Natural gas alarms are due in New York City rentals by January 1, 2027.

Last reviewed against the City’s published sources on September 19, 2026. This page covers the five boroughs of New York City only.

First, what this is not

A natural gas alarm is not a carbon monoxide detector, and neither one does the other’s job. Carbon monoxide is what an appliance gives off when it burns badly. Natural gas is the fuel itself, leaking before anything burns. Different gas, different sensor, and a different spot in the room: natural gas is lighter than air, which is why this alarm goes up near the ceiling and next to the appliance, while your carbon monoxide detector sits near the bedrooms.

It is also not the gas piping inspection. That is Local Law 152 of 2016: a licensed master plumber inspects a building’s gas piping at least once every four years, and one- and two-family homes are left out of it. The Department of Buildings explains that one here. The alarm rule is separate, and it reaches rentals the inspection rule never did.

Where the rule comes from

Local Law 157 of 2016 told owners to install natural gas alarms once the City adopted a standard for them. The Department of Buildings (DOB) adopted one in 2024, the first deadline was May 1, 2025, and Local Law 102 of 2025 moved it to January 1, 2027. That law allowed one more extension, to 2029, only if DOB found fewer than four manufacturers making battery-powered alarms. DOB answered on June 15, 2026: it found at least four, and its service notice says the date “will not be extended beyond January 1, 2027.”

Does it apply to your building?

The owner’s duty is in New York City Administrative Code § 27-2045. The installation rule is Title 1 of the Rules of the City of New York (RCNY) § 908-02. Between them:

• Buildings with three or more apartments (Class A multiple dwellings, in the law’s terms). Covered.
• Hotels, rooming houses and other transient buildings (Class B multiple dwellings). Covered, with the option of a wired, centrally monitored detection system in the public corridors and spaces in place of an alarm in each unit. (A unit with its own gas appliance still needs an alarm.)
• One- and two-family homes, where a unit is rented. The law calls these “private dwellings,” and for this section it defines the term narrowly: a unit occupied by someone other than the owner or the owner’s family. If you live in one unit of your two-family and rent the other, the rented unit is the one the law reaches. (I’d put one by my own stove too.)
• Not covered: a building with no gas piping or gas service. Under the housing agency’s rule, an owner claiming that exemption submits documentation to the agency.

Where the alarm goes

This is the part most likely to be done wrong, because it is not where people are used to putting detectors. From 1 RCNY § 908-02:

• In the same room as the gas appliance.
• At least 3 feet and not more than 10 feet from the appliance, measured horizontally.
• On the ceiling, or on a wall within 12 inches of the ceiling.
• If the room doesn’t allow 3 feet, or the manufacturer’s instructions call for a different spot, the rule says to follow the manufacturer or the national standard it adopts (National Fire Protection Association 715, 2023 edition).

DOB’s frequently asked questions cover the cases owners ask about:

• An apartment with no gas appliance, sitting directly over one. It still needs an alarm, in the room directly above the appliance or the gas piping, on the ceiling or within 12 inches of it. In a small building that usually means the apartment over the boiler or the gas meters.
• Gas piping in a unit or a common area, but no gas appliance there. Not required in that space.
• A common space with a gas appliance, such as a laundry room with a gas dryer. Required.
• A boiler, water heater or generator room that is “centralized and restricted.” Not required in that room. DOB gave that answer about high-rise buildings and doesn’t define the phrase for a two- or three-family, so for a basement boiler I would put one in. (The apartment above it needs its own either way.)
• Near the bedrooms. No additional alarms are required there, unless the national standard requires the alarms to be interconnected.

What to buy

• An alarm listed and labeled to UL 1484. (UL is Underwriters Laboratories, the testing organization whose mark is on most of what plugs into your wall.) Look for that number on the package. The rule names UL 1484 or UL 2075, as applicable, and DOB’s FAQ points to UL 1484 for alarms.
• Battery or plug-in is fine in an existing building. DOB’s FAQ draws the line at buildings that had a certificate of occupancy, or a temporary one, before January 1, 2027. Buildings finished after that need hardwired power with a backup.
• Battery and plug-in alarms can be installed by the owner, building maintenance staff or the tenant. Hardwired alarms need a New York City licensed electrical contractor and permits.
• A combination unit (smoke, carbon monoxide and gas in one device) is allowed, but the housing agency notes that the installation has to satisfy each device’s own rule. A combination unit by the bedroom door does not satisfy the gas rule. In most apartments, separate devices are simpler.
• DOB does not endorse any brand, and neither do I.

Who does what, and who pays

This comes from Administrative Code § 27-2045 and from the rules of the Department of Housing Preservation and Development (HPD), Title 28 RCNY, chapter 12. DOB’s FAQ says enforcement is at HPD’s discretion.

The owner:

• Provides and installs the alarm, and replaces it when the manufacturer’s suggested useful life runs out.
• Posts a notice in a common area of a building with three or more apartments. In a one- or two-family rental, the statute has the owner give the notice to the occupants. HPD publishes sample wording and the format: letters at least three-sixteenths of an inch high, in bold, on metal, plastic or a decal.
• Gives at least one adult in each unit written information on testing and maintaining the alarm, what to do when it sounds, and its useful life.
• Keeps records: the date the notice went up, the date each alarm was installed, and each alarm’s replace-by date.

The tenant:

• Keeps the alarm in good repair, and replaces it if it is stolen, removed, goes missing or stops working during the tenancy.
• May not tamper with it or disable it.
• Reimburses the owner for a newly installed or replacement battery-operated alarm: an amount not to exceed $25 per alarm ($50 for a two-in-one device, $75 for a three-in-one). HPD’s sample notice gives the tenant one year from installation to pay. This applies in buildings with three or more apartments and in one- and two-family rentals, not in hotels and rooming houses.

Where the City’s own pages don’t agree yet

I read each of these on the review date above. Where they conflict, I’ve told you which one I would rely on and why. If it matters to your building, DOB takes questions about this law at LL102of2025@buildings.nyc.gov.

• The date in DOB’s rule. The text of 1 RCNY § 908-02 still says May 1, 2025. Local Law 102 of 2025 came later and controls: January 1, 2027.
• Whether the date can move again. HPD’s Detectors page still says the date “may be extended.” DOB’s June 15, 2026 notice says it will not be, and DOB is the agency the law gave that decision to.
• Which buildings can use battery power. DOB’s FAQ says buildings with a certificate of occupancy before January 1, 2027. The codified text of 1 RCNY § 3616-06 says buildings completed before January 1, 2025. For a building that has been standing for decades, both answers are yes.
• Alarms near bedrooms. HPD’s summary table carries over the within-fifteen-feet-of-a-bedroom placement used for carbon monoxide detectors, with a qualified yes for gas. DOB’s rule puts the alarm in the room with the appliance, and its FAQ says no additional alarm is required near sleeping areas. DOB wrote the installation rule.
• The notice in a one- or two-family rental. HPD’s table says posting is for multiple dwellings only, and the text beneath it says one- and two-family homes too. The statute reads: post in a common area or, for private dwellings, provide the notice to the occupants.

What I would do this month

1. Walk the building and list every gas appliance by room, including the basement and any shared laundry.
2. Mark any apartment that sits directly over a gas appliance or gas piping.
3. Buy alarms marked UL 1484, one for each room on the list, and read the manufacturer’s placement instructions before you drill.
4. Install them, photograph each one, and write down the install date and the replace-by date.
5. Post the notice (or hand it to the tenant in a one- or two-family) and give each unit the written information.
6. Put the records where you can find them, and put the replace-by dates on a calendar.

Get the one-page checklist (PDF)