Inspection Steps for ADU Construction in Canoga Park
Successful Accessory Dwelling Unit (ADU) projects in Canoga Park, California, depend on passing inspections that confirm safety, durability, and compliance. Inspections guide the sequence of work and protect homeowners, occupants, and neighbors. This walkthrough explains common inspection milestones in Los Angeles and how to prepare for each one. For a smoother path from foundation to finals, consider teaming with specialists experienced in ADU construction who can coordinate documentation and inspector access.
Pre-Construction Preparation
Before work begins, verify permits are issued and plans are on site. Post the permit card where inspectors can sign off each stage. Review the drawings with your contractor to ensure everyone understands structural notes, energy requirements, and special conditions. Establish a communication plan to schedule inspections with enough lead time so crews can stay productive without closing work prematurely.
Site Work and Foundation Inspections
Inspection begins with the ground. After excavation and formwork, inspectors check trenches, rebar placement, anchors, and setbacks. They confirm compaction, vapor barriers where required, and any under-slab plumbing or electrical sleeves. Only after approval is concrete placed. Following the pour, additional inspections may verify anchor bolt placement, holdown hardware, and slab surfaces where applicable.
If converting a garage, expect close attention to foundation upgrades and slab conditions. Moisture control measures—such as capillary breaks and treated bottom plates—are critical. Document any unexpected conditions with photos and revised details to maintain alignment with the approved plans.
Framing and Shear Inspections
When walls, floors, and roofs are framed, schedule the framing inspection. Inspectors review lumber grades, nailing patterns for shear walls, holdowns, straps, headers, and truss or rafter connections. They look for proper fire blocking and draft stopping to limit flame and smoke spread. Window and door installations are reviewed for flashing details and egress sizing where applicable. If corrections are noted, address them fully before reinspection to avoid delays.
Rough MEP (Mechanical, Electrical, Plumbing)
With framing in place but before insulating, rough-ins are inspected. Plumbing tests verify pressure and leak-free connections, drains are sloped correctly, and cleanouts are accessible. Electrical inspections check conductor sizes, box fill, AFCI/GFCI protection, and panel labeling. Mechanical inspections confirm duct installation, vent terminations, clearances to combustibles, and condensate management. Bathroom exhaust duct runs, kitchen ventilation, and makeup air (where required) are common focus points.
Exterior Weatherproofing
Inspectors often review exterior lath, weather-resistive barriers, and flashing. Ensure that building paper, tapes, and sealants are installed per manufacturer specifications and best practices. Roof underlayment, penetrations for vents, and step flashing at roof-to-wall intersections should be complete and visible. Proper weatherproofing at this stage prevents failures that are difficult and costly to remedy later.
Insulation and Energy Compliance
After rough MEP and before drywall, insulation installation is inspected. Batts must fit snugly without gaps, compression, or voids. Spray foam and rigid insulation require documentation of R-values and fire safety properties. Inspectors may also check air sealing at penetrations and top plates, as well as compliance with lighting efficacy, controls, and ventilation requirements noted in the energy documents. Keep your Title 24 forms and product cut sheets accessible.
Drywall and Interior Build-Out
Once insulation is approved, drywall can be hung. In some cases, inspectors review gypsum board type and fastener spacing, especially for fire-resistance-rated assemblies near garages or between units. Maintain protection for installed tubs, fixtures, and floors to prevent damage that could necessitate rework.
Exterior Finishes and Site Work
Stucco, siding, trim, roofing, and exterior paint are inspected to ensure proper installation and weather protection. At the site level, ensure positive drainage away from buildings, safe walking surfaces, and guardrails or handrails where required. For detached ADUs, verify address signage and lighting at the entry to assist emergency responders and residents alike.
Final Inspections
Final inspections confirm that the ADU is safe and ready for occupancy. Inspectors check smoke and carbon monoxide alarms, door hardware, tempered safety glazing, GFCI/AFCI protection, and that all fixtures and appliances operate correctly. Clear access, clean finishes, and labeled panels convey professionalism and help achieve approval the first time.
Prepare a punch list before final inspections to catch minor issues—loose plates, missing caulk, or hardware adjustments—so corrections are completed proactively. Keep manuals, warranties, and maintenance information organized and ready for handover.
Scheduling and Communication Best Practices
- Lead Time: Request inspections ahead of need to prevent idle time between trades.
- Documentation: Maintain an updated field set with approved revisions and energy documents.
- Access: Ensure gates are unlocked and the site is safe for inspectors to move around freely.
- Trade Readiness: Coordinate so multiple inspections can occur together when appropriate.
Common Inspection Corrections and How to Avoid Them
- Improper Flashing: Mock up window and door flashing; train crews and photograph assemblies.
- Missing Fire Blocking: Review locations at concealed spaces; add blocks before drywall.
- Inadequate Vent Terminations: Verify duct lengths, cap types, and distances from openings.
- Electrical Box Fill and Labeling: Check conductor counts and panel schedules in advance.
- Drainage Issues: Confirm slopes, downspout extensions, and clearances to grade around the structure.
Frequently Asked Questions
Q: How many inspections will my ADU require? A: It depends on the scope, but most projects include foundation, framing, rough MEP, insulation, and final inspections, with additional exterior or specialty inspections as needed.
Q: Who schedules inspections? A: Typically the contractor schedules inspections with LADBS. Owners should receive updates and be ready to provide access if needed.
Q: What happens if corrections are required? A: The inspector issues notes that must be addressed before reinspection. Complete corrections thoroughly to avoid multiple rounds.
Q: Can I insulate or cover walls before rough inspections? A: No. Concealing work prior to inspection can lead to removal and delays.
Q: Are photos acceptable for concealed conditions? A: Photos support documentation but do not replace required inspections. Follow the inspector’s guidance.
Build and Inspect With Confidence
Inspections are milestones that confirm your ADU’s quality and safety. With planning, clear documentation, and skilled coordination, each step becomes predictable. Partner with a local team whose daily work involves ADU construction services, and move from foundation to final with assurance that every detail meets code and neighborhood expectations.
Ready for a Smooth Final Sign-Off?
If you want a well-orchestrated build that passes inspections the first time, work with professionals who understand Canoga Park, LADBS, and the nuances of ADU construction. Take the next step with trusted ADU construction experts prepared to guide you from permits to occupancy.