Page 38 - The Tiny House Tactical Guide, 2018 Edition

CHAPTER 09

NEW CODE FOR SITE-

BUILT TINY HOUSES

The residential building code makes specific rules about

minimum sizes in site-built homes (which include tiny dwellings).

The new Appendix Q in the IRC 2018 code addresses ceiling

heights, fire egress and stairways in tiny homes.

APPENDIX Q ■ ■ LANDING PLATFORM. A landing provided as the top step of a
stairway accessing a loft.
TINY HOUSES ■ ■ LOFT. A floor level located more than 30 inches (762 mm) above
the main floor, open to the main floor on one or more sides with
This provisions contained in this appendix are a ceiling height of less than 6 feet 8 inches (2032 mm) and used
not mandatory unless specifically referenced as a living or sleeping space.
in the adopting ordinance. ■ ■ TINY HOUSE. A dwelling that is 400 square feet (37 m ) or less in
floor area excluding lofts.
User note about this appendix: Appendix Q relaxes various
requirements in the body of the code as they apply to SECