Buying a House With Unpermitted Work in Tennessee

What happens if you buy a house with unpermitted work in Tennessee?

Unpermitted work is not automatically a dealbreaker, but it is your problem the moment you close. Tennessee sellers must disclose known room additions, structural modifications, or repairs made without permits on the Residential Property Condition Disclosure, and your appraiser decides whether that finished space counts toward value at all. The three real risks are a lower appraisal, a lender who will not fund until the work is corrected, and an insurance claim denied later on square footage the county never approved.

By Khristian Schlemmer | September 29, 2026

Here is the scenario I get calls about constantly. You are under contract on a house in Lebanon or Mt. Juliet. The listing said 2,400 square feet. The inspector walks the finished basement, looks at the bonus room over the garage, and says the words that stop the transaction cold: "I do not think this was permitted."

Now you have a decision to make, and a clock running on your inspection period.

The good news is that unpermitted work is more common than most buyers expect, especially in Wilson County where a lot of homes have added decks, converted garages, finished basements, and built shops on acreage over the years. Plenty of those deals close just fine. But they close because somebody handled it correctly, not because it worked itself out.

Who actually decides: the appraiser, not the inspector

This is the part buyers get backwards, and it costs them.

Your home inspector will flag unpermitted work as an observation. That is useful information, but the inspector has no authority over your loan. The appraiser does.

Under Fannie Mae guidelines, when an appraiser identifies an addition that was built without permits, they must comment on the quality and appearance of the work and its effect on market value. More importantly, any value they assign to that unpermitted space has to be supported by comparable sales showing the local market actually accepts similar work.

Read that again, because it is the whole ballgame. If the appraiser cannot find comps in your area where unpermitted finished space carried value, that space contributes nothing to the appraised number.

So the practical outcome looks like this:

• You agreed to pay $525,000 for a 2,400 square foot house

• 500 of those square feet are an unpermitted basement finish

• The appraiser measures the home per the ANSI standard, excludes or heavily discounts the unpermitted area, and lands well under contract price

• You are now staring at an appraisal shortfall on space you thought you were buying

That shortfall is not a paperwork problem. It is real money out of your pocket or a renegotiation, and the difference in Wilson County at roughly $218 per square foot adds up quickly.

FHA is stricter still. FHA appraisers evaluate safety, security, and soundness, and they can issue the appraisal "subject to" repairs being completed and reinspected before you close. If an unpermitted addition has a questionable electrical tie-in or no egress window in a basement bedroom, that is not a negotiating point. It is a condition of funding.

What Tennessee sellers are required to tell you

Tennessee gives you a real tool here, and most buyers never read it closely.

The Residential Property Condition Disclosure asks the seller two consecutive questions that go straight at this issue:

• Whether there have been room additions, structural modifications, or other alterations or repairs made without necessary permits

• Whether there have been room additions, structural modifications, or other alterations or repairs not in compliance with building codes

The standard is actual knowledge. A seller who genuinely did not know about work a prior owner did is not on the hook for it. But a seller who finished the basement themselves and checked "no" on both questions has a problem, and you have a remedy.

Pull that disclosure out and look at those two lines before your inspection period ends. If the seller answered "no" and your inspector says otherwise, that conversation changes completely. If the seller answered "yes" or "unknown," you were told, and the due diligence is on you.

One more thing worth knowing: the disclosure form does not ask about square footage. Nobody is warranting the number in the listing. Verifying finished square footage is your job, and the appraiser's.

The Wilson County reality: what needs a permit here

Local rules matter more than the general internet advice on this topic, so here is what applies in unincorporated Wilson County. The Building Codes Division requires a permit for:

• New construction

• Additions

• Remodels involving major load changes, use changes, or dwelling type changes

• Pools

• Accessory structures over 200 square feet, including decks, sheds, carports, barns, detached garages, shops, pavilions, and pergolas

That 200 square foot threshold catches a lot of people. A 12 by 16 deck is 192 square feet and clears it. A 12 by 20 deck is 240 and does not. Half the "I did not think I needed a permit" stories in this county live in that gap.

If the property sits inside Lebanon or Mt. Juliet city limits, the city codes department has jurisdiction rather than the county, and the thresholds are not identical. Check the right office for the address, not the general county rule.

Wilson County's Building Codes Division is at the Courthouse Annex on East Gay Street in Lebanon, and the county runs an online permitting portal. A phone call during your inspection period costs you nothing and tells you whether a permit was ever issued and whether it was ever closed out with a final inspection.

That second half matters as much as the first. An open permit is its own headache: work that was properly permitted but never passed final inspection. It shows up in the record, title companies notice it, and it is the seller's mess to close out before you take ownership.

Your four options, ranked by how they usually go

When unpermitted work turns up during your inspection period, you have four moves. I walk clients through them in this order.

1. Get it documented, then decide. Before you negotiate anything, find out what you are dealing with. Was a permit issued? Was it closed? Is the work actually up to code, or just unpermitted? A retroactive permit on solid work is an administrative fix. A retroactive permit on work that has to be opened up, rewired, and reframed is a different project entirely. Get a licensed contractor to scope it in writing.

