How Much ADU Rent a Bank Statement Loan Counts Without a Permit

The Quick Read: On a bank statement loan, unpermitted ADU rent usually counts for little or nothing, because the program reviews your file on your deposits and not on what the property earns. Where property rent does matter, as on a DSCR file, the appraiser’s legal-use call sets the rent the lender will use, and an unpermitted unit is typically left out. No sourced percentage exists for how much unpermitted rent counts, so treat any promised figure with suspicion.

• A bank statement loan is reviewed on documented income under the applicable program, subject to lender guidelines. The deposit average does the work.
• Rent from an unpermitted unit is not rent used for lender review just because it lands in your account.
• The appraisal decides whether the ADU is legal, legal non-conforming, or unpermitted.
• Underwrite the deal on the main house alone. Anything the ADU adds is a bonus.
• Ask the lender about permit status before the appraisal is ordered, not after.

The title of this article carries a premise that needs correcting first. Bank statement loans and ADU rent are tested by different mechanics, and mixing them up is where most borrowers go wrong. The sections below take the file apart in order.

What Does a Bank Statement Loan Actually Test?

A bank statement loan tests your deposits. Across the wholesale network, lenders take 12 months of business or personal bank statements, average the deposits, and apply a lender-specific expense factor to get qualifying income. The property’s rent is not the coverage figure. Your cash flow is.

That split matters for ADU owners. On a DSCR loan, the property’s rent has to cover the payment, so every dollar of rent is a line item the underwriter questions. On a bank statement file, the property rent is typically secondary. Your deposits carry the file. Lendmire’s complete DSCR loans guide covers the rent-based side in detail.

Whether tenant rent deposited into your account counts as part of the deposit average is a program-guideline question. It varies by lender. Some will screen it out as non-business income. Others will allow it if it is documented and consistent. No single rule applies across programs, and no neutral published source settles it. That is why the lender conversation comes before the appraisal.

Leverage also depends on occupancy. On a primary residence, bank statement programs reach up to 90% LTV on a purchase or rate-term refinance through select lenders. On an investment property, cash-out tops out around 75% LTV, and investment purchase leverage on bank statement documentation varies by lender. Qualification is subject to lender guidelines in every case.

How Does the Appraisal Treat an Unpermitted ADU?

The appraisal is where unpermitted rent dies. The appraiser decides whether the ADU is legal, legal non-conforming, or unpermitted, and whether it counts in the gross living area. Reporting from an ADU education site says unpermitted ADUs usually add little or no value at appraisal, and that some lenders require legalization or removal before they will proceed. Rent from the unit is not counted.

A second education site says appraisers must note unpermitted structures. Most will not assign value to unpermitted improvements, and the unit can read as a liability instead of an asset.

The rent schedule works the same way. The standard form is the market rent schedule, which asks the appraiser to estimate monthly market rent from comparable rentals. That form is only the appraisal vehicle. It does not govern non-QM eligibility. The lender’s own program sheet does.

Here is the catch. If the appraiser bases market rent on the legal configuration only, income is capped there, even if the tenant actually pays more. Cash collected is evidence. It is not the number.

How Underwriting Handles the File, Step by Step

On most files placed through the network, the sequence runs like this.

1. Pick the test. Bank statement files qualify on deposits. DSCR files qualify on property rent. The ADU matters mainly in the second case.

2. Order the appraisal with the rent schedule. The appraiser reports the legal-use status and a market rent estimate based on comparable rentals.

3. Apply the legal-use call. A legal or legal non-conforming unit may carry rent into the file. An unpermitted unit is typically excluded from both value and rent.

4. Select the rent figure. Depending on the program, the lender uses the lease, the market rent from the appraisal, or the lower of the two. Program sheets differ here.

5. Test the deal without the ADU. If coverage or income only works with the unpermitted rent, the file is built on sand.

6. Collect the supporting documents. Typically that means the appraisal with rent schedule, any lease, permit or certificate of occupancy evidence, plus insurance and title facts.

Most files that stall do so at step 3. The borrower assumed the rent would count, and the appraiser said otherwise. Underwriters conservative about collateral will not argue, since they have to think about the case where they must take the property back and operate it.

Structures and Variations

Three structures come up on ADU files.

Asset depletion is the quiet alternative. It qualifies from liquid assets, runs to about 80% LTV on a primary residence, and ignores ADU rent entirely. For a borrower whose deposits are thin but whose balance sheet is strong, it removes the permit question from the income side. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.

Loan sizes on the bank statement side run roughly $125,000 to $3,500,000, with reserves commonly around 6 months of the housing payment. Both apply across occupancy types, subject to lender guidelines.

