LA ADU permits cost $2,900–$5,000+ depending on size and location. School impact fees add more. See 2026 fee breakdown, steps, and timeline.
An ADU permit in Los Angeles costs $2,900–$5,000 for a 600–800 sq ft unit. Base permit fee is $760 plus 1.4% of project value. School district impact fees add another $3–$4 per square foot — roughly $1,800–$3,200 on top of permit fees for most LA ADUs.
Start with a ZIMAS check to confirm ADU eligibility for your parcel. Submit plans via ePlanLA — site plan, floor plan, elevations, and Title 24 energy calc required. Standard plan check takes 21–60 days; using LA's Standard Plan Program for pre-approved ADU designs can bypass plan check entirely. Inspections cover all major construction phases.
Standard ADU permits in LA take 45–90 days. LA's Standard Plan Program dramatically reduces this — pre-approved designs can be permitted in 2–3 weeks. Hillside parcels and properties in Very High Fire Hazard Severity Zones add review time regardless of approach.
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