Counties without building codes: what “no code” really means

On July 20, 2026, the Tennessee State Fire Marshal’s Office listed 37 of the state’s 95 counties as “opt out” jurisdictions: places where the county commission has voted, by a two-thirds majority, to keep the state’s residential building code from applying to one- and two-family homes. In Benton, Cocke, Scott, Unicoi and 33 other counties, no building inspection is required for a new house outside the towns that run their own programs.

Every one of those houses still needs a state electrical permit before it can be wired, and a state-approved septic system before it is occupied. That is the pattern this article documents. Counties without building codes are real, and in some states they are common. What they rarely are is counties without permits, inspections or consequences.

Three things “no code” can mean

Listings, forums and the “no code county” lists that circulate online run together three different legal situations. The difference matters, because each one leaves a different set of rules in place.

1. No code has been adopted. The state has no residential code of its own, or has one that applies only where a city or county adopts it. Missouri, Kansas, Arizona, Colorado, Nevada, Wyoming, the Dakotas, Idaho, Iowa, West Virginia and Texas outside cities fall here. If the county never adopted a code, there is no building permit to get.
2. A code exists, but nobody has to enforce it. Kentucky, Maine, Minnesota, New Hampshire and Oklahoma have statewide codes on paper, but small towns and rural areas are not required to run permit and inspection programs. The code still applies to the work. You simply answer for it later, if ever, rather than at inspection time.
3. Homes are exempt from the state code. Vermont’s state codes do not cover owner-occupied single-family homes, Montana exempts homes of fewer than five units outside certified jurisdictions, and Alaska’s fire marshal does not review homes of three units or fewer.

A fourth group, opt-out states, sits between the first two. Tennessee and Mississippi apply a state or state-mandated code by default and let counties vote themselves out of it.

Our 50-state building code table classifies every state’s framework. This article focuses on the states where the answer for a rural parcel can be “no building inspection at all,” and on what replaces it.

Tennessee: the one state with a named list

Tennessee is the only state we found that publishes an official, named, county-by-county list of places that do not enforce a residential code. It is also the clearest illustration of how narrow the “no code” label can be.

Tennessee did not apply a statewide code to one- and two-family homes until 2009 Public Chapter 529, the Tennessee Clean Energy Future Act, took effect on July 1, 2010. According to the University of Tennessee’s County Technical Assistance Service, the same law gave every county and city a way out: a resolution passed by a two-thirds vote exempting one- and two-family dwellings from the statewide standards, “regardless of whether the local jurisdiction is enforcing its own codes or has no codes at all.”

The exemption is deliberately temporary. It expires 180 days after the next election of the local legislative body, so each new county commission must pass it again by two-thirds to keep it. A simple majority can end it at any time. Since May 4, 2017, owners in opt-out areas can ask the State Fire Marshal to inspect their home anyway.

The Fire Marshal’s Residential Jurisdictions & Inspectors page sorts every county and city into three groups. On the list dated July 20, 2026:

• 50 counties are “exempt”: they enforce their own approved code, so you get a permit from the county.
• 8 counties use the State Residential Building Program: Campbell, Chester, Giles, Hardeman, Hawkins, Lauderdale, Meigs and Smith. The state issues the permit and a state-contracted inspector visits.
• 37 counties have opted out: Benton, Bledsoe, Carroll, Claiborne, Cocke, Decatur, Fentress, Franklin, Grainger, Grundy, Hardin, Henderson, Henry, Houston, Humphreys, Jackson, Johnson, Lake, Lawrence, Lewis, McMinn, McNairy, Monroe, Moore (Lynchburg), Morgan, Obion, Overton, Perry, Pickett, Polk, Scott, Sequatchie, Stewart, Unicoi, Van Buren, Wayne and Weakley.

Counting cities and towns as well, the list has 86 opt-out entries, 87 state-program entries and 300 exempt entries. A county’s status covers its unincorporated area only. Benton County has opted out, for example, but the city of Camden inside it is listed as exempt and enforces its own code. The University of Tennessee’s Municipal Technical Advisory Service estimates that opt-out counties and cities hold about 20 percent of the state’s population.

Now look at what opting out does not touch. Tennessee’s electrical rules, Tenn. Comp. R. & Regs. 0780-02-01, say no wiring may be installed without an electrical permit, and require state deputy inspectors to inspect new installations, including well pumps up to the wellhead. A homeowner may pull one property-owner permit every 12 months for their own residence, and that work is still inspected. Alternate power sources need backfeed protection approved by the power supplier, which matters for anyone tying a generator or solar system into a house. Septic systems need a TDEC construction permit before dirt work begins and a certificate of completion afterward. Our Tennessee guide covers that process.