Occupancy also decides the disclosure regime. An owner-occupied bank statement file, whether a primary residence or second home, is a consumer mortgage. A bank statement loan on a non-owner-occupied rental is business-purpose and exempt from consumer mortgage disclosure rules. The two should never be mixed up on the same file. The brokerage’s coverage for the consumer side spans 16 states, so availability depends on where the property sits.

Where the General Rule Breaks

The rule “unpermitted means zero” has edge cases.

Rent from an illegal ADU may not be used to qualify under agency guidelines, which also ask for at least one comparable sale with an ADU and three comparable rentals, one of them a rented ADU. That is agency contrast only. Non-QM programs set their own terms, and some draw the legal non-conforming line differently.

Comparables can sink a permitted unit. Even a legal ADU can be excluded when the appraiser cannot find nearby ADU comparables. This is a collateral issue, not a permit issue, and it catches owners in thin submarkets.

Rent comps blur. Appraisers often do not separate ADU rent comps from detached single-family comps. A permitted ADU may get a market rent figure that looks too high or too low for the unit.

Cure paths exist. An unpermitted unit may prompt the lender to ask for permit verification or legalization. If the owner can legalize, the file may move. If the legalization process is open-ended, the purchase contract may not wait.

Owner-occupancy changes the frame. DSCR is for investment property only. Bank statement loans can cover owner-occupied homes. An owner who lives in the main house and rents an unpermitted ADU is on the bank statement side, where the ADU deposits are a program-guideline question.

Cash-out has its own ceiling. On an owner-occupied primary, bank statement cash-out reaches up to 80% LTV with a fixed expense ratio, or 75% with an accountant-prepared ratio. A second home tops out around 75%. The 90% figure is a purchase and rate-term ceiling only. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.

The Investor Decision in Practice

Say you own a house with a garage conversion that has no permit. You rent it informally and the deposits hit your account every month. You want to refinance on a bank statement program.

First, assume the ADU rent does not count. Underwrite the file on the main house and your other deposits. If that works, the ADU is upside. If it does not, you are depending on income the lender may not recognize.

Second, ask the lender directly whether tenant rent deposited into your account is treated as qualifying deposits under the program. Get the answer before the appraisal is ordered.

Third, keep a record. Written leases, a consistent payment method, and a clean deposit trail help any lender that does consider the income. They also protect you if the unit is ever questioned.

Buying is a different test. Unpermitted units often go unnoticed for years until a code complaint or a permit pulled for other work exposes them. Plan for that. Unpermitted units are common in some markets, and the pool of buyers willing to take them is smaller than the pool for clean properties, which affects your exit.

For the leverage side of owner-occupied bank statement files, Lendmire’s piece How to Get a Super Jumbo Bank Statement Loan Without Selling Stock walks through the larger-loan mechanics.

Common Misconceptions

Rent in the bank equals rent used for lender review. No. Depending on the program, lenders use the lease, the appraisal’s market rent, or the lower of the two, not simply what you collect.

A bank statement loan lets me count ADU rent from my deposits. Not automatically. The program tests deposits, and whether ADU deposits count is a guideline question that varies by lender.

Zoning allows ADUs, so mine counts. The unit still has to be legal, supported by the appraisal, and eligible under the program.

The rent schedule settles it. It estimates rent from comparables. It does not decide legality.

Unpermitted just means a haircut. Practitioners more often see exclusion. Some programs decline the property outright.

Key Terms Defined

ADU: An accessory dwelling unit, a second living space on the same lot as the main house, such as a garage conversion, basement suite, or backyard cottage.

Bank statement loan: A mortgage that is reviewed on documented income from 12 months of deposits instead of traditional personal-income documentation, subject to lender guidelines.

Expense factor: The percentage of deposits a lender treats as business expenses when turning deposits into qualifying income.

Legal non-conforming: A unit built legally under past rules that no longer match current code, typically treated more favorably than an unpermitted one.

Market rent: The monthly rent the appraiser estimates from comparable leased properties.

DSCR: Debt service coverage ratio, property rent divided by the full monthly obligation, used on investor loans.

Tax treatment can depend on how the funds are used and how the property is held; borrowers should keep clear records and speak with a qualified tax professional before relying on any deduction.

About Lendmire

Lendmire, NMLS# 2371349, is a mortgage brokerage with consumer lending licenses in 16 states. Bank statement, P&L-only, 1099-only and asset-based mortgages are arranged through wholesale lending partners for borrowers whose tax returns understate their income, and each application is reviewed individually by the lender. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. ADU Home Resource

2. GatherADU