Arizona Mold, Pests, Heat & AC Rules
Arizona rules on mold, pests, heat & ac for renters and landlords, with the statute or official page behind each answer. Last verified: 2026-10-22.
Short answer: No statute — general habitability/repair duty applies. Arizona has no mold disclosure or remediation law for rentals. A.R.S. § 33-1324(A)(1)-(2)
The rules in Arizona
| Mold | No statute — general habitability/repair duty applies. Arizona has no mold disclosure or remediation law for rentals. The landlord must comply with building codes materially affecting health and safety and make all repairs needed to keep the premises fit and habitable. The tenant must promptly notify the landlord in writing of conditions that need repair (A.R.S. § 33-1341(8)). Re-verified 2026-10-27. Source: A.R.S. § 33-1324(A)(1)-(2) |
|---|---|
| Pests & bed bugs | Arizona has a bed-bug statute. Landlords must give bed-bug educational materials to existing and new tenants and may not rent a unit they know has a current bed-bug infestation. Tenants may not knowingly move infested items into the unit and must notify the landlord in writing or electronically if they know bed bugs are present. Other pests fall under the general duty to keep the premises fit and habitable. The bed-bug section does not apply to single-family residences, and it does not by itself create a lawsuit for bed-bug damages against either side (§ 33-1319(D)-(E)). It does not say who pays for treatment. Re-verified 2026-10-27. |
| Heat | Yes. The landlord must supply reasonable heat when required by seasonal weather, unless the building is not required by law to have heating or the heat comes from equipment in the tenant's exclusive control with a direct utility connection. If the landlord deliberately or negligently fails to supply heat, the tenant may give notice and buy heat and deduct the cost, recover damages, or get substitute housing. State law sets no minimum temperature. Single-family landlords and tenants may agree in writing, for adequate consideration, that the tenant supplies heat (§ 33-1324(C)). Re-verified 2026-10-27. Source: A.R.S. §§ 33-1324(A)(6), 33-1364 |
| Air conditioning | Yes, where air conditioning or cooling units are installed and offered. The landlord must supply reasonable air conditioning or cooling when required by seasonal weather and keep those systems in good working order. Failure to supply it is treated like a failure to supply heat or water, with the same tenant remedies. State law sets no maximum indoor temperature and does not require a landlord to install AC. Re-verified 2026-10-27. |
| Smoke and CO detectors | An approved smoke detector must be installed in each new residential unit, and in an existing unit when a sleeping area is remodeled under a local permit. The tenant must maintain the detector and keep it working unless the tenant notifies the landlord in writing that it is malfunctioning; the landlord must then repair it. The landlord must give the tenant written notice of these responsibilities. The statute does not address carbon monoxide detectors. Source: A.R.S. § 36-1637 |
Related questions
- Does a landlord have to fix mold?
- Who pays for pest control and bed bugs in a rental?
- Does a landlord have to provide heat?
- Does a landlord have to provide air conditioning?
