What Alabama Requires for CO Detectors in Homes and Facilities

Last verified: August 24, 2026

Alabama's landlord-tenant act reserves the repair-and-deduct section and never uses the word deduct. Section 35-9A-403, the slot the model act fills with repair-and-deduct and the one Arizona filled at 33-1363, reads "Reserved", and "deduct" appears nowhere in Chapter 9A against 178 occurrences of "landlord". A tenant here cannot fix a carbon monoxide alarm and take it off the rent, and that is a legislative choice rather than an oversight.

What Alabama does require runs through facility rules and code adoption rather than one CO statute. Alabama carbon monoxide detector requirements apply to DMH-certified residential facilities under Ala. Admin. Code r. 580-3-22-.10 where fuel-burning appliances, fireplaces or attached garages are present.

For many one- and two-family homes and rentals, the practical legal trigger is local enforcement of adopted residential code language such as IRC R315 through the Alabama Energy and Residential Code framework. Hotels and similar occupancies within the Alabama State Building Code scope are covered through statewide IBC adoption and state or local enforcement channels. Owners and operators should confirm city or county code edition, document installation near sleeping areas, and retain maintenance records for inspections.

Because duties differ by occupancy type, a property-level compliance review is more reliable than assuming one universal Alabama statute for every home and rental unit.

In 60 Seconds

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

Schools and workplaces

Schools: it depends, and the test is one you can apply to the building itself. A schoolhouse is one of only four things the Alabama State Building Code reaches, and the limb is narrower than the word. Ala. Admin. Code 355-12-1-.04(1) limits the whole code to state buildings, schoolhouses, moving picture theaters and hotels of fifteen or more bedrooms, and it defines the second of those as any building erected or acquired by the public schools of Alabama together with any private building in which twenty-five or more persons are congregated regularly for instruction in any branch of knowledge. A public school is therefore inside the building code by name where an office is not, and a private school that gathers fewer than twenty-five is outside it and answers the fire code alone. Within that scope 355-12-1-.01 adopts the 2021 International Building Code, whose Section 915.1.1 reaches classrooms in Group E occupancies where a condition in Sections 915.1.2 through 915.1.6 exists: a fuel-burning appliance or fireplace in the classroom, a fuel-burning forced-air furnace serving it, fuel-burning equipment elsewhere in the building with a communicating opening, or an attached private garage. Section 915.2.3 then asks for more than a detector in the classroom, and the exception inside it is measured differently from the one that decided whether the school was in scope at all. Signals from classroom detectors "shall be automatically transmitted to an on-site location that is staffed by school personnel", excepting a Group E occupancy with an occupant load of 30 or less. Occupant load is a figure calculated from the building code's own table rather than a headcount, so it is not the twenty-five persons congregated regularly for instruction that 355-12-1-.04(1) uses to bring a private school inside the code. A small Alabama private school can therefore be inside the building code on the headcount and outside the transmission duty on the occupant load, and the two have to be worked out separately rather than read off each other. A school already standing is reached by the other adoption, the State Fire Marshal's own at Ala. Admin. Code 482-2-101-.02, which takes the 2021 International Fire Code with Chapter 11 and Section 1103.9 unamended and carries no size threshold at all.

Workplaces: Alabama places no carbon monoxide detection duty on an office, shop or other workplace. Federal and state occupational rules set an exposure limit for carbon monoxide in air; they do not require a detector to be installed, and this row is about installation. Ala. Admin. Code 355-12-1-.04 limits the State Building Code to state buildings, schoolhouses, moving picture theaters and hotels of fifteen or more bedrooms, and an office, shop or factory is none of the four. The Fire Marshal's separate adoption at 482-2-101-.02 reaches further but carries Section 915.1.1 unamended, whose occupancy list is Group I-1, I-2, I-4, R and Group E classrooms and contains no Group B, F, M or S. Both routes read; neither reaches a workplace.

When Are CO Alarms Required?