2. Ask the seller to permit it before closing. This is the cleanest outcome and the hardest one to get. The seller applies, the county inspects, corrections get made, and the permit closes. The problem is time. Retroactive permitting timelines vary by jurisdiction and the county is not working on your closing date. If you go this route, build in a real extension rather than hoping it lands.

3. Take a credit and handle it yourself. More realistic in a market like this one. You get a price reduction or closing cost credit sized to the written contractor scope, and you deal with the county after closing. Just be honest with yourself about whether you will actually do it, because the liability transfers with the deed.

4. Walk. Your inspection period exists for exactly this. If the work is structural, if the seller will not engage, or if the numbers stop making sense, terminating inside your contingency period protects your earnest money. I would rather a client lose an inspection fee than inherit a $40,000 correction.

The two costs buyers forget

Insurance. Carriers can decline to cover unpermitted structures, and they can deny a claim tied to unpermitted work later. If a basement finish was never approved and a fire starts in wiring that was never inspected, you do not want to be reading your policy for the first time that week. Ask your insurance agent about the specific structure before you remove your inspection contingency, and get the answer in writing. This is the same discipline I push on every buyer who is verifying conditions before closing, where the rule is to confirm rather than assume.

Resale. You are not the last person to buy this house. Whatever you accept today, you will disclose on your own Property Condition Disclosure when you sell, and the next buyer's appraiser will run the same analysis. Unpermitted square footage you paid full price for is square footage you may not get full price for on the way out.

Where the 2026 market gives you room

Timing is on your side right now, and that changes how hard you can push.

Greater Nashville had 5.59 months of supply in August 2026, up from 4.46 a year earlier, with average active inventory around 14,294 homes. Closings were down 14 percent year over year. Median list to contract across the metro ran 59 days.

Wilson County is still the tightest county in the metro at roughly 27 days to sell, so do not expect a Lebanon or Mt. Juliet seller to roll over. But the broader numbers tell the story: about 20 percent of Wilson County listings took a price drop, the sale to list ratio sat around 98.4 percent, and only 11.2 percent of homes sold above list.

That is a market where asking for a permit correction or a meaningful credit is a normal conversation, not an insult. Two years ago you would have been outbid for asking. Use it.

What I tell every buyer on this

Do not let the word "unpermitted" panic you into either walking away from a good house or waving it through to keep the deal alive. Both reactions cost money.

Find out what was built, whether the county knows about it, whether it is up to code, and what it costs to make it right. Then decide with a number in front of you. Every situation is different, and the only way to know for sure is to run it with someone who knows which office to call for that specific address.

Frequently Asked Questions

Can I still get a mortgage on a house with unpermitted work in Tennessee?

Usually yes, but it depends on the appraiser and the loan type. Conventional lenders follow Fannie Mae guidance, which lets the appraiser assign value to unpermitted space only when comparable sales support it. FHA appraisers can require the work be corrected and reinspected before closing if it raises safety, security, or soundness concerns.

Does unpermitted square footage count in the appraisal?

Not automatically. The appraiser measures the home to the ANSI standard and has to justify any value given to unpermitted finished space with comps showing the local market accepts it. In practice, unpermitted basement finishes and garage conversions frequently get excluded or heavily discounted.

Does a Tennessee seller have to disclose work done without a permit?

Yes, if they know about it. The Residential Property Condition Disclosure specifically asks whether room additions, structural modifications, or other alterations or repairs were made without necessary permits, and separately whether any were not in compliance with building codes. The standard is actual knowledge, so a seller who truly did not know about a prior owner's work is generally not liable.

How much does a retroactive permit cost in Wilson County?

It depends entirely on what has to be opened up and corrected, so there is no reliable flat number. Wilson County publishes separate residential and commercial fee schedules, and the permit fee is usually the small part. The real cost is whatever correction work the inspector requires to bring the structure up to code.

What is an open permit and why does it matter?

An open permit means work was permitted but never passed final inspection, so the county record shows the job unfinished. It can complicate title and it is the seller's responsibility to close out before you take ownership. Ask the codes office whether any permits on the address are still open, not just whether permits exist.

Before you remove your inspection contingency

Unpermitted work is a pricing and liability question, not a moral one. Get the facts from the codes office, get a written scope from a contractor, get your insurance carrier's position, and then negotiate from a real number.

If you are under contract right now and you just got that call from your inspector, reach out. I have walked a lot of Wilson County buyers through this exact situation, and the difference between a deal that closes and a deal that falls apart is usually just knowing which questions to ask and in what order. Whether you are buying in Lebanon, out on acreage, or in one of the Mt. Juliet neighborhoods I cover in detail, the process is the same and I am happy to walk you through it.

About Khristian Schlemmer Khristian is a top-producing Middle Tennessee Realtor and founder of First Class Real Estate, serving buyers, sellers, and investors throughout the Greater Nashville area. With over $75 million in career sales and 300+ homes sold, he is known for creative marketing, strong negotiation, and delivering a true first-class client experience. Born into a family passionate about real estate investing and home building, Khristian combines local market expertise with modern marketing strategies to help clients confidently achieve their real estate goals.