# Smoke & CO Detectors in Quantico, VA | Electric Sandro

Page: https://electricsandro.com/services/smoke-and-co-detectors/
Business: Electric Sandro | (571) 402-2540 | Quantico, VA
Updated: 2026-11-10

[Home](/) / [Services](/services/) / Smoke & CO Detectors

# Smoke & Carbon Monoxide Detector Installation in Quantico & Northern Virginia

We replace old hardwired smoke alarms and add smoke and carbon monoxide (CO) alarms where your home needs them, linked so one alarm sets off all of them. Replacing alarms on existing wiring usually takes one visit of a few hours for a whole house.

-   Expert electrician
-   20+ years of experience in the industry
-   Emergency calls 24/7

![Electric Sandro hanging a crystal chandelier in a dining room](/images/electric-sandro-crystal-chandelier-installation-800.webp)

Signs you need it

## When to call

-   Your smoke alarms are 10 years old or older (check the date on the back)
-   An alarm chirps even after a new battery
-   You have gas heat, a gas stove, a fireplace or an attached garage, and no CO alarm
-   Your alarms are not linked, so one alarm does not set off the others
-   You finished a basement or added a bedroom

What we do

## Step by step

1.  We check the alarms you have, their age and how they are wired.
2.  We plan where each smoke and CO alarm should go.
3.  We agree on the price and a time.
4.  We replace or add the alarms, link them, and set the backup batteries.
5.  We test every alarm so you hear them all sound together.

Price

## What it costs

### Typical Northern Virginia market range (not a quote)

Job

Market range

Hardwired smoke or combo smoke/CO detector, replace existing (unit included)

$100 to $200 per detector

Market data for Northern Virginia, not a quote from Electric Sandro. Checked November 2026. Sources: [Angi](https://www.angi.com/articles/smoke-detector-installation-cost.htm), [HomeGuide](https://homeguide.com/costs/electrical-work-pricing-guide), [Fixr](https://www.fixr.com/costs/smoke-detector-installation), and prices published by one Northern Virginia electrician. Your price depends on your home, the parts and the permit fee.

[Try the Smoke and CO Detector Calculator](/tools/smoke-detector-calculator/)

Permit and inspection

## Done to code

Swapping a hardwired alarm on the same wiring is simple work. Adding new alarm locations means new wiring, which may need a permit in your county or city. We tell you which applies before we start.

Check the rule for your town in our [Northern Virginia electrical permit checker](/electrical-permit-checker/).

Photos

## Smoke & CO Detectors: our work and ideas

Photos marked "by Electric Sandro" are real jobs. Others show the kind of work we do.

![Round smoke detector and a small alarm module mounted on a white ceiling](/images/smoke-detector-on-white-ceiling-800.webp)

![White smart smoke detector next to a home security camera and a small motion sensor](/images/smart-smoke-detector-security-camera-motion-sensor-800.webp)

![Round white smoke detector beside a home security camera and two glowing LED bulbs](/images/smoke-detector-security-camera-led-bulbs-800.webp)

![Electric Sandro installing a ceiling light fixture](/images/electric-sandro-ceiling-light-fixture-install-800.webp)

Ceiling light fixture install by Electric Sandro

![Electrician fitting a bulb into a new multi-shade ceiling light in a modern home](/images/electrician-installing-ceiling-light-fixture-modern-home-800.webp)

## Smoke & CO Detectors questions

Straight answers to what Northern Virginia homeowners ask most.

![Zappy holding a smoke detector and a carbon monoxide detector](/brand/zappy/zappy-electric-sandro-mascot-smoke-co-detectors-300.webp)

How often should smoke detectors be replaced?

The National Fire Protection Association says to replace smoke alarms when they are 10 years old. The date is printed on the back of the alarm.

Where should smoke alarms go in a house?

The NFPA recommends one inside each bedroom, one outside each sleeping area, and one on every level of the home, including the basement.

Where should a carbon monoxide detector go?

Put CO alarms outside each sleeping area and on every level of the home, as the alarm maker directs. Homes with gas appliances, a fireplace or an attached garage need them most.

Why is my hardwired smoke detector chirping?

A single chirp every minute or so usually means the backup battery is low. If it keeps chirping with a new battery, the alarm may be at the end of its life and needs replacing.

Do hardwired smoke detectors have batteries?

Most have a backup battery, so they still work during a power outage. Some newer models have a sealed 10-year battery.

## Smoke & CO Detectors near you

-   [Quantico](/)
-   [Triangle](/areas/triangle/)
-   [Dumfries](/areas/dumfries/)
-   [Cherry Hill](/areas/cherry-hill/)
-   [Leesylvania](/areas/leesylvania/)
-   [Montclair](/areas/montclair/)
-   [Aquia Harbour](/areas/aquia-harbour/)
-   [Hampton Oaks](/areas/hampton-oaks/)
-   [Embrey Mill](/areas/embrey-mill/)
-   [Courthouse Square](/areas/courthouse-square/)
-   [Potomac Mills](/areas/potomac-mills/)

## Other services

[### Electrical Panel Upgrades

Replace an old, full or unsafe breaker panel. Move up to 200 amps for EV chargers, heat pumps and new rooms.

Learn more →](/services/panel-upgrade/) [### EV Charger Installation

Level 2 home chargers and 240 volt outlets, wired to code, so your car is full every morning.

Learn more →](/services/ev-charger-installation/) [### Whole-House Surge Protection

A surge protector at your panel guards every circuit: HVAC, appliances, chargers and electronics.

Learn more →](/services/whole-house-surge-protection/) [

### Lighting Installation

Recessed LED lights, pendants, chandeliers, under-cabinet and vanity lights, plus dimmers.

Learn more →](/services/lighting-installation/)

![Zappy, the Electric Sandro mascot, in a round badge](/brand/zappy/zappy-electric-sandro-mascot-icon-300.webp)

## About Electric Sandro

Electric Sandro is an expert electrician business with 20+ years of experience in the industry, based in Quantico, VA and serving homes and businesses across Northern Virginia. Mon-Fri 7:00 am - 5:00 pm. Emergency calls 24/7.

[About Sandro](/about/) · [Photos of our work](/our-work/) · [(571) 402-2540](tel:+15714022540)

Last updated November 7, 2026. Sources: [NFPA: smoke alarms](https://nfpa.org/education-and-research/home-fire-safety/smoke-alarms), [Virginia USBC section 108 (permits and exempt work)](https://law.lis.virginia.gov/admincode/title13/agency5/chapter63/section80/), [Virginia DHCD: building codes in force](https://dhcd.virginia.gov/codes).

![Electrician holding a white hard hat](/images/electrician-holding-white-hard-hat-800.webp)

## Need an electrician you can trust?

Tell us about the job. We call you back, explain the work in plain words and set a time.

[Get a quote](/contact/#quote) [Call now](tel:+15714022540)

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