ADU Process & Timeline
A typical ADU project takes 10–14 months from planning to move-in. Timelines vary based on permit processing times, site conditions, and project complexity.
Project Timeline Overview
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Cumulative
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Planning & Permitting
16 weeksFeasibility study, design development, plan check submission, and permit approval.
Site Preparation
3 weeksDemolition, grading, excavation, and utility locating.
Foundation
3 weeksForming, pouring, and curing the concrete foundation or slab.
Framing & Structural
5 weeksWall framing, roof structure, sheathing, and structural inspections.
Exterior & Waterproofing
5 weeksWindows, doors, roofing, stucco or siding, and waterproofing membrane.
MEP (Mechanical, Electrical, Plumbing)
6 weeksRough-in plumbing, electrical wiring, HVAC ducting, and inspections.
Interior Finishes
12 weeksInsulation, drywall, flooring, cabinetry, tile, paint, and fixture installation.
Touch Up & Clean
7 weeksPunch list items, final inspections, deep clean, and certificate of occupancy.
Payment amounts are calculated from your project estimate. Visit the ADU Cost Estimator to see dollar amounts based on your specific project details.
Deposit
Week 1$500 depositDue at contract signing to begin the design process.
Plans Complete
Week 8Due when architectural drawings are approved and ready for permit submittal.
Permit Issued
Week 16Due when the building permit is issued and construction is ready to begin.
Framing Complete
Week 24Due when structural framing passes inspection.
Rough-In Complete
Week 32Due when all rough mechanical, electrical, and plumbing pass inspection.
Final Completion
Week 48Due at final inspection and certificate of occupancy.
Ready to Get Started?
Every project is unique. Request a free feasibility study and we'll walk you through what your specific timeline looks like.