Does Nevada Require CO Detectors? Local Codes and Scope

Last verified: August 26, 2026

Nevada carbon monoxide detector laws are primarily jurisdiction-driven because no single statewide NRS provision was confirmed here that mandates alarms for every residential occupancy category. Practical requirements are commonly enforced through local adoption of IRC Section R315 language, including city and county trigger conditions tied to fuel-fired appliances, attached garages, new construction, and some permit-related work in existing dwellings.

Boulder City publishes a clear IRC-based alarm handout, and Clark County lists adoption of the 2024 IRC effective January 11, 2026, which reinforces local-code variability inside one state. Because Nevada implementation is local first, owners should confirm the governing code edition and inspection workflow with the local authority having jurisdiction before occupancy turnover or renovation closeout.

Strong Nevada files include local citations, installation records, and reinspection evidence.

A persistent citation to NRS Chapter 468 circulates in consumer-facing CO detector summaries, but the chapter does not exist in the Nevada Revised Statutes: the leg.state.nv.us table of titles runs from Chapter 467 directly to Chapter 472. Nevada is the only state on this site whose circulating citation points at a chapter number the legislature has never used; Arizona's two both point at real sections about something else. so any obligation framed as a duty under "NRS Chapter 468" is unsupportable on its face. The State Fire Marshal does hold general fire-prevention authority under NRS 477.030, but Nevada does not adopt the IRC statewide and there is no NRS section that mandates residential CO alarms in every dwelling. The binding compliance source for a Nevada property is whichever building or fire code the city or county authority having jurisdiction has actually adopted, such as Clark County's 2024 IRC (effective January 11, 2026) or the Boulder City IRC R315 handout. Those two examples are on different editions and therefore on different section numbers, which is a trap worth naming. Carbon monoxide alarms sit at Section R315 in the 2018 and 2021 editions of the International Residential Code and at Section R311 in the 2024 edition, where R315 was reassigned to sleeping lofts. Anywhere in Nevada running the 2024 edition, including Clark County, the alarm rule is R311 and a reference to R315 will land the reader on a section about lofts without any sign that it is the wrong one. Read every section number below as the 2018 and 2021 numbering, and translate it if the jurisdiction has moved on.

In 60 Seconds

CO detector requirements for Nevada
Applies to homes?	No
Applies to rentals?	No
Applies to hotels/STRs?	Yes
Applies to schools?	Yes, under a condition
Applies to workplaces?	Yes, under a condition

Schools and workplaces

Schools: it depends, and the test is one you can apply to the building itself. A school Nevada is building, and nothing in one already standing, and the edition changed what puts the new one inside. Nevada's State Fire Marshal regulations now adopt the 2024 International Fire Code with amendments, in force from 1 January 2026 in place of the 2018 edition that ran from 27 February 2020. The 2024 text has no occupancy list to argue about. Section 915.1.1 requires detection wherever any of four conditions exists, a building containing a CO source, a building containing or supplied by a CO-producing forced-air furnace, a building with an attached private garage, or a building in which a CO-producing vehicle is used, and Section 915.1 excepts only Group S, F and U occupancies that are not normally occupied. So a Nevada classroom is no longer reached by being a classroom; the building is reached by what is in it, and an all-electric school with no attached garage meets none of the four. Nothing reaches the school already standing, and that has not changed. The Fire Marshal's amendments delete Chapter 11 of the code whole, which up.codes renders as a struck-through chapter heading carrying a deletion marker, and Section 1103.9 lives inside Chapter 11. A Nevada building that predates the code owes nothing from this route however much fuel it burns. One limit is specific to schools rather than to buildings and is statutory, so the edition does not touch it. NRS 477.030(1) provides that the State Fire Marshal's authority to enforce or investigate does not extend to a school district except as otherwise provided in NRS 393.110. The regulation still applies; the office that enforces it is not the Fire Marshal's.