Buildings with fuel-burning appliances
Buildings with attached garages
New construction
When building permits are required
DMH-certified residential facilities: CO detectors required per Ala. Admin. Code r. 580-3-22-.10 when fuel-burning appliance, fireplace, or attached garage present.
Statewide residential construction: 2015 IRC R315 adopted via AERC (305-2-4-.09), applies to new construction and permitted work. Enforcement is local; some jurisdictions (e.g., Montgomery with 2003 IRC) may not enforce R315.

Where to Install CO Alarms

Covered DMH/MR residential facilities: “Facilities containing a fuel-burning appliance or fireplace or having an attached garage shall be equipped with carbon monoxide detectors.” (Ala. Admin. Code r. 580-3-22-.10, (n)2)
Placement details (e.g., “outside sleeping areas”, “every level”) are not specified in the cited DMH rule text.

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

Device Requirements

Not specified in the cited DMH rules.

Landlord and Tenant Responsibilities

Landlord: Alabama writes no carbon monoxide duty for a landlord, and the duty a tenant can point at is the general one. Ala. Code 35-9A-204 requires a landlord to comply with applicable building and housing codes materially affecting health and safety, to keep the premises habitable, and to maintain in good and safe working order all electrical, heating and ventilating facilities and appliances supplied or required to be supplied by the landlord. The section never mentions carbon monoxide or any alarm, so an alarm reaches it as a health and safety condition rather than as a named device. Provision: Ala. Code 35-9A-204.

Operator of the DMH/MR-certified residential facility (the rule imposes duties on the “facility”).
Alabama's fire code was read on 2026-08-10 and it replaced the existing-building answer rather than supplementing it. The record used to say permitted work decided whether a standing hotel was reached, on the strength of the 2021 International Existing Building Code adopted beside the building code. That test is not the one that decides. Regulation 482-2-101-.02 adopts the 2021 International Fire Code as the State Fire Marshal's own regulation, Chapter 11 survives the not-adopted list intact apart from Section 1103.5.4, and Section 1103.9 requires carbon monoxide detection in an existing Group R-1 building on the same triggers as new work.
What did not travel with it is the consequence. Part 2 of Chapter 1 is among the portions Alabama did not adopt, and that part is Sections 103 through 114, the fire code's own permits, board of appeals, violations, penalties and stop-work provisions. So the fire code supplies the requirement and the marshal's own statute supplies the reach: Ala. Code 36-19-4 lets the marshal, his deputies and his assistants enter any building or premises in the state to inspect, and Ala. Code 36-19-3 makes every municipal fire chief, police chief and town mayor and every county sheriff an assistant by virtue of office. There is no part of Alabama with nobody holding that office, which is why the subpage no longer describes the marshal as a fallback for places without a local authority.

Enforcement

Enforced by: Alabama Department of Mental Health, Office of Life Safety and Technical Services.

Enforcement typically occurs:

Residential facilities may be inspected on a semi-annual basis under routine circumstances.

DMH’s Life Safety/Technical Services deficiencies framework allows time-limited corrective action; failure to correct within prescribed times may result in decertification of the violating program/facility.

