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Fairfax County, VA Building Safety: Carbon Monoxide Detectors (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified August 2026

Key Facts

Applies to
Licensed home child care facilities only
CO alarm standard
Per manufacturer specs where CO-producing appliances exist
Testing
Monthly, records kept for Fire Code Official
Companion rule
Same monthly-test duty for smoke alarms (subsec. (u))
Permit violation penalty
Class 2 misdemeanor (§30-3-9(a))
Appeal window
10 business days to request a hearing

Summary

Licensed home child care facilities in Fairfax County must install an operable carbon monoxide alarm wherever appliances could produce CO, test it monthly and keep the test records for the Fire Code Official. The rule sits inside the county's broader home child care fire safety standards, alongside a matching smoke alarm requirement.

These county ordinances apply to unincorporated areas of Fairfax County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

(u)An operable smoke alarm shall be provided outside of each sleeping area, with at least one such device on each floor. Each smoke alarm shall be tested at least once a month and records of testing provided to the Fairfax County Fire Code Official upon request. Smoke alarms may be of the fixed-wired or battery type.(v)An operable carbon monoxide alarm shall be installed in homes according to the manufacturer's specifications where appliances may produce carbon monoxide. Each carbon monoxide alarm shall be tested at least once a month and records of testing provided to the Fairfax County Fire Code Official upon request.

Full Breakdown

" It sits alongside subsection (u), which imposes an identical monthly-testing, record-keeping duty for smoke alarms, one of which must be located on every floor and outside each sleeping area. The same fire-safety article requires furnace and heating-appliance flues to be free of leaks (subsection (t)), bars unvented portable fuel-fired heaters outside single-family R-5 dwellings (subsection (l)), and requires annual inspection and cleaning of fireplaces, wood stoves and chimneys with proof kept on site (subsection (p)). These duties apply specifically to home child care providers, not to Fairfax County residences generally.

The Director of Early Childhood Programs and Services may inspect any home child care facility for compliance under Section 30-3-8, with a warrant required if consent is refused.

Violations & Fines

Operating a home child care facility without the required permit is a Class 2 misdemeanor under Section 30-3-9(a), tied to the county's general penalty at Section 1-1-12. A CO-alarm or other fire-safety violation by a permitted provider instead triggers administrative action: the Director of Early Childhood Programs and Services may suspend or revoke the permit, normally after at least ten calendar days' written notice, or immediately if exigent health and safety conditions exist. A provider whose permit is denied, suspended or revoked can request a hearing in writing within ten business days under Section 30-3-10.

Frequently Asked Questions

Does this CO alarm rule apply to every Fairfax County home?
No. Section 30-3-6.1 sits inside the fire safety article for licensed home child care facilities, so the specific monthly-tested carbon monoxide alarm duty applies to homes operating as permitted child care providers, not to residences generally.
How often must the CO alarm be tested?
At least once a month. The provider must keep testing records on site and produce them to the Fairfax County Fire Code Official on request, the same standard the Code sets for the required smoke alarms under subsection (u).
What happens if a provider skips the CO alarm requirement?
The Director of Early Childhood Programs and Services can pursue administrative action under Section 30-3-9, including suspending or revoking the facility's permit, generally after ten days' written notice unless the condition is an immediate health and safety hazard.

Sources & Official References

Other rules in Fairfax County

All Fairfax County rules

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