The Quick Read: For a first DSCR loan, a legal ADU with a long-term tenant usually makes the cleaner file, because the rent can be supported by an appraiser’s market-rent opinion and a lease. Short-term hosting fits when the unit is legally allowed, you have hosting history or a credible projection, and the coverage ratio still holds up after a haircut.
- A DSCR loan is reviewed primarily on property-level rental income covering the payment, subject to lender guidelines.
- Long-term rent is documented with a lease and an appraisal rent opinion. Nightly income needs host history, platform statements, or a market projection.
- Legality comes first. An unpermitted or STR-restricted ADU can leave the income out entirely.
- Short-term rental (STR) programs in Lendmire’s network typically expect about 12 months of hosting history and a 640+ credit score.
Picture a buyer eyeing a house with a detached backyard unit. The nightly-rate math looks great on a napkin. The lender, though, only counts income it can document and that the local rules allow. That gap decides most first-time ADU files. Lendmire’s complete DSCR loans guide covers the basics if the term is new to you.
Short-Term Rental Calculator
Run the STR numbers in your market
Rate source: Freddie Mac 30-yr average via FRED® — Federal Reserve Bank of St. Louis · effective Oct 15, 2026
Prefilled with starting assumptions — enter your nightly rate, occupancy, taxes, and insurance for a more accurate picture.
Short-term rental income is documented with a 12-month history or a market data report. Program parameters update from Lendmire’s centralized guideline source.
As of Oct 15, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Nightly rate, occupancy, taxes, and insurance are editable estimates. Qualifying income for short-term rentals varies by program — some use appraisal market rent, others use documented STR history or projections — and is confirmed in underwriting. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
DSCR means debt service coverage ratio. You divide the property’s rent by its monthly PITIA: principal, interest, taxes, insurance, and any HOA dues. A ratio of 1.00 means rent matches that obligation. It does not mean you are cash-flowing, because repairs, vacancy, management, utilities, and capex sit outside the calculation.
Side-by-Side
The long-term column reflects what most programs across the network do. The short-term column reflects published industry norms plus the network’s STR parameters. Eligibility depends on lender guidelines, credit, property review, and the borrower.
| Factor | Long-Term Tenant | Airbnb / STR |
|---|---|---|
| Review basis | Lease and/or appraiser market rent | Host history, projection, or STR appraisal analysis |
| Rent form | 1007 (1-unit) or 1025 (2-4 unit) | Nightly income documented separately |
| Documentation | Signed lease, rent schedule | Platform statements, deposits, market report |
| Hosting history | Not needed | About 12 months typical |
| Purchase leverage | 75%-80% typical | Up to 75% |
| Credit score | Around 660 typical; 620 in parts of network | 640 minimum |
| Coverage floor | 1.00 where select programs start | 1.00 on purchase; 1.00 on refinance |
| Legal gate | Permitted, legal unit | Permit plus local STR rules, HOA |
| Entity vesting | LLC titling, subject to program terms | Same, subject to program terms |
| Reserves | Often around 6 months of PITIA, varies | Varies by lender, leverage, loan size |
The long-term rent column also has a leverage edge. Cash-out tops out around 75% LTV on standard rentals, while STR cash-out is up to 70%. Loan size, credit, reserves, and property type still apply to either path. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
How the Appraisal Treats Each Income Type
Agency forms are where the names come from, even though agency rules do not govern DSCR loans. Per Fannie Mae’s Form 1007, the appraiser prepares the rent schedule as an attachment for a single-family investment property. Freddie Mac’s copy describes the same form as a format for estimating the subject’s market rent. Note the word: monthly market rent. The form does not capture nightly-rate income.
Classification matters here. A house with a detached ADU may be treated as a one-unit property with an extra structure, or as a 2-4 unit property. That changes the form and the rent method. Whether the ADU’s rent counts toward the ratio depends on the appraiser’s opinion, the property’s classification, and the program’s rules.
Many programs credit the lower of the lease or the appraiser’s market rent. A strong lease does not rescue a thin rent schedule. Some programs also want comparables that include an ADU, which is a program-specific overlay, not a universal rule.