What a Tenant Can Do in Alabama

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

"Via general law" means the Alabama 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 Alabama, with the citation or the body of law searched for each.
Rent withholding	NoAla. Code 35-9A-164. The section is titled payment of rent as a prerequisite to enforcing remedies, and it reads in full that the tenant may not withhold payment of rent to the landlord, while in possession, to enforce any of the tenant's rights under this chapter. There is no severity exception and no notice that unlocks it. A tenant who wants to stay and still press the point pays the rent and counterclaims under 35-9A-405.
Repair and deduct	NoAla. Code 35-9A-164. Two independent reasons, and both are on the page. Nothing grants the remedy: 35-9A-403 is reserved and the act never uses the word deduct. And 35-9A-164 forecloses the mechanism a deduction would need, because taking repair costs off the rent is withholding payment of rent to enforce a right under the chapter. The section does not say "repair and deduct", so this cell rests on the breadth of its wording rather than on a provision aimed at the remedy.
Right to end the lease	Via general lawAla. Code 35-9A-401. This is the remedy Alabama did keep, and with self-help gone it carries most of the weight. The tenant's written notice specifies the acts and omissions and states that the agreement terminates on a date not less than 14 days after receipt if the breach is not remedied. A landlord who adequately remedies before that date stops the termination, and a tenant cannot terminate for a condition caused by the tenant, the tenant's family, or a licensee.
Notice the tenant must give	Via general lawAla. Code 35-9A-401. No waiting period runs against the tenant before serving, but the notice has to do two jobs at once: name the acts and omissions constituting the breach, and state the termination date. A letter that asks for a repair without naming a termination date starts nothing under this section.
Landlord cure period	Via general law, 14 daysAla. Code 35-9A-401. Fourteen days from receipt of the notice. It is the only statutory clock in the Alabama row, because the two denied columns have no clocks and the notice column sets none, so a tenant who misses this one has no second mechanism waiting behind it.

Applies to every row above:Alabama's act names itself the Uniform Residential Landlord and Tenant Act and keeps the model numbering, with 35-9A-204 as the landlord's duty and 35-9A-401 as the noncompliance section. The interesting part is what Alabama did not adopt. Section 35-9A-403, the slot the model act uses for repair-and-deduct and the slot Arizona filled at 33-1363, reads "Reserved". The word "deduct" appears nowhere in Chapter 9A, against 178 occurrences of "landlord", so that absence is the legislature's choice rather than a gap in the reading. Alabama then closed the other self-help route as well, which is why two of the five columns below are denied and no cell in this row lets a tenant act without either leaving or suing. Five of the fifty-one deny a money remedy outright and Alabama is the only one that denies both: North Carolina, Texas and Wyoming refuse rent withholding alone, South Carolina refuses repair-and-deduct alone.

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

What Alabama Requires in Lodging

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

Hotels already standing: covered too. The Alabama requirement reaches an existing hotel and not only one being built.

Operator duty: Two instruments reach an Alabama hotel and they answer different halves of the question. The State Building Code, Ala. Admin. Code 355-12-1-.01, adopts the 2021 International Building Code and its Section 915, and Rule 355-12-1-.04 lets that code reach lodging only where the property is a public inn or lodging house of fifteen or more bedrooms taking transient guests for pay, so a twelve-room inn sits outside it and the duty attaches to design, construction and permitted work reviewed by the Division of Construction Management. The building already standing is answered by the other instrument. The State Fire Marshal adopts the 2021 International Fire Code at Ala. Admin. Code 482-2-101-.02, and the not-adopted list reaches Part 2 of Chapter 1, several appendices and Section 1103.5.4 and nothing else in Chapter 11, so Section 1103.9 stands as written and Table 1103.1 marks it required for Group R-1. An operator with a fuel-burning appliance, a fuel-fired forced-air furnace or an attached private garage therefore carries a detection duty on the standing building, with no permit and no bedroom count in front of it.

Full Alabama hotel and short-term rental requirements

Penalties for Non-Compliance

Specific fines/criminal penalties for CO-detector noncompliance are not stated in the cited DMH rules; enforcement is primarily through certification/inspection mechanisms, including possible decertification for uncorrected deficiencies.

Additional Notes

Two separate regulatory pathways for CO detectors: (1) DMH-certified facilities via Ala. Admin. Code 580-3-22-.10; (2) residential and commercial code pathways via AERC and State Building Code adoption.
AERC adopted 2015 IRC with R315 intact (not listed among amendments at 305-2-4-.09), but practical enforcement is local and project-specific rather than one blanket statewide mandate for all existing homes and rentals.
DCM code (355-12-1) covers only state/public buildings, hotels, movie theaters, NOT residential. Do not confuse with AERC.

