Short-Term Rental Loans in Washington: Financing the Airbnb, Honestly
Program and regulatory figures verified July 24, 2026. Details change; confirm your scenario with us.
The lending question on a Washington short-term rental is simple: can the revenue be documented, and is the operation legal (and transferable) where it sits? Get those two right and the DSCR structure does the rest.
How short-term rental income is counted
Three lanes, in order of underwriting strength:
- Operating property, 12 months of history: trailing Airbnb or VRBO statements support the ratio directly. The cleanest file, and the reason an established, permitted STR is worth a premium at purchase.
- No history, long-term-rent fallback: the appraiser's Form 1007 market rent qualifies the loan as if it were a long-term rental. If the deal pencils on that rent, the STR upside is margin, not a lending assumption. This is the structure we recommend most often in Washington.
- No history, STR projection: some programs accept a market-data projection with a haircut, commonly 20–25% off (a few use 70–80% of projected revenue). More down and deeper reserves usually ride along.
Program specifics vary, and this is where a direct lender who writes these weekly earns the fee: we tell you which lane your property fits before you're under contract. Ratio mechanics: the Washington DSCR guide.
Permit first, and does it survive the sale?
Washington adds a wrinkle most states don't: in the capped resort markets, a permit doesn't automatically transfer to the buyer. Leavenworth and the Chelan County 98826 area stop transferring permits on sale after September 26, 2026, and the San Juan Islands run hard island caps with a legacy-amnesty window that already closed. On any deal in a capped zone, the seller's booking history is not proof that you can operate, so we structure the loan to pencil on long-term rent and treat STR income as upside you confirm separately. That conservatism costs nothing when the permit is clean and saves the deal when it isn't. The full status table: STR rules by city.
The 30-day line and the mid-term lane
Here is the angle the capped cities accidentally created. Washington's lodging taxes and most city STR ordinances apply to stays under 30 days. A furnished rental booked for 30 or more continuous days owes no B&O and no retail sales tax, and it sits outside the STR permit regimes entirely. Seattle's hospital systems and traveling clinicians, and Spokane's medical district, book exactly that length. A furnished mid-term unit in a capped submarket can earn above the long-term comp without needing an STR license at all. We underwrite these on the lease or on market rent; it is one of the quieter ideas in Washington rental investing, and it dodges the permit fight entirely.
The statewide rules your operating model carries
Underwriting uses gross rent, but your pro forma should carry the statewide floor: RCW 64.37 requires $1 million in liability insurance (or a platform providing equal coverage) and Department of Revenue registration, and the lodging-tax stack (retailing B&O, retail sales tax, and location-coded local taxes, plus Seattle's convention-center tax) rides on every under-30-day booking. The platforms collect and remit the marketplace-administered pieces. Model those costs, confirm the city permit, and the DSCR file itself stays clean: the city rules and the Seattle house-hack angle.
No pressure, no obligation, and no salesy follow-up: a 20-minute call with our team, real numbers, and a straight answer on whether the deal pencils.
Frequently asked questions
Can I finance an Airbnb with a DSCR loan in Washington, and how is the income counted?
Yes. An operating STR with 12 months of platform statements qualifies on its trailing revenue. A property without history qualifies on the appraiser's Form 1007 market rent, or on a revenue projection with a haircut (commonly 20–25%, some programs 70–80% of projection) where allowed. Down payment and reserves scale with how aggressive the income documentation is.
Does the seller's Airbnb history transfer when I buy in Leavenworth or the San Juans?
Not reliably. In capped Washington markets a permit may not transfer on sale: Leavenworth's Chelan County area stops transferring permits after September 26, 2026, and the San Juan Islands run hard caps. If your own permit path isn't confirmed, the seller's booking history can't be used, so we qualify the loan on long-term rent and treat STR income as upside.
What is a mid-term rental and why does 30 days matter in Washington?
A furnished rental booked for 30 or more continuous days. At that length the stay owes no B&O and no retail sales tax, and it falls outside Washington's city STR ordinances entirely, since they define short-term as under 30 days. Traveling medical staff are the core demand. It is the way to earn above long-term rent without a permit fight.
Do I need short-term rental insurance to get financing in Washington?
The state requires it regardless of the loan: RCW 64.37 makes a host carry $1 million in liability insurance, or book only through a platform that provides equal or greater coverage. Register with the Department of Revenue for taxes as well. Underwriting uses gross rent before lodging taxes, but your operating model should carry the insurance and the tax stack.
Mike Certo · NMLS #260555 · Cornerstone First Mortgage NMLS #173855 · Equal Housing Lender. Educational content, not a loan commitment and not legal or tax advice. Washington's rent-cap figures, city and county STR rules, and tax figures change; verify current requirements with the city or county, your CPA, or a Washington real estate attorney before you buy. Loans are subject to buyer and property qualification.