance on the city's ADU ordinance in 2023.

Key details: Allowed: 1 ADU + 1 JADU per single-family lot. Max Size: Up to 1,200 sq ft (detached). Owner Occupancy: Not required (state law through 2025). Flood Zones: Must comply with FEMA requirements. HCD Review: March 2023 guidance letter.

Unpermitted ADUs face code compliance action. The city may require retroactive permitting or removal.

Shed Rules

Santa Clarita exempts small accessory structures under 120 square feet from building permits. Sheds must meet setback requirements. One-story detached structures for storage, playhouses, greenhouses, and similar uses qualify for the exemption.

Key details: No Permit: Under 120 sq ft, one story. Types: Sheds, playhouses, gazebos, greenhouses. Setbacks: Zoning setbacks still apply. Use: Storage only, not habitation.

Sheds exceeding 120 sq ft without permits face code compliance action. Structures in setback areas may need to be relocated.

If you are coming from a city with tighter rules, you will find Santa Clarita gives residents more flexibility on shed rules.

Garage Conversions

Santa Clarita permits garage conversions to living space or ADUs. California state law (SB 13) streamlined garage-to-ADU conversions. Building permits are required. Converted space must meet habitability standards.

Key details: Permit: Building permit required. ADU Conversion: Parking replacement not required (SB 13). Standards: CBC habitability requirements. Ceiling Height: 7 feet minimum. Sub-Permits: Electrical and plumbing if applicable.

Unpermitted conversions require retroactive permitting. Non-compliant spaces may need corrections to meet habitability standards.

Tiny Homes

Tiny homes on wheels are not permitted as permanent dwellings. Fixed tiny homes must meet ADU standards. No owner-occupancy requirement currently in Santa Clarita.

Key details: On Wheels: Not permitted as dwelling. Fixed: Must meet ADU requirements. Owner Occupancy: Not required. Max ADU Size: 1,200 sq ft detached.

Unpermitted dwellings: removal or retroactive permitting. Zoning violations: fines and required relocation. Occupancy without certificate: prohibited.

The Bottom Line

Santa Clarita's accessory structures 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 Santa Clarita is broadly strict or permissive.

Keep in mind that Santa Clarita 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.