Straight answers to the questions homeowners ask first.

Four things: lot size and shape, setbacks and buildable envelope, utility and access constraints, and zoning/overlay rules specific to your parcel. ADUOS pulls each of those from the source and shows what blocks each path.

Four: detached new construction, attached addition, conversion of existing space (like a garage or basement), and Junior ADUs. Each has different rules and fits different lots. We rank them for your address, not the other way around.

Front setback violations, rear setback conflicts with existing structures, minimum lot coverage overages, easement conflicts, and crane-access constraints. These are the top 5 by frequency in our San Jose data — your parcel may surface others.

It can tell you whether the code allows one and whether your lot has the ceiling height on record. It cannot tell you whether your foundation can take it — that needs a site visit, which we'll surface as a Needs review item.

The real answer: likely path, top blockers, needs-review items, and a trust chip on every fact. Not a teaser. If we can tell you whether an ADU is realistic at your address, the free look tells you.

It's a flat, one-time fee for the full decision — compare paths, explain-my-number, biggest surprises, decision export. No subscription, no upsell, revisit forever. $49 is what a 30-minute feasibility consult at a builder would cost if they charged for it.

No. One-time per property. If you own multiple properties, each is its own $49.

If the paid unlock doesn't give you a real decision for your property, email us and we'll refund it. The bar is honest, not pedantic — if you didn't get value, you shouldn't have paid.

Your address (to run the lookup), and optionally your email (to save the case). We don't collect names, phone numbers, birthdays, or SSNs. We don't ask about household income.

No. The execution lane only opens after your paid case closes, and only if a local partner opts in. Builders don't see your address or contact info unless you explicitly share it.

Forever, if you sign in. Indefinitely, until you delete it. If you used ADUOS without an account, your case lives for 30 days and then is purged.

Parcel and zoning data is refreshed from county and city sources on a weekly cadence, and every claim carries a freshness timestamp. When a source is stale (> 90 days) or unknown, we say so.

Verified means a primary source says this is true today — and we link to the source. Modeled means we reasoned from verified facts and conservative assumptions — and the assumptions are shown next to the number as a range, not a point.

For V1 (free), the ADUOS system runs the trust check programmatically against primary sources. For V2 (paid), an ADUOS partner reviews the case before we call anything Verified. For V3 (execution), a local partner reviews the case alongside you.