What HVAC contractors get wrong about permits

Every HVAC contractor in the southeast has had this conversation. It's a Friday afternoon in August, the homeowner's compressor is dead, the indoor temp is climbing past 85, and they don't want you “bothering with the city” for what should be a same-day fix. You tell them about the permit. They push back. You explain. They push harder. The job is two hours of work and the permit fee is half the labor.

You pull the equipment off the truck.

The story most contractors tell themselves about this decision is that it's a single, contained risk — maybe a fine if a code inspector ever shows up, but probably nothing. The people who taught you the trade likely told you the same thing. Twenty years ago they were mostly right.

They're not anymore.

The states most active in HVAC enforcement — Tennessee, Georgia, North Carolina, and most of the southeast cluster — have layered new exposure on top of what used to be a single fine-or-no-fine risk. Today, skipping the permit creates four separate exposure vectors that each trigger from the same omission, with different statutes of limitations and different parties who can come after the contractor. Most working HVAC pros have heard of one of them. The other three are how the surprise arrives.

This guide is what each vector actually does, and why the math has changed.

01.Why the math has changed

Twenty years ago, “no permit” was a single risk with a single counterparty. If a code official caught the work, the contractor paid a fine. If no one caught it, nothing happened. The decision was a coin flip with a known downside.

That model is gone. Three things changed.

First, state licensing boards in the southeast became significantly more active. The Tennessee Board for Licensing Contractors took disciplinary action in 299 cases in 2024 alone, assessing close to $1 million in civil penalties across those cases. Georgia's State Construction Industry Licensing Board and the Conditioned Air Contractors Board both run public disciplinary registries that homeowners — and home inspectors, and other contractors — search before hiring. North Carolina's State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors processes more than 700 complaints a year. The boards aren't waiting for code officials to catch unpermitted work anymore. They take complaints directly.

Second, real-estate disclosure law caught up. Tennessee's Residential Property Disclosure Act, codified at TCA § 66-5-201, now explicitly asks sellers to disclose “remodeling work done without permits or compliance to building codes.” Georgia and North Carolina have parallel requirements. When the house sells, the unpermitted HVAC install becomes a line on the seller's disclosure form. If the seller marks it “unknown” or “no” and the buyer's inspector finds it, the original installing contractor is the named party in the resulting lawsuit — even if the install was four years ago and the contractor has long since moved on to other jobs.

Third, the manufacturer warranty language tightened. Carrier, Trane, and Lennox all now require installation by a licensed HVAC service provider in accordance with the manufacturer's specifications and applicable code. Code compliance is proved by the inspection sign-off. When the compressor fails in year four and the homeowner submits the warranty claim, the manufacturer asks for the inspection record. If there isn't one, the warranty claim gets denied — and the contractor who installed the unit is the one the homeowner calls.

The four vectors covered in §§2–5 each trigger from the same omission. They run on different timelines and answer to different parties. They compound.

02.The state licensing board is now the primary risk

The single most expensive thing unpermitted work can do is cost a contractor their license. Not “make it harder to renew” — cost it outright. Every state in the southeast cluster has the statutory authority to suspend or revoke a contractor's license for performing work that required a permit and didn't have one. The process runs without any code official's involvement.

Tennessee

The Board for Licensing Contractors operates under TCA Title 62, Chapter 6. Discipline ranges from civil penalty to license suspension to permanent revocation. The Board's stated escalation factors are severity of harm, prior disciplinary history, and cooperation with the investigation. A first offense with no prior history typically resolves through a consent order — essentially a plea bargain — that the licensee signs in lieu of a formal hearing. The consent order is public record. The second offense within a five-year window is treated as an aggravating factor under Board rules; second offenses are where suspensions start showing up. Civil penalties for unlicensed practice run up to $5,000 per offense.

Georgia

Under O.C.G.A. § 43-41-16, the State Licensing Board may impose probation, reprimand, license suspension up to one year, revocation, restitution to consumers, administrative fines up to $5,000 per violation, or required continuing education. HVAC work is governed by the separate Conditioned Air Contractors Board, which can take parallel action. Both boards' disciplinary records are publicly searchable through the Georgia Secretary of State's GOALS verification portal. The Georgia Attorney General's Consumer Protection Division actively warns homeowners to “watch for contractors who offer dramatically lower bids because they skip permits and inspections” — which means the boards have institutional incentive to take these complaints seriously.