When a Long-Term Tenant Is the Better Fit
A long-term tenant is the better fit when this is your first DSCR loan and you want the simplest documentation. That covers most first-time borrowers with an ADU.
Choose it when:
- You have no hosting history. STR programs typically expect about 12 months of it. A long-term lease needs none.
- STR is restricted or uncertain locally. Short-term rental rules can vary by city, county, HOA, and property type, so confirm local rules before relying on projected rental income. Shelterforce notes that jurisdictions commonly tie owner-occupancy to ADUs and to short-term rentals. It also quotes an advocate saying such rules can limit financing, because a foreclosing lender cannot live in the unit.
- The ADU is new or vacant. Long-term underwriting can lean on the appraiser’s market rent without a signed lease. An STR on a new unit needs a projection or the program’s alternative method.
- You want a stable file. Lease income is predictable. A lender reviewing STR income looks harder at seasonality and rule changes.
- You may want to refinance later. A clean, documented rental history helps the next file.
Run the numbers on a modeled case: the ADU’s market rent supports coverage around 1.15x on a purchase at 75% LTV. That is above the 1.00 floor where select programs start, which leaves room for a rent schedule that comes in a bit lower than hoped. Programs differ, and coverage that stronger tiers reward can open better leverage. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.
The ADU must be legal. An unpermitted unit is likely to be flagged by the appraiser and left out of both value and rental income. Treatment varies by lender, program, and appraisal, and rent you actually collect does not automatically count as qualifying income.
Sub-1.00 coverage is a separate path. It is available through select lenders in the network, with leverage and terms adjusted. It is not the same program with a lower floor.
When Airbnb Is the Better Fit
Airbnb is the better fit when the ADU is legal for short-term use, the market supports nightly demand, and you can document income beyond a projection. It fits investors who accept more variance for more upside.
Choose it when:
- Local rules clearly allow it. Permits, zoning, licensing, and HOA rules get reviewed before funding. A building permit for an ADU does not by itself give you STR rights. Nightly listings there are legal only where local rules allow them.
- You already host. About 12 months of platform history is the usual expectation for STR programs. Earnings statements and bank deposits then document the income.
- The ratio survives a haircut. Some lenders discount STR revenue for expenses, and published treatments vary by program. Model the unit with revenue trimmed, not at the full booking projection.
- Demand is genuinely tourist- or travel-driven. Use employment, rent levels, and occupancy data rather than hunches.
- You can handle the workload. Turnovers, cleaning, guest messages, and platform dependence all fall on you or a manager.
Here is the catch for a first-time buyer: with no hosting history, the lender may rely on a market projection or the program’s alternative method. Those projections tend to get more scrutiny than a signed lease. Lendmire’s own pieces on STR income versus long-term rent fallback and how to stress-test a first Airbnb at long-term rent walk through that gap.
STR financing parameters across the network are typically up to 75% LTV on a purchase, about 70% on a refinance, and up to 70% on a short-term-rental cash-out. Those are guidance ranges, not commitments. The purchase floor and the refinance floor are both 1.00.
One ADU, Two Strategies, Same Test
Model both cases before you make an offer. Here is how the same hypothetical ADU reads through each lens, with ratios only.
| Test | Long-Term | Airbnb |
|---|---|---|
| Income the lender uses | Lower of lease or market rent | Documented history or projection |
| Haircut risk | Low | Higher |
| Ratio on paper | Around 1.15x | May look stronger, around 1.3x |
| Ratio after a stress test | Holds near 1.1x | May slip toward 1.0x |
| Legal gate | Permit and legal unit | Permit plus STR rules |
The STR number can look better on paper and still lose the comparison. Lenders may look harder at STR coverage because the income varies. If the stressed ratio drops near 1.00, the cushion is gone.
Also think about how the unit is used. A family-, guest-, or owner-occupied ADU may produce no rent used for lender review at all. If only one unit is legal for short-term use, the file may combine one STR income stream with one lease, or count only the legal piece.
Common Mistakes
A few errors show up repeatedly on first-time ADU files:
1. Counting nightly math the lender never sees. The appraiser’s rent opinion and the program’s method drive the number, not your optimistic projection.
