Fire alarm contractors
They design, install, verify, inspect and repair fire alarm systems: control panels, smoke and heat detectors, pull stations, horns and strobes, and the wiring that connects them. In Canada a new or altered system needs a formal verification before occupancy, then an annual inspection with a written report. They also replace interconnected smoke and CO alarms in multi-unit residential buildings.
Who needs one
Businesses: the building code decides whether a fire alarm system is required, based on occupancy and occupant load (e.g., most assembly, care, multi-unit residential, and larger business, mercantile and industrial buildings). Once it is installed, the owner must have it tested annually. Homes: single-family homes need code-required smoke alarms (and CO alarms where there is a fuel-burning appliance or attached garage), but not a fire alarm 'system' or a contractor. Landlords of multi-unit buildings usually do.
How often
Canada: annual inspection and test of the whole system by a qualified technician (CAN/ULC-S536), plus owner checks set out in the fire code (daily trouble-light check, and monthly checks of batteries and a rotating manual station in many provinces). US (NFPA 72, Ch. 14): most initiating and notification devices tested annually, batteries and some equipment semi-annually, and smoke detector sensitivity checked within a year of installation and then every 2 years. Both: household smoke alarms replaced at 10 years; CO alarms replaced per the manufacturer (typically 7–10 years).
What it costs
Annual inspection and testing for a small commercial building: about US$200–1,000+ (CA$275–1,400+) (Safe and Sound Security 2026 guide). Ontario contractors say S536-19 inspections take 20–35% longer than before, so expect Ontario quotes to rise by about that much. New commercial system: about US$1–3 per sq ft in new construction and US$4–12 per sq ft as a retrofit in an occupied building, or US$2,000–10,000 under 5,000 sq ft. Labour about US$100–200 per hour.
Codes and standards
- Canada
- Installation: CAN/ULC-S524. Verification of new or altered systems: CAN/ULC-S537. Annual inspection and testing: CAN/ULC-S536, referenced by the NFC and provincial fire codes. Ontario moved to CAN/ULC-S536-19 for annual inspections from 1 Jan 2026, with every device tested individually (no sampling) and longer reports. Smoke alarms: CAN/ULC-S531. Integrated systems testing: CAN/ULC-S1001 (adopted in Quebec's code and others).
- United States
- NFPA 72 (National Fire Alarm and Signaling Code) covers installation, ITM and household alarms. It is adopted through the IBC/IFC or NFPA 1/NFPA 101, with NFPA 70 (NEC) for wiring. Integrated systems testing: NFPA 4. The state or local edition adopted can lag the current NFPA edition.
Licences and credentials to look for
- Canada
- Ontario: the Fire Code requires people who do annual tests or repairs to have completed a program acceptable to the Fire Marshal. In practice that means CFAA Registered Technician (or an equivalent ECAO/electrician-based program). BC: ASTTBC Registered Fire Protection Technician with the 'AL' designation. Elsewhere: CFAA registration is the de facto national credential. Installation work also needs a licensed electrical contractor (e.g., ESA/ECRA licence in Ontario; RBQ licence and CMEQ membership for electrical contractors in Quebec).
- United States
- A state or local fire-alarm or low-voltage contractor licence (e.g., California CSLB C-10 Electrical, or C-7 Low Voltage depending on scope; Texas SFMO fire alarm licence). NICET certification in Fire Alarm Systems or Inspection & Testing of Fire Alarm Systems, with Level II commonly asked for. Factory-authorized dealer status for the panel brand (so they can get parts and software).
Questions to ask and red flags
- Ask for the technician's CFAA registration number (Canada), ASTTBC 'AL' (BC) or NICET level (US), not just the company's credentials. The person on site is the one who must be qualified.
- Ask whether their annual report is on the current CAN/ULC-S536 (or NFPA 72) forms and lists every device tested. Sampling is no longer acceptable in Ontario.
- Ask whether the panel is proprietary, so only one dealer can program it. If so, get the service rates in writing before you sign.
- Ask how they handle deficiencies: a written list with prices, which you then sign off on.
- Red flag: an 'inspection' finished in an hour on a multi-floor building, or no inspection tags or report left on site.
What they install or service: Commercial Fire Alarm & Detection · Smoke & Carbon Monoxide Alarms