# Smoke and CO Detectors in Dumfries, VA | Electric Sandro

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

[Home](/) / [Dumfries, VA](/areas/dumfries/) / Smoke & CO Detectors

# Smoke and CO Detector Installation in Dumfries, VA

Smoke alarms should be replaced every 10 years, and most Dumfries homes were built in the 1970s and 1980s, so any alarm left from those years is long past its life. About 4 in 10 homes in town heat with utility gas and more use propane, so a carbon monoxide alarm on each level matters here too.

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## Smoke & CO Detectors in Dumfries: the facts

Replace smoke alarms

[Every 10 years, per the U.S. Fire Administration](https://www.usfa.fema.gov/prevention/home-fires/prepare-for-fire/smoke-alarms/)

Gas heat in town

[About 730 of 1,759 occupied homes heat with utility gas and 81 with propane (Census ACS 2020-2024)](https://censusreporter.org/data/table/?table=B25040&geo_ids=16000US5123760)

Gas company

[Washington Gas or Columbia Gas; Washington Gas says some parts of Prince William County are Columbia Gas](https://www.washingtongas.com/services/contractors/service-territory)

County fire safety line

[Prince William County Fire and Rescue fire safety education: 703-792-7736](https://www.pwcva.gov/department/fire-rescue/community-safety-programs)

Permit for hardwired alarms

[Unconfirmed for a like-for-like swap; new wiring needs a permit. Ask Dumfries Town Hall, 703-221-3400](https://law.lis.virginia.gov/admincode/title13/agency5/chapter63/section80/)

Drive from our base

About 14 minutes (5.8 miles) from our base in Quantico, without traffic

## How old are the alarms in your Dumfries home?

The [U.S. Fire Administration](https://www.usfa.fema.gov/prevention/home-fires/prepare-for-fire/smoke-alarms/) says to get new smoke alarms every 10 years. It also says to put them inside and outside each bedroom and on every level, and to choose interconnected alarms so that when one sounds, they all sound.

In Dumfries, the median home was built in 1983, and about 992 homes went up in the 1970s and 1980s ([Census ACS](https://censusreporter.org/profiles/16000US5123760-dumfries-va/)). Hardwired alarms put in when those homes were new have been due for a change for decades. Look at the back of each alarm for a date. If it is more than 10 years old, or has no date at all, replace it.

Older hardwired systems may also have fewer alarms than today's code asks for new work. If a home has one alarm in the hall and none in the bedrooms, adding alarms means new wire, and new wire needs a permit.

## Gas and propane heat in Dumfries: why CO alarms matter

Carbon monoxide comes from fuel-burning appliances like furnaces, water heaters and ranges. The [Census ACS](https://censusreporter.org/data/table/?table=B25040&geo_ids=16000US5123760) shows about 730 occupied homes in Dumfries heat with utility gas and about 81 with bottled or tank gas. A gas range or gas water heater counts too, even in a home with electric heat.

Natural gas in Prince William County comes from [Washington Gas](https://www.washingtongas.com/services/contractors/service-territory), which notes that some areas of the county are served by Columbia Gas instead. Your gas bill shows which one serves your home. Either way, the gas company handles leaks and the meter. CO alarms are your job inside the home.

The [CPSC](https://www.cpsc.gov/safety-education/safety-guides/carbon-monoxide/carbon-monoxide-fact-sheet) advises CO alarms on each level of the home and outside sleeping areas, and says interconnected units are good to have. It does not advise putting them in the kitchen or right above a fuel-burning appliance. Combination smoke and CO alarms can cover both jobs from one box.

## Permits and county help for smoke alarms in Dumfries

Smoke alarms are not named in the state list of exempt work. The [state building code](https://law.lis.virginia.gov/admincode/title13/agency5/chapter63/section80/) lets a building official treat some small jobs as minor work, but we could not confirm how the Dumfries office treats a like-for-like hardwired swap. Ask Town Hall at 703-221-3400. Adding new hardwired alarms is new wiring and needs a permit from the town.

