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GoldenStateADU

Timeline reality · Mountain View · City of Mountain View Community Development

Mountain View ADU timeline — phase-by-phase, no fairy tales

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

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

Mountain View · Timeline reality

Questions Mountain View homeowners ask about timeline

Direct answers, Mountain View-specific.

  1. Do Mountain View standard plans save real money?
    Yes — they cut design fees by $8K–$15K and plan-check by 4–8 weeks when parcel conditions match.
  2. Can my Mountain View ADU connect to existing electrical?
    Often yes if the panel is 200A. We confirm capacity calculation at feasibility.
  3. Does Mountain View have unique requirements that affect timeline?
    Yes — City of Mountain View Community Development sets the local rules, and Mountain View has its own plan-check rhythm. The realistic numbers above reflect 2026 Mountain View conditions, not statewide averages.

Continue researching Mountain View

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