The Quick Read: Usually the lender treats the unit as if it does not exist for the numbers. The appraiser flags it, the unit’s rent and value are typically left out, and the cash-out is sized on what remains. Some lenders will not go forward until the unit is legalized. Exact treatment depends on the lender, the appraisal, and local records.
- Rent from an unpermitted unit generally does not count toward coverage.
- The unit is typically excluded from appraised value, which shrinks the maximum loan.
- Outcomes range from closing as-is on reduced numbers to a required permit to a decline.
- The main house has to carry the new payment on its own merits.
Here is the straight version. A cash-out refinance on a rental, through the select lenders in Lendmire’s wholesale network, tops out around 75% LTV on standard rentals. LTV is loan-to-value, the loan as a share of appraised value. If the appraiser leaves out your unit, “value” gets smaller. So does the cash you can pull. The rest of this piece walks through why, and what you can do about it. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
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What Counts as an “Unpermitted Unit”?
An unpermitted unit is a living space with its own kitchen, entrance, or sleeping area that was built or converted without city sign-off, or was never approved as a separate dwelling. Garage conversions, finished basements rented out as apartments, backyard cottages, and rooms added without permits all fall here.
Three terms get mixed up:
- Permitted: The city issued permits and the work passed inspection.
- Legal unit: The city recognizes the space as its own dwelling. Having permits for the work does not by itself make a space a legal unit. A basement can be finished with permits and still never approved as a second unit.
- Legal nonconforming: The use predates current rules and is allowed to continue, usually documented in city records.
Permit and zoning are also separate questions. Appraiser discussions note that zoning may allow a use even when nobody pulled the permit. The lender cares about both.
What Does the Lender Do, in Order?
The lender follows a fixed sequence, and the unit gets tested at each step.
1. Application. You describe the property: unit count, rents, leases. Tell the truth here. A unit that shows up later in the appraisal looks worse than one you disclosed.
2. Appraisal. A full appraisal is almost always ordered on a DSCR cash-out. It supplies value and market rent. For a single-family home, the rent comes from a rent schedule (Form 1007). For two to four units, it comes from an operating income report (Form 1025). Those are appraisal forms, not DSCR rules, but the appraisal is where the unit is judged. A unit-specific rent schedule and permit records are the added paperwork an ADU appraisal needs, according to BuildWithAPlan.
3. Legality check. The appraiser looks at permits, zoning, and unit count, and may contact the municipality.
4. Underwriting review. The lender reads the appraiser’s comments, then calculates coverage and maximum loan from what the appraisal supports.
5. Conditions. If the unit is a problem, the file comes back with a condition: permit it, remove the kitchen, or resubmit on reduced numbers.
A quick note on how appraisers handle uncertainty. When the appraiser only suspects the unit is unpermitted, they may rely on what appraisers call an extraordinary assumption. McKissock Appraisal defines that as an assignment-specific assumption about uncertain information that could change the conclusions if it proves false. When the appraiser is sure the unit is unpermitted, a hypothetical condition is the more usual tool. Either way, the unit ends up flagged in the report.
Does the Rent From an Unpermitted Unit Count?
Generally no. Coverage, or DSCR, is monthly rent divided by the full monthly housing payment (principal, interest, taxes, insurance, and any association dues). The numerator is the appraiser-supported market rent. If the unit can’t be supported as a legal unit, its rent typically drops out of that number.
Collected rent does not fix this. A signed lease and a year of deposits show that a tenant lives there. They do not turn the space into a legal dwelling in the appraiser’s report. Lenders lean on the appraiser’s rent exhibit, not on your ledger.
Picture a duplex-style setup: a main house plus a converted garage rented out. With the garage rent counted, coverage might look comfortable. With it excluded, the main house alone has to cover a payment sized for the whole loan. That swing is often the difference between clearing 1.00 and missing it.
One reminder on that number. 1.00 is where many select programs start, and a separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. Clearing the ratio also does not mean positive cash flow. Repairs, vacancy, management, and utilities sit outside the calculation.
How Does the Unit Change Value and Cash-Out Proceeds?
It shrinks them. Appraisers are expected to note unpermitted structures, and most will not assign value to unpermitted improvements, according to GatherADU. In some cases the unit even reads as a liability. Appraisers do differ here, and some argue that a flat zero without analysis is wrong. An unpermitted addition built in a workmanlike way, common for the area and supported by market data, can sometimes be considered. Insurability is a separate question.
Here is how the chain plays out:
1. The appraiser excludes the unit, so appraised value comes in lower than you hoped.
2. The lender applies its cap to that lower value. On standard rentals, cash-out across most of the network tops out at 75% LTV.
