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Non-Warrantable Condos in Big Sky: Why Most Lenders Decline Them

Investor concentration, rental programs, commercial square footage and thin reserves. A resort project can be excellent and still fail every agency test.

The short answer

A large share of Big Sky condominium projects fail agency warrantability because of investor concentration, short-term rental programs, commercial space in the building or thin reserves. Fannie Mae and Freddie Mac will not buy those loans, so most lenders simply decline. Portfolio and non-QM paths exist and most buyers are never told.

Last reviewed September 2026 · 9 min read

A buyer finds a Big Sky condo, gets a pre-approval, writes an offer, and three weeks later the lender comes back with a sentence that ends the deal: the project is not warrantable.

Nobody explained the word before the offer. It could have been checked in an afternoon.

What warrantable means

When you finance a condominium, the lender is not only underwriting you. It is underwriting the project: the whole association, its finances, its ownership mix and its legal exposure.

"Warrantable" means the project meets Fannie Mae's or Freddie Mac's condominium eligibility requirements, which is what allows the loan to be sold to them after closing. Nearly every retail lender's entire business model is originating loans and selling them to the agencies. If a project fails the project review, that lender cannot sell the loan, so it does not make the loan. The decline is not a judgment about the building. It is a distribution problem.

This is also why the answer is binary and abrupt. There is no partial credit in a project review.

Why a resort market fails it so often

The agency condo rules were written with a picture in mind: an owner-occupied residential building where most units are primary residences, the association is funded, and the risks are ordinary. Big Sky is a different animal, and it fails on several axes at once.

Investor concentration. Agency reviews look at the share of units that are not owner-occupied (investor-owned, second-home and rental units) with the thresholds depending on the review type and whether the subject loan is a primary residence. In a resort market where most units are second homes or income properties, this test is frequently the first one a project fails.

Short-term rental programs. A project that operates like a hotel is not a residential condominium in agency terms. Mandatory rental pooling, revenue-sharing arrangements, front desk and daily housekeeping services, central reservation systems, and restrictions on an owner's right to occupy their own unit all push a project toward being treated as a condotel, a category the agencies do not finance at all. Note the distinction that matters: an owner who chooses to rent their unit is a different thing from a project structured around renting units. The first is common and manageable. The second is usually fatal for agency financing.

Commercial space. Projects with substantial non-residential square footage (retail, restaurant, spa, conference or hotel space) get scrutinized on the commercial share of total floor area. Mixed-use is the norm in a resort village, and it is an eligibility question rather than an amenity.

Reserves and the budget. Agency review looks for an association budget that funds replacement reserves at a meaningful share of assessments and that provides adequately for deferred maintenance. Underfunded reserves, or a reliance on special assessments in place of reserve funding, are a common failure point.

Litigation and structural issues. Pending litigation involving the association (particularly anything touching safety, structural soundness, habitability or construction defects) will stop a project review. So will known deferred maintenance affecting structural integrity. Post-Surfside, the agencies tightened this considerably and it is now one of the most common reasons a previously financeable project stops being financeable.

Single-entity ownership. Limits apply on how many units one owner or entity can control. In smaller projects, where a developer or a single investor holds several units, this can be triggered by a handful of units.

[keyfact] None of these are unusual for a mountain resort community. A project can be well-run, well-located, financially sound and desirable, and still be non-warrantable, because the tests measure fitness for agency purchase, not quality. [/keyfact]

The paths that actually exist

Here is the part most buyers are never told: non-warrantable does not mean unfinanceable. It means the loan cannot be sold to Fannie or Freddie, so it has to go somewhere else.

Portfolio lending. A bank or credit union that keeps the loan on its own balance sheet answers to its own credit committee, not to an agency project review. Portfolio lenders can and do finance non-warrantable projects. They set their own conditions, they look hard at the association's finances, and they may want a larger down payment and a stronger reserve position.

Non-QM and specialty investors. A set of investors specifically underwrite non-warrantable condominiums as a product. Terms are program-specific and they read the project documents closely, but the category exists precisely because resort markets exist. Our self-employed and non-QM page covers the broader family of these products.

Higher down payment. Across most of these paths, the lever that opens the door is equity. More down means less exposure to the project-level risk the guideline was worried about, and it is frequently the difference between a decline and an approval.

Pricing. Expect a rate above conforming and above standard jumbo. How far above depends on the program, the project, the down payment and the market that week, so any number quoted in an article would be misleading. Ask for a rate on the specific project and structure. The honest framing is that you are paying for a smaller pool of capital, not for a defect in the property.

