The Quick Read: A short-term rental with an accessory dwelling unit (ADU) can support a DSCR cash-out refinance, but only when the ADU is legal and its nightly income is documented. The loan is then sized by the lower of two tests: equity and rental coverage. Both tests must clear.
- Cash-out on short-term rental collateral typically tops out around 70% LTV, against about 75% on a standard long-term rental.
- Most programs want a 640+ score and about 12 months of hosting history.
- Coverage on a refinance typically starts at 1.00, measured on the new, larger payment.
- An unpermitted ADU is generally left out of the income, so the main house may have to qualify alone.
- Passing the coverage test is not the same as positive cash flow.
What Is This Loan, Exactly?
A DSCR cash-out refinance replaces the current mortgage with a larger one and pays the difference to the owner. DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. The property qualifies primarily on property-level rental income covering the payment, subject to lender guidelines.
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Adding an ADU changes the file in three ways. It may add income. It adds a legality question. And it raises a classification question: is this one property or two units? Across the wholesale network Lendmire works with, those three issues drive most of the back-and-forth on these files. For the full program picture, see the complete DSCR loans guide.
Key Terms Defined
ADU (accessory dwelling unit): A second, smaller dwelling on the same parcel as the main house, such as a backyard cottage, garage conversion, or guest house.
DSCR (debt service coverage ratio): Monthly rent divided by the full monthly obligation: principal, interest, taxes, insurance, and any HOA dues.
Seasoning: The time you have owned the property before a cash-out is allowed. About 6 months is the common expectation.
Hosting history: The record of nightly bookings, usually 12 months, that shows the property earns what you say it does.
Form 1007 and Form 1025: Appraisal forms for rent. The 1007 is the one-unit rent schedule. The 1025 is the 2-4 unit income report.
How Does Underwriting Treat the ADU, Step by Step?
Underwriting follows the same sequence on almost every file.
Step 1: Legality. The reviewer first asks whether both the ADU and the short-term use are legal. Expect to supply a permit, a certificate of occupancy, or other proof the use is allowed. Agency rules offer a useful contrast here. Freddie Mac’s ADU fact sheet says the ADU must be allowed under zoning and that rental income from an illegal ADU may not be used to qualify. That is an owner-occupant agency rule, not a DSCR rule. DSCR programs set their own terms, but the logic carries over: income from a unit that cannot legally be rented is hard to count.
Step 2: Appraisal. One appraisal produces two opinions: market value and a rent opinion. The standard rent schedule has a limit. Fannie Mae’s appraiser guidance says the 1007 reflects monthly market rent from comparables leased monthly, cannot estimate a nightly fee, and that multiplying a nightly rate by 30 is incorrect. McKissock makes the same point: the form shows monthly rent for a one-unit property, and the lender decides what income to use. Those are agency form rules, but the forms show up on DSCR files too.
Step 3: Proving nightly income. Programs typically accept some mix of these:
- 12 months of platform or property-manager history
- A bank-statement tie-out to the payouts
- A market data report projecting income
- An appraiser’s short-term rental analysis
- A fallback to long-term market rent
Lenders in the network differ on which they favor. Some lean on trailing history, others accept a market projection, and a few fall back to the appraiser’s long-term rent when history is thin.
Step 4: Haircut. Many reviewers shave gross nightly income before testing coverage. Only the income side shrinks. The payment stays whole. The network’s own floor on a short-term rental refinance is 1.00, measured on the income the lender actually counts.
Step 5: Sizing the loan. The loan is the lower of two numbers. The value test is appraised value times the leverage cap, around 70% on short-term rental cash-out. The coverage test is rent divided by the payment on the new loan. On many short-term rental files, coverage binds before equity does. Cash-out is the new loan minus the payoff, costs, and reserves.
Step 6: Seasoning and reserves. About 6 months of seasoning is the common expectation on cash-out. Reserves vary by lender, leverage, and loan size, commonly around 6 months of PITIA, with larger loans stepping up.
Which Requirements Apply to Short-Term Rental Cash-Out?
| Factor | Short-term rental cash-out | Standard long-term rental cash-out |
|---|---|---|
| Max LTV | Around 70% | Around 75% |
| Credit score | 640+ | Around 660 typical; 620 floor in parts of the network |
| Coverage floor | 1.00 on a refinance | 1.00 where select programs start |
| History | About 12 months hosting | Lease or market rent |
| Loan size | Up to $3,000,000 | Up to $3,000,000 on standard programs |
These are typical ranges from select wholesale-network guidelines, not promises. Qualification remains subject to lender guidelines, credit approval, and property review. One note on coverage: 1.00 is where select programs start, and a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Stronger ratios usually open better pricing and leverage.
Manufactured homes, log homes, and barndominiums are not offered in the network’s DSCR programs, so an ADU built in one of those styles is a non-starter.
What Happens to an Unpermitted or Non-Conforming ADU?
An unpermitted ADU is generally excluded from income, so the main house may have to qualify on its own. Appraisers also tend to treat these units cautiously. One Portland appraisal practitioner notes that an ADU’s square footage cannot be added to the main home’s, and that unpermitted units rarely earn the value premium permitted ones do.
A legal non-conforming ADU sits in the middle. It may stay in use, but with limits, and the status can lapse in some jurisdictions. Get the facts from the jurisdiction in writing, not from the seller. 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.
