Buying Before You Sell in Boise
Program and regulatory figures verified September 25, 2026. Details change; confirm your scenario with us.
Boise is the Idaho market where the loan limit is rarely the problem. The ratio is, and the departing home's tax line quietly grows in the middle of the move.
The shape of a Boise move-up
At $493,522 typical against Ada County's $832,750 ceiling, a Boise household moving up inside the county usually stays comfortably in agency financing. That matters because it decides the rulebook. Agency means Fannie Mae B3-3.8-05 governs the departing residence, with a published offset, published documentation and a published reserve requirement, rather than an individual investor's overlay.
What actually binds
With loan size rarely the issue, the constraint is carrying two payments. Underwriting counts the full PITIA on the departing home and the new one until something removes it. Options are on the structures page; the ratio mechanics on qualifying without selling.
The Ada County tax piece
Idaho Code 63-602G(1) exempts the lesser of $125,000 or 50% of value, and at $493,522 a typical Boise home is well past the $250,000 crossover, so the exemption is the flat $125,000. That is 25.3% of value.
Subsection (2)(a) conditions it on owner-occupancy. Once you are living in the new house the old one loses the exemption, and its taxable base rises by up to $125,000. Estimate the departing PITIA using the unexempt figure, because that is the number underwriting tests. See the exemption page.
Direction and reserves
Boise City rose 1.4% year over year, the slowest of Idaho's seven metros alongside Idaho Falls, though still rising. Rising markets support shorter expected marketing times and lighter reserve tiers. Statewide comparison on the move-up market page.
Moving east into Teton County changes the rulebook, since the limit there is $1,249,125. See the jumbo page.
Frequently asked questions
What is the conforming loan limit in Ada County for 2026?
$832,750 on one unit, the FHFA baseline. With a typical Boise City home value of $493,522 in August 2026, that leaves roughly $339,000 of headroom, so most move-ups inside the county stay within agency financing.
What is the main obstacle to buying before selling in Boise?
The debt-to-income ratio rather than the loan limit. Underwriting counts the full PITIA on both the departing home and the new one, so the question is which structure removes or offsets the departing payment.
How much is Idaho's exemption worth on a typical Boise home?
The flat $125,000, because a typical Boise City home at $493,522 is well above the $250,000 crossover in Idaho Code 63-602G(1). That is 25.3% of value, and it comes off the departing home once you move out.
Mike Certo · NMLS #260555 · Cornerstone First Mortgage NMLS #173855 · Equal Housing Lender. Educational content about financing, not a loan commitment and not legal, tax, or real estate advice. Idaho's homeowner's exemption is administered county by county under Idaho Code 63-602G and 63-703, and eligibility depends on your facts; your county assessor, your CPA or an Idaho attorney, and your real estate agent each handle their own part. Loans are subject to borrower and property qualification.