Dumfries is in Prince William County, and county [Fire and Rescue](https://www.pwcva.gov/department/fire-rescue/community-safety-programs) runs fire safety education. Its page says to have a working alarm on each level and in or near each bedroom, and it lists 703-792-7736 for questions. If you rent, the county reminds you that your landlord is responsible for providing smoke alarms. About 22% of occupied homes in Dumfries are rented ([Census ACS](https://censusreporter.org/profiles/16000US5123760-dumfries-va/)).

## 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 rule here

Town of Dumfries, checked 2026-11-07

Replace a smoke alarm

[Unconfirmed: call the office](https://law.lis.virginia.gov/admincode/title13/agency5/chapter63/section80/)

[All rules for Town of Dumfries](/electrical-permit-checker/#town-of-dumfries)

## Smoke & CO Detectors questions in Dumfries

What Dumfries homeowners ask about smoke & co detectors.

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

How often should I replace smoke alarms in my Dumfries home?

Every 10 years. Most homes in Dumfries date from the 1970s and 1980s, so original alarms are well past that. Check the date on the back of each one.

Do I need a CO alarm in a Dumfries home with gas heat?

It is a good idea. The CPSC advises CO alarms on each level and outside sleeping areas. About 4 in 10 homes in town heat with utility gas, and more use propane.

Do I need a permit to replace hardwired smoke alarms in Dumfries?

We could not confirm it for a like-for-like swap. Smoke alarms are not named in the state exempt list, and the town office decides. Adding new hardwired alarms does need a town permit.

Who is responsible for smoke alarms in a Dumfries rental?

Prince William County Fire and Rescue says the landlord is responsible for providing smoke alarms. Tenants can call the county fire safety line at 703-792-7736 with questions.

[All electrical services in Dumfries](/areas/dumfries/) · [About our smoke & co detectors service](/services/smoke-and-co-detectors/)

## More in Dumfries

-   [Ceiling Fan Installation](/areas/dumfries/ceiling-fan-installation/)
-   [Commercial Electrical](/areas/dumfries/commercial-electrical/)
-   [EV Charger Installation](/areas/dumfries/ev-charger-installation/)
-   [Electrical Troubleshooting & Repair](/areas/dumfries/electrical-troubleshooting/)
-   [Electrical Panel Upgrades](/areas/dumfries/panel-upgrade/)
-   [Lighting Installation](/areas/dumfries/lighting-installation/)
-   [Outlets, Switches & GFCI](/areas/dumfries/outlets-and-switches/)
-   [Remodel Wiring & Rewiring](/areas/dumfries/remodel-and-rewiring/)
-   [Whole-House Surge Protection](/areas/dumfries/whole-house-surge-protection/)

## Smoke & CO Detectors nearby

-   [Cherry Hill](/areas/cherry-hill/smoke-and-co-detectors/)
-   [Montclair](/areas/montclair/smoke-and-co-detectors/)
-   [Triangle](/areas/triangle/smoke-and-co-detectors/)

**Sources** (checked 2026-11-07): [U.S. Fire Administration: Smoke alarms](https://www.usfa.fema.gov/prevention/home-fires/prepare-for-fire/smoke-alarms/) · [CPSC: Carbon Monoxide Fact Sheet](https://www.cpsc.gov/safety-education/safety-guides/carbon-monoxide/carbon-monoxide-fact-sheet) · [Prince William County Fire and Rescue: Community Safety Programs](https://www.pwcva.gov/department/fire-rescue/community-safety-programs) · [Virginia Administrative Code 13VAC5-63-80 (USBC 108, permits and exemptions)](https://law.lis.virginia.gov/admincode/title13/agency5/chapter63/section80/) · [Washington Gas: Service territory](https://www.washingtongas.com/services/contractors/service-territory) · [Census Reporter: Dumfries house heating fuel (B25040)](https://censusreporter.org/data/table/?table=B25040&geo_ids=16000US5123760) · [Census Reporter: Dumfries town (ACS 2020-2024)](https://censusreporter.org/profiles/16000US5123760-dumfries-va/).

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## 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.

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

## Smoke & CO Detectors in Dumfries?

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

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