The Quick Read: It depends, and the answer is yes only when you are self-employed, hold real equity today, can carry a larger payment on the whole new loan, and do not need the unbuilt unit’s rent to qualify, because the lender sizes the loan on what the home is worth now.
- A lender values the home as it stands, so an accessory dwelling unit (ADU) that does not exist yet adds nothing to the loan amount.
- The loan is reviewed around documented income from your bank deposits, not on the future rent.
- On a primary residence, a cash-out typically tops out at 80% loan-to-value (LTV), or 75% on the accountant-prepared expense route, subject to lender guidelines.
- A cash-out replaces your entire first mortgage, so a low existing loan is the most common reason to say no.
- Many investors do better with a two-step plan: fund the build, then refinance once the unit is finished and rented.
Why the Answer Is Narrow
A bank statement cash-out refinance sizes itself on today’s appraised value. Your plans for the property do not enter that number.
Say you want to add a detached backyard unit. The appraiser values the home as it is. No new unit, no added value, no added rent. Whatever the finished ADU might be worth later, none of it helps the loan that pays for it.
That timing is why ADU financing often feels harder than buying a property with an ADU already on it. When you buy a finished unit, the value and the rent are already there. When you build, you pay first and earn later.
The second reason is the income method. Bank statement income qualifies you as a borrower. It looks at your deposits, not at what the property earns. So the loan answers one question: can you carry the payment on the full new balance from your documented business or personal cash flow?
How the Loan Works, Step by Step
Across the wholesale network Lendmire works with, the process looks much the same from program to program.
1. Income documentation. The lender reviews 12 months of business or personal bank statements instead of tax returns. Income comes from deposit averages, and lenders apply their own expense factors to business accounts. No universal formula exists, so two lenders can reach different income numbers from the same statements.
2. Deposit review. Underwriters remove transfers, loan proceeds and other credits that are not income. What remains is averaged across the months.
3. Appraisal. The appraiser values the property in its current condition. This sets the ceiling on how much you can borrow.
4. Sizing. The new loan pays off your first mortgage. Whatever is left, after costs, comes to you as cash.
5. Use of proceeds. You receive a lump sum at closing. You then pay the architect, the permit office and the contractor from it.
Loan amounts on these programs generally run from roughly $125,000 to $3,500,000. Lenders commonly look for about six months of reserves, meaning cash you could use to cover the housing payment. Everything is subject to lender guidelines and individual underwriting.
Which Limit Hits First: Equity or Income?
Two limits apply at once, and you only get the smaller one. The first is equity. The second is documented income. Most borrowers hit one of them before the other.
The equity limit is set by LTV. On an owner-occupied cash-out, a primary residence typically reaches up to 80% LTV with a fixed expense ratio, or up to 75% when an accountant prepares the ratio. That accountant route is the lower ceiling, not the higher one. A second home generally tops out at up to 75% LTV. An investment property cash-out tops out around 75% LTV.
You may have seen a 90% figure for primary residences. That applies to purchases and rate-and-term refinances, not to cash-out. Do not plan an ADU budget around it.
The income limit is about the whole new payment, not just the ADU piece. Your deposits have to support the payment on the entire balance. Self-employed owners who write off heavily often find the income number lower than expected, because the lender applies an expense factor to deposits.
In practice, high-equity borrowers with modest income hit the income limit first. Newer owners with strong income hit the equity limit first.
When It Makes Sense and When It Doesn’t
| Factor | Usually a fit | Usually not a fit |
|---|---|---|
| Existing first mortgage | Existing loan is unremarkable, so replacing it costs little | You hold a very low existing loan you would be giving up |
| Equity | Large cushion after the new balance | Thin equity after the cash-out ceiling |
| Income | Self-employed, steady deposits | Deposits uneven or mostly transfers |
| Build size | Large or detached unit | Small project a smaller loan could cover |
| Payment tolerance | Comfortable with a bigger payment | Tight even before the build |
A short rule of thumb: if the build is small relative to your equity, you do not need to reprice your whole mortgage to pay for it. If the build is large and the existing loan is unremarkable, a cash-out is cleaner than juggling several smaller products.
A Worked Example in Percentages
Take a self-employed owner with a primary residence. Assume the first mortgage equals 55% of the appraised value. At the 80% cash-out ceiling, the new loan can reach 80% of value. That leaves a share of value available as cash, before closing costs. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
On the 75% accountant-prepared route, the same owner has up to 20 points. Closing costs come out of that cushion. So does any budget buffer you want for overruns.
Now test the income side. The payment on a new 80% loan applies to the whole balance, not just the 25 points you took out. If your deposits support it, the loan can work. If they do not, you size down or change the plan.
These are modeled assumptions, not market data. Your numbers will depend on your appraisal, credit profile and lender program.
How Does It Compare With the Alternatives?
| Option | How funds arrive | First mortgage | Main tradeoff |
|---|---|---|---|
| Bank statement cash-out | Lump sum at closing | Replaced | Whole loan reprices |
| HELOC | Draw as needed | Left alone | Income documentation varies |
| Home equity loan | Lump sum | Left alone | Second payment on top |
| Construction or renovation loan | Staged draws | Often replaced | Draw process, more oversight |
| Investor rent-based refinance | Lump sum | Replaced | Needs a rentable, non-owner-occupied property |
A HELOC or home equity loan leaves your first mortgage alone. If your existing loan is very low, that matters more than any other factor in this table.
For contrast, Freddie Mac publishes an ADU fact sheet showing that its renovation product can fund building or renovating an ADU. That is an agency route built around conventional documentation. Self-employed borrowers whose tax returns understate cash flow often cannot use it, which is where bank statement programs come in.
Does the ADU’s Future Rent Count?