Workplaces: it depends, and the test is one you can apply to the building itself. Nevada deletes the retrofit chapter and keeps the new-construction one, so everything here turns on what a building holds on the day it is built. The State Fire Marshal's regulations adopt the 2024 International Fire Code with amendments from 1 January 2026, and Section 915.1.1 of that edition requires carbon monoxide detection wherever a building contains a CO source, contains or is supplied by a CO-producing forced-air furnace, has an attached private garage, or has a CO-producing vehicle used within it. Section 915.1 excepts only Group S, Group F and Group U occupancies that are not normally occupied. There is no Group B, F, M or S list left to fall outside of, which is what the earlier Nevada answer turned on. So a Nevada workplace is in or out on what it burns and what it parks. An office with a gas-fired furnace is inside the second condition. A repair shop running vehicles indoors is inside the fourth by name. A warehouse nobody normally occupies is inside the Group S exception and stays out. The building already standing is still outside all of it, because the Fire Marshal's amendments delete Chapter 11 whole and take Section 1103.9 with it. No NRS provision places a carbon monoxide duty on a Nevada workplace, so the fire code is the whole of the answer.

When Are CO Alarms Required?

Buildings with fuel-burning appliances
Buildings with attached garages
New construction
When building permits are required
Trigger conditions are based on local IRC adoption, not a single statewide Nevada IRC adoption.

Where to Install CO Alarms

Local IRC Section R315 text places alarms outside each separate sleeping area in the immediate vicinity of bedrooms.
Where a fuel-burning appliance is inside a bedroom or attached bathroom, local IRC Section R315 language requires an alarm in the bedroom.

For detailed placement guidance beyond legal requirements, see where to place carbon monoxide detectors.

Device Requirements

UL 2034 listed carbon monoxide alarms under local IRC-based pathways.
Combination smoke and carbon monoxide units typically require UL 2034 plus UL 217 listing where adopted.
Hardwired power with battery backup is common in new work, with limited battery-only exceptions under local code text.

Landlord and Tenant Responsibilities

Landlord: Nevada writes no carbon monoxide duty for a landlord in its habitability section. NRS 118A.290 makes a dwelling uninhabitable where it violates housing or health codes concerning health, safety, sanitation or fitness for habitation, or where it substantially lacks any of nine enumerated features, among them heating facilities and electrical systems maintained in good working order. Carbon monoxide is on neither list, so the route is the code-violation limb rather than a named device. Provision: NRS 118A.290.

The cited Nevada sources do not establish one statewide landlord-tenant duty matrix for every property class.
State the new-build requirement and the absent retrofit requirement together wherever Nevada's lodging duty appears. Most American hotels are existing buildings, so an operator who reads only that Nevada requires detection will assume a duty their own property does not carry, and a guest who reads only that Nevada deleted Chapter 11 will miss that a hotel built since the amendment does carry one.

Enforcement

Enforced by: Local authority having jurisdiction that enforces adopted building and fire code in each Nevada city or county.

Enforcement typically occurs:

During permitting and inspection for new construction and covered alteration work.
During local enforcement response when required alarms are missing, non-operational, or improperly located.

What a Tenant Can Do in Nevada

When a carbon monoxide alarm stops working in a rented home in Nevada, these are the five routes a tenant can take and where each one comes from.

"Via general law" means the Nevada carbon monoxide statute itself is silent and the remedy comes from the state's landlord-tenant law instead. The remedy is available even though the alarm rule does not contain it.

