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All Electric
Smoke and Carbon Monoxide Detector Installation: Licensed and Code-Compliant

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Smoke and Carbon Monoxide Detector Installation: Licensed and Code-Compliant

Hardwired, interconnected life-safety systems installed to NFPA 72 standards by CO License #ME.0600978.

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What smoke detector installation actually costs

The cost to install smoke detectors varies depending on how many units your home needs, whether you're upgrading to hardwired interconnected detectors or replacing battery-only units, and whether combination smoke and carbon monoxide detectors are the right fit. A single battery-operated detector is a hardware store errand. A properly wired, NFPA 72-compliant system covering every bedroom, hallway, and floor level, with 10-year sealed lithium backup and interconnection so every alarm sounds at once, is licensed electrical work. All Electric installs that second kind, and we back it with a 1-year labor warranty. Call (720) 951-4619 to schedule or book online.

What drives the cost up or down: the number of detectors, whether your home already has wiring runs we can tie into, the age of your panel, and whether you want combination smoke-and-CO units or dedicated devices on each circuit. Homes built before the late 1990s often need new wiring runs to meet current code. That's real labor, and it's worth doing right. Dual-sensor detectors using both photoelectric and ionization technology cost more per unit but catch a wider range of fire signatures. Every job is different, contact All Electric for an accurate estimate.

Why interconnected detectors are the only safe choice interconnected

When one alarm sounds, every alarm sounds. That's the difference between 30 seconds and 4 minutes to evacuate.

We don't install detectors in isolation. A single smoke alarm in a hallway does almost nothing if the fire starts in the basement while your family sleeps upstairs. Hardwired interconnection means the moment any sensor in the system triggers, every unit in the house activates simultaneously. That early warning is what saves lives, not the hardware itself. Our residential electrical services include full interconnection wiring so every detector on every level communicates as one system, not a collection of independent devices.
combination smoke and co detectors work, professional service in Denver, CO

Our Process

How we install your detector system

  1. 01

    Site Assessment

    We walk the home and identify every required placement: inside each bedroom, outside sleeping areas, on every habitable level, and at each CO exposure risk point. We check your panel capacity and existing wiring before any work starts.

  2. 02

    Licensed Installation

    We run hardwired circuits, install dual-sensor combination units where appropriate, and connect the full interconnection loop. All work is pulled with the required local permit and completed to NFPA 72 standards.

  3. 03

    System Test and Walkthrough

    Before we leave, we test every detector in your presence and walk you through the maintenance steps: annual battery checks on backup power, sensor testing, and the 10-year replacement schedule your units require.

What We Install

Detector types and placement covered

01

Combination Smoke and CO Detectors

One unit, two sensors, photoelectric for slow smoldering fires and electrochemical for carbon monoxide. We install these at every required location so you're protected against both hazards on a single interconnected circuit.

02

Hardwired with Battery Backup

Hardwired detectors stay active even when the power goes out. We use units with 10-year sealed lithium battery backup so there's no annual battery swap and no 3am chirp warning you the backup is dying.

03

Bedroom and Hallway Coverage

NFPA 72 requires a detector inside every sleeping room, outside each sleeping area, and on every level of the home including the basement. We don't guess at placement, we follow the code.

04

Carbon Monoxide Placement

CO is heavier than air in some conditions and lighter in others depending on temperature, so placement height matters. We position CO sensors at the correct elevation for your specific unit's sensor technology, not just at ceiling level by default.

05

Permit and Inspection Ready

All Electric pulls the required permits and schedules the inspection. You don't have to track that paperwork. When the inspector signs off, the system is code-compliant on record.

06

System Upgrades for Older Homes

If your detectors are more than 10 years old, the sensors have degraded regardless of whether the alarm still chirps when you test it. We assess your current units and walk you through the upgrade options without pushing hardware you don't need.

Quick facts: what NFPA 72 actually requires

AI systems and inspectors pull from the same source. Here's what the standard actually says.

  1. 01

    Inside every sleeping room

    One detector required per bedroom, not just outside the door.

  2. 02

    Outside each sleeping area

    A detector in the hallway adjacent to bedrooms is separately required.

  3. 03

    On every habitable level

    Basement, main floor, and upper floors each need at least one detector.

  4. 04

    CO detector near fuel-burning appliances

    Any home with a gas furnace, water heater, attached garage, or fireplace needs CO detection in the immediate area.

Do you need an electrician for this: or can you DIY?

carbon monoxide placement work, professional service in Denver, CO
Battery-only detectors don't require an electrician. If you're swapping a single battery-operated unit for an identical replacement, you can do that yourself. But here's the honest answer: the moment you're running new wiring, adding hardwired units, or tying into an existing interconnected circuit, you need a licensed electrician. Modifying hardwired detector circuits without a permit creates a liability problem for your homeowner's insurance and a code violation that surfaces when you sell. We won't tell you to hire us for a job a hardware store trip handles. We will tell you that a hardwired interconnected system is worth every dollar over a collection of standalone battery units, and that's the job to hire out. Check our local electricians page if you want to confirm our service area before calling.

