The Quick Read: A permitted ADU can usually count toward both the appraised value and the rental income on a rental cash-out refinance, while an unpermitted ADU is usually excluded from both, which cuts into the equity test and the coverage test at the same time. A permitted ADU suits the investor who wants the unit to carry real weight in the loan. An unpermitted ADU works best as upside on a loan sized to the main unit alone. Lender and appraiser treatment varies, so every file is reviewed individually.
- Legal use decides most of the outcome, and the borrower’s entity or income story does not change it.
- A cash-out refinance on a standard rental tops out around 75% LTV, and the ADU only helps if it counts in the appraised value.
- Rent from a unit the lender will not count cannot help the coverage ratio.
- Clearing 1.00 coverage is not the same as positive cash flow, because repairs, vacancy, and management sit outside the calculation.
- Permit first and refinance second is the safer order for most investors.
Side-by-Side
The table shows how each status typically plays out across the wholesale network’s DSCR programs. Treatment still depends on the lender, the appraiser, and how the property is classified.
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| Factor | Permitted ADU | Unpermitted ADU |
|---|---|---|
| Review basis | Rent may count if the program allows | Rent is usually excluded |
| Documentation | Permit record, final sign-off, lease | Permit search, appraiser findings |
| Appraised value | May be supported by comps | Often limited or no value |
| Property types | Depends on one-unit or 2-4 unit class | Often flagged on any class |
| Entity vesting | LLC fine, per lender program terms | LLC does not cure status |
| Timeline | Normal review | Added questions, possible conditions |
| Reserves | Standard for the loan size | Standard, and thinner cushions hurt |
On reserves, the network commonly looks for about 6 months of PITIA. Conservative rate-and-term files at modest balances can see reserves waived. Loans above $1,500,000 typically step up to about 9 months. These figures move with leverage, loan size, and transaction type.
When a Permitted ADU Is the Better Fit
A permitted ADU is the better fit when the investor wants the unit to support both loan value and rental coverage. It exists on the public record, an appraiser can point to it, and a lender can underwrite it.
Picture an investor who built a detached unit with full permits and a final inspection. The appraiser reports a real second dwelling. If comparable data exists, the value may reflect it. If the program allows ADU rent, the appraiser’s market rent opinion can feed the coverage ratio. Both tests grow together.
Permitted does not mean automatically counted, though. Property classification still matters. A single-family house with an ADU is a different file from a duplex or triplex, and some programs treat a duplex plus an ADU as a harder category. Comparable sales also matter. A newly permitted unit in a neighborhood with no similar sales can draw conservative value from the appraiser. Older research on ADU appraisal, published by the accessorydwellings.org project, notes that appraisers and loan originators tend to be very conservative with contributory value when a property is classified as a simple duplex or lacks an ADU permit. It is dated, but the dynamic still shows up in practice.
Permitted is the stronger choice if any of these apply:
- The investor plans to pull equity and wants the ADU’s value in the appraisal.
- The property’s rent barely clears the coverage floor without the ADU.
- The investor wants a clean record for a later sale or refinance.
- Rent from the unit has to carry the DSCR ratio.
When an Unpermitted ADU Is the Better Fit
An unpermitted ADU can be the better fit when the investor does not need it to count. If the main unit already supports the loan, the ADU is bonus income the lender never relied on.
Say the main house clears the coverage floor on its own and the equity supports the cash-out at 75% LTV on a standard rental. The ADU adds rent in practice but nothing on paper. The loan works because it was sized without the ADU. That is the defensible way to hold an unpermitted unit through a refinance. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
An unpermitted unit also makes sense in a few other cases:
- The investor is buying at a discount that reflects the legal risk and plans to legalize later.
- The unit would not pass a permit today, so legalization is not a realistic path.
- The investor wants cash out now and accepts a smaller proceeds figure rather than waiting on permits.
The real cost is exposure. Appraisers who find an unpermitted structure must disclose it, and the file can pick up conditions. Investors also take on the risk that a neighbor, a tenant, or a later permit draws the city’s attention. A unit that has rented smoothly for years can still complicate a refinance.
One shortcut deserves a flat warning. Leaving a known ADU off the application does not fix anything. Appraisers see what is on the property, and misrepresenting the property to a lender is a bigger problem than a smaller loan.