Tenant remedies for a defective carbon monoxide alarm in Nevada, with the citation or the body of law searched for each.
Rent withholding	Via general lawNRS 118A.355(1)(d). A genuine right to stop paying rather than a counterclaim: rent that becomes due may be withheld, without late fees or any other charge authorized by the chapter or the agreement, until the landlord has remedied or attempted in good faith to remedy. Two conditions matter more than the grant. 118A.355(5) requires the withheld rent to go into an escrow account maintained or approved by the justice court under a local rule, and says plainly that a tenant has no defence to eviction unless it was deposited there, so a tenant who keeps the money loses the protection the section exists to give. And 118A.355(4)(b) is the shortcut: where an agency authorized to inspect for building, housing or health code violations has served written notice on the landlord and the landlord has not remedied within the time that notice prescribes, the tenant may withhold without giving 14 days' notice at all. An inspector's letter about a missing alarm is worth more to a Nevada tenant than their own. One structural note for anyone applying the URLTA positional rule here: Nevada has a counterclaim, at 118A.490, but not where the landmark predicts. 118A.390 occupies the slot immediately after essential services and fire and casualty follows it at 118A.400, so the landmark is intact and the counterclaim is not in it; it is filed among the landlord's remedies as a defence to an action for nonpayment.
Repair and deduct	Via general lawNRS 118A.360. A small remedy with the limit applied twice. It is available only where the reasonable cost of compliance or repair is less than the greater of $100 or one month's periodic rent, and 118A.360(4) then caps the landlord's total liability under the section at that same figure within any 12-month period, so the ceiling is both per job and per year. An alarm sits comfortably inside it. The mechanics are written notice of the tenant's intention to correct at the landlord's expense, 14 days for the landlord to use best efforts or more promptly if conditions require in case of emergency, work done in a workmanlike manner, an itemized statement, then deduction of the actual and reasonable cost. The drafting point that catches people is 118A.360(2): the landlord may name in the rental agreement the person, firm or class of firms who must do the work, and the tenant has to use them unless they are unavailable or unable to perform.
Right to end the lease	Via general lawNRS 118A.355(1)(a). Immediate termination once the 14 days have run, with all prepaid rent and any recoverable security deposit returned. Nevada runs two parallel sections and the choice between them has consequences: 118A.350 is for a breach of the rental agreement and 118A.355 for a failure to maintain the unit in a habitable condition, and only the habitability section carries the withholding right. Faster than either is 118A.380, which gives the landlord 48 hours excluding Saturdays, Sundays and legal holidays where a willful or negligent failure to supply an essential item or service makes the premises unfit for habitation. That section names heat, air conditioning, running water, hot water, electricity, gas and a functioning door lock, then adds another essential item or service, so the catch-all is open and an alarm is not named in it. Electing that route is exclusive: 118A.380(2) bars the tenant from also proceeding under 118A.350 and 118A.360 on the same breach.
Notice the tenant must give	Via general lawNRS 118A.355(1); NRS 118A.360(1). Written notice on every route, no waiting period before serving any of them, and different contents for each. The habitability notice must specify each failure and request that the landlord remedy them. The repair notice must state the tenant's intention to correct the condition at the landlord's expense. The essential-services notice must specify the breach, and 118A.380(4) attaches a condition the other two do not carry: the tenant must be current in the payment of rent at the time of giving it. The most useful thing in this cell is what can stand in for the tenant's notice. Under 118A.355(4) and 118A.380(3), written notice from a governmental agency authorized to inspect for building, housing or health code violations does the work instead, both for damages and, where the landlord misses the deadline that notice sets, for withholding.
Landlord cure period	Via general law, 14 daysNRS 118A.355(1). Fourteen days, and satisfied by less than a repair: the landlord defeats the remedy by adequately remedying the failure or by using best efforts to remedy it within the time. Nevada then uses the same fourteen consistently, at 118A.350 for a breach of the agreement and at 118A.360 for the repair-and-deduct route, which is rarer across this matrix than it should be. The exceptions cut in both directions. 118A.380 shortens the period to 48 hours excluding Saturdays, Sundays and legal holidays for essential items and services. 118A.360 adds "or more promptly if conditions require in case of emergency" without saying how much more promptly. And where the clock was started by a code inspector rather than by the tenant, the period is whatever that agency's own notice prescribed, not fourteen days.

Applies to every row above:Nevada's Residential Landlord and Tenant Act is a 1977 URLTA adoption that has been amended in almost every session since, and it is one of twelve records in the fifty-one where all five remedy columns are filled. Two features decide how a carbon monoxide alarm gets into it. 118A.290(1) opens with a codes hook before it opens its list: a dwelling unit is not habitable if it violates provisions of housing or health codes concerning the health, safety, sanitation or fitness for habitation, or if it substantially lacks any of nine listed things. Nevada has no statewide alarm mandate, so that hook is the route in, and what it hooks is whatever the city or county has adopted, such as Clark County's 2024 IRC. Paragraph (i) is a second way in, reaching other facilities and appliances maintained in good repair if supplied or required to be supplied by the landlord. Two words the chapter never uses are carbon monoxide and smoke, zero occurrences each across 120,000 characters, against 337 for landlord and 473 for tenant, which is the control on every negative below. The chapter was read in full from a 2026-08-01 Wayback capture of the Legislature's own chapter page, because leg.state.nv.us returns 403 to automated requests.

