What Makes a Condo Non-Warrantable? The 8 Triggers That Kill Mortgages
"Non-warrantable" is one of those terms that sounds bureaucratic until it directly affects you — usually right when a buyer's loan officer calls to say financing just fell apart. If you're trying to understand what actually makes a condo non-warrantable, here's the answer straight from Fannie Mae's own Selling Guide.
What "Non-Warrantable" Actually Means
A condo is "warrantable" when Fannie Mae or Freddie Mac will back a conventional mortgage on a unit in that building. When a building fails to meet their eligibility standards, it becomes "non-warrantable," and conventional lenders generally can't sell loans on units in that project into the secondary market.
Fannie Mae's Selling Guide spells out the specific conditions that make a condo project ineligible. Below are the verified triggers, straight from that guide.
1. A Single Entity Owns Too Many Units
Fannie Mae limits how much of a building one owner — an individual, investor group, partnership, or corporation — can control. In projects with 5 to 20 units, a single entity can own no more than 2 units. In projects with 21 or more units, a single entity can own no more than 20% of the total units (Fannie Mae Selling Guide B4-2.1-03, Ineligible Projects). Units under any rental or lease arrangement, including lease-purchase deals, count toward this calculation (Fannie Mae Selling Guide B4-2.1-03).
There's a narrow waiver: if the single entity owns no more than 49% of units, is current on all HOA assessments, there are no pending special assessments, and there's evidence the entity is actively marketing units to bring concentration down toward 20% or less, a purchase transaction may still qualify (Fannie Mae Selling Guide B4-2.1-03).
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2. Too Much Commercial or Nonresidential Space
If more than 35% of a condo or co-op project's total space is used for nonresidential or commercial purposes, the project is ineligible (Fannie Mae Selling Guide B4-2.1-03). This rule exists because heavy commercial use changes the risk profile of the building and can complicate insurance and financial stability. Separately, projects in Special Flood Hazard Areas with commercial space exceeding 25% of square footage may need supplemental or private flood insurance, since standard National Flood Insurance Program coverage may be inadequate (Fannie Mae Selling Guide B4-2.1-03).
3. Reserve Funding Falls Short
Under a Full Review, Fannie Mae requires the HOA budget to fund replacement reserves for capital expenditures and deferred maintenance of at least 10% of the annual budgeted assessment income (Fannie Mae Selling Guide B4-2.2-02, Full Review Process). That minimum is rising to 15% for loan applications dated on or after January 4, 2027, under Fannie Mae's March 2026 Lender Letter (Fannie Mae Lender Letter LL-2026-03). A qualifying reserve study can substitute for the flat percentage, but effective for applications dated on or after August 3, 2026, that study must support the project's budget at the study's highest recommended funding level — baseline funding (letting the reserve balance approach zero) is no longer accepted (Fannie Mae Lender Letter LL-2026-03).
4. Ongoing Litigation Tied to Safety or Structure
A project is ineligible if the HOA, co-op corporation, or the project's developer/sponsor is named in pending litigation relating to the safety, structural soundness, habitability, or functional use of the project (Fannie Mae Selling Guide B4-2.1-03). Not every lawsuit disqualifies a building — Fannie Mae allows exceptions for minor litigation, such as non-monetary neighbor disputes, fully insured claims where the carrier has agreed to defend, or cases where anticipated damages don't exceed 10% of the project's funded reserves (Fannie Mae Selling Guide B4-2.1-03). But construction defect litigation where the HOA is the plaintiff, and personal injury or wrongful death claims, generally do not qualify as "minor" (Fannie Mae Selling Guide B4-2.1-03).
5. Critical Repairs or Unsafe Conditions
If a structural or mechanical inspection report — completed within three years of the lender's review — indicates critical repairs are needed, or if there's an active evacuation order or required regulatory action, the project is ineligible (Fannie Mae Selling Guide B4-2.1-03). This is where structural inspection findings, including those required by state laws like Florida's milestone inspection statute, can directly affect financing.