Local Rules That Differ From State Law

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

Tuscaloosa

Tuscaloosa attaches the requirement to a licence rather than to a building, and that changes who it catches. Section 7-204 makes every premises applying for a short-term rental business licence carry smoke detectors and carbon monoxide detectors, and the trigger the rest of Alabama uses is absent here: no fuel-burning appliance and no attached garage need be present, so an all-electric house with no garage is covered here and covered nowhere else in the state. The reach follows the licence out past the city limit, since the section applies in the city "or its police jurisdiction". Detectors sit in a list beside operable egress windows in sleeping areas, handrails and guardrails, GFIC protection, fire extinguishers, a displayed 9-1-1 address and emergency egress lighting, so a host reads all seven or none. What gives it teeth is Section 7-205: a licence cannot issue or renew without an inspection, done by a licensed home inspector or someone the chief building official approves for a single-family rental and by the fire department or a building inspector for a bed and breakfast or a unit in a multi-family building, with a report less than twenty-four months old on file at renewal and the owner certifying nothing has changed since.

Tuscaloosa Code of Ordinances Sections 7-204 and 7-205, Chapter 7 Article XII (Ord. No. 8560, 7-11-17; Ord. No. 9044, 3-23-21) Checked 2026-08-07.

What was checked:Six cities read in full from the codified text each one publishes: Birmingham, Montgomery, Mobile, Tuscaloosa, Orange Beach and Gulf Shores. Only Tuscaloosa appears below. Alabama is a state where looking at city ordinances is the right move rather than a formality, because Rule 355-12-1-.05 of the State Building Code settles conflicts by saying that between the state code, local codes and the Life Safety Code "the most stringent requirements shall prevail", so a stricter city rule survives instead of being pre-empted. Montgomery, Orange Beach and Gulf Shores carry no carbon monoxide provision at all, and those readings were control-tested rather than taken from an empty search: the same pass over the same text returns 1,172, 409 and 138 responses for "building" and 635, 415 and 168 for "fire". Mobile's one occurrence is not a requirement, it is a severe-weather sales tax holiday that exempts a fire extinguisher, a smoke detector or a carbon monoxide detector from tax, which tells a reader where to buy one and nothing about whether they must. The three coastal codes are worth a note of their own: Orange Beach and Gulf Shores run substantial vacation rental regimes, 76 and 24 mentions between them, and neither one asks for a detector. Birmingham comes with a limit that has to be stated. The only edition anyone publishes online is codified through Ordinance No. 20-107 of 29 June 2020, so its clean result is a fact about the code six years ago and not about the code today; a Birmingham ordinance passed since then would not appear in it and this reading cannot rule one out. Smaller municipalities and the county commissions were not searched.

Local sweep last reviewed 2026-08-07.