2. Assuming the ADU rent counts automatically. Legal status, classification, and program rules decide.
3. Treating a permit as an STR license. They are different approvals.
4. Equating a 1.00 ratio with profit. DSCR compares rent to PITIA only.
5. Ignoring property type limits. Manufactured homes, log homes, and barndominiums are not offered in the network’s DSCR programs, which matters if the ADU or main structure falls in those categories.
One practitioner-level pattern: on files like these, the stronger ones lock down legality and the income method before the appraisal is ordered. A late discovery that the unit is unpermitted, or that the HOA bars STRs, tends to reshape the whole file. Working with a broker who sees many lenders’ guidelines helps, because overlays on ADU comparables and STR history differ from one program to the next.
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.
Choosing for a First Loan
A quick decision path:
- STR restricted or unclear locally: go long-term.
- No hosting history, first DSCR loan: long-term is typically the cleaner file.
- Legal STR, existing history, strong stressed ratio: Airbnb can make sense.
- Want flexibility later: start long-term, document the rental history, then revisit strategy when you refinance.
- Main house and ADU both exist: price each unit’s income separately, and confirm which ones the program and the appraiser will count.
Documents differ by path. For long-term, gather the lease, the permit record, and proof of the unit’s legal status. For STR, add platform statements, bank deposits, a market report, and local registration or licensing.
Mid-term rentals sit between the two. Whether a lender treats that income like a lease or like STR depends on the program, so ask before you rely on it.
LLC vesting works for both strategies, subject to lender program eligibility. Your reserves, credit, and loan size shape the file either way. Reserves are commonly around 6 months of PITIA, though they vary by lender, leverage, and transaction type.
The Verdict
Pick the long-term tenant if you want the simplest first DSCR file and the legal picture is anything short of crystal clear. Pick Airbnb only when the unit is clearly legal for nightly use, the income is documented, and the ratio still clears after you cut the revenue. Many investors start long-term, build a clean record, and move to hosting later. That sequence costs some upside but protects the first loan.
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. Tax treatment varies; consult a qualified professional. The brokerage arranges financing through select lenders in its wholesale network, across 41 markets including Washington, D.C. Not a commitment to lend.
Frequently Asked Questions
Can I Airbnb my ADU and still get a DSCR loan?
Sometimes, if the unit is legally eligible for short-term use and the income is documented. Network STR programs typically expect about 12 months of hosting history and a 640+ credit score. Qualification is subject to lender guidelines, property review, and underwriting.
Does a signed lease on my ADU guarantee the rent counts?
No. Many programs credit the lower of the lease or the appraiser’s market rent, and the unit must be legal. Classification as a one-unit property with an ADU versus a 2-4 unit property also affects how the rent is analyzed.
What if I have no hosting history?
Use a long-term lease or market rent for the first file. A market projection can be used on some STR programs, but it draws more scrutiny. Many investors build a hosting record later and then refinance.
Does Form 1007 capture Airbnb income?
No. It documents monthly market rent. Nightly income is documented separately through platform statements, deposits, or a market report.
Can I switch strategies after closing?
You can, but local rules, HOA terms, and your loan documents all matter. A documented rental history from the first strategy helps any later refinance.
About Lendmire
Lendmire, NMLS# 2371349, is a non-QM mortgage broker serving real estate investors in 41 markets, including Washington, D.C., through DSCR investor loan programs. Qualification is generally reviewed around the subject property’s rental income, not the borrower’s W-2 history — a practical fit for LLC-titled portfolios and self-employed investors. All scenarios remain subject to lender review and program guidelines. Two consecutive Scotsman Guide Top Mortgage Workplace recognitions (2025, 2026).
Get Started
Ready to find the right loan for you?
In about 30 seconds you can review financing options available for your investment property. No commitment required.
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
1. Fannie Mae Form 1007 (Single-Family Comparable Rent Schedule)
2. Freddie Mac Form 1000 / Fannie Form 1007
3. Shelterforce: ADU laws and uses
This article is part of Lendmire’s short-term rental loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Can a Travel Nurse Mid-Term Rental Qualify for a DSCR Loan? · How to Document a Below-Market Lease for a DSCR Loan · Can a First-Time Landlord Use Market Rent for a DSCR Loan?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.