How Appraisers and Lenders See the Gap
Two questions get answered separately. The appraiser reports what exists and what the market would pay for it. The lender then decides whether to count it. A high rent history does not answer either one.
Practitioners on Appraisers Forum describe the usual approach. The appraiser discloses the unpermitted status, then analyzes how the market reacts. If the client requires no value for unpermitted improvements, the appraiser has to state a hypothetical condition when the status is certain, or an extraordinary assumption when it is only suspected. WorkingRE explains that USPAP Standards Rule 2-1(c) requires disclosure of those assumptions and conditions. An appraisers’ trade blog argues that an appraiser cannot complete an as-is assignment by pretending unpermitted space does not exist, so the choices narrow to widening the scope of work, using an extraordinary assumption, or declining.
Agency lending offers a useful contrast, and only that. Freddie Mac’s ADU fact sheet says an ADU must comply with local zoning and land-use requirements. A practitioner discussion quoting similar agency-style guidance lists conditions for ADUs that zoning does not allow, including insurance confirmation and comparable sales with the same non-compliant use. DSCR programs set their own rules, and some are stricter or looser than agency guidance.
The appraiser also uses a standard rent schedule form, Form 1007 on one-unit rentals and Form 1025 on two-to-four unit properties. Those are only paperwork names. Which units count, and how rent is measured, comes from the program.
Across the lenders in Lendmire’s network, a few patterns hold:
- Most programs follow the appraisal. If the appraiser excludes the ADU, the lender usually does too.
- Some lenders will accept a nonpermitted unit when the appraisal supports it. Others will not.
- Lenders may ask for permit verification, confirmation that the space is in legal gross living area, or confirmation of no health and safety issue.
- Typical fixes are permitting, removing or reconfiguring the unit, or lowering the loan size.
What It Does to Cash-Out Sizing
Every cash-out has to clear two tests. The loan must fit under the LTV cap, and the rent must cover PITIA to the required ratio. An excluded ADU weakens both, which is why the permit decision matters more here than on a purchase.
Run it as a modeled illustration, not market data. Take one property with a main unit and an ADU, and assume the same appraised-value opinion in both cases except for the ADU’s contribution.
- Permitted case: The appraiser counts the ADU. Value reflects the main house plus the ADU, so the 75% LTV ceiling on a cash-out of a standard rental applies to a larger number. If ADU rent counts, coverage might land around 1.25x.
- Unpermitted case: The appraiser excludes the ADU. Value drops to the main house alone, so the same 75% ceiling applies to a smaller number. Rent counts only for the main unit, so coverage might land around 1.05x. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
In the second case the loan is smaller, and the coverage ratio sits closer to the floor. If it slips under 1.00, a program with a 1.00 starting point may not fit. A separate path through select lenders in the network takes coverage below 1.00, with LTV and terms adjusted. That route costs leverage, which is the opposite of what a cash-out investor wants.
Other factors on the file still apply:
- A credit floor of 620 exists in parts of the network, most programs want around 660, and 700 or higher opens the strongest leverage tiers.
- Seasoning of about 6 months of ownership, measured from title recording, is the common expectation for cash-out.
- Standard programs run up to $3,000,000, and smaller balances route through select lenders in the network.
A larger down payment or more equity never erases these caps. The strongest files clear both tests, enough equity and enough rental coverage. Lendmire’s complete DSCR loans guide walks through how the coverage ratio and LTV interact.
Checking Legal Status Before Anything Else
The first step is local records, not a lender call. The building and zoning department decides legal status, and the appraiser and lender apply it afterward.
1. Request the permit history for the property from the local building department.
2. Look for a final inspection sign-off and a certificate of occupancy for the unit itself.
3. Confirm what was approved. A detached structure may have been permitted as storage or an office, and a bedroom with a kitchenette is not automatically a separate dwelling.
4. Ask whether the city would permit the unit today under current zoning, setbacks, and density rules. If not, legalizing the existing unit may not be realistic.
5. Gather leases, payment history, and proof of insurance for the unit.
Some cities run amnesty or legalization programs for existing units. Availability is local and changes over time, so check current rules before assuming one applies. Also be careful when you contact the city. A records request is routine, but a legalization application can bring inspections, fines, or required changes.