Official Sources & References

Alabama Administrative Code, Rule 580-3-22-.10 (Over Sixteen Bed Residential Facility) (PDF via Alabama Legislature Admin Code API) , (n) OPEN FLAME DEVICES, item 2 (CO detectors requirement). (state code, accessed 2026-02-16)
Primary official rule text for DMH/MR residential facilities with over 16 residents; includes the CO-detector requirement tied to fuel-burning appliances, fireplaces, or attached garages.
Alabama Administrative Code, Chapter 580-3-22 (Minimum Standards for Physical Facilities) (PDF via Alabama Legislature Admin Code API) , 580-3-22-.03 (Inspection and right of entry); 580-3-22-.07 (deficiencies; possible decertification). (state code, accessed 2026-02-16)
Official chapter-level PDF providing DMH inspection authority and enforcement mechanisms applicable to certified residential facilities.
Alabama Administrative Code, Alabama State Building Code (Ala. Admin. Code ch. 355-12-1) (PDF via Alabama Legislature Admin Code API) , 355-12-1-.01(1)(a)-(b) (adopts 2021 IBC; applicability to state buildings and certain occupancies). (building code, accessed 2026-02-16)
Official statewide building-code adoption (by reference) for buildings within the State Building Code’s scope; this chapter does not itself restate CO-alarm/CO detection placement/trigger requirements.
City of Auburn, Alabama, Residential Smoke & Carbon Monoxide Alarms (Inspection Services information bulletin) (PDF) , CO alarm triggers and placement bullets (outside sleeping areas; every level; hardwired with battery backup). (agency guidance, accessed 2026-02-16)
Local (City of Auburn) guidance, not statewide. Included as an example of how a local jurisdiction describes/implements building-code CO-alarm provisions.
Alabama Energy and Residential Code (AERC), adopts 2015 IRC including R315 , 305-2-4-.09 (building code, accessed 2026-02-16)
AERC Board adopted 2015 IRC with R315 intact for residential construction. R315 not listed among amendments.
Alabama Division of Construction Management, Building Codes , 355-12-1 (agency guidance, accessed 2026-02-16)
Confirms DCM scope covers state/public buildings, hotels, movie theaters, NOT residential. Residential falls under AERC.
Alabama State Building Code, Rule 355-12-1-.01, Adopted Standard Codes , Ala. Admin. Code 355-12-1-.01, adopting IBC 2021, IEBC 2021, IFC 2021 and NFPA 72 (2019); Ala. Admin. Code 355-12-1-.04, which limits the whole code to state buildings, schoolhouses, moving picture theaters and hotels of fifteen or more bedrooms (building code, accessed 2026-08-10)
Promoted from the hotel subpage's source list because the top-level record rested on it without citing it. The adoption of the 2021 International Existing Building Code alongside the building code is what reaches an Alabama hotel that is already standing, and it does so through the work rather than on a date. The same rule also adopts the 2021 International Fire Code, but the adoption that decides an Alabama hotel already standing is the State Fire Marshal's own, at 482-2-101-.02, which is the next source.
Alabama State Fire Marshal Regulation, Ala. Admin. Code ch. 482-2-101, Fire Codes; Additional Codes , Ala. Admin. Code 482-2-101-.02, whose paragraph (1) adopts the 2021 International Fire Code and Appendices B, C, D, E and M; the portions paragraph (2) does not adopt are Part 2 of Chapter 1, Appendix A, Section D107, Appendices F, G, H, I, J, K and L, and, at (2)(k), Section 1103.5.4 and Appendix M, which the rule has therefore adopted at (1) and excluded at (2)(k). Neither limb touches carbon monoxide, so Chapter 11 and its Section 1103.9 provision are adopted unamended (fire code, accessed 2026-08-10)
The instrument that reaches a standing Alabama hotel, and the one the record was missing. Section 1103.9 requires carbon monoxide detection in existing Group I-1, I-2, I-4 and R occupancies and in classrooms in Group E occupancies where a condition in Sections 915.1.2 through 915.1.6 exists, in the Section 915.2 locations and to the Section 915.4 installation rules, and Table 1103.1 marks the section required for Group R-1. The Group E limb is new in the 2021 edition, which is the edition Alabama adopts, and it is what carries the section to a school already standing. Table 1103.1 leaves the Group E column blank against this row while the section text reaches it; the column mapping was proved with three controls. Read as the official PDF the Legislative Services Agency serves at https://admincode.legislature.state.al.us/api/chapter/482-2-101; the browser view at the URL above answers curl with a 74 character shell. One dating point for a later reader: rule 482-2-101-.01, which adopted the 2013 National Fire Codes, was repealed effective 1 January 2023, so the Life Safety Code named in the building code's own precedence rule at 355-12-1-.05 is no longer the code the marshal enforces.
Code of Alabama, Title 36, Chapter 19, Fire Marshal (Sections 36-19-3 and 36-19-4) , 36-19-3, municipal fire chiefs, police chiefs, town mayors and county sheriffs are assistants to the Fire Marshal by virtue of office and subject to his direction; 36-19-4, the Fire Marshal, his deputies and any of his assistants may enter any building or premises within the state at all hours to investigate or inspect (state code, accessed 2026-08-10)
Why the fire code's requirement has somewhere to land once Part 2 of Chapter 1 is left unadopted. Read from the Alabama Fire College's compilation of the state's fire and emergency services statutes, whose own footer dates it September 2014, because the Legislature's ALISON portal serves a script shell to curl, law.justia.com answers 403 and has no Wayback capture of this chapter, and FindLaw redirects the section to its title landing page. The wording is therefore current as of that compilation rather than as of today, and the sections are used here for the marshal's inspection reach and not for any carbon monoxide requirement.

