Tenant screening for your Bay Area ADU: the checklist I actually use

A Sunnyvale landlord I work with sent me four ADU applications last Sunday night with the subject line "pick one." I sent back the same four with a different subject line: "pick none, here's why." Three of the four had failures the listing photos never would've shown. The fourth had a credit issue the soft-pull missed entirely.

The screening process I run today is the result of about 30 specific mistakes — some mine, most learned from clients who tried to shortcut the work. Most of those mistakes happen at the application-intake step, before a credit check is even pulled.

After 12 years and 200-plus ADU placements across the South Bay, here's the actual checklist.

The application form

What I require on the application:

• Full legal name plus current address plus 24-month address history
• Employer name, role, length of tenure, gross monthly income
• A 60-day bank statement for income verification, or the two most recent pay stubs for W-2 employees
• Prior landlord contact info for at least the two most recent tenancies
• Three personal references (not family)
• Photo ID
• Co-applicant or guarantor information if applicable
• Pet information including breed, weight, age, and any service-animal documentation separately
• Signed authorization to run credit and background checks

The single biggest difference between my form and the generic ones most ADU landlords use: the 60-day bank statement requirement. Pay stubs can be photoshopped. Bank statements showing actual deposits hitting the account can't, or rather, the effort to fake them is high enough that almost no applicant tries. I've caught four income misrepresentations over the years through this one piece of documentation that pay stubs alone would've missed.

Credit thresholds

The minimum I tell ADU owners to set: 680 for a clean approval, 640-680 with a guarantor or larger deposit, below 640 generally a decline.

This is not as strict as it sounds. The South Bay ADU tenant pool skews toward stable, employed professionals. Most qualified applicants come in at 720+. The 640-680 band is where the actually-interesting screening happens, where applicants who've had a single life event (divorce, medical, recent immigration) but are otherwise creditworthy show up.

What matters more than the score itself: length of credit history (under 24 months is a yellow flag, not a red flag), number of recent collections or judgments (one or two small ones from years ago is fine; recent ones are a much higher bar), debt-to-income ratio (above 40% is concerning; above 50% is usually a decline), and any landlord-tenant judgments in the public record. That last one is the variable that actually predicts future problems.

I use Experian RentBureau through a tenant-screening vendor. Most ADU owners use one of: TransUnion SmartMove, Experian Connect, MyRental, or similar. The differences between these are small. Pick one and stick with it.

Income verification

The standard test: gross monthly income at least 3x the monthly rent. For a typical South Bay ADU at $3,200/month, that's $9,600/month gross, or roughly $115,000/year.

Where this gets nuanced:

For 1099 and contract workers (common in the Bay Area), I require 12-24 months of tax returns and the 60-day bank statement instead of pay stubs. Contractors who can't produce both are usually contractors who shouldn't be your tenant.

For equity-rich, W-2-light applicants (common in tech), I accept a CPA letter or a brokerage statement showing liquid assets equal to or greater than 12 months of rent. Some tenants are intentionally W-2-light because they're living on RSU vests, capital gains, or 1099 consulting. Treating these applicants as unqualified because their W-2 looks small is a real mistake, and one I've watched cost ADU owners qualified tenants.

For applicants with no U.S. credit history at all (often new arrivals on L-1, H-1B, J-1, or O-1), the alternative documentation I accept: 12 months of bank statements from any country, the employer's offer letter or assignment letter on company letterhead, a copy of the visa with start date, and either an employer-paid security deposit equivalent to 2-3 months of rent or a U.S.-based co-signer with established credit. About 15-20% of my ADU placements each year go this route. The screening is more paperwork-intensive but the resulting tenancies are typically excellent.

Prior-landlord reference calls

This is the step most owners skip. It's also the one that produces the most signal.

I call at least two prior landlords for every applicant. Not email. Call. The script:

1. "I'm calling to verify a previous tenancy. Can you confirm [applicant name] rented from you between [dates]?" 2. "Was the rent paid on time?" 3. "Was the property returned in good condition at move-out?" 4. "Would you rent to them again if they came back?" 5. "Anything you'd want a future landlord to know that I haven't asked about?"

Question 3 filters out polite lies. Question 4 is the highest-signal one; landlords who hedge on this are telling you something. Question 5 is where the genuinely useful information comes out.

