The complete inspection order for ADU construction in LA — from first dig to certificate of occupancy. Know exactly what comes next.
ADU (Accessory Dwelling Unit) inspections in Los Angeles follow the same LADBS framework as any construction project, but the scope is typically smaller and more predictable. A new-build ADU usually requires 10–14 inspections. Garage conversions require fewer since foundation and framing work may be minimal.
The key rule: inspections must happen in the correct order. LADBS will fail any inspection requested out of sequence. Each inspection must pass before the next phase of construction can begin.
Requires full sequence: grading, foundation, slab, framing, all rough-ins, insulation, drywall, and finals. Typically 12–14 inspections total.
Often skips grading, foundation, and slab. Starts at framing modifications. Typically 8–10 inspections depending on scope of structural changes.
Verifies excavation depth, soil conditions, and erosion control. Required before any foundation work. Geotechnical report must be on file.
Checks rebar placement, footing dimensions, anchor bolts. Must pass before concrete pour. Inspector needs clear access to all footings.
Under-slab plumbing must pass first. Then vapor barrier, reinforcement, and grade are inspected before the slab pour.
The most comprehensive single inspection. All structural elements: walls, beams, posts, shear panels, hold-downs, roof framing, headers. Highest failure rate of any inspection — thorough preparation is critical.
Supply lines, drain lines, venting while walls are open. Pressure test must be completed. Common ADU fail point: incorrect drain slope.
Wiring, panel, grounding, GFCI/AFCI locations. ADU sub-panel must be properly sized and connected to main panel per approved plans.
HVAC ductwork, mini-split line sets, ventilation. Many ADUs use ductless mini-splits, which simplifies this inspection.
Insulation R-values, air sealing, and California Title 24 energy compliance. Must pass before drywall can be installed.
Fastener spacing on drywall before taping. Fire-rated assemblies require specific drywall type and layer count.
Four separate final inspections: plumbing (fixtures, water heater), electrical (panel labels, devices, smoke/CO), mechanical (equipment operational), and building (all corrections resolved, address posted).
Issued after all final inspections pass and all corrections are resolved. Required before the ADU can be legally occupied.
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10–14 for new builds, 8–10 for garage conversions. The exact number depends on scope and structural complexity.
Grading, foundation, slab, framing, rough plumbing/electrical/mechanical, insulation, drywall, then finals before certificate of occupancy.
No. Every required inspection must pass in sequence. Some garage conversions may have fewer required inspections, but you cannot skip any that are on your permit.
The inspection process itself typically spans 3–6 months for new builds, depending on construction pace. Each inspection must be requested at least 1 business day in advance.
InspectPilot knows the exact inspection sequence for your ADU type and handles scheduling automatically.
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