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ADU answers
ModeledExecutionReviewed 2026-04-24

San Jose ADU feasibility checklist

A practical checklist for San Jose homeowners before paying for ADU design, builder bids, or deeper feasibility work.

Direct answer

The short version

Modeled

Before you pay for design or builder work, confirm the address, parcel, likely path, top blockers, evidence gaps, and next real step. If those are unclear, the project is not ready for expensive decisions.

San Jose scope

Where this applies

Verified

This checklist is built for San Jose-first ADU screening. It is not a full permit submittal checklist.

ADUOS checks

What we check first

  • Can we match the property to the right parcel?Modeled
  • Do zoning and lot evidence support a first read?Modeled
  • Which ADU path looks most plausible?Modeled
  • What could break the answer?Needs review
  • What should the homeowner verify next?Needs review

What could change this

The answer can move

  • A better parcel sourceNeeds review
  • A professional site visitNeeds review
  • A utility checkNeeds review
  • A designer's early feasibility reviewNeeds review

Source notes

Why the label matters

Modeled

The checklist turns official process and property evidence into a homeowner decision sequence. It should not be presented as permit approval.

FAQ

Common follow-ups

What is the first expensive mistake?
Modeled

Paying for a path that was never realistic for the lot. Start with the address and blockers.

What should be verified before deeper design?
Needs review

Parcel identity, zoning source, lot geometry, likely path, and any Needs review items that could change fit or cost.