Local exhaust fans which are vented to the exterior of the building must be provided in all remodeled or newly constructed laundry areas (min. Habitable rooms must be provided with ventilation through openable window areas a minimum of four percent of the floor area, or mechanical ventilation must be provided per IRC section M1507. Habitable rooms must be provided with natural light by glazed openings not less than eight percent of the floor area, or artificial lighting must be provided.
#IRC 311 WINDOWS#
Window wells for below-grade egress windows that are deeper than 44 inches are required to have an egress ladder. Any bars, grills, or covers must be releasable from the inside without the use of any key, tool, or special knowledge.Maximum finished sill height 44 inches above the floor.
(Note: Windows at grade level or below are permitted a minimum clear opening area of 5 square feet) Minimum clear openable area of 5.7 square feet, minimum openable height of 24 inches and minimum openable width of 20 inches.
Emergency Escape and Rescue Openingsīasements and all sleeping rooms must have an emergency escape and rescue opening that leads directly to a yard or public way. If no path exists to an acceptable door in the primary residence, the ADU must have a separate egress door. The door must be side-hinged, with a clear opening width of 32 inches and height of 78 inches. The ADU must have an unobstructed path of travel to an exterior door. Bathrooms and laundry rooms must have a minimum ceiling height of six feet eight inches. Beams, ducts and other obstruction may project to within six feet eight inches in habitable rooms in basements only. Habitable rooms must have a minimum ceiling height of seven feet. Habitable rooms, not including kitchens, must have a minimum room area of 70 square feet with a minimum dimension of seven feet in any direction.
Any sleeping room containing a listed direct-vent fuel-burning appliance must have a carbon monoxide alarm installed within the room. Carbon Monoxide AlarmsĪ carbon monoxide alarm must be located outside of and in the immediate vicinity of each sleeping area and on every level of the building. Combination smoke and carbon monoxide alarms are acceptable. Smoke AlarmsĪ smoke alarm must be located within every sleeping room, outside of and in the immediate vicinity of all sleeping areas and on every level of the building. Any door separating the dwelling units must be, at minimum, a listed 45-minute fire-rated door equipped with a self-closing device. The ADU is required to be separated from the primary residence by not less than one-hour floor and wall assemblies tested per ASTM E 119 or UL 263, with penetrations in accordance with IRC R302.4.
#IRC 311 CODE#
Code Requirements Fire-Resistant SeparationĬode Reference: International Residential Code (IRC) R302 & R202įire separation is not required if all required smoke alarms in the ADU and in the primary residence are interconnected in such a manner that the actuation of any one alarm will activate all other alarms in the ADU and primary residence. This includes, but is not limited to: new or altered construction of walls, stairs, guardrails, drywall new or altered plumbing lines, added plumbing fixtures new or altered electrical circuits or fixtures and new or altered mechanical work, ducting or appliances. Permits are RequiredĪny work that is being done to the existing building, plumbing system, electrical system or mechanical system will require a permit from the city. New construction must comply with current, applicable codes (e.g., building, electrical, mechanical, plumbing, energy and indoor air quality codes). The information below is not intended to address every code requirement that may arise with your project.
The ADU inspection is separate from other inspections that you may have. Accessory dwelling units must be inspected by a land use planner prior to final occupancy approval.
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