2AgendaDefinitionsWhy designate space as Habitable Attic?RequirementsExamplesFurther help
3Habitable Attic Definition IRC Definition:ATTIC, HABITABLE. A finished or unfinished area, not considered a story, complying with all of the following requirements:1. The occupiable floor area is at least 70 square feet (17m2), in accordance with Section R304,2. The occupiable floor area has a ceiling height in accordance with Section R305, and3. The occupiable space is enclosed by the roof assembly above, knee walls (if applicable) on the sides and the floor-ceiling assembly below.
4Why Designate Space as Habitable Attic? Enables Designer to gain a 5th Floor while staying in IRC
5Habitable Attic Requirements Minimum floor area (70ft2)Minimum ceiling height (5’ for > 50% of room)Minimum floor loading (30psf Live)Fixed stairwaySmoke alarmEmergency egress window
6Habitable Attic Examples Bonus Rooms above a GarageAny attic above a relatively wide house where the rafters create enough headroom & is serviced by a fixed stair
7Habitable Attic – Further Reading Pennsylvania Housing Research CenterHabitable Attics