Where rural homes can go uninspected

No other state publishes a list like Tennessee’s, so the picture elsewhere has to be assembled from statutes and the data agencies do publish. Below is what those sources show for the states most often named in “no code” searches.

Missouri: twelve counties with a code

Missouri has no statewide residential code, and it makes adopting a county code unusually hard. Under RSMo 64.170, only first- and second-class counties may adopt building codes, and a county that did not have one before August 28, 2001 needs the approval of voters in the unincorporated area. Smaller counties can regulate buildings only through zoning, which also requires a public vote.

The Missouri Department of Natural Resources links to a county building code dataset on the state’s open data portal. Of 114 counties, it lists a residential code for 12: Boone, Cass, Christian, Clay, Cole, Franklin, Greene, Jackson, Jefferson, Platte, St. Charles and St. Louis. St. Louis City, which is not part of any county, is also listed. The rows were last updated in August 2021, and DNR warns that its lists may not be current. Even so, the order of magnitude is clear: in roughly nine of ten Missouri counties, a house outside town needs no county building permit.

Septic is a different story. RSMo 701.031 requires a sewer connection or a compliant onsite system installed by a state-registered installer, with an exclusion for single-family lots of three acres or more (and some lots of 10 acres or more) where every part of the system stays more than 10 feet from the property line and nothing leaves the property.

Texas: a county code you can opt into, with no permit

Texas counties have no general residential building code for unincorporated areas. Local Government Code chapter 233, subchapter F, added in 2009, is the closest thing. It applies only in a county that adopts an order to use it. New single-family houses and duplexes must then meet the 2008 International Residential Code or the edition used in the county seat.

Even then there is no county permit. The law says it may not be read to require “prior approval by the county,” and it bars any fee to pay for enforcement. Instead, the builder hires an inspector (an engineer, architect, licensed inspector or ICC-certified residential inspector) for at least three inspections: foundation, framing and mechanical, and completion. The county may require notice before work starts and a copy of the final report. An owner-builder who will live in the house is exempt from the notice penalty. Manufactured and modular homes are excluded. In 2025, HB 3680 updated the subchapter’s platting cross-references, effective September 1, 2025.

State law still reaches rural Texas homes in two places. Occupations Code 1305.201(e) requires electrical work in unincorporated areas to meet standards at least as stringent as the state electrical code, although an owner who lives in the house may do the work. And Health and Safety Code 366.051 requires an on-site sewage permit from TCEQ or its local authorized agent. The main exception is in 30 TAC 285.3: one single-family home on a tract of 10 acres or more needs no septic permit if every part of the system is at least 100 feet from the property lines, the effluent stays on the property and it causes no nuisance or pollution.

Kentucky: a mandatory code nobody has to inspect

Kentucky shows why “no code” and “no inspection” are different claims. KRS 198B.060 keeps the Uniform State Building Code mandatory, but says “permits, inspections, and certificates of occupancy shall not be mandatory for single-family residences unless a local government passes an ordinance.” The current text, in effect since July 14, 2022, adds that the state “shall not preempt or assert jurisdiction” to enforce the code on single-family homes. Yet KRS 318.134 still requires a state plumbing installation permit, with a septic permit attached where one is proposed, and KRS 227.480 requires an electrical permit before electrical work begins.

Mississippi and Alabama: opting out, and opting in

Mississippi’s SB 2378 of 2014 told every county and city to adopt one of the last three editions of the IBC or IRC, but let any of them choose not to be covered by resolution within 120 days. The Mississippi Insurance Department summarizes the deadline as November 30, 2014. The department collects those forms but does not publish a list we could find. The law also excludes manufactured homes, farm structures and unattached hunting or fishing camps in unincorporated areas, the last by sworn affidavit.

Alabama went the other way recently. Act 2024-443 repealed the 2010 Energy and Residential Codes Board and gave the Home Builders Licensure Board authority over a state residential code, enforced only by local governments that run permit programs. Counties may adopt or drop a code for unincorporated areas by resolution. From January 1, 2027, licensed home builders must build to the applicable code. Owners building their own home to live in, and not offering it for sale, are exempt from the licensing law.

Montana and Vermont: homes outside the state code

MCA 50-60-102 exempts residential buildings of fewer than five units from Montana’s state building code. Building permits for homes exist only in the 41 jurisdictions the state has certified: 36 cities and towns and five counties, two of which (Pondera and Toole) are certified for commercial work only. Everywhere else, the Department of Labor & Industry still requires a state electrical permit for all electrical work, including a homeowner’s permit with state inspection.