North Carolina

Discipline runs through the North Carolina State Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors under NC GS § 87. The process is unusual in scale: more than 700 complaints a year handled by a small staff. Cases move through a Resolution Review Committee that proposes a voluntary disciplinary agreement; if the licensee declines, the case advances to a formal hearing. The general-contractor side of NC's regulatory structure has no statutory authority to impose civil fines — but it has full authority to suspend or revoke the license, which is the harder consequence.

03.The unpermitted job becomes a line on the seller's disclosure form

Most contractors don't think about real estate when they think about permits. The connection isn't obvious: the install happens, the customer pays, the job closes out. What does any of that have to do with the property changing hands four years later?

Everything, as it turns out.

Tennessee's Residential Property Disclosure Act (TCA § 66-5-201 et seq.) requires sellers of one-to-four-unit residential property to provide written disclosure of known material defects before contract. The state-supplied disclosure form asks directly about “remodeling work done without permits or compliance to building codes.” Georgia and North Carolina have parallel statutes with similar disclosure forms. The seller signs the form under oath. The buyer relies on it.

When the buyer's home inspector finds the unpermitted HVAC install — and home inspectors find them routinely; checking for permit records is standard practice on any system replacement that looks newer than the original construction — one of two things happens. Either the seller acknowledges the unpermitted work was there when they bought the house and the buyer renegotiates or walks. Or the seller acknowledges they had the work done themselves, and now they're personally liable for misrepresentation under the disclosure statute.

Either way, the original installing contractor's name surfaces. Service records, the customer's payment records, manufacturer warranty registration, the equipment serial number — these all point back to the company that did the work. And in most southeast states, construction-defect claims survive between three and ten years from the date of substantial completion, depending on the state and the nature of the defect. The “I'm not the one selling the house” defense doesn't hold. The contractor of record at the time of installation is the party on the hook.

The practical pattern: the homeowner doesn't sue over the original install. They sue over the sale that fell apart because of the original install. The contractor finds out about it through a process server two years after they thought the job was closed. The damages claimed are the lost sale price differential, the cost of retroactive permitting (often 2–4× the original permit fee in jurisdictions that treat after-the-fact permits as code-violation remediation), and legal fees.

04.The warranty claim that comes back denied

Every major HVAC manufacturer — Carrier, Trane, Lennox, Goodman, Rheem, York — now requires installation by a licensed HVAC service provider in accordance with the manufacturer's specifications and applicable code. The Trane limited warranty language is typical:

Code compliance is how that's proved. Not a contractor's assurance, not a clean-looking install — the permit and inspection sign-off are the documentation pathway. When the homeowner submits a warranty claim three or four years out, the manufacturer's warranty desk asks for the installation record. If the installation went through permit and passed inspection, the claim moves forward. If it didn't, the claim gets denied with the boilerplate “installation not in conformance with manufacturer specifications” language.

The homeowner doesn't call the manufacturer. They call the contractor who installed it.

The Georgia Attorney General's Consumer Protection Division is direct about this on its public-facing consumer guidance: “Using an unlicensed HVAC contractor can void your warranty.” The same logic applies to a licensed contractor who skipped the permit — the warranty void isn't about who installed it, it's about whether the installation was documented as code-compliant.

The contractor's practical exposure is the difference between what the warranty would have covered and what the contractor now eats to keep the customer relationship. On a compressor failure in year four of a ten-year warranty, that's a $2,500–$4,500 part the contractor either replaces at cost, eats entirely, or refuses — and refusing is how a five-star Google review becomes a one-star Google review plus a license-board complaint plus the §3 disclosure problem the next time the house sells.

The compounding is what makes the math change.

05.The lien defense most contractors haven't heard of

This is the section most working HVAC contractors haven't seen before. It's also the one that converts a payment dispute from “annoying” to “uncollectable.”

