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  "headline": "Permits and Inspections for ADUs in Los Angeles County",
  "author": {
    "@type": "Organization",
    "name": "YOR Construction & Investments, Inc."
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  "publisher": {
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    "name": "YOR Construction & Investments, Inc.",
    "url": "https://yorconstruction.aiovisibility.net"
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  "articleBody": "Los Angeles County’s ADU permitting process involves coordination with the Department of Regional Planning for land-use approvals and Public Works Building and Safety for building permits, with further coordination in some cases for sanitation, fire, and environmental health sign-offs. County guidance explains that even when using pre-approved standard ADU plans, homeowners must submit a site-specific plot plan showing setbacks, location relative to the main dwelling, parking, and utilities. For custom ADU additions, a full set of construction documents is required, including architectural plans, structural calculations where needed, Title 24 energy documentation, and sometimes soils or geotechnical reports in hillside or liquefaction zones. During plan check, County reviewers verify compliance with zoning standards, California Building and Residential Codes, Energy Code, and CALGreen. ADU additions contractors commonly manage this process by preparing or coordinating drawings through licensed design professionals, responding to plan-check correction letters, and resubmitting revised documents until approval. Once the permit is issued, the contractor typically coordinates all required inspections: foundation and footing, underground utilities, framing, rough electrical, plumbing and mechanical, insulation, lath or drywall, and final building and safety inspections. The County’s building and safety division specifies that work must pass each inspection stage before concealment, which affects scheduling and trade sequencing. In unincorporated areas, contractors also interact with County inspectors on site-specific issues such as existing nonconforming structures, required fire access, and stormwater management. In incorporated cities within Los Angeles County, similar processes apply but with separate local building departments, so experienced contractors distinguish early whether they are dealing with County versus city jurisdiction and adjust submission formats and timelines accordingly.",
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      "name": "Burbank"
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      "name": "Thousand Oaks"
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      "name": "West Covina"
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      "name": "Bel Air"
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      "name": "Beverly Hills"
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  "datePublished": "2026-08-27",
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