The County Has No Permit for the Shop: Financing Unpermitted Structures in Montana

The listing says 2,400 square feet. The county says 1,700. The difference is a basement somebody finished in 2004 and a bedroom addition off the back that nobody ever pulled a permit for.

On older Montana properties this is not an edge case. In counties that have had limited building regulation historically, or in areas outside any zoning jurisdiction at all, a shop that went up over a summer without paperwork is completely normal. So is a bathroom added to a barn. So is a mother-in-law setup over the garage.

None of this automatically kills a loan. What it does is create three separate questions that people collapse into one, and get confused when the answers do not match.

Three questions, not one

1. Is it legal? A county code and permitting question. Different answer in every jurisdiction, and in some parts of Montana the honest answer is that no permit was ever required.

2. Does it appraise? An appraiser's judgment about whether the market pays for it, and whether the work is safe and workmanlike.

3. Will the lender lend? A guideline and investor question, downstream of the first two but not determined by either.

You can have a structure that is technically unpermitted, that the appraiser gives full value to, and that the lender accepts without comment. You can also have a structure that was fully permitted and that the appraiser still declines to give square-footage credit to because it does not meet the market's definition of finished living area. These are independent.

[keyfact] "Unpermitted" is not a lending status. The lending questions are whether the work appears structurally sound and workmanlike, whether it is typical for the market, and whether the appraiser can support value for it. Permits are evidence toward those questions, not the questions themselves. [/keyfact]

Question one: is it legal

Montana permitting is county-level and uneven. Some counties have adopted building codes with active enforcement. Some have limited jurisdiction, applying only inside city limits or within a defined jurisdictional area. Some rural areas have effectively no building permit requirement for a private outbuilding.

Which means the first thing to establish is not "was there a permit" but "was one required." Call the county building department and the planning office with the parcel number. This is a free phone call and it is frequently the entire answer.

Where a permit was required and never obtained, the options are:

• Retroactive permitting. Many jurisdictions will permit existing work after the fact. Expect an application, a fee (sometimes penalized) and inspection. Where the work is concealed, inspection can mean opening walls. Timeline realistically runs weeks to several months, and it depends on the county's staffing and the season.
• Removal or reversion. Occasionally the cheapest cure is taking a structure back out, or reverting a converted space.
• Living with it. In jurisdictions where no permit was required, there is nothing to cure.

Separately, note septic capacity. Adding a bedroom without adding septic capacity is a real problem independent of the building permit. If the addition created a fourth bedroom on a three-bedroom permitted system, that is the issue to solve, and it is covered in septic, legal access and easements.

Question two: does it appraise

The appraiser has several options and will pick one based on evidence.

Include it at full contributory value. Common where the work is clearly well built, comparable properties in the area also have unpermitted improvements, and the market pays for them. Fannie Mae's guidance contemplates this: additions completed without permits can be acceptable when the appraiser notes the work, assesses its quality and appeal, and comments on the effect on marketability.

Include it, but not in the square footage. A finished basement is frequently valued as finished below-grade area rather than folded into the above-grade gross living area, regardless of permits, because that is how the market and appraisal convention treat it. Buyers read this as the appraiser "not counting" their space. It is not a penalty; it is a category.

Value it at nothing. If the appraiser cannot support that the market pays for it, or the workmanship is questionable, the improvement contributes zero. The property is still financeable. It is just worth what it was worth without the shop.

Call for repair or further inspection. If the work looks unsafe (obvious structural, electrical or plumbing concerns), the appraiser conditions the report, and now you are back in question one with a deadline.

The practical consequence of a zero-value call is not a declined loan. It is a lower appraised value, which means a bigger down payment or a renegotiation. That is a price problem, and price problems are negotiable.

Question three: will the lender lend

Investor overlays are where this gets unpredictable. Some investors are entirely comfortable with unpermitted improvements the appraiser has addressed. Others require evidence of permitting for any addition affecting habitable square footage. Some draw the line at additions but not outbuildings.

There is no universal rule, and the standards move. What is worth knowing is that the answer is knowable early: your loan officer can ask the specific question against the specific investor before the appraisal is ordered, if you tell them what you know about the property.

The people who get hurt are the ones who never mention it, because they assumed it did not matter, and it surfaces in the appraisal report in week four with a two-week closing window left.

The negotiation point

Here is the practical advice this article exists to deliver.

Raise unpermitted work in the offer, not in week five.

Once the appraisal has flagged it and your closing date is nine days out, you have almost no leverage. The seller knows you are committed, your earnest money is at risk, and your rate lock is expiring. If retroactive permitting takes six weeks, you are asking for an extension from a position of weakness.

If instead you write the offer knowing about the addition, you can:

• Make the seller's completion of retroactive permitting a condition of closing, with a realistic timeline built into the contract.
• Price it in, taking the property with the improvement valued at zero and paying accordingly.
• Ask for a credit sized to the permitting cost and take on the process yourself after closing, where it is your problem on your schedule rather than a closing condition.

All three are reasonable. All three require knowing before you sign.

[keyfact] Compare the listing's square footage to the county assessor's record before you write the offer. Cadastral records are public at cadastral.mt.gov. A material discrepancy is the single best early indicator of unpermitted work. [/keyfact]

Who is responsible

Nobody is, by default. There is no rule that makes the seller cure it. Whatever the contract says is what governs, which is exactly why this belongs in the offer.

Sellers frequently do agree, because the problem does not go away: the next buyer's lender asks the same question. But that argument works much better before you are under contract than after.

Where this fits

• The full rural file, in order: financing a Montana home on acreage
• If the structure itself is unconventional, barndominium, log, post-frame: will a barndominium or log home appraise in Montana
• Buying ground and building the shop properly the first time: land and lot financing

Found a square-footage discrepancy on a property you like? Send us the address before you write the offer and we will tell you what your specific loan will need. No credit pull.