Where the General Rule Breaks
The steps above hold for most files. These edge cases bend them.
- One unit or two? An ADU may be reported inside a one-unit appraisal or treated as a second unit, and treatment varies by program. Confirm it before you order anything. If the property is handled as 2-4 units, the 1025 applies. It was built around monthly leases, so it is usually supplemented with nightly comp data or a narrative addendum.
- No hosting history. A brand-new ADU, or a conversion from long-term to short-term, has no 12-month record. Programs then use a projection or fall back to the long-term rent opinion, which can sit well below short-term potential.
- Only one unit is short-term eligible. If the main house is cleared for nightly rental and the ADU is not, the ADU’s income may be counted at long-term rent or dropped.
- Paid-off property. A free-and-clear home is still a non-owner-occupied cash-out refinance if you pull cash.
How Does the Cash-Out Draw Affect Coverage?
Here is the tension most investors miss. Pulling more equity raises the loan, which raises the payment, which lowers coverage. Picture a short-term rental with an ADU that tests near 1.30x on its current loan. A maximum draw might push that toward 1.00x or below, even though equity allows the larger check. The lender then sizes the loan down to what coverage supports.
Run it two ways. First, count both the main house and the ADU. Second, count the main house only, as happens when the ADU is unpermitted. The second case usually shrinks the loan, and sometimes the file fails coverage outright. Stress-test before ordering the appraisal.
If the number lands below 1.00, a sub-1.00 structure is available through select lenders in the network, with leverage and terms adjusted. Qualification is subject to lender guidelines, credit approval, and property review. The better question is whether to use it. If a smaller draw clears comfortably, that is often the cleaner choice.
Does Passing the Ratio Mean Positive Cash Flow?
No. DSCR compares rent to PITIA only. Repairs, vacancy, cleaning, platform fees, furnishing, utilities, management, and capex sit outside the calculation. An ADU adds to that cost load: another unit to clean, stock, insure, and maintain. A file can clear 1.00 and still run thin after real operating costs. Size the draw to the cash you can sustain, not the cash the lender allows.
Which Documents Should You Gather?
- Property: deed, current mortgage statement, insurance suited to short-term use, HOA or covenant confirmation
- ADU: permit, certificate of occupancy or equivalent, any zoning letter
- Operation: 12 months of platform payouts or manager statements, bank statements showing deposits, any local short-term rental license
- Borrower and entity: ID, credit authorization, and entity documents if an LLC holds title, subject to lender program eligibility
- Use of proceeds: a business-purpose declaration, since the loan is for investment
What If the File Does Not Work?
| Problem | Typical response |
|---|---|
| Coverage too low | Smaller draw, or a sub-1.00 path through select lenders with adjusted leverage and terms |
| Under 12 months of history | Projection-based income, or wait and season the record |
| ADU unpermitted | Qualify on the main house alone, or permit the unit first |
| Equity too thin | Lower draw, or hold until value or balance improves |
| Short-term use barred locally | Underwrite on long-term rent |
Frequently Asked Questions
Can I use cash-out proceeds to build the ADU?
Often yes, since proceeds on a business-purpose investor loan are generally yours to use. But the lender sizes the loan on the property as it exists, not on the unit you plan to build. A planned ADU typically does not add income to the file until it is permitted and complete.
Does a brand-new ADU with no bookings count?
It may count through a market projection or the appraiser’s rent opinion, depending on the program. Expect a more conservative number than a unit with 12 months of history. Hosting history of about 12 months is the typical expectation.
What LTV applies to a short-term rental cash-out?
Typically up to about 70% on short-term rental collateral, compared with about 75% on a standard long-term rental. The cap is a ceiling. Coverage often sets the actual loan first.
Is there a limit on how many DSCR loans I can hold?
Not in the way agency loans cap financed properties. Terms are subject to lender guidelines.
Does the appraisal set my loan amount?
No. It sets the leverage ceiling. The coverage test can bind first, which is common on short-term rental files.
Next Step
If you are buying or refinancing a rental property and want to see how the numbers work, Lendmire can help you compare DSCR loan options based on the property income, credit profile, leverage, and investor goals. Reach the team at 828-256-2183 or request a quote. Tax treatment varies; consult a qualified professional.
The ADU is the easy part to love and the hard part to underwrite. Get its permit status in writing before you plan the draw around its income.
For how equity extraction works on an investment property, see Lendmire’s guide to cash-out refinance on an investment property.
About Lendmire
Lendmire is a DSCR-focused mortgage brokerage, NMLS# 2371349, placing investor loans across 41 markets, including Washington, D.C. DSCR eligibility is generally reviewed by the lender around a property’s rental income rather than personal income documentation, which fits LLC-held rentals, self-employed investors, and portfolios scaling past conventional financed-property limits. 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. Fannie Mae Appraiser Update
3. McKissock: Form 1007 and short-term rental appraisals
4. Portland Residential Appraisal: ADU appraisal
This article is part of Lendmire’s investment property cash-out refinance program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Does a DSCR Cash-Out Refinance Make Sense Instead of Selling the Rental? · DSCR Cash-Out Refinance vs Conventional Investor Loan Across Multiple Rental Properties · Is DSCR Cash-Out Worth It Over Agency on a 2–4 Unit Rental?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.