Remedies last checked 2026-08-03. Compare Nevada with the other states.

What Nevada Requires in Lodging

The Nevada carbon monoxide requirement reaches hotels and short-term rentals.

Hotels already standing: not covered. Nevada imposes this on what gets built and nothing on a hotel that was standing when the rule took effect, so an operator of an older property carries no retrofit duty from it.

Operator duty: Nevada requires detection in a hotel it is building and nothing in a hotel already standing, and an operator needs both halves of that to plan anything. The State Fire Marshal's regulations adopt the International Fire Code, and NAC 477.283(1)(v) amends Section 915.1.1 by deleting "occupancies and" and replacing it with "occupancies, including, without limitation, Residential Group R-3 occupancies used for transient occupancy of less than 30 days, and". That reaches a hotel through Group R-1 and reaches a short-term rental in an ordinary house through Group R-3, which Nevada wrote in by hand. Detection then belongs in the sleeping units on the model conditions: a fuel-burning appliance or fireplace in the unit, a fuel-burning forced-air furnace serving it, such an appliance elsewhere in the building with a communicating opening, or an attached private garage. The next subsection, NAC 477.283(1)(w), reads in full: "Chapter 11 is deleted." Chapter 11 is the existing-buildings chapter and Section 1103.9 is the carbon monoxide provision inside it, so a Nevada hotel that was standing when the code took effect carries no retrofit duty from this route. Under NRS 477.030(1) the regulations apply throughout the state, while the Fire Marshal's own enforcement arm stops short of school districts and of counties of 100,000 or more, where the local fire authority enforces instead, so an operator in Clark or Washoe deals with the county and not with Carson City.

Full Nevada hotel and short-term rental requirements

Penalties for Non-Compliance

No single statewide Nevada carbon monoxide detector fine schedule was confirmed in the cited sources.

Enforcement and penalty pathways are generally local and tied to adopted municipal or county code.

Additional Notes

No standalone statewide CO alarm statute identified as of 2026. NRS 477.030 provides general fire marshal authority but does not mandate CO alarms directly.
Nevada compliance should be mapped city by city or county by county because code editions and adoption dates can differ.
Teams should capture local code edition, permit context, and final inspection outcome for each property.

Local Rules That Differ From State Law

At least one Nevada municipality sets CO requirements that go beyond the statewide rule. Where your property sits decides which applies, and the stricter one governs.

Henderson

Henderson fills, for houses and flats at least, the exact hole the state leaves. Nevada's fire code deletes Chapter 11 of the International Fire Code outright, so the state requires detection when something is built and asks nothing of a building already standing. Henderson Section 15.12.050(H) sits in the Property Maintenance Code rather than in a construction chapter, and it makes every dwelling unit carry smoke alarms and carbon monoxide alarms to the standard of the residential, building or existing building code, as a condition of how the property is kept rather than of how it was built. It then says in terms that retrofit alarms and combination units are acceptable, which is the language of a rule aimed at older stock. Two limits keep this honest for a traveller. The subsection reaches "dwelling units", and the very next subsection of the same section distinguishes "dwelling units, guest rooms, and congregate residences" when it sets heating standards, so the drafters knew the difference and a hotel guest room is outside this one. And it borrows its trigger from the model codes rather than writing its own, so what counts as a covered unit still comes from there. Henderson also adopts the 2024 International Existing Building Code at Chapter 15.11, with its own amendment, which is a second instrument the state fire code route does not supply.

Henderson Municipal Code Section 15.12.050(H), Chapter 15.12 Property Maintenance Code, with Chapter 15.11 adopting the 2024 International Existing Building Code Checked 2026-08-07.

