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Permits & plan-check · Pasadena · City of Pasadena Planning & Building

Pasadena ADU permits — what plan-check really looks like

Every Pasadena ADU permit runs through City of Pasadena Planning & Building. This is the realistic, project-manager view of that process — submittal package, plan-check rounds, the comments that come back most often, fees that hit before construction, and what separates a first-pass approval from a five-month round trip.

City-specific deep dives

City of Pasadena Planning & Building submittal package

A clean first submittal in Pasadena includes: site plan with setbacks and FAR calculation, architectural set (floor plans, elevations, sections, roof plan), Title 24 energy compliance, structural calcs and details, MEP plans, and the ADU-specific application packet. Missing any one of these adds two to four weeks of plan-check delay — not because plan-check is slow, but because the package goes back to the design team.

First-pass comments — the predictable ones

Pasadena plan-checkers consistently flag the same items: setback dimensioning, fire-separation details where the ADU is close to the main house, parking math (or its waiver), egress window sizing, Title 24 documentation gaps, and missing structural connection details. A disciplined design set anticipates these. Most second-pass turnarounds are avoidable.

Fees, school fees, and utility connections

Plan-check fee, building permit, mechanical/electrical/plumbing permits, school district impact fee (if applicable), water capacity fee, and sewer capacity fee. In Pasadena, these collectively land between $14,000 and $28,000 depending on ADU size and existing utilities. We model this at feasibility so the homeowner sees a real total, not just construction cost.

How long it actually takes in this jurisdiction

City of Pasadena Planning & Building plan-check averages 3–5 months from submittal to permit issuance in 2026 — assuming a clean package and responsive comments. Hillside, coastal, HPOZ, or special review overlays add 4–10 weeks. We tell the homeowner the realistic window at feasibility, then track it weekly.

Pasadena · Permits & plan-check

Questions Pasadena homeowners ask about permits

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 permits?
    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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