Selling a House With Unpermitted Work in NH (2026)

Quick answer: Yes, you can sell a house with unpermitted work in New Hampshire, but it rarely stays quiet. Buyers' inspectors, appraisers and town records tend to surface it. Your four real options are to get an after-the-fact permit, sell as-is with honest disclosure, remove or restore the work, or price and structure the sale around it.

Selling a house with unpermitted work in NH is more common than most owners admit. A finished basement, a deck, a garage conversion, a bathroom the previous owner added: if the town never signed off, the work is "unpermitted," and it becomes your problem the moment you list. The good news is that it is usually fixable, and almost always cheaper to deal with on your timeline than on a buyer's. This guide covers what the law says, how it shows up in a sale, and the four ways sellers handle it. It is general information, not legal advice, so involve your attorney early.

What Counts as Unpermitted Work in New Hampshire?

In New Hampshire, building permits are issued and enforced locally, by the town or city building department, under the state building code. Unpermitted work is any construction that needed a permit and did not get one, or that got one but was never closed out with a final inspection. The usual suspects are:

• Finished basements, attics and bonus rooms added to living space
• Decks, porches and three-season rooms
• Garage conversions and in-law or accessory apartments
• Kitchen or bath remodels that moved plumbing, gas or electrical lines
• New electrical panels, wood stoves, and hot tubs wired by the owner

Cosmetic work like paint, flooring and most like-for-like fixture swaps generally does not need a permit, but rules vary by town, so a quick call to your building department answers the question for your house.

Can You Legally Sell a House With Unpermitted Work in NH?

Nothing in New Hampshire law stops you from selling. The risk is not that the sale is illegal, it is what the work can cost you before and after closing. Violations of the state building code carry the same fines as zoning and planning violations: under RSA 155-A:8 they are enforced through RSA 676:15 and 676:17, and RSA 676:17 sets civil penalties of $275 for a first offense and $550 for subsequent offenses, for each day the violation continues, plus the town's costs and attorney's fees if it prevails. In practice most towns want the work legalized, not punished, and a seller who walks in voluntarily is in a far better spot than one who gets a notice. Still, ask your attorney how a particular situation is likely to be handled in your town.

The bigger issue for a sale is honesty. A seller who knows about unpermitted work should not hide it or answer direct questions in a misleading way, because that is how a closed sale turns into a dispute. Our guide to seller disclosure requirements in New Hampshire explains what the paperwork asks and why accuracy matters.

How Does Unpermitted Work Come Up During a Sale?

Sellers hope nobody notices. Usually somebody does, at one of four points:

1. The listing itself. Square footage that does not match town records is a flag for any careful buyer.
2. The home inspection. Inspectors spot non-standard wiring, missing railings, undersized deck footings and unfinished-looking "finished" rooms.
3. The appraisal. Appraisers commonly note unpermitted or unfinished space and may leave it out of the living area or value it less, which can create a gap if the buyer is financing.
4. The town file. A buyer's attorney or lender can check permit history, and some buyers pull it before they ever write an offer.

Whichever way it surfaces, it tends to arrive in the middle of the inspection window, when the seller has the least leverage. That is why finding it first and choosing a plan beats being found.

What Are Your Options When Selling a House With Unpermitted Work in NH?

Option 1: Get an after-the-fact permit

Most towns will accept an application to legalize existing work. Expect plans or photos, inspections that may require opening a wall or ceiling to see wiring or framing, fees that some towns set higher for work done without a permit, and possibly corrections the inspector requires before sign-off. It takes the most time and money, but it produces a clean file that appraisers and lenders can rely on, and it usually protects the most value. Start by calling the building department and asking what they need, before hiring anyone.

Option 2: Sell as-is and disclose it

Many sellers list the house as-is, disclose the work in writing, and let the buyer decide. "As-is" changes who handles repairs, not what you must tell buyers, and it will narrow the buyer pool to people who can finance or pay cash with the issue on the table. We cover that route in detail in selling a house as-is in New Hampshire.

Option 3: Remove or restore the work

For a small deck or a poorly done conversion, tearing it out or returning the space to its original use can cost less than legalizing it. This works best when the work added little value in the first place. Check with the building department before demolition so you do not create a second problem.

Option 4: Price and structure the sale around it

Some sellers offer a credit, reduce the price, or negotiate that the buyer takes over the permit process. Investors and cash buyers are more comfortable with this, but expect a discount, because they are pricing in cost, time and risk. Our breakdown of what it costs to sell a house in New Hampshire shows where a credit fits beside commission and closing items.

Should You Fix Unpermitted Work Before Listing?

If the work is substantial, safety-related, or adds to the living area you plan to advertise, legalizing it before listing is usually the strongest move. A permitted, signed-off finished basement can be marketed and valued as living space, while an unpermitted one often cannot. If the work is minor or the fix would cost more than it returns, option 2 or 4 may make more sense. A pre-listing inspection shows you what a buyer will find, and our list of what to fix before selling your NH home helps you decide what is worth doing.

The market sets how much room you have. Statewide, NHAR reports an August 2026 single-family median of $569,900 and inventory up 18.7% from a year earlier, and local conditions differ a lot: Manchester has about 0.8 months of supply, while Bedford has about 2.3 (NHAR, August 2026). In a tight market like Manchester, buyers often tolerate more issues to win a house. In a market with more choice, like Bedford, a clean permit history gives your listing an edge over the next house on the list. An agent who knows your town can tell you which situation you are in.

Where to Start

1. List every project done since you bought, and who did it.
2. Call the building department and ask what permits are on file for the address.
3. Gather receipts, contractor names and photos, which help an after-the-fact permit.
4. Have your attorney review disclosure language before you list.
5. Ask your agent for a pricing opinion under each option: legalized, as-is, and restored.

If you are comparing agents for a house with a history like this, see how to choose a listing agent in New Hampshire.

Related Reading

• Seller disclosure requirements in New Hampshire
• Selling a house as-is in New Hampshire
• Is a pre-listing inspection worth it in NH?

Frequently Asked Questions

Do I have to disclose unpermitted work when selling in NH?

Do not hide it or answer direct questions in a misleading way. New Hampshire's statutory seller notices focus on items like radon and water, but a known problem you conceal can create liability after closing. Ask your attorney how to word the disclosure for your situation.

Can I get a permit after the work is already done?

Often yes. Most towns accept after-the-fact applications, usually with inspections that may require opening walls, and sometimes with extra fees or required corrections. Call the local building department first to learn what they require.

Will unpermitted work affect my appraisal?

It can. Appraisers commonly note unpermitted or unfinished space and may exclude it from living area or value it lower, which can leave a financed buyer short on appraisal and force a renegotiation.

Can I sell to a cash buyer instead?

You can, and cash buyers are more comfortable with unpermitted work, but expect a discount that reflects their cost, time and risk. Compare it against the net from legalizing and listing.

What are the penalties for unpermitted work in NH?

Under RSA 676:17, civil penalties are $275 for a first offense and $550 for later offenses, per day the violation continues, plus the town's costs and legal fees if it prevails. Many towns prefer to have the work legalized.

How much value does unpermitted space add?

Often less than the same permitted space. Unpermitted rooms may not count toward living area on the appraisal or the listing, so the value depends on whether you legalize it.

Thinking About Selling a House With Unpermitted Work?

Get a plan before you list. The Phinney Team can review what you have, check what is on file, and give you a pricing opinion under each option, so you can see what you would net before you decide. Request your free home valuation and pricing consult, or see our Bedford real estate page if you are in Bedford. Learn more about The Phinney Team at Keller Williams.