Tennessee Code § 62-6-128 and § 66-11-150 explicitly bar unlicensed contractors from filing a lien against a residence. TCA § 62-6-103 limits any recovery by an unlicensed contractor to documented expenses — not contract price, not labor markup, not profit margin. The Tennessee Board for Licensing Contractors states this directly on its consumer-information page: “Unlicensed contractors may only be paid for documented expenses and not the contract price.”

Georgia goes further. O.C.G.A. § 43-41-17(b) makes any contract for work requiring a residential or general contractor license, where the contractor lacks that license, “unenforceable in law or in equity by the unlicensed contractor.” Not just lien-unenforceable. Contract-unenforceable. The contractor cannot collect through any legal mechanism.

The bridge from “unpermitted work” to “no lien rights” runs through license discipline. A contractor with a current license has full lien rights on day one of a job. If the homeowner files a board complaint over unpermitted work mid-collection, and the board moves to suspend or revoke the license, the lien filed under the prior license status becomes vulnerable. More commonly, the homeowner's attorney doesn't need the board to act — they raise the contract-illegality defense directly. The argument: “The work itself was performed in violation of state and local law; the contract is therefore void as against public policy; the contractor cannot recover.”

Tennessee courts have softened this in some cases under quantum meruit — allowing the contractor to recover documented expenses even when the contract is unenforceable. But quantum meruit means documented expenses only. No labor markup, no profit, no incidentals. On a $7,000 condenser swap that went unpermitted, the contractor might recover the equipment cost and refrigerant. The labor — the actual value of the work — is gone.

The practical end-state: a customer who's looking for a reason not to pay the final invoice has a defense the contractor's attorney can't easily counter. Most disputes get settled before they get this far, but they get settled on terms unfavorable to the contractor. The unpermitted job creates leverage that didn't exist before. That leverage exists for the full statute-of-limitations period — one year in Tennessee, ninety days for the lien itself in Georgia.

06.Customer consent doesn't transfer the risk

The most common path to unpermitted work isn't the contractor cutting corners. It's the homeowner pushing back on the permit fee, the schedule delay, or the inspection visit, and the contractor accommodating.

The state licensing boards don't recognize customer consent as a defense. The Tennessee Board's Consumer Protection language is explicit: a licensee is responsible for ensuring permits are pulled when required, regardless of the customer's preference. Georgia's Conditioned Air Contractors Board operates the same way. A signed waiver from the homeowner (“the customer assumed responsibility for permit compliance”) does not bind the board — it binds the customer and the contractor in a private contract, which the board has no obligation to honor.

Same logic for the manufacturer warranty. Carrier doesn't care that the homeowner waived the permit. The warranty terms say installation must comply with applicable code; the warranty desk asks for the inspection record; the absence of one ends the conversation.

Same logic for the real-estate disclosure. The customer who signed the waiver also signs the disclosure form three years later when they sell. They check “remodeling done without permits — yes.” The buyer's attorney now has both the disclosure admission and the original contractor's name on the service records. The waiver protects nothing, because the disclosure obligation belongs to the seller, not to the original contractor.

The professional response to “do I really need the permit?” is “yes — the install legally requires one, and that's how the warranty stays valid and the work stays defensible if anyone asks later.” Most homeowners accept this immediately once it's framed as protecting them. The ones who don't are the ones contractors most need to walk away from — they're the same customers who renegotiate the price at completion, dispute the final invoice, and file a board complaint when something unrelated breaks two years later. The permit conversation is also the qualification conversation.

07.Exposure tier table: HVAC work types vs. risk vectors

A reference for matching common job types to the four exposure vectors covered above. Use it as the in-line decision tool when a customer pushes back on a permit.

08.The six most common ways contractors get burned

These are the patterns that surface most often in disciplinary records, in inspector complaints, and in the construction-defect cases that ultimately settle. None of them are about contractors being careless. They're about contractors operating under assumptions that used to be true and aren't anymore.

1. “It's just a like-for-like changeout.”

Code adoption changed since the original install. Load-calc requirements changed. The Manual J calculation requirement now applies to most equipment replacements in most southeast AHJs — North Carolina codifies it under 21 NCAC 50.0505 explicitly, and the rest of the cluster has caught up. The swap that was permit-exempt twelve years ago is now a permit-triggering job by statute even though the equipment looks identical.

