New Castle County, DE Building Safety: Carbon Monoxide Detectors (2026)
Key Facts
- Trigger
- Licensed in-home child care within a dwelling
- Requirement
- CO detection per IBC Section B915
- Paired requirement
- Smoke alarms per Section B907
- Territorial scope
- Unincorporated county, plus opt-in municipalities
- Not covered here
- Wilmington and Newark run separate codes
Summary
New Castle County requires carbon monoxide detectors in dwellings licensed for in-home child care, under a Building Code amendment to IBC Section B310.4.1: the code's only carbon monoxide provision; ordinary single-family homes have no separate county CO-alarm mandate.
...the following restrictions are met: (i) A license shall be obtained from the State of Delaware Department of Services of Children, Youth, and Their Families. All regulations of such Department shall be met; (ii) Rooms to be occupied by infants shall have a direct path of egress, on the same floor level, to the exterior of the house; (iii) Smoke alarms shall be installed in accordance with Section B907; (iv) Carbon monoxide detection shall be installed in accordance with Section B915.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 5).
Full Breakdown
New Castle County's Building Code amendments (Sec. 6.04.002) modify International Building Code Section B310.4.1, "Care facilities within a dwelling," for homes licensed by the state to care for children. Where such a facility operates, the amendment requires "Carbon monoxide detection shall be installed in accordance with Section B915," alongside smoke alarms under Section B907 and a state childcare license from the Delaware Department of Services for Children, Youth and Their Families. This is the code's only carbon monoxide provision: it creates no stand-alone CO-alarm mandate for ordinary owner-occupied houses; those are built under the 2024 International Residential Code, adopted wholesale by Sec. 6.05.001. The Building Code applies to unincorporated New Castle County and may extend into an incorporated municipality only if that municipality's governing body elects to be included. Wilmington and Newark enforce their own separate building codes, not this chapter.
Violations & Fines
Code Official inspection can flag a non-compliant licensed care facility during permitting or a complaint-driven inspection; failure to install required detection blocks certificate of occupancy/use and can trigger the Chapter's general enforcement and civil-penalty provisions for Building Code violations.
Frequently Asked Questions
Does New Castle County require carbon monoxide detectors in every home?
Does this rule reach homes inside Wilmington or Newark?
What governs CO safety in an ordinary single-family home?
Sources & Official References
Other rules in New Castle County
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