No. Not on this loan. A bank statement cash-out is reviewed around documented income under the applicable program, subject to lender guidelines. The appraiser values what exists today, and an unbuilt unit has no rent.
The finished unit helps later. A rent-based refinance looks at the appraiser’s market-rent opinion, and that opinion can reflect both units once the ADU is built, permitted and rented. Appraisers use a single-family rent schedule for one unit and an operating income form for two to four units.
Short-term rental plans need care. The single-family rent schedule appraisers use supports long-term rent only, so it cannot back up nightly-rental income. Short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected rental income.
An unpermitted unit is worse. Appraisers tend to flag it and leave it out of value and income. A permitted, legal unit is the one that counts.
Getting the Cash to the Contractor
A cash-out pays one lump sum. A build spends money in stages. The gap between those two is where problems start.
Plan around three points:
- Idle cash. Money sits in your account while design and permits move along. That cash is already costing you interest on the larger loan.
- Order of costs. Permit fees, plans and site work come first. Cover them before closing if you can, so you size the loan on real quotes.
- Overruns. Builds run over. Leave a buffer inside the loan amount rather than counting on a second source.
A construction or renovation loan releases money in draws as work finishes, which matches the spending pattern better. The tradeoff is more oversight and a stricter process. For a large detached unit, that structure may suit you better than a lump sum.
Build Now, Refinance Later
The strongest plan for many investors is two steps. Step one funds the build from equity. Step two is a permanent refinance after the unit is finished, permitted and rented.
A DSCR loan, which qualifies primarily on property-level rental income covering the payment, subject to lender guidelines, is the usual step-two product. It cannot fund raw construction, because the property has to be rentable at closing. Sub-1.00 coverage programs exist through select lenders in the network, though leverage and terms adjust. The complete DSCR loans guide walks through how that works.
One catch matters. DSCR loans are designed for non-owner-occupied investment properties. If you live in the home, you do not qualify for DSCR on it. The two-step plan fits a rental you already own, or a home you plan to move out of.
If the property already has a permitted ADU, the picture is simpler. The appraiser can count that unit in today’s value, so it can support a larger loan now. An unpermitted unit is usually left out, as covered above.
Which Disclosure Rules Apply
Occupancy decides this. A bank statement loan on your owner-occupied home is a consumer mortgage, so consumer disclosure rules, including TRID, apply. Lender ability-to-repay review also applies to that file.
A loan on a non-owner-occupied rental, including a short-term rental, is business-purpose and exempt from TRID. Regulation Z’s ability-to-repay rule does not apply to credit extended primarily for a business purpose, even if a dwelling secures it. The stated purpose and occupancy of your file determine which side you land on, so never mix the two.
Lendmire arranges owner-occupied bank statement loans in 16 states, so availability depends on where the home sits.
Key Terms Defined
Accessory dwelling unit (ADU): A separate living space on the same lot as a main home, such as a backyard cottage, garage conversion or basement unit.
Cash-out refinance: A new, larger mortgage that pays off your old one and gives you the difference as cash.
Bank statement loan: A mortgage that is reviewed around average deposits over 12 months of statements instead of tax returns.
Expense factor: The share of business deposits a lender treats as operating costs rather than income.
Loan-to-value (LTV): The loan balance divided by the property’s appraised value.
DSCR: Debt service coverage ratio, a measure of whether a property’s rent covers its monthly debt payment.
What to Prepare Before You Ask
Lenders in the network want the same few things, so gather them first:
- 12 months of business or personal bank statements, with deposits you can explain.
- Your current mortgage statement and a list of any other debts.
- Proof of ownership and the property’s current condition.
- Reserve funds, commonly about six months of the housing payment.
- Plans, permits and contractor bids, even though the lender will not count the unbuilt unit.
A broker who shops several wholesale lenders can match your deposits, equity and goals to the program that treats them best. That matters because expense factors and overlays differ from lender to lender.
Frequently Asked Questions
Can I use a bank statement cash-out refinance on a home I plan to build an ADU on?
Yes, in the sense that proceeds are generally yours to spend as you choose. The lender sizes the loan on the current appraised value and your documented income, not on the ADU. Approval depends on lender guidelines, credit and the property.
Will the future rent from the ADU help me qualify?
No. The unit does not exist at closing, so there is no rent to count. A rent-based refinance later can use the appraiser’s market-rent opinion once the unit is built and rented.
How much equity can I take out?
On an owner-occupied primary residence, cash-out typically reaches up to 80% LTV, or 75% with an accountant-prepared expense ratio. A second home reaches up to 75%. Investment property cash-out tops out around 75%. Closing costs and reserves reduce what you can spend on the build.
Is a HELOC better than a cash-out refinance for an ADU?
When your current mortgage is low, often yes, because a HELOC leaves it alone. A cash-out replaces the whole first loan. A cash-out wins when you want a single loan, a large lump sum or a fixed structure.
Can a DSCR loan pay for the build itself?
No. A DSCR loan needs a property that can be rented at closing, so it works better as the loan you take after the ADU is finished. It also only fits non-owner-occupied properties.
Next Step
If you are self-employed and want to see how the numbers work, Lendmire can help you compare bank statement loan options based on your deposits, the property, credit profile, leverage, and your goals. Reach the team at 828-256-2183 or request a quote.
For how equity extraction works on an investment property, see Lendmire’s guide to cash-out refinance on an investment property.
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.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
2. Class Valuation: Appraisal Form 1007 and short-term rentals
This article is part of Lendmire’s bank statement loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Does a Bank Statement Cash-Out Refinance Make Sense to Invest in the Stock Market? · Can You Get Approved for a Bank Statement Cash-Out Refinance When the Appraisal Is Low? · How Lenders Underwrite a Bank Statement Cash-Out Refinance With a 50% Expense Ratio
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.