Arizona vs. neighboring states
| State | Mold | Pests & bed bugs | Heat |
|---|---|---|---|
| Arizona | No statute — general habitability/repair duty applies. Arizona has no mold disclosure or remediation law for rentals. The landlord must comply with building codes materially affecting health and safety and make all repairs needed to keep the premises fit and habitable. A.R.S. § 33-1324(A)(1)-(2) | Arizona has a bed-bug statute. Landlords must give bed-bug educational materials to existing and new tenants and may not rent a unit they know has a current bed-bug infestation. Tenants may not knowingly move infested items into the unit and must notify the landlord in writing or electronically if they know bed bugs are present. Other pests fall under the general duty to keep the premises fit and habitable. A.R.S. § 33-1319; § 33-1324(A)(2) | Yes. The landlord must supply reasonable heat when required by seasonal weather, unless the building is not required by law to have heating or the heat comes from equipment in the tenant's exclusive control with a direct utility connection. If the landlord deliberately or negligently fails to supply heat, the tenant may give notice and buy heat and deduct the cost, recover damages, or get substitute housing. State law sets no minimum temperature. A.R.S. §§ 33-1324(A)(6), 33-1364 |
| California | Visible mold growth, as determined by a health officer or code enforcement officer, and dampness of habitable rooms are listed as substandard housing conditions, which make a unit untenantable under the landlord's repair duty. Minor mold on surfaces that can collect moisture during normal use is excluded. The Toxic Mold Protection Act also requires landlords to give written mold disclosures and a state mold booklet to tenants, but those duties do not start until the Department of Public Health adopts mold exposure standards, guidelines and the booklet. Cal. Health & Safety Code § 17920.3(a)(11), (a)(13); Cal. Civ. Code § 1941.1(a); Health & Safety Code §§ 26147, 26148 | The landlord must keep the building, grounds and all areas it controls clean and free of rodents and vermin, and insect, vermin or rodent infestation is a substandard condition. Under the bed-bug law, the landlord may not show or rent a vacant unit it knows has a current bed-bug infestation, must give every new tenant a written bed-bug information notice (all existing tenants since January 1, 2018), and must notify tenants in writing within two business days of a pest control operator's findings for inspected units (and all tenants for confirmed common-area infestations). Tenants must cooperate with inspections. Cal. Civ. Code §§ 1941.1(a)(6), 1954.602, 1954.603, 1954.604, 1954.605; Health & Safety Code § 17920.3(a)(12) | Yes. A unit is untenantable if it substantially lacks heating facilities that met code when installed and are kept in good working order, and lack of adequate heating is a substandard condition. State housing regulations (Title 25) require dwelling units to be able to maintain a minimum indoor temperature. Cal. Civ. Code § 1941.1(a)(4); Health & Safety Code § 17920.3(a)(6); Cal. Code Regs., tit. 25, § 34 |
| Nevada | No statute — general habitability duty applies. The landlord must maintain the unit in a habitable condition at all times; a unit is not habitable if it violates housing or health codes on health, safety, sanitation, or fitness, or substantially lacks effective waterproofing and weather protection, working plumbing, or walls, floors, and ceilings in good repair. NRS 118A.290(1) | At the start of the tenancy, the building, grounds, and other areas under the landlord's control must be clean, sanitary, and reasonably free of rodents, insects, and vermin. The tenant must keep the unit clean and safe and dispose of garbage properly. No bed-bug-specific statute. NRS 118A.290(1)(g); NRS 118A.310 | Yes. A unit is not habitable if it substantially lacks adequate heating facilities that conformed to law when installed and are maintained in good working order. No statewide minimum temperature or heating season is set. If the landlord is required to supply heat and willfully or negligently fails to, the tenant has additional remedies, including damages of up to $2,500. NRS 118A.290(1)(d); NRS 118A.380 |
| Utah | No statute — the Utah Fit Premises Act does not mention mold. Mold is governed by the general duty to keep the unit fit for human habitation and in accordance with local ordinances and local board of health rules, and not to rent premises unless they are safe, sanitary and fit for human occupancy. The act applies only to conditions that materially affect the physical health or safety of the ordinary renter. Utah Code 57-22-3; 57-22-4(1); 57-22-6 | No statute — no pest or bed-bug provision in the Fit Premises Act. Infestations fall under the safe-and-sanitary duty and local health-department rules when they materially affect health or safety. The renter must keep the unit clean and safe, dispose of garbage properly, and comply with local board of health rules. Utah Code 57-22-3; 57-22-4(1); 57-22-5(1) | Yes. Each rental unit must have heating (along with electrical systems, plumbing and hot and cold water), and the owner must maintain the heating system. State law sets no minimum indoor temperature or heating season; local ordinances and board of health rules may. Utah Code 57-22-3(1); 57-22-4(1) |