Disclaimer: This page explains the law as it stood on August 24, 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

For Alabama operators, which occupancy and trigger factors create mandatory alarm duty?

The clearest statewide mandate appears in Ala. Admin. Code r. 580-3-22-.10 for DMH-certified residential facilities. That rule requires detectors when a facility has a fuel-burning appliance, fireplace, or attached garage. For other dwellings, Alabama carbon monoxide alarm requirements are often implemented through locally enforced building-code adoption, including IRC R315 pathways referenced through AERC rule 305-2-4-.09. In practice, owners should verify local code edition before assuming coverage, because enforcement can vary by jurisdiction even within the same state.

Do Alabama single-family homes follow a statewide CO statute or local code adoption?

Alabama does not rely on one broad residential statute for every detached home. Instead, many compliance obligations for houses come from locally adopted building code language, especially where IRC R315 is in force through state and local code administration. That means new construction and permit-based projects are the most common trigger points for home installation requirements. Owners should confirm the active municipal code edition and inspection policy before project start. This approach reduces surprises at final inspection and aligns with Alabama carbon monoxide detector compliance expectations.

Which Alabama occupancies have the strongest statewide CO requirement today?

DMH-certified residential facilities have the most explicit statewide Alabama requirement because Ala. Admin. Code r. 580-3-22-.10 directly states detector obligations. Other occupancies may still face carbon monoxide alarm duties, but those obligations are commonly tied to local code adoption and project-specific enforcement. For portfolio operators, this means occupancy mapping is essential: facility licensing rules, local building code requirements, and inspection authority should be checked together. Treating every property as identical can create compliance gaps, especially when mixed occupancy types are involved across multiple counties.

How should Alabama landlords approach CO alarm duties when rental statutes are limited?

Because Alabama landlord-tenant statutes do not provide one detailed statewide CO duty matrix, landlords should work from applicable local building and fire code triggers plus lease terms. If a rental unit is covered by adopted IRC-style requirements, owners should install and maintain alarms before occupancy, then document repairs and tenant notices. Keeping written logs for inspections, work orders, and battery replacement decisions can reduce legal exposure after incidents. This operational approach supports Alabama carbon monoxide detector requirements even where statewide rental language is limited.

What placement standard is used in Alabama permit-based projects?

Where local jurisdictions enforce IRC R315-style language, placement usually follows sleeping-area and floor-level rules used in modern residential code practice. Common interpretations include detectors outside sleeping areas and on each level of covered dwellings, with additional placement when fuel-burning equipment is near bedrooms. Alabama sources such as local inspection guidance reference these patterns, but city-level enforcement details still control final approval. Builders should confirm placement diagrams with the local code office before rough-in and keep device listing documentation for the inspection file.

How do Alabama requirements compare with Georgia code enforcement?

Alabama uses a mixed model that combines targeted statewide rules, such as Ala. Admin. Code r. 580-3-22-.10, with local enforcement of adopted residential code provisions. Georgia also depends heavily on local enforcement, but it is usually framed around state minimum code adoption and IRC Section R315 workflows. Teams operating in both states should maintain separate jurisdiction checklists instead of copying one compliance template. For a side-by-side regional reference, review Georgia CO detector laws before finalizing installation and inspection procedures.

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