If a prior landlord is unreachable, that's not automatically a problem. People move, retire, sell properties. If two of two prior landlords are unreachable, that's a yellow flag, and the applicant should be able to produce at least one verifiable reference.

The one trap: applicants sometimes list a relative or a friend as the prior landlord. I cross-check the address against public records and the listed landlord name. If the names don't match what's on the deed or property records, I push back politely. About 5% of the time, this catches a fabricated reference.

Background checks

The three components I run on every applicant: a national criminal records search (federal, state, county where the applicant has resided in the past 7 years), a sex offender registry check (national and California), and an eviction history search (PACER plus the screening vendor's eviction database).

What I do with what comes back: minor misdemeanors over 7 years old generally don't change my decision. Felonies, recent misdemeanors, and any eviction filing within the past 5 years require a deeper conversation with the applicant and, often, a decline.

California's fair-housing law (FEHA) and the federal Fair Housing Act limit what you can use to reject an applicant. A blanket "no criminal history" policy is illegal. A specific, individualized assessment is required. This is where the legal landscape matters and where ADU owners get into trouble. If you reject an applicant based on a criminal record without a documented individualized assessment, you're exposed to a fair-housing claim. The standard I follow: nature of the offense, time elapsed, evidence of rehabilitation, and direct relevance to the tenancy. Every rejection gets a written justification in my file.

Section 8 voucher applicants

California SB 329 (effective 2020) made source-of-income discrimination illegal. ADU owners cannot reject an applicant solely because they're paying with a Section 8 housing choice voucher. Yes, this applies to ADUs.

What you can still do: apply the same credit, income, and background screening standards you apply to other applicants. The voucher counts as income for the income calculation. The housing authority signs a lease addendum, and the inspection happens before move-in.

Practical note: Section 8 inspections in Santa Clara and San Mateo counties typically clear in 2-3 weeks. If your ADU passes a state HCD inspection, it'll almost certainly pass the Section 8 inspection. The paperwork load is heavier than a market-rate tenancy but the tenancies tend to be stable.

Fair-housing pitfalls

The questions I never ask on an application or in a conversation: marital or family status, whether the applicant has children or plans to have them, national origin or immigration status (beyond what's needed to verify income and work authorization), religion, disability status (you can ask about pets or service animals; you can't ask about underlying conditions), age (beyond confirming the applicant is 18+).

What I document on every decline: the specific reason tied to the published screening criteria, the date of the decision, and the documentation that supports it. If a declined applicant later files a fair-housing complaint, the written record is what protects you.

California is one of the most plaintiff-friendly fair-housing jurisdictions in the country. The Civil Rights Department (formerly DFEH) takes complaints seriously. The cost of a poorly-documented decline is materially higher than the cost of taking another two weeks to find the right tenant.

Pulling it together

The screening process I run takes 5-7 business days on average for a fully cooperative applicant. The applicant fills out the form on day one. Credit and background checks return within 24-48 hours. Prior-landlord reference calls take 2-4 days depending on the landlords' responsiveness. Income verification takes a day if documents are clean, longer if anything needs follow-up.

For owners self-managing the ADU, the time investment is real but front-loaded. A bad tenancy that ends in eviction costs 4-8 months of lost rent plus $5,000-15,000 in legal and turnover costs. The 6 hours spent on a thorough screening is the single best preventive investment available.

For owners using a property manager, the screening cost is typically rolled into the tenant placement fee. The 200-plus tenancies I've placed across the South Bay (which I lay out in the full ADU management guide) are the case for why the process above works. The eviction rate across my portfolio is well under 1% per year, and the average ADU tenancy length is 22 months — materially above the South Bay average.

If you're about to list your ADU or you're trying to figure out whether an applicant in front of you is the right fit, request a free ADU rental analysis and I'll walk you through the specific situation. Or call me directly at (408) 813-8001.

Sources

• California Fair Employment and Housing Act (FEHA) — California Civil Rights Department
• Federal Fair Housing Act — U.S. Department of Housing and Urban Development
• California SB 329 (Source of Income Discrimination) — California Legislative Information
• Section 8 Housing Choice Voucher Program — U.S. Department of Housing and Urban Development
• California Civil Code Section 1950.5 (Security Deposits) — California Legislative Information
• Experian RentBureau — Experian