Vermont’s 20 V.S.A. 2730 excludes owner-occupied single-family homes from the “public buildings” the Division of Fire Safety regulates, and the division’s permit sheet lists no state construction or electrical permit for them. But Vermont requires every new home to meet the Residential Building Energy Standards, with a signed certificate posted in the house and recorded in the town land records, and a state wastewater and potable water supply permit before construction.

The West and the Plains: local option, state wiring

Across the interior West and the northern Plains, building codes are a county choice, but state electrical programs fill the gap. ARS 11-861 lets an Arizona county adopt a code and exempt areas zoned rural or unclassified. Colorado counties may adopt codes under CRS 30-28-201, and where they do not, new construction gets state electrical and state plumbing inspections. Wyoming requires a state electrical wiring permit before a utility energizes new construction, except in locally delegated areas and on farms or ranches of 40 acres or more of deeded land. North Dakota’s state electrical board inspects all electrical installations, and South Dakota requires a wiring permit before a power supplier connects a new service. Idaho’s Division of Occupational and Professional Licenses issues state electrical permits, including to homeowners working on their own residence.

For off-grid buyers, the twist is that several of these state wiring rules key on the utility connection. A house that never connects to the grid may never trigger the utility’s demand for proof of a permit, but the permit requirement itself does not disappear. Our off-grid solar guide covers what inspectors look for in a battery-based system.

State-by-state table

The table covers 26 states where at least some new single-family homes can be built without a local or state building inspection. Each row links to the primary source we read. “Still required statewide” lists the permits that do not depend on a local building code; it is not a complete list of rules for any parcel. We could not verify Arkansas, Delaware or Ohio from primary sources for this edition and left them out.

Sources checked October 2026. “Official list” means a government-published list of jurisdictions that do or do not enforce a residential code.

Why the map looks like this

The statutes behind this table share one feature: counties get building-code power only when the legislature grants it, and the grant is usually optional. Arizona’s county boards “may” adopt a code, Colorado’s are “authorized” to, North Dakota’s counties enforce one only if they elect to, and Missouri’s requirement that voters in the unincorporated area approve a county code, and Texas’s refusal to let counties charge a fee or require approval even under its opt-in system, are deliberate limits on county government, not oversights.

When states did extend codes to homes, they often bought rural support with an exit. Tennessee’s 2009 law brought one- and two-family homes under state standards but let counties vote out, and the 180-day expiry forces each newly elected commission to decide again. Mississippi’s 2014 law gave counties four months to decline. Both designs make the code the default and opting out a recorded public act, which is why those states can produce lists at all.

The direction of travel is toward more coverage, not less. Alabama will require licensed builders to follow a state residential code from 2027. Illinois has set IRC-based structural minimums since January 1, 2025. Colorado’s HB22-1362 requires any county that updates its building code to adopt a modern energy code with it, though it does not force code-less counties to adopt one. Nationally, FEMA’s Building Code Adoption Tracking reports that only 34 percent of natural hazard-prone jurisdictions have adopted current hazard-resistant codes.

Electrical and septic rules followed a different path. Faulty wiring causes fires and failing septic systems can contaminate neighbors’ wells, and states generally regulate those risks directly, through state electrical boards and health departments, rather than waiting for counties to adopt building codes. That is why the trades survive in places where the building code never arrived.

What still applies in a no-code county

Assume a parcel truly has no residential building code. The following rules can still apply, and most of them come from the state or federal government, so a county’s decision does not switch them off.

Septic and wastewater

Onsite sewage is regulated by a state health or environmental agency, or by counties under state law, in every state we reviewed, usually with a permit before construction. The exceptions are narrow and conditional: Texas’s 10-acre rule, Missouri’s three- and 10-acre exclusions, and Kansas, where septic permits come through county sanitary codes that counties may adopt. A composting toilet rarely removes the need for a greywater system. See our septic and composting toilet guide and the greywater article.

Electrical and plumbing

State electrical permits or inspections apply where local ones do not in Tennessee, Colorado, Iowa, Minnesota, Montana, Nebraska, North Dakota, South Dakota, Wyoming and Kentucky, among others. Kentucky also requires state plumbing permits, Colorado inspects plumbing where no local program exists, and Maine requires every town to appoint a plumbing inspector. Many states let owner-occupants do their own work, but owner permits are still permits.

