The Quick Read: Usually not. On a true cash-out refinance, rent from an accessory dwelling unit (ADU) generally cannot be counted toward qualifying income. The carve-outs sit on purchases and on limited cash-out or no-cash-out refinances, and they come with caps and documentation rules. A homeowner planning a build needs to match the loan type to the plan, because the label “cash-out” decides whether the unit’s income is usable at all.
The reason is simple. Lenders sort refinances into categories, and each category carries its own income rules. Below is how that sorting works, where the exceptions are, and how to decide what to do if a renovation or ADU is the goal.
Why Does the Loan Category Decide Everything?
A “cash-out refinance” is not one product. It is a family of loans, and the rules change depending on how much cash comes back, which liens get paid off, and which program backs the loan.
Across the wholesale programs Lendmire works with, a conventional cash-out refinance on a one-unit principal residence tops out at 80% loan-to-value. Two- to four-unit principal residences, second homes and investment property top out at 75%. Those leverage caps are separate from the income question, but they frame it. Cash-out is the category where lenders ask for the most from the file, so the agencies tend to be strictest about which income they allow.
The rate-and-term (limited cash-out) category is different. The new loan pays off the existing first mortgage, the closing costs and any purchase-money second lien, with only incidental cash back. It reaches 95% LTV on a one-unit principal residence. Fannie Mae’s announcement on ADU rental income draws the line right there: ADU income can count on a purchase or a limited cash-out refinance, and on a one-unit principal residence only. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Here is the catch. A standard cash-out refinance is not on that list. Fannie Mae’s limited cash-out category allows cash back of no more than the greater of 1% of the new loan balance or $2,000. Return more than that, or pay off liens beyond what the category allows, and the loan becomes a standard cash-out. ADU income is then off the table.
What Do Fannie Mae, Freddie Mac and FHA Each Say?
None of the three lets ADU rent help you qualify on a standard cash-out refinance. The details differ, so the table lays out each program.
| Program | ADU income allowed on | Cash-out refinance |
|---|---|---|
| Fannie Mae | Purchase, limited cash-out | Not on the list |
| Freddie Mac | Purchase, no cash-out refinance | Eligible loan, income not usable |
| FHA | Non-cash-out loans | Income cannot be used |
Freddie Mac’s ADU fact sheet says any of its mortgage offerings can finance a property with an ADU, and cash-out refinance is an eligible loan purpose. But ADU rental income can qualify you only for a purchase or a no-cash-out refinance. So the property can be cash-out eligible while the ADU income stays unusable. Lease-based rent counts at only 75% of the lease amount, and rent used for lender review cannot exceed 30% of total qualifying income. Rent from an illegal ADU does not count at all.
On the FHA side, HUD’s Mortgagee Letter 2023-17 clarifies that ADU rental income cannot be used as effective income on cash-out refinances. The same letter confirms that a one-unit property with a single ADU remains a one-unit property.
Fannie Mae’s treatment of ADUs is the one worth confirming file by file. Guidance gets updated, and the practical answer for your loan comes from the lender reviewing it, subject to lender guidelines and full file review.
When Can Unit Income Actually Help?
It can help on a purchase, or on a limited cash-out or no-cash-out refinance, when the property is a one-unit principal residence with a single legal ADU. Each of those conditions is a gate.
- One ADU only. Even if the property has several, only one can supply rental income.
- A 30% ceiling. At both Fannie Mae and Freddie Mac, ADU income is capped at 30% of total qualifying income.
- A legal unit. Freddie Mac bars income from an illegal ADU. Permits and zoning matter.
- A haircut. Freddie Mac counts lease-based rent at 75% of the lease amount.
- A principal residence. Rental income from the home you live in is generally barred from qualifying, with named exceptions for boarders and accessory units.
One point people miss: the rent is added to your qualifying income. It does not reduce the payment. The full housing payment stays in the debt-to-income calculation. Fannie Mae’s ADU income flyer shows it that way, and its illustration is of a loan that is ineligible without the rent and eligible with it. That is a qualifying tool, not a payment discount.