3. The maximum loan falls with the value.
4. The existing mortgage gets paid off first, and what is left is your cash.
Because the payoff stays fixed, a small drop in value can take a large bite out of proceeds. A thin-equity file can end up with little or nothing to pull. Equity available also depends on rent used for lender review, the payment, and reserves. It is never a guaranteed figure.
The second hit comes from coverage. The loan is also tested against the debt service coverage ratio, and that test just lost the unit’s rent. A modest appraisal miss can push a file under the lender’s coverage minimum.
What Are the Possible Outcomes?
| Path | What happens | Best fit when |
|---|---|---|
| Close as-is | Unit excluded from value and rent; loan sized on the main house | Main house covers the payment and equity is ample |
| Legalize first | Permit the unit, then reappraise | The city allows retroactive or as-built permits |
| Restructure | Rate-and-term refinance or delayed cash-out | You need the lower balance more than the cash |
| Decline | Lender will not lend with the unit present | Unit is clearly noncompliant or the lender has a strict overlay |
An appraisal can also come back “subject to” conditions, mostly when the unit clearly does not meet required standards. Some lenders treat the unit as a deal-breaker. Others shrug and price it in. That spread is why shopping the file across several wholesale lenders matters. Programs differ on how they handle unit count and legality, and the best fit depends on your property and your numbers.
Rate-and-term is a different animal. It returns no cash at closing, and the network’s ceiling there is higher. If the main house can carry the loan, restructuring this way keeps the unit from sinking the deal, though you give up the cash.
How Does Each Type of Unit Get Treated?
| Situation | Rent | Value | Typical next step |
|---|---|---|---|
| Garage conversion, no permit | Usually excluded | Usually excluded | Permit it or refinance on the main house |
| Basement finished with permits, never approved as a unit | Usually excluded | Space counted, unit status questioned | Confirm with the city whether it can be recognized as a unit |
| Detached backyard unit, no permit | Usually excluded | Often zero | Retroactive permit, if allowed |
| Legal ADU with permits | Counted when supported | Counted on comps | Standard file |
| Extra bedroom added without permit | Not separate rent | Area may be excluded from living area | Disclose; appraiser decides |
Unit count matters too. For financing, some lenders allow only one accessory unit per property, so a split unit may not count twice. A legal second unit can also change the classification from a single-family rental to a two-unit property, which changes which appraisal form and which eligibility rules apply.
One property type is out no matter what: manufactured homes, log homes, and barndominiums are not offered in the network’s DSCR programs. A conversion on one of those is not a permitting problem. It is an eligibility one.
DSCR vs. conventional financing
There are two common ways to finance an investment property, and they qualify you differently — here’s how investors weigh them.
Why investors choose it
- Qualifies on the property’s rental income — no personal tax returns, W-2s, or pay stubs needed to document income.
- No personal debt-to-income ceiling to clear, so existing mortgages and obligations don’t cap your borrowing the same way.
- Can be closed in an LLC, keeping the property inside a business entity.
- Built for scaling — not held to the limit on number of financed properties that conventional financing applies.
- Underwriting centers on the deal: generally qualifies when the rent covers the payment, a 1.00x coverage ratio being a common baseline (confirmed in underwriting).
- Designed specifically for investment property, including long-term and, where the program allows, short-term rentals.
Where it’s strong
- Often the lowest ongoing financing cost for a buyer who fully qualifies on personal income — a fit for a first property or a cost-first purchase.
Trade-offs for investors
- Requires full personal income documentation and must fit within a debt-to-income limit — salary, existing debts, and other mortgages all count.
- Typically held in your personal name rather than a business entity.
- Caps how many financed properties you can carry, which can become a ceiling as a portfolio grows.
- Evaluates you as a borrower as much as the property, which usually means more paperwork.
How investors usually choose: a first or single property often optimizes for the lowest financing cost; portfolio builders often optimize for leverage, vesting in an LLC, and scaling past conventional caps. The right answer depends on your goals, the property, and current guidelines — both paths run through select lenders in Lendmire’s wholesale network, with eligibility and terms confirmed in underwriting.
Can I Fix It Before Applying?
Often, yes, and this is where the investor decision sits. You have three real options.
Permit it. Some cities allow a retroactive or as-built permit. Cost and availability vary by jurisdiction. The work may need to be opened up for inspection. If it passes, the unit becomes a legal asset, and a reappraisal can count it.
Refinance as-is. If the main house clears coverage alone and the equity cushion is wide, you can close on reduced numbers. You lose the unit’s value in the loan size, but you keep the unit physically and keep collecting rent.
