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GoldenStateADU

Timeline reality · Irvine · City of Irvine Community Development

Irvine ADU timeline — phase-by-phase, no fairy tales

Most Irvine ADU contractors quote 6–8 months. Most Irvine ADUs take 11–15 months from first call to keys. Here is the realistic schedule — feasibility, design, City of Irvine Community Development plan-check, construction, and finals — with the specific points where projects slip and how we keep ours on track.

City-specific deep dives

Phase 1 — Feasibility (1–2 weeks)

Survey, APN pull, zoning confirmation, overlay check, utility scoping, rough budget. In Irvine this is where we catch the deal-breakers: hillside overlays, easements, undersized panels, sewer issues. Two weeks is realistic; one week is possible on a clean lot.

Phase 2 — Design & engineering (8–12 weeks)

Schematic design, design development, construction documents, Title 24, structural engineering, MEP coordination. Irvine parcels with overlays or unusual geometry push toward the 12-week end. Weekly homeowner reviews keep this from drifting into 4-month territory.

Phase 3 — City of Irvine Community Development plan-check (12–20 weeks)

Submittal, first-pass review, comment response, second-pass approval, permit issuance. A clean first submittal in Irvine is the single biggest schedule lever — it cuts plan-check from 5 months to 3. Overlays and resubmits drive the variance.

Phase 4 — Construction (20–28 weeks)

Foundation, framing, MEP rough-in, inspections, drywall, finishes, fixtures, final inspections. Irvine construction time is steady; long-pole items are utility upgrades (panel, sewer lateral) and finish lead times. Pre-ordering long-lead items at permit issuance protects this phase.

Phase 5 — Finals, C of O, walk-through (2–4 weeks)

Final building inspection, final MEP inspections, fire clearance, Irvine Certificate of Occupancy, homeowner walk-through, punch-list, keys. We don't call a project done until C of O is in hand and the homeowner has signed the walk.

Irvine · Timeline reality

Questions Irvine homeowners ask about timeline

Direct answers, Irvine-specific.

  1. Can my Irvine HOA stop me from building an ADU?
    No — AB 670 voids HOA prohibitions on ADUs and JADUs. They can require reasonable aesthetic compliance with the village standard.
  2. How long does village review add?
    Typically 4–8 weeks running parallel to city plan-check, not sequential, when packages are designed to the village's published palette.
  3. Does Irvine have unique requirements that affect timeline?
    Yes — City of Irvine Community Development sets the local rules, and Irvine has its own plan-check rhythm. The realistic numbers above reflect 2026 Irvine conditions, not statewide averages.

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