Entity vesting does not change any of this. A DSCR loan to an LLC with a personal guaranty is routine, subject to lender program eligibility. The legal-use question follows the property and not the borrower. Keep names consistent across title, insurance, lease, and bank account.
Key Terms Defined
Legal use: What the local building and zoning department has approved the structure to be used for.
Certificate of occupancy: The local sign-off that a structure is approved for people to live in.
Contributory value: The amount an improvement adds to appraised value, based on comparable sales.
Extraordinary assumption: An appraiser’s disclosed assumption about a fact that cannot be verified, which affects the result if it is wrong.
Hypothetical condition: A disclosed condition the appraiser treats as true for the assignment even though it is known to be false.
A Balanced Verdict
Choose the permitted route if the ADU has to carry weight. That means the investor needs its value for the cash-out amount, needs its rent for coverage, or wants a clean record for the next sale. Permit first, then refinance, and check how the appraiser and lender treat a recently permitted unit, especially if comparable sales are thin.
Choose the unpermitted route only if the loan stands without the ADU. Size the cash-out on the main unit, treat the ADU as upside, and accept the added questions and the legal exposure. If the numbers only work with the ADU counted, that is a sign to permit first or look at a different property.
There is also a middle option. The investor can refinance now at the smaller size and legalize later, then refinance again once the unit counts. That adds a second set of costs and the seasoning wait. It makes sense only when the cash-out today is worth more than the extra step.
Frequently Asked Questions
Can I refinance a rental with an unpermitted ADU?
Often yes, as long as the loan is sized without the ADU and the property otherwise meets program rules. The appraiser will disclose the unit, and the lender may add conditions. Treatment varies by lender, so qualification is subject to lender guidelines and property review.
Does rent from an unpermitted ADU count toward DSCR?
Usually not. Most programs tie rent used for lender review to a legal unit, and actual rent does not make a unit lawful. Underwrite the deal on the main unit and treat the ADU rent as extra income that the loan does not rely on.
Is unpermitted the same as illegal?
Not always. Unpermitted means no permit record exists. Illegal means the use violates zoning or code. Some units are grandfathered or can be legalized, and others could not be permitted today. The local building department decides.
Should I leave the ADU off the application?
No. The appraiser inspects what is there, and hiding a known unit creates a bigger problem than a smaller loan. Disclose it, size the loan without relying on it, and let the appraiser report what exists.
What if two lenders give different answers?
That is common, because lenders weigh appraisal support, property classification, and local comps differently. Ask each one the same three questions: whether they count ADU value, whether they count ADU rent, and what permit proof they want. A broker placing files across many lenders can compare those answers.
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. Programs change, every file is reviewed individually, and nothing here is a commitment to lend.
Investors weighing their equity options can start with Lendmire’s guide to cash-out refinance on an investment property.
About Lendmire
Lendmire (NMLS# 2371349), a non-QM mortgage broker serving investors in 41 markets including Washington, D.C., helps structure DSCR scenarios commonly evaluated around a property’s rental income rather than personal income paperwork, subject to lender guidelines. A Scotsman Guide Top Mortgage Workplace in 2025 and 2026, Lendmire places loans through wholesale investor lenders and is not a direct lender.
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References
1. Brown & Watkins, Understanding and Appraising Properties with ADUs
2. Appraisers Forum – Appraising a house with un-permitted addition
3. WorkingRE – Extraordinary Assumption or Hypothetical Condition
4. Appraisers Blogs – Zombie assignment condition
5. Freddie Mac – ADU fact sheet
6. Appraisers Forum – Calling unpermitted an ADU
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: Can Short-Term Rental Income From an ADU Count on a DSCR Loan? · DSCR Cash-Out Now vs Waiting for Hard Money and Rehab Card Payoff · Selling a Rental vs. a DSCR Cash-Out Refinance for the Next Purchase
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Important disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage brokerage. Lendmire is not a direct lender, depository institution, or financial advisor. All loan inquiries are subject to lender underwriting; this article does not constitute a commitment to lend. Rates, terms, and program guidelines are subject to change without notice and vary by borrower profile, property type, and state. Information in this article is general in nature and is not financial, legal, or tax advice. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.