VA loans with ADU rental income — qualifying with a casita on your Arizona property
Arizona has thousands of properties with detached casitas, granny flats, or backyard ADUs. Some are rented; some have potential. For VA qualification, the rules on counting that rental income are specific.
Existing ADU rental income — how to document it
If the ADU is currently rented under a 12-month lease, VA underwriting accepts 75% of the documented rent toward qualifying income. Need: signed lease, last 2 months of bank deposits showing rent received, and rental income on most recent tax return.
If rented less than 12 months or income isn't on a tax return yet, lender overlay varies. Cornerstone's VA channel works with 6-month documentation in some scenarios.
Projected ADU income — Form 1007 path
If the ADU isn't rented (vacant, used by family, owner-occupied), VA underwriting needs an appraiser's opinion of fair market rent. The appraiser uses Form 1007 (Single Family Comparable Rent Schedule) to estimate based on comparable rentals.
The estimated rent is haircut to 75% for qualifying purposes. So a $1,600/month estimate counts as $1,200/month in DTI calculation.
Owner occupancy requirement
VA requires the buyer to occupy the main dwelling as primary residence within 60 days of closing. The ADU stays available for rental. This is the same rule that prevents using VA loans for pure investment properties.
Common Phoenix-metro use case: buy a primary residence with a backyard casita. Owner moves in. Casita gets rented (long-term tenant or mid-term furnished). Rental income offsets the mortgage.
Common questions
Can I use short-term rental (Airbnb) projections for the ADU?
VA accepts long-term rental income only for qualifying. Short-term Airbnb projections from AirDNA don't count for VA — they do for some non-QM DSCR loans, which is a different product.
Does the ADU need to be a legal accessory dwelling?
Yes — the city or county must permit it as an ADU/casita. Phoenix updated its ADU code in 2024 making more existing structures legal. Worth verifying for an unpermitted casita scenario.
Can I qualify based on ADU rental from day one?
If there's an existing lease in place at close, yes. If the unit will be marketed for rent after close, the 75% appraised market rent counts but underwriters may want a 30-90 day buffer.
Are 4-unit VA loans possible?
Yes — VA allows up to 4-unit primary residence. The 4-unit math is more complex; we model it case by case.
How Mike + Cornerstone help
Arizona ADU/casita financing is a steady part of my book. We'll review the property's permit status, work the rental-income math, and structure the VA loan to maximize qualifying income from the rental side without breaking the owner-occupy rule.
Talk to Mike first Get pre-approved
No pressure, no commitment. Free 20-minute consult. Mike will look at your scenario and tell you straight whether this works for you.