What was checked:Las Vegas, Reno and Henderson read in full, which between them cover most of Nevada's population and nearly all of its lodging. Henderson is below. Reno's code mentions carbon monoxide exactly once and it has nothing to do with where anyone sleeps: mobile vendors running an ancillary power source must carry a detector in the unit for generator use, which is a food truck rule. Its index was plainly answering, with 449 responses for "building" and 562 for "alarm" in the same pass. Las Vegas needs a sharper caveat than a bare zero would suggest, and it is the reason this entry does not claim the city is clean. Its Title 16 establishes a building code by adopting three things at once: the 2024 International Building Code, the 2024 International Residential Code, and separate documents entitled "Southern Nevada Amendments to the International Building Code, 2024 Edition" and its residential twin, which amend the model codes by adding and deleting sections and which the municipal code does not reproduce. So the zero here is a fact about the Las Vegas ordinance and says nothing about the regional amendment documents, which were not obtained. Anyone continuing this should read those two documents before treating southern Nevada as settled. Nevada's smaller resort jurisdictions, including the Lake Tahoe communities and unincorporated Clark County, were not searched.

Local sweep last reviewed 2026-08-07.

Official Sources & References

Nevada State Fire Marshal, Adopted Regulation LCB File No. R205-24, amending NAC 477.281 , Section 9, amending NAC 477.281(1)(a) through (e) (fire code, accessed 2026-08-26)
An edition-currency check run on 2026-08-26, recorded in full because the two obvious places to look disagree and the wrong one is the more official-looking. Section 9 of the adopted regulation amends NAC 477.281 in Nevada's usual amendatory notation, brackets marking deleted text: "(a) International Fire Code, [2018] 2024 edition, including appendices B, C, D, F and H", and the same substitution for the International Building Code, the International Existing Building Code, the International Wildland-Urban Interface Code and the Uniform Mechanical Code. The State Fire Marshal's own site carries the banner "Effective January 1, 2026 the NSFM will be enforcing the 2024 Codes", and its adoption hearing minutes for this file are dated 9 December 2025. THE CODIFICATION LAGS THE REGULATION, and anyone checking this citation will hit that. The Legislature's published NAC 477.281 at leg.state.nv.us still reads "International Fire Code, 2018 edition", with a history line ending at R048-24, effective 16 September 2024. Read that page alone and Nevada looks like a 2018 state. The adopted regulation is the instrument; the codified text is a publication of it, and it has not caught up. A third source is worse than either: a commercial mirror of NAC 477.281 still serves the 2006 editions, which Nevada left three cycles ago.
Nevada Revised Statutes Section 477.030 (State Fire Marshal Powers and Duties) , NRS 477.030 granting State Fire Marshal fire prevention authority (state code, accessed 2026-02-18)
No standalone statewide CO alarm statute identified as of 2026. NRS 477.030 grants the State Fire Marshal authority over fire prevention code adoption and enforcement. Nevada does not adopt the IRC statewide; CO alarm requirements enter through local jurisdiction adoption of IRC Section R315. This statute provides the general state-level fire safety framework.
City of Boulder City Nevada smoke and carbon monoxide alarms handout , IRC Section R315 excerpts for listing, trigger, location, power, and alternatives (local ordinance, accessed 2026-02-17)
Official local publication with clear IRC-based residential alarm requirements.
Clark County Building and Fire Prevention codes page , 2024 IRC adoption listing effective January 11, 2026 (local ordinance, accessed 2026-02-17)
County-level confirmation that IRC adoption can differ by jurisdiction in Nevada.
Nevada State Fire Marshal fire prevention and engineering code adoption page , State adoption list for IFC IBC IEBC and UMC (agency guidance, accessed 2026-02-17)
Supports that Nevada does not adopt the IRC as one statewide baseline.
City of Las Vegas building inspection overview , Smoke and carbon monoxide detector inspection checklist references (agency guidance, accessed 2026-02-17)
Municipal inspection guidance illustrating local enforcement practice.
NAC 477.283, State Fire Marshal additions and deletions to the adopted code , 477.283(1)(v) amending IFC 915.1.1; 477.283(1)(w) deleting Chapter 11 (fire code, accessed 2026-08-05)
The instrument behind both Nevada values, and it decides them in opposite directions. Subsection (1)(v) amends IFC 915.1.1 by replacing "occupancies and" with "occupancies, including, without limitation, Residential Group R-3 occupancies used for transient occupancy of less than 30 days, and", which reaches a hotel through Group R-1 and a short-term rental in a house through Group R-3. Subsection (1)(w) reads in full "Chapter 11 is deleted", removing the existing-buildings chapter and Section 1103.9 with it. Read at 50,294 bytes, control "477.283" at 4 and the deletion clause present verbatim; leg.state.nv.us returns HTTP 403 to automated requests.