6. The Project Has an "Unavailable" Status in CPM
Regardless of which review process a lender uses, if a project shows an Unavailable status in Fannie Mae's Condo Project Manager (CPM) database or on the Desktop Underwriter Underwriting Findings report, it is ineligible for purchase by Fannie Mae (Fannie Mae Selling Guide B4-2.1-03). This status typically results from one of the other issues on this list — inadequate reserves, litigation, or critical repairs.
7. The Project Type Itself Is Ineligible
Some projects fail warrantability just by their structure. Fannie Mae's Selling Guide lists categories including timeshare, fractional, or segmented ownership projects; projects operated as a hotel or motel; continuing care facilities; projects where the HOA operates non-incidental businesses like a restaurant or spa; multi-dwelling unit projects; and projects involving property that isn't real estate, such as houseboats or boat slips (Fannie Mae Selling Guide B4-2.1-03).
8. The Project Is Terminating or Insolvent
Projects that are terminating their condo or co-op status, or that are involved in insolvency proceedings, are ineligible for Fannie Mae financing (Fannie Mae Selling Guide B4-2.1-03).
Why This Is About to Matter for More Buildings
Historically, many established condos avoided this level of scrutiny by qualifying for Fannie Mae's "Limited Review" process, a streamlined path that didn't dig into HOA finances as deeply. That option is being retired for loan applications dated on or after August 3, 2026 (Fannie Mae Lender Letter LL-2026-03). After that date, nearly every condo transaction will go through a Full Review or a Waiver of Project Review, both of which involve checking the exact triggers listed above (Fannie Mae Selling Guide B4-2.1-03).
The one bit of good news: Fannie Mae also expanded its Waiver of Project Review to cover new and established condo projects with 10 or fewer units, effective immediately as of the March 2026 letter (though 5-10 unit projects that are part of a larger master association don't qualify) (Fannie Mae Lender Letter LL-2026-03). Smaller buildings may face a lighter-touch review than larger ones.
What Owners and Boards Can Do
Non-warrantability rarely happens overnight. It's usually the result of one issue compounding over time — reserves fall behind, deferred maintenance builds up, insurance costs spike, delinquencies rise, and eventually a lender flags the project. The earlier your board identifies which of these eight triggers is closest to a problem, the more time you have to fix it before it costs a sale.
If you're a buyer, ask for the HOA questionnaire, budget, and most recent reserve study before you fall in love with a unit. If you're a board member, run through this list at your next budget meeting and be honest about where your association stands.
Frequently Asked Questions
Does one non-warrantable trigger affect the whole building or just one unit? The whole building. Fannie Mae's eligibility review applies at the project level, so if any trigger applies, every unit in that project is affected, not just the unit involved in the transaction (Fannie Mae Selling Guide B4-2.1-03).
Can a non-warrantable condo still be sold? Yes, but typically only with cash, a portfolio loan, or specialized non-warrantable condo financing, which usually carries a higher interest rate than a conventional mortgage. This significantly shrinks the buyer pool.
Is a lawsuit against the HOA always a dealbreaker? No. Fannie Mae allows exceptions for minor litigation, including non-monetary disputes and fully insured claims, but litigation tied to the safety, structural soundness, habitability, or functional use of the project generally disqualifies the project (Fannie Mae Selling Guide B4-2.1-03).
Will the reserve requirement increase to 15% make more condos non-warrantable? It could. Associations funding reserves between the current 10% minimum and the new 15% threshold, without a qualifying reserve study, will need to raise contributions before the January 4, 2027 effective date for loan applications (Fannie Mae Lender Letter LL-2026-03).
Find Out Where Your Condo Stands
Instead of guessing which of these eight triggers might apply to your building, get a clear picture upfront. CondoScores.com offers a free warrantability score built around the same reserve, delinquency, litigation, and structural factors Fannie Mae reviews. Check your building's score today at condoscores.com before a lender — or a lost sale — tells you the hard way.
Is your building ready for these rules?
Answer 12 plain-English questions and get a free readiness score against Fannie Mae's published standards — with the exact rule behind every point. No account needed.