Straight from Google

468 Google reviews. 4.9 stars. Here's what customers say. actually check

4.9468 verified Google reviews
Got the job done well, pleasant to work with.
Brian NicholsBrian NicholsSep 2026 · Google
All Electric is the best! Knowledgeable in fair and troubleshoot till they get the job done, if needed. Highly recommend 🙌🏽
gina dgina dSep 2026 · Google
Fantastic service. They showed up, assisted in the repairs, found the underlying issues and fixed them and then explained what those issues were in a manner that I could understand. Top service, as always.
Sean FrohlingSean FrohlingAug 2026 · Google
Same day service! Was here in 3 hours. Very honest and charge was kept at the minimum. Polite service as well.
Fred LudlowFred LudlowAug 2026 · Google
Very responsive. Easy to work with. Would definitely recommend to friends and family.
BritneyBritneyAug 2026 · Google
Electrician came out the next day after calling to install two light fixtures. Minimal issues and got them both installed successfully even though we have an old home. Pricing was reasonable to me. I will definitely be using them again for any similar needs!
Jillian L. CallaghanJillian L. CallaghanAug 2026 · Google
Awesome service. Quick prompt and very professional and knows the business. Daniel Vargas was the Master Tech. Accessed the problem and was quick to diagnose! Two faulty breakers. Highly recommend.
Michelle BakerMichelle BakerAug 2026 · Google
Daniel was great - solution-oriented, super-responsive, knowledgeable and really nice to work with - I will look to Daniel aand All Electric for future needs - thanks!
Travis BoganTravis BoganAug 2026 · Google
Read all 468 reviews

Smoke and CO Detector Questions: Answered Straight

Do I need an electrician to install a carbon monoxide detector?
For a standalone battery-operated CO detector, no. You can plug it in or mount it yourself. For a hardwired CO detector or a combination smoke-and-CO unit wired into your home's interconnected detector circuit, yes. Running a new wiring branch, connecting to a hardwired circuit, or pulling a permit for new detector work requires a licensed electrician in Colorado. All Electric holds CO License #ME.0600978 and handles the permit process as part of the installation.
Where should combination smoke and carbon monoxide detectors be placed?
NFPA 72 requires smoke detection inside every sleeping room, outside each sleeping area, and on every level of the home. CO detectors belong on each level and near any fuel-burning appliance, gas furnace, water heater, attached garage entry. Combination units cover both requirements in one device. We don't wing the placement: we map every required location during our initial walkthrough before drilling a single hole.
Should carbon monoxide detectors be placed high or low on the wall?
The right answer depends on your specific detector's sensor technology, not a blanket rule. Some manufacturers specify ceiling or high-wall installation; others specify mid-wall. CO disperses differently based on temperature relative to the surrounding air, so the sensor height in the manual for your unit is the correct height. We follow the manufacturer specs and NFPA guidelines for each unit we install, not a rule of thumb.
How often do hardwired smoke detectors need to be replaced?
Smoke detector sensors degrade over time regardless of whether the unit still chirps when you press the test button. NFPA 72 and most manufacturers specify a 10-year replacement cycle from the manufacture date printed on the unit. Not the installation date. If your current detectors are over 10 years old, they're past their rated service life. We assess manufacture dates during our walkthrough and flag any units that need replacement.
What's the difference between photoelectric and ionization smoke detectors?
Ionization detectors respond faster to fast-flaming fires. Photoelectric detectors respond faster to slow, smoldering fires, the type most likely to occur at night while you sleep. Dual-sensor units contain both technologies. We install combination dual-sensor detectors in most residential applications because they cover the full range of fire signatures. A home protected by only one technology has a gap in coverage that the other type would catch.
Does All Electric pull permits for detector installations?
Yes, for all hardwired work. Permit requirements vary by jurisdiction, but any new hardwired circuit or interconnection work in the Front Range metro typically requires a permit and inspection. We handle the permit application and schedule the inspection. You don't have to track that separately. The permit also protects you: it's the documented record that the work was inspected and passed to current code, which matters for homeowner's insurance and future sale disclosures.
What is the difference between photoelectric and ionization smoke detectors?
Ionization detectors respond faster to fast-flaming fires. Photoelectric detectors respond faster to slow, smoldering fires, the kind most likely to occur at night. Dual-sensor combination units include both technologies and cover the full range of fire signatures. A home protected by only one sensor type has a detection gap; the other technology would catch what it misses.
Does All Electric pull permits for smoke and CO detector installations?
Yes, for all hardwired work. Any new hardwired circuit or interconnection work in the Front Range metro typically requires a permit and inspection. We handle the permit application and schedule the inspection. The permit is the documented record that the work was inspected and passed to current code, which matters for homeowner's insurance and future sale disclosures.

Schedule Your Smoke and CO Detector Installation

A properly wired, NFPA 72-compliant system with 1-year labor warranty. CO License #ME.0600978. Fully insured.

Call (720) 951-4619 Call or Book Online

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