Wait or restructure. Delay the cash-out until the unit is legal, or take a rate-and-term in the meantime. The loan seasoning clock, about 6 months from title recording for cash-out, runs regardless.
Test yourself before you apply. Ask:
- Can I produce permits or city approval for the unit?
- If the unit disappeared from the appraisal, would the main house still clear coverage?
- If value dropped by the unit’s share, is there still equity at 75% LTV on a standard rental?
- Do I have reserves? Across the network they commonly run about 6 months of the full payment, and about 9 months on loans above $1,500,000, though the exact count varies by lender, leverage, and loan size.
If you answer no to the second or third, the as-is path is thin.
What Should You Disclose and Prepare?
Disclose the unit. Concealing it invites trouble. Permit status can surface later at title or with the insurer, and a lender who finds it late tends to be less flexible than one who sees it up front. One practitioner idea gets repeated in investor circles: that appraisers never check permits. Appraisal-standards discussions treat municipal verification as expected practice, and in any case practice varies, so don’t build a plan on it.
A short checklist:
- Permit records, or a written statement of what is missing
- Unit layout and a description of kitchen, entrance, and bathroom
- Current leases and rent history, as supporting context only
- A scenario run with the unit excluded
- Insurance confirmation covering the unit
Buyers should carry the same logic into purchases. Don’t pay for the unit’s value if it won’t appear in an appraisal.
Where This Won’t Work
- Thin equity where the unit’s excluded value pushes the loan above the cap.
- A main house that cannot cover the payment alone, with no willingness to permit the unit.
- A property whose conversion is on an ineligible property type.
- A lender or appraiser who treats the unit as a safety or code liability the borrower won’t correct.
If the numbers fail on the main house, no amount of lease paperwork saves them. The strongest files clear both tests: enough equity and enough rental coverage, with the property itself eligible. For the broader picture of how these loans are built, see the complete DSCR loans guide.
Credit and size matter alongside property issues. Credit tiers start at a 620 floor and step up through 660, 680, and 700, with higher scores generally opening stronger leverage. Standard loan sizes run up to $3,000,000, with balances under the standard minimum routed through select lenders. Everything here is subject to lender guidelines, and programs change.
Frequently Asked Questions
Can the unpermitted unit cause a full decline even if I don’t need its income?
Yes, with some lenders. A few treat any unpermitted dwelling as a deal-breaker regardless of coverage. Others exclude it and move on. This is one reason a broker shops the file across several wholesale lenders instead of sending it to one.
Does a lease or rental history make the unit count?
Generally not. Lenders rely on the appraiser’s market-rent exhibit, and a lease on an unpermitted space does not make it a legal unit. Rental history can be useful background, but it rarely replaces appraiser-supported income.
Is an unpermitted unit always valued at zero?
Not in every case, though zero is common. Appraisers differ. Some discount rather than exclude, and an addition that is workmanlike, common for the area, and supported by market data can sometimes be considered. Expect the lender to be cautious either way.
Should I do a rate-and-term instead of a cash-out?
It can make sense if the main house covers the payment and you do not need cash. A rate-and-term returns no cash at closing and carries a higher leverage ceiling in the network, so it is less exposed to a value haircut. Whether it works depends on your payoff, equity, and the lender’s treatment of the unit.
Does an automated valuation catch the permit problem?
No. An automated valuation model can’t see permit status. That is exactly why a DSCR cash-out generally uses a full appraisal, where someone can look at the unit and the records.
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. Lendmire is a mortgage broker that arranges DSCR financing through select lenders in its wholesale network, across 41 markets, including Washington, D.C. Qualification is primarily on property-level rental income covering the payment, subject to lender guidelines. This is not a commitment to lend.
A deeper walk-through of investment-property equity extraction lives in Lendmire’s guide to cash-out refinance on an investment property.
About Lendmire
Lendmire — NMLS# 2371349 — is a mortgage brokerage specializing in DSCR investor loans, helping arrange financing across 41 markets, including Washington, D.C., through wholesale and investor-lending channels. The model centers on property-level rental income reviewed by the lender rather than W-2 documentation, subject to lender guidelines, suiting entity-owned and multi-property investors. Lendmire holds Scotsman Guide Top Mortgage Workplace recognition for 2025 and 2026.
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References
1. BuildWithAPlan – ADU appraisal
2. McKissock Appraisal – extraordinary assumptions
3. GatherADU – how appraisers value ADUs
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: What a DSCR Cash-Out Refinance Lender Checks on a Section 8 Lease? · How to Do a DSCR Cash-Out Refinance When Your Ex Still Owns Half · DSCR Cash-Out Refinance Rules If You Lost a Property to Foreclosure
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.