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GoldenStateADU

Timeline reality · Pasadena · City of Pasadena Planning & Building

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

Most Pasadena ADU contractors quote 6–8 months. Most Pasadena ADUs take 11–15 months from first call to keys. Here is the realistic schedule — feasibility, design, City of Pasadena Planning & Building 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 Pasadena 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. Pasadena 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 Pasadena Planning & Building plan-check (12–20 weeks)

Submittal, first-pass review, comment response, second-pass approval, permit issuance. A clean first submittal in Pasadena 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. Pasadena 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, Pasadena 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.

Pasadena · Timeline reality

Questions Pasadena homeowners ask about timeline

Direct answers, Pasadena-specific.

  1. Can I build an ADU in a Pasadena Landmark District?
    Yes — Landmark District ADUs are permitted but require additional design review focused on compatibility with the historic character. We have a documented track record with the process.
  2. How does Pasadena differ from LA City for ADUs?
    Pasadena runs its own building department, has its own historic review, protects mature trees aggressively, and tends to be more deliberate on design — but ministerial approval still applies under state law for compliant projects.
  3. Does Pasadena have unique requirements that affect timeline?
    Yes — City of Pasadena Planning & Building sets the local rules, and Pasadena has its own plan-check rhythm. The realistic numbers above reflect 2026 Pasadena conditions, not statewide averages.

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