HOA dues are underwriting, not a line item

This is where Big Sky files fail even when the project passes.

Your monthly association dues are part of your housing payment for debt-to-income purposes. Not an afterthought, the same weight as principal, interest, taxes and insurance. In a resort project with amenities, ski access, shuttle service, plowing, and building maintenance, dues can approach or exceed the mortgage payment itself.

Two consequences. First, a buyer pre-approved on price alone can be well over the qualifying limit once real dues are entered. Second, dues move. A special assessment or a reserve-driven increase changes the payment after closing, and in a project with thin reserves, that risk is not hypothetical.

Ask for the current dues, the last three years of dues history, the reserve study, the current budget, and any special assessment that has been discussed. Not just the number on the listing.

Resort tax. Big Sky levies a local resort tax on certain goods and services within the district, and the Big Sky Resort Area District also administers a resort tax on new construction. It is not part of your mortgage escrow, but it is part of the cost of owning and building there, and it belongs in your budget conversation rather than as a surprise. Confirm current rates and what they apply to with the district directly.

How to find out before you offer

The order matters. Do this before the offer, not during the inspection period.

  1. Ask the listing agent whether the project is warrantable and whether recent buyers financed conventionally or paid cash. An all-cash sales history in a project is a signal.
  2. Get the project documents early: budget, reserve study, most recent financials, the condo questionnaire if one exists, the CC&Rs, and any rental program agreement.
  3. Ask specifically about litigation, special assessments and deferred maintenance. These are the fast fails.
  4. Have a lender run the project, not just you. A lender who works this market can usually tell you within a day or two which bucket a project is in, and many projects are already known.

[keyfact] Some projects are genuinely not financeable by anyone, on any terms. That is a real outcome and pretending otherwise wastes everyone's time. Finding it out in week one costs a phone call; finding it out in week three costs your earnest money and your next-best option. [/keyfact]

Two things usually travel with these files. Loan size is the first: most Big Sky purchases land above the conforming limit, and when a Montana home becomes a jumbo loan covers what changes there. The second is the tax classification, since a unit held as a second home or a short-term rental is taxed differently than a primary residence, which changes the payment you qualify on.

What we do with these

We tell you which category a project falls into before you write, and we are straight about whether we are the right lender for it. If a project needs a portfolio balance sheet we do not have, we would rather say that in week one than run out your contract.

See our Big Sky market page for local context and our Montana jumbo page for the higher loan amounts these purchases usually involve. If you have a specific project in mind, send it to us and we will look at it.

Common questions

What makes a condo non-warrantable?

Failing Fannie Mae's or Freddie Mac's project eligibility rules. The common triggers in a resort market are a high share of investor or second-home ownership, a mandatory or hotel-like short-term rental program, a large share of commercial square footage, replacement reserves funded below the required level, pending litigation involving the association, deferred maintenance affecting structural integrity, and one entity owning too many units.

Can I still get a loan on one?

Usually yes, through a different channel. Portfolio lenders keep the loan on their own balance sheet and answer to their own credit committee rather than an agency project review. A set of non-QM investors underwrite non-warrantable condominiums as a deliberate product. Both read the association's finances closely and set their own conditions, but the category exists precisely because resort markets exist.

How much more do I need down?

More equity is the main lever that opens these files, but there is no single number: it is set by the specific program, the specific project and your overall profile. Treat any figure quoted before someone has reviewed the project documents as a guess. Ask for terms on the actual project.

Does the rental program hurt me?

It depends on the structure, and the distinction matters. An owner who chooses to rent their unit is ordinary and manageable. A project built around renting units (mandatory rental pooling, revenue sharing, front desk and daily housekeeping, central reservations, limits on an owner's right to occupy) pushes the project toward condotel treatment, which the agencies do not finance at all.

How do I find out before I offer?

Ask the listing agent whether the project is warrantable and how recent buyers financed; an all-cash sales history is a signal. Then get the budget, reserve study, recent financials, CC&Rs and any rental program agreement, and ask directly about litigation, special assessments and deferred maintenance. A lender who works this market can usually place a project within a day or two, and many projects are already known.

Sources

Where the conforming limit sits in Montana, what changes above it, and the resort-market condo files nobody else will touch.

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Bison Ventures LLC dba Bison Mortgage, NMLS #2257632. Equal Housing Lender. This article is general information, not a commitment to lend, an offer of credit, or a rate quote. Program terms, rates and limits change and are subject to underwriting approval.