2. “I'll pull it after the install if anyone asks.”

Most AHJs treat after-the-fact permits as evidence of intent, not remediation. Fines run 2–4× the standard permit fee schedule. The City of Atlanta and Mecklenburg County both publish escalated fee schedules for retroactive permitting. The cost savings from “I'll deal with it later” evaporate at the first re-inspection.

3. “The homeowner is a friend / family member.”

No statute carves out friends-and-family exceptions. The board doesn't care about the relationship. The disclosure form doesn't ask whether the work was done as a favor. The manufacturer warranty doesn't have a friendship clause. The relationship makes recovery harder, not easier — the friend or family member can become the complainant if the relationship sours.

4. “It's a rental property — the landlord said it's fine.”

Landlord consent doesn't substitute for the AHJ's authority. Unpermitted work on rental property is also a code-enforcement violation in addition to the licensing-board violation. Tenant-injury cases stemming from unpermitted equipment installations carry a separate negligence-liability vector that doesn't appear on the four-vector list above because it's not specific to HVAC — but it should be flagged anyway.

5. “I sub-contracted to another shop, so it's their problem.”

Primary contractor of record is liable in most southeast states regardless of who physically performed the work. The license under which the permit would have been pulled is the license at risk. Subbing the install does not transfer the regulatory exposure; it expands it, because now there's a paper trail involving two contractors.

6. “It's a commercial job — the building owner has their own people.”

Commercial permitting is generally moreaggressive than residential, not less. The fine schedules are larger, the inspectors are more frequent, and the building owner's attorneys are more sophisticated when something goes wrong. Commercial owners also routinely write permit-pulled-and-inspected language into the service contract, which converts a regulatory failure into a contract breach with separate damages.

09.The point of this guide isn't to be more careful. It's to have a workflow.

The contractors who don't get burned by any of the four exposure vectors aren't the ones with better intentions. They're the ones who surface the permit requirement at job creation, before any equipment leaves the truck. Who track the inspection through to close-out. Who keep the documentation for the six-year retention window the southeast states generally require.

The permit is the proof-of-work. It's the warranty's documentation pathway. It's the disclosure-form answer. It's the license's defense against a complaint. It's all four at once. Skipping it doesn't save the contractor anything; it just defers the cost to a moment when the cost is larger and harder to control.

For jurisdiction-specific specifics, see our state guides:

• Tennessee HVAC permit guide
• Georgia HVAC permit guide
• North Carolina HVAC permit guide

Each covers the state's licensing-board structure, AHJ contacts for the major metros, code-adoption status, and the jurisdiction-specific quirks that change how each of the four exposure vectors plays out locally.

10.Primary sources

Tennessee

• TCA Title 62, Chapter 6 — Contractors and Contracting — tn.gov
• TCA § 62-6-120 — Penalties — justia
• TCA § 62-6-128, § 66-11-150, § 62-6-103 — Lien restrictions on unlicensed contractors
• TCA § 66-5-201 et seq. — Residential Property Disclosure Act
• TN Board for Licensing Contractors complaint process — tn.gov
• TN Board Consumer Laws — tn.gov
• TN AG/TDCI 2024 disciplinary action press release — tn.gov
• TN Department of Health Healthy Homes — disclosure form scope — tn.gov

Georgia

• O.C.G.A. § 43-41-16 — Grounds for discipline — justia
• O.C.G.A. § 43-41-17(b) — Unenforceability of contracts with unlicensed contractors
• GA SoS Conditioned Air Contractors complaint page — sos.ga.gov
• GA Attorney General Consumer Protection — warranty + unlicensed work — consumered.georgia.gov

North Carolina

• NC GS § 87-11(a), § 87-13, § 87-13.1 — Licensing-board discipline
• 21 NCAC 50.0505 — Load-calc-on-changeout
• NC Board of Examiners of Plumbing, Heating, and Fire Sprinkler Contractors complaints — nclicensing.org
• NC Licensing Board for General Contractors FAQ — nclbgc.org

Manufacturer warranty

• Trane Limited Warranty — Packaged Units — trane.com PDF
• Lennox Quality Care Program Equipment Limited Warranty — lennox.com PDF