The Quick Read: A lender counts a casita’s Airbnb income only when you can prove three things: the casita is a legitimate rentable unit, its nightly revenue is tracked separately from the main house, and short-term renting is legally allowed there. Reconciled payout statements and matching bank deposits carry the file. Everything else supports them.
- Tie every platform payout to a bank deposit, and tag both to the casita listing.
- Expect the lender to discount gross short-term income before it runs the coverage ratio.
- Short-term-rental purchases typically reach up to 75% LTV on the strongest files, with a 640 credit score and about 12 months of hosting history as common expectations.
- A casita with no kitchen or separate entrance may not count as a unit at all.
- Clearing 1.00 coverage is not the same as making a profit.
A detached casita is a good example of why DSCR files need careful paperwork. The income can be real, and the unit can still fail to show up on paper. This guide walks through how underwriting treats the casita, how to build the paper trail, and where the usual rules break. Lendmire is a broker that arranges these loans through select lenders in its wholesale network across 41 markets, including Washington, D.C. The mechanics below come from the files it places.
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.
Key Terms Defined
DSCR (debt service coverage ratio): the property’s qualifying monthly income divided by its full monthly payment. A result of 1.00 means income equals the payment.
PITIA: principal, interest, taxes, insurance, and any association dues. It is the payment side of the ratio.
Casita: a free-standing guest unit on the same parcel as the main home. Appraisers also call it a guest house, carriage house, or detached accessory dwelling unit (ADU), depending on the region, per McKissock.
Qualifying income: the income a lender actually uses after any discount. It is usually lower than the gross revenue on your Airbnb dashboard.
Trailing history: the most recent run of months of actual bookings, shown through platform statements and bank deposits.
Form 1007: the appraisal form that reports monthly market rent for a one-unit investment property.
How Does a Lender Classify a Detached Casita?
Most lenders treat a main house plus a detached casita as one property with an accessory unit, not as a 2-4 unit property. The appraiser’s description of the casita drives that call, and the classification then drives how its income can be counted.
An ADU generally needs its own living, sleeping, cooking, and bathroom facilities. A guest room over a garage with no kitchen is a different thing. An appraiser may report it as extra living space or a finished outbuilding rather than a rentable unit. When that happens, the casita may not support separate rental income at all.
The appraisal also treats the square footage differently. McKissock’s gross living area guidance explains that ADUs and finished outbuildings are excluded from gross living area. They sit on a separate line of the adjustment grid. A casita does not add to the main home’s square footage, and comparable sales for it can be scarce.
If a lender treats the casita as a second unit, the appraisal report may shift from the one-unit rent form to the small residential income property report. McKissock notes that Form 1007 covers one-unit properties, while Form 1025 covers two- to four-unit properties. Which form you get depends on the lender and the appraiser’s read of the structure. Ask early, before the appraisal is ordered.
Step by Step: Building the Casita Paper Trail
The casita is one more income stream on the property, so the file must show where the money came from. Here is the method that works across most lenders in the network.
1. Give the casita its own listing. One listing, one calendar, one payout stream. If the main house is also on a platform, keep the two listings separate.
2. Match the name and address everywhere. The listing, the permit or license, the insurance policy, and the appraisal should describe the same structure the same way. Mismatches are the most common reason a casita file stalls.
3. Export the platform statements. Pull every payout statement for the period you want counted. Gross booking revenue and net payouts differ because of platform fees and other withholdings, so keep both.
4. Reconcile payouts to bank deposits. Each payout should land in an account you can show. Deposit those payouts into a business or dedicated account, not a personal account mixed with paychecks. A lender wants to trace the money without guessing.
5. Keep manager statements if someone runs the unit. A property manager’s monthly reports can back up the platform data. They also show the expenses that come out before you are paid.
6. Collect proof of permission. Gather permits, zoning confirmation, any short-term-rental license, and HOA approval where it applies. 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.
7. Run the ratio on qualifying income. Divide the income the lender will use by the full PITIA. Any discount hits the income side only.
Lendmire’s piece How to Document Airbnb Income So a DSCR Lender Uses Actual Bookings goes deeper on the export and reconciliation steps. The casita adds one extra job: isolating its revenue from everything else.
Which Evidence Fits Your Situation?
