How to Convert Your Garage into an ADU: Step-by-Step Guide
If you’re looking to transform your garage into an Accessory Dwelling Unit (ADU) in Southern California, you’ve come to the right place. At Sky Cloud we believe in the power of ADUs and we feel every homeowner could benefit. Although, we do not take on garage conversion builds, we have the experience to guide you through the process. Our free, detailed instruction guide is perfect for DIY enthusiasts ready to take on their own ADU garage conversion project. Please note: All ADU builds differ. Your build may require more or less steps. This guide is to be used as a helpful tool to provide you structure for your own ADU garage conversion research.
1. City Regulations
Visit your local city planning department to understand the specific regulations and restrictions for garage conversion ADUs. Each city in Southern California has unique requirements.
2. Garage Photos
Take comprehensive photos of your garage, both interior and exterior, to document its current state.
3. Measurements
Measure the dimensions of your garage, including both the interior and exterior, to plan your ADU layout accurately.
4. Footings Check
Ensure that your garage has adequate footings to support the new structure.
5. Initial Layout
Draft a rough layout of your desired garage conversion, including room divisions and placements.
6. Design Sketch
Create a sketch of your design or use free online software to make a more precise plan.
7. Architect and Engineering Plans
Hire an architect to draft the official plans, conduct structural engineering, complete Title 24 requirements, and coordinate with the fire department and other necessary agencies. Plan for at least two revisions.
8. Permit Approval
Once your plans are approved, pay the necessary fees and obtain the owner-builder permits.
9. Site Preparation
Start with site preparation, which includes demolition, trenching, and foundation work.
10. Rough-Ins
Install rough plumbing and electrical systems.
11. First Inspection
Schedule an inspection to ensure your rough-ins are up to code.
12. Backfill and Concrete
Backfill the trenches and pour concrete.
13. Second Inspection
Have an inspection to approve the backfill and concrete work.
14. Framing
Construct the framing for your new ADU.
15. Framing Inspection
Get an inspection to confirm the framing meets all requirements.
16. Mechanical Systems
Install plumbing, electrical systems, mini split HVAC units, bathroom exhaust fans, and kitchen stove vents.
17. Systems Inspection
Another inspection to check the mechanical systems.
18. Windows and Sheathing
Install windows and apply sheathing to the exterior.
19. Sheathing Inspection
Schedule an inspection to ensure proper installation of windows and sheathing.
20. Exterior Waterproofing
Apply waterproofing materials and install chicken wire for stucco application.
21. Waterproofing Inspection
Have an inspection to verify the exterior waterproofing.
22. Stucco and Insulation
Apply exterior stucco and install interior insulation.
23. Insulation Inspection
Conduct an inspection to check the insulation work.
24. Drywall and Waterproofing
Install drywall and waterproofing for the bathroom.
25. Drywall Inspection
Schedule an inspection for the drywall installation.
26. Interior Finishes
Complete the interior finishes, including painting, flooring, kitchen cabinets, tile work, electrical finishes, plumbing finishes, and mini split installations.
27. Final Inspection
Schedule the final inspection to ensure all work complies with code.
28. Final Touches and Move-In
Complete any remaining touches and prepare for the final move-in inspection. Once approved, your new ADU is ready for occupancy.