Documentation also matters. The appraiser reports market rent for the ADU. If there are no ADU rentals to compare, the appraiser may use similar non-ADU rentals and adjust. Fannie Mae’s September rental-income update also adds requirements around new leases, including the timing of the first lease payment and documentation of lease amounts. Lenders may apply those changes immediately but must do so by December 1.
What If the ADU Isn’t Built Yet?
Then projected rent generally cannot help you qualify. This is the most common surprise for homeowners who plan to fund a build.
Freddie Mac’s Guide FAQ says projected net rental income counts only if rent begins on or before the first mortgage payment due date. If the lease starts later, because the ADU is still under construction, it cannot be used. Fannie Mae’s ADU policy is aimed at an existing unit as well. Three cases, then:
| Situation | Can the rent help you qualify? |
|---|---|
| Unit built, legal, leased | Possibly, on an eligible loan type |
| Unit built, legal, vacant | Depends on appraiser market rent and program rules |
| Unit not yet built | Generally no |
Is There a Renovation Exception?
Yes, a narrow one. Freddie Mac’s CHOICERenovation offering includes a no-cash-out refinance option to pay off short-term financing used for ADU renovations, including adding or renovating an ADU, completed before the note date. In other words, if you build first with temporary money and then refinance, that path is designed for it.
Freddie Mac’s Bulletin 2026-1 addresses rental income from units in a CHOICERenovation project funded by the mortgage, for applications on or after May 4. How rent from the funded unit is treated depends on the specific wording, so ask the lender to confirm it before you build the plan around it.
This is a genuine tradeoff. Building first and refinancing after can unlock income treatment that a cash-out never would. But it means carrying short-term financing during construction, and the refinance has to qualify when the time comes. If you have thin equity and no cushion, that sequence adds risk. If you have the cash flow to carry the build, it can be the cleaner path.
What About Streamlines and VA Loans?
Neither can fund a renovation or an ADU. The government streamlines are built to lower a payment or change a term on an existing loan, and they were never meant to release cash.
The FHA Streamline allows no cash out, per the FDIC’s summary, and it does not let you roll closing costs into the new mortgage amount. Unit income plays no role. The VA IRRRL is a VA-to-VA loan, possible only with an existing VA-guaranteed loan, and no cash can come out except for energy-efficiency improvements. That rules out an ADU build or general renovation funding. How VA treats ADU income is something to ask a lender directly.
What About a Two- to Four-Unit Home?
That is a different case from an ADU on a one-unit house. Fannie Mae allows rental income from the subject property when it is a two- to four-unit principal residence in which the borrower occupies one unit, and a separate rental-income rule applies, not the ADU rule. How that interacts with a cash-out transaction is a question to put to the lender at the start. Lendmire has covered the house-hacking version in its piece Does Unit Income Help a House Hacker Qualify for a Cash-Out Refinance?.
How Does a Cash-Out Fund the Project Anyway?
It replaces your first mortgage and hands you the difference in cash. On a one-unit primary residence, the conventional version tops out at 80% LTV. Seasoning applies: the loan being paid off must be at least 12 months old, and a borrower must have been on title for six months, with exceptions for delayed financing, inheritance and legal awards. A wholesale lane reaches 89.99% LTV with no mortgage insurance at a 680 score and a 50% ratio on a thirty-year fixed primary residence with a conforming balance, with its own six months of seasoning. In Texas, a cash-out on the homestead is capped by the state constitution, and that wholesale lane is not written there. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
The cash-out works for a project when you qualify on your own income, without the unit’s rent. That is the honest test. If the file needs the ADU income to work, a cash-out will not get you there. Qualification is subject to lender guidelines, credit review and appraisal.
Think about what you are giving up. The new loan replaces the old rate and remaining term. If your current first mortgage is one worth keeping, a cash-out reprices the entire balance to fund a smaller amount of new money. Lendmire has laid out HELOC vs renovation loan vs cash-out refinance for an ADU for homeowners weighing a second lien against a full replacement. The Consumer Financial Protection Bureau has noted that paying non-mortgage debts with mortgage debt can increase foreclosure risk, and its report found home repairs or new construction was the second most common reason for cash-out refinancing.