Disclaimer: This page explains the law as it stood on August 26, 2026. It is general information, not legal advice, and reading it creates no attorney-client relationship. Requirements vary by city, county and building type, and statutes and codes are amended: confirm the current text with the issuing authority before acting on it. Each requirement here cites the instrument it comes from, so you can check it at source.

Frequently Asked Questions

Does Nevada have one statewide residential CO alarm mandate?

The sources cited here do not confirm one universal Nevada statute that requires carbon monoxide alarms in every home and rental statewide. Instead, practical duties are commonly created through local adoption of IRC Section R315 language. That means scope and trigger details can vary between jurisdictions such as Boulder City and Clark County. Nevada owners should verify the local code edition and enforcement process before deciding whether a specific property is covered or exempt. Local written confirmation is the safest thing to rely on.

Which trigger conditions are most common in Nevada local codes?

In Nevada local IRC-based frameworks, the most common triggers include fuel-burning appliances, attached garages, qualifying new construction, and some permit-related work in existing dwellings. Boulder City publications and Clark County code adoption materials show how those triggers are operationalized by local authorities. Because Nevada is not one statewide IRC adoption state, owners should not assume that one city handout governs another county. Property files should include the exact local source and effective date used for decisions.

Where should alarms be installed under Nevada IRC Section R315 pathways?

Local Nevada IRC Section R315 language generally requires alarms outside each separate sleeping area in the immediate vicinity of bedrooms. Where a fuel-burning appliance is in a bedroom or attached bathroom, an alarm is usually required in that bedroom as well. Placement should be verified against the jurisdiction's adopted code edition and manufacturer instructions. Nevada teams should keep plan markups, installed-device photos, and final inspection notes to support compliance if enforcement questions arise.

How should Nevada landlords handle rentals when duties are local?

Landlords should treat Nevada rental compliance as a local-code workflow and confirm applicable rules with the city or county authority having jurisdiction before turnover. A strong process includes trigger analysis, documented installation locations, testing records, and prompt correction of deficiencies. Even without one statewide rental matrix, local enforcement can be firm when required alarms are missing. Nevada lease and maintenance files should preserve local citations so responsibility and remediation steps are clear.

For Nevada all-electric homes, which local adoption steps must be checked before exemption?

Not automatically. In Nevada, exemption decisions depend on the adopted local code text and property context, not only on utility type. Jurisdictions using IRC Section R315 style triggers may still require analysis where attached-garage pathways or adjacent combustion risks exist. Owners should obtain written local confirmation before recording an exemption decision. Maintaining that evidence is important for transfer, insurance, and post-incident review. Nevada policy files should include the exact local section used to support exemption logic.

How does Nevada compare with Arizona on CO alarm strategy?

Nevada runs on local adoption, while Arizona operators may work under a different blend of state and local legal pathways depending on occupancy and municipality. Southwest portfolios should keep separate compliance matrices and avoid one shared template. For neighboring-state comparison before finalizing procedures, review Arizona CO detector laws and compare trigger language, placement controls, and enforcement points. Nevada teams should keep local adoption dates and Arizona statute references separated in audit materials.

Practical CO Detector Guides

Beyond legal requirements, these guides help you choose, install, and maintain CO alarms:

Where to place carbon monoxide detectors, room-by-room placement recommendations
CO detector beeping patterns, what different alarms mean
What to do if your detector goes off, emergency response checklist
CO resources and links, official agencies and safety information