Floodplains

A county that participates in the National Flood Insurance Program must, under 44 CFR 60.3, “require permits for all proposed construction or other development in the community, including the placement of manufactured homes,” so it can determine whether the site is in a flood-prone area. That duty does not depend on whether the county has adopted a building code, so a county with no building department may still have a floodplain administrator and a floodplain permit. Ask for it by name.

Manufactured homes

A HUD-code manufactured home is built to federal standards in the factory, wherever it is placed, and its installation is regulated too. Under 24 CFR 3286.5, HUD administers the installation program in any state that does not run its own qualifying program, so a licensed installer and an installation certification are required even in a county with no codes. Tiny houses and RVs are a separate question, covered in our tiny house and RV living articles.

Energy codes, zoning and private covenants

Some states apply an energy code even where there is no building code: Vermont’s RBES, Iowa’s energy standards for all construction and Nebraska’s 2018 IECC, which the state enforces where no local energy code exists. Zoning, subdivision and road-access rules are separate from building codes, and a county with no building code may still zone. Deed restrictions and subdivision covenants apply regardless of any government rule, and in rural subdivisions they often set minimum home sizes or ban living in RVs.

Lenders, insurers and the next buyer

The longest-lasting consequence of building without inspections shows up when someone needs a mortgage. Federal loan programs assume someone inspected the house. Where the county did not, the lender has to arrange it.

FHA’s rule is 24 CFR 200.145(c). Where the local government enforces a code, the lender files the building permit and certificate of occupancy. “In jurisdictions that do not provide building code enforcement and requisite documentation, three inspections are required for new construction,” carried out by an ICC-certified Residential Combination Inspector or Combination Inspector who certifies the work is complete “in compliance with any applicable building code.” Only if no such inspector is available may a licensed and bonded architect, engineer or contractor do it. HUD adopted this version in a final rule effective August 2, 2018.

The inspections happen at stages of construction, and framing cannot be inspected once the walls are closed. An owner-builder in a no-inspection county who hopes to use an FHA loan, or to sell to a buyer who will, needs to arrange those inspections before the drywall goes up.

Conventional loans work through the appraisal. Under Fannie Mae’s Selling Guide B4-1.3-04, the appraiser reports whether the property is a legal conforming use, a legal non-conforming use, an illegal use or has “no local zoning.” Under B4-1.3-05, an addition “that does not have the required permit” must be described along with its effect on value. Where no permit was required, nothing is flagged, but the appraiser still rates quality and condition, and an unconventional house with no comparable sales nearby can appraise well below its cost.

Insurers price code enforcement too. ISO’s Building Code Effectiveness Grading Schedule rates communities from 1 (exemplary enforcement) to 10, and says communities with well-enforced, up-to-date codes “should demonstrate better loss experience, which can be reflected in lower insurance rates.”

Finally, the code does not always vanish from the legal picture just because no one inspected. In New Hampshire, RSA 155-A:2 says all buildings “shall comply with the state building code” and puts responsibility on the contractor where the town has no enforcement. Kentucky’s code remains mandatory even though inspections are not. If a later buyer, insurer or injured guest argues the house was not built to the code that applied, an absent inspector is not a defense.

How to confirm a parcel before you buy

A listing’s “no codes” line is a claim about one local government at one point in time. Check it the way you would check a survey.

1. Find the jurisdiction. Confirm whether the parcel is inside a city, a city’s extraterritorial area, or unincorporated county land. In Tennessee, a county can be opt-out while a town within it enforces a code.
2. Ask the right office in writing. Email the county planning or building office (or the county clerk if there is none) and ask: “For a new single-family home on parcel [number], is a building permit required? Which residential code applies, and which agency inspects electrical, plumbing and septic work?” Ask for the answer on letterhead or by email from a named official. Our records request template can be adapted.
3. Check the state list where one exists. Tennessee’s Fire Marshal list and Montana’s certified-jurisdiction list are the two we found. In Missouri, check the state dataset, then confirm with the county, because it dates from 2021.
4. Call the state trade agencies. Ask the state electrical board or fire marshal whether a state wiring permit applies, and how inspection works if the house will not connect to a utility.
5. Get a septic site evaluation before closing. A soil test that fails is the most common reason a cheap rural lot cannot carry a house, code or no code.
6. Check the flood map and covenants. Look up the parcel on FEMA’s flood map and read the recorded deed restrictions. Ask the title company for copies.
7. Talk to a lender early. If you will ever need a mortgage or refinance, ask how the lender handles new construction in a county without inspections before you pour the foundation.

Our land-buying guide and 55-item buyer checklist cover the rest of the due diligence, and the build guide sets out the order of permits once you own the land.