| New Mexico | No statute — general repair duty applies. The owner must substantially comply with applicable minimum housing codes and make repairs and do whatever is necessary to put and keep the premises in a safe condition. NMSA 1978, § 47-8-20(A)(1)-(2) | No pest- or bed-bug-specific statute. The owner must keep the premises in a safe condition and common areas safe, and provide garbage receptacles and removal; the resident must keep the occupied part of the premises clean and safe and dispose of garbage properly. NMSA 1978, §§ 47-8-20(A)(2)-(3), (5); 47-8-22(B)-(C) | Yes. The owner must supply reasonable heat (and running water and a reasonable amount of hot water at all times) and maintain heating facilities in good and safe working order. No statewide minimum temperature or heating season is set. Exceptions: buildings not required by law to be equipped for heat, or units where heat is generated by an installation in the resident's exclusive control supplied by a direct public utility connection. NMSA 1978, § 47-8-20(A)(4), (A)(6) |
| Colorado | Yes. A rental is legally uninhabitable if there is mold associated with dampness, or any other damp condition, that would materially interfere with the tenant's health or safety if not fixed. Minor mold on surfaces that collect moisture through normal use is excluded. The landlord must make sure the unit is habitable before leasing it and must fix such conditions under the warranty of habitability; the tenant may use the remedies in § 38-12-507. C.R.S. §§ 38-12-503, 38-12-505(1)(a), (3) | The landlord must provide appropriate extermination for rodent, vermin, pest or insect infestations throughout the premises. Under the bed-bug law, the tenant must promptly notify the landlord in writing or electronically; within 96 hours the landlord must get the unit inspected by a qualified inspector, and inspect contiguous units if bed bugs are found. The landlord must give written results within two business days and start treatment within five business days. The landlord pays for inspection and treatment, and may not rent a unit it knows or suspects has bed bugs; on request it must disclose bed bugs in the past eight months and the last clean inspection date. C.R.S. § 38-12-505(1)(b)(VII)-(VIII); §§ 38-12-1001 to 38-12-1007 | Yes. A unit that substantially lacks functioning heating facilities that met code when installed and are kept in good working order is uninhabitable. Lack of functioning heating from October through April is presumed to materially interfere with the tenant's life, health or safety. State law sets no minimum indoor temperature. C.R.S. § 38-12-505(1)(b)(V), (4)(d) |
City rules that may add to state law
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Arizona Mold, Pests, Heat & AC Rules FAQ
Does a landlord have to fix mold in Arizona?
No statute — general habitability/repair duty applies. Arizona has no mold disclosure or remediation law for rentals. The landlord must comply with building codes materially affecting health and safety and make all repairs needed to keep the premises fit and habitable. (A.R.S. § 33-1324(A)(1)-(2))
Who pays for pest control and bed bugs in Arizona?
Arizona has a bed-bug statute. Landlords must give bed-bug educational materials to existing and new tenants and may not rent a unit they know has a current bed-bug infestation. Tenants may not knowingly move infested items into the unit and must notify the landlord in writing or electronically if they know bed bugs are present. Other pests fall under the general duty to keep the premises fit and habitable. (A.R.S. § 33-1319; § 33-1324(A)(2))
Does a landlord have to provide heat in Arizona?
Yes. The landlord must supply reasonable heat when required by seasonal weather, unless the building is not required by law to have heating or the heat comes from equipment in the tenant's exclusive control with a direct utility connection. If the landlord deliberately or negligently fails to supply heat, the tenant may give notice and buy heat and deduct the cost, recover damages, or get substitute housing. State law sets no minimum temperature. (A.R.S. §§ 33-1324(A)(6), 33-1364)
Does a landlord have to provide air conditioning in Arizona?
Yes, where air conditioning or cooling units are installed and offered. The landlord must supply reasonable air conditioning or cooling when required by seasonal weather and keep those systems in good working order. Failure to supply it is treated like a failure to supply heat or water, with the same tenant remedies. State law sets no maximum indoor temperature and does not require a landlord to install AC. (A.R.S. §§ 33-1324(A)(4), (6), 33-1364(A))
Who is responsible for smoke detectors in a rental in Arizona?
An approved smoke detector must be installed in each new residential unit, and in an existing unit when a sleeping area is remodeled under a local permit. The tenant must maintain the detector and keep it working unless the tenant notifies the landlord in writing that it is malfunctioning; the landlord must then repair it. The landlord must give the tenant written notice of these responsibilities. The statute does not address carbon monoxide detectors. (A.R.S. § 36-1637)
General legal information, not legal advice. Laws change and local rules can differ; check the linked official source or talk to a lawyer about your situation.