A practitioner observation: files that run into trouble here are rarely about the loan category. They are about a build budget that grew while the appraised value did not. When a project costs more than it adds, the cash-out leaves the homeowner with a bigger balance and a unit that rents for less than hoped. Vacancy and an unfinished unit can leave you covering the whole payment. Rent never lowers the payment itself.
Which Path Fits Which Homeowner?
Match the plan to the loan. The decision tends to fall out of three questions.
- Do you qualify without the rent? If yes, a cash-out can fund the project, and the unit’s income is a later bonus. If no, a cash-out is the wrong tool.
- Is the unit already built, legal and leased? If yes, a limited cash-out or no-cash-out refinance may let the rent count, within the caps.
- Is your current loan worth keeping? If yes, a second lien may fit better than replacing the whole mortgage.
Documents that tend to matter: the lease or rent schedule, permits and plans, and the appraisal’s rent estimate. And if the plan is a non-income renovation like a kitchen, unit income is moot. Qualify on your own income.
Key Terms Defined
Accessory dwelling unit (ADU): A separate living space on the same lot as a primary home, such as a garage conversion, basement suite or backyard cottage.
Cash-out refinance: A new loan that pays off your current mortgage and gives you the difference in cash.
Limited cash-out refinance: A refinance that returns only small, incidental cash, so it is treated more like a rate-and-term loan.
Qualifying income: The income a lender counts when deciding whether you can afford the loan.
Debt-to-income ratio: Your monthly debts, including the new housing payment, divided by your monthly income.
Seasoning: The minimum time you must hold a loan or title before a refinance is allowed.
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
If you are weighing a cash-out refinance against keeping the loan you have, Lendmire can help you compare the programs and the equity each one reaches.
Frequently Asked Questions
Can projected rent from an ADU I haven’t built count toward qualifying?
Generally no. Freddie Mac counts projected rent only if it begins on or before the first mortgage payment due date, so a unit still under construction usually fails that test. Qualify on your own income, or build first and refinance after the unit is leased, subject to lender guidelines.
Does it matter if the refinance is cash-out or limited cash-out?
Yes, it decides the outcome. Fannie Mae allows ADU income on a limited cash-out refinance, where cash back is capped at the greater of 1% of the new balance or $2,000. A standard cash-out is not on the list, and Freddie Mac and FHA also exclude it.
Does the ADU have to be legal?
Yes. Freddie Mac does not allow rental income from an illegal ADU to qualify a borrower. The appraiser also reports the unit’s market rent, so permits and zoning compliance matter before you count on the income.
Can I count all the rent from my ADU?
No. Only one ADU can supply income, the rent is capped at 30% of total qualifying income, and Freddie Mac counts lease-based rent at 75% of the lease amount. The rent is also added to income rather than subtracted from the payment.
Can an FHA Streamline or VA IRRRL pay for a renovation?
No. The FHA Streamline allows no cash out. The VA IRRRL allows none except for energy-efficiency improvements, so neither funds an ADU build or general renovation.
For your own numbers, request a scenario review with Lendmire.
For current guidelines and terms, see Lendmire’s refinance programs page.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage broker licensed for consumer lending in 16 states. Lendmire arranges FHA, VA, conventional and jumbo purchase and refinance loans through wholesale lenders; every file is underwritten by the lender under the applicable program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Fannie Mae Selling Guide Announcement SEL-2025-08
3. HUD Mortgagee Letter 2023-17
5. Freddie Mac Guide FAQ on ADU rental income
6. Freddie Mac Bulletin 2026-1
This article is part of Lendmire’s Refinance series — every loan program’s qualification details, guidelines, and scenarios live on the loan options page.
Related reading: How Much a Cash-Out Refinance Creates on a 2-4 Unit Primary Home · How Much a 2-4 Unit Cash-Out Refinance Releases at Its Cap · Should You Cash-Out Refinance a 2-4 Unit Primary Home to Renovate?
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.