ADU Rules in Calabasas.
Local ADU regulations, permit fees, setback requirements, and typical timelines for Calabasas. Last updated 2026-05-27.
Calabasas ADU Requirements
Attached ADU: up to 25 ft
Calabasas is not near major transit; replacement parking generally required for conversions.
Las Virgenes Municipal Water District (LVMD) connection fees may apply.
Design 5 weeks · Permit 7 weeks · Build 38 weeks
Plain-language summary
In Calabasas, a detached ADU requires a minimum 4-foot side setback and 4-foot rear setback. The maximum height for a detached ADU is 16 feet, while an attached ADU may be up to 25 feet. The maximum size for a detached ADU is 1,200 sq ft; a Junior ADU (JADU) is limited to 500 sq ft. Replacement parking is required for most projects. Typical permit fees range from $8,000 to $16,000. A typical project takes approximately ~12 months from design start to move-in, including 5 weeks of design, 7 weeks for permit review, and 38 weeks of construction.
⚠️ ADU rules change frequently. Always verify current requirements with the Calabasas Building & Safety Department before submitting plans. Official source →
What to Watch Out For
- Las Virgenes Municipal Water District (LVMD) requirements: fire-resistive landscaping and defensible space required.
- HOAs are very common in Calabasas — review CC&Rs and obtain HOA approval before permitting.
- Calabasas Municipal Code has additional open space preservation requirements for hillside lots.
- VHFHSZ designation applies to much of the city; fire-resistant construction required.
How Long Does It Take to Get an ADU Permit in Calabasas?
Site study, floor plans, elevations, structural drawings.
Plan check, corrections, and permit issuance by Calabasas Building & Safety.
Foundation, framing, MEP rough-in, finishes, final inspection.
A licensed engineer on your lot, free.
30 minutes. We walk the property, figure out what's feasible, and answer any questions you have.
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