The right proof depends on what the property looks like today. This table maps the common setups.
| Your situation | Primary evidence | Supporting proof |
|---|---|---|
| Casita hosted 12+ months | Platform payouts and bank deposits | Listing, permit, insurance |
| Casita hosted under 12 months | Actual months plus a projection | Market data report, appraiser analysis |
| Casita newly built or converted | Projection or appraiser rent analysis | Permit, certificate of occupancy |
| House leased, casita on Airbnb | Lease for house, payouts for casita | Separate listing, rent roll |
| Both structures on Airbnb | Separate payout streams | Two listings, unit names |
| Owner lives in main house | Generally outside DSCR | Conventional path may fit |
Lenders differ on how they combine two income types on one loan. Some count the long-term rent and the short-term income separately. Some use one blended method. A few count only one of them. Ask before you apply, because the answer changes the ratio on the same revenue.
Why the Appraisal Doesn’t Prove Your Airbnb Income
The appraisal supports the unit and the market rent. It does not prove what your casita earns per night. Agency material makes this point clearly, and it is useful as a contrast, since DSCR programs are not agency programs and set their own rules.
Fannie Mae’s appraiser update on short-term rentals says Form 1007 documents monthly market rent. The same guidance, as reproduced by the Nevada Real Estate Division, calls multiplying a nightly rate by 30 incorrect. That shortcut ignores furniture and equipment, other services, vacancy, and business expenses. It also says the form cannot estimate a nightly fee for a short-term rental.
Two more points matter for your file. McKissock says appraisers value only the real property, and the lender decides which income counts. Appraisers also increasingly decline requests to stretch the rent form to cover nightly income. So the platform and bank records you build carry the weight, and the appraisal backs them up.
What Happens When the Casita Has No History?
A new casita can still be considered, but the evidence changes from actual bookings to a projection. Lenders in the network typically accept an appraiser’s short-term-rental analysis or a third-party market data report. They usually apply a larger discount to a projection than to proven bookings. Many programs also want about 12 months of hosting experience from the borrower, and some set separate rules for owners with no track record.
A partial year helps. Show the months you have, and let a projection cover the gap if the lender allows it. The projection should describe the casita itself, not the main house.
The fallback is long-term market rent from the appraisal. It is usually lower than nightly potential on a strong unit. It is also the easiest number to document, so some investors qualify on it and treat Airbnb revenue as upside.
Where the General Rule Breaks
Here are the edge cases that change the outcome.
A casita with no kitchen or separate meter. A local appraiser may call it a guest suite rather than a unit. If so, it may add value to the property without supporting separate rent. One appraiser’s published example describes a casita without cooking facilities or separate meters reported inside total living area. Treat that as practitioner color, since local custom varies.
An owner-occupied main house. 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. If you live in the main house and rent only the casita, the property generally falls outside DSCR, and a conventional or FHA path may fit better.
Two income types on one loan. A long-term-leased house plus an Airbnb casita is allowed to exist. Whether the lender counts both, blends them, or counts one depends on the program. Get the treatment confirmed before you pay for an appraisal.
Regional square footage customs. Some markets include casitas in total living area by habit, which conflicts with the standard McKissock summarizes. Expect friction on comparable sales. A comp set with no casitas gives the appraiser little support for the unit’s value.
Unclear legal status. If short-term use is not permitted for the casita, the income may not count at all. Casitas are also sometimes not legally rentable as separate units. The permit chain matters as much as the bookings.
Structure type. A casita or main home built as a manufactured home, log home, or barndominium is not offered through these DSCR programs. Site-built is the safe assumption.
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.
A Worked Example, Shown as Ratios
Run the numbers on a modeled property: a main house leased long-term, plus a detached casita on Airbnb with 12 months of reconciled payouts. These are modeled assumptions, not market data.
Say the lease and the casita’s platform payouts together cover the full PITIA at roughly 1.40x on a gross basis. A lender then discounts the short-term portion to reflect higher operating costs and vacancy. After that discount, qualifying coverage might land near 1.15x. That still clears a 1.00 floor with room to spare.
Now change one input. Remove the casita’s reconciled statements, so the lender sees only the lease. Coverage on rent alone might sit around 1.05x. The file still works, but it has less cushion, and a larger down payment would be doing the lifting. The casita’s paperwork moved the ratio by about the same amount as a meaningful change in leverage.
One caution. DSCR compares income to PITIA only. Clearing 1.00 does not mean the property produces positive cash flow, since repairs, cleaning, management, utilities, vacancy, and capital costs sit outside the calculation. Judge the deal on both measures.
Where the Loan Terms Land
Across the network, short-term-rental purchases typically reach up to 75% LTV on the strongest files. Refinances run around 70% LTV, and cash-out on short-term-rental collateral tops out at 70%. Most programs look for a credit score around 640 or higher on these files. Loan sizes run up to $3,000,000 on standard programs, with smaller balances routed through select lenders.
On coverage, purchase files start at 1.00 with select programs, and refinance files also start at 1.00. A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. Stronger ratios open better pricing and leverage. A larger down payment can lift the ratio by lowering the payment, but it never erases credit floors, reserve rules, or property eligibility. All of this is subject to lender guidelines and individual underwriting.
The complete DSCR loans guide covers how these programs fit together.
Pre-Application Document Checklist
Gather these before you talk to a lender. Missing pieces slow every file.
- Platform payout statements for the full history period, with gross and net figures.
- Bank statements showing the matching deposits.
- Manager statements, if a manager runs the unit.
- Permit, zoning, short-term-rental license, and HOA approval where they apply.
- Insurance showing the casita as a covered structure used for short-term rental.
- Entity documents if the property is held in an LLC, subject to program eligibility.
- A short unit description: kitchen, bath, sleeping area, entrance, and utility setup.
- Proof of reserves, which vary by lender, leverage, loan size, and transaction type.
Common Mistakes and Fixes
| Mistake | Why it stalls | Fix |
|---|---|---|
| Payouts land in a personal account | Deposits can’t be traced | Route payouts to a dedicated account |
| One listing covers house and casita | Revenue can’t be split | Create a separate casita listing |
| Address differs across documents | Unit identity is unclear | Align listing, permit, insurance |
| Dashboard gross treated as income | Lender discounts it | Show net payouts and statements |
| Casita has no kitchen | May not count as a unit | Confirm classification first |
| Permit status unclear | Income may not count | Resolve permission before applying |
One pattern shows up often in casita files. The income is real, but the listing, the insurance, and the appraisal each call the structure something different. Cleaning that up before submission costs little. Cleaning it up after a lender flags it costs a lot of back-and-forth.
Frequently Asked Questions
Does a detached casita count as a separate unit for a DSCR loan?
It can, if the appraiser reports it as an ADU with its own kitchen, bath, sleeping area, and entrance. A room without cooking facilities is often treated as extra living space instead. The lender decides how the casita is treated, so confirm it before the appraisal is ordered.
Can I use the casita’s Airbnb income if I live in the main house?
Generally not with a DSCR loan. These programs are built for non-owner-occupied investment properties, so a house-hack with an owner-occupied main house usually moves to a conventional or FHA path. If you later move out and the whole property becomes a rental, DSCR can come back into play.
Is my Airbnb dashboard enough to prove the income?
No. The dashboard shows gross revenue, and lenders discount that figure. They want payout statements that reconcile to bank deposits. Tag both to the casita listing so the revenue can be isolated from the main house.
How much hosting history do I need?
Many programs look for about 12 months of landlord or host experience on short-term-rental files. With less, a lender may rely on an appraiser’s analysis or a market projection, usually with a larger discount applied. Some owners qualify on long-term market rent and keep the Airbnb income as extra margin.
What if the casita is not permitted for short-term rental?
Then the income may not count, and it can create bigger problems. Resolve permission first, then build the file around it.
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. Call 828-256-2183 or request a quote.
For current guidelines and terms, see Lendmire’s DSCR loan programs page.
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.
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. McKissock: ADU vs. two-family property
2. McKissock: Understanding gross living area
3. McKissock: Form 1007 and short-term rental appraisals
4. Fannie Mae appraiser update on short-term rentals
5. Nevada Real Estate Division: short-term rental materials
6. Sacramento Appraisal Blog – casita square footage
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 You Get a DSCR Loan on a New Lease Before Any Rent Is Collected? · How to Shop and Document Rental Insurance Before a DSCR Loan · How to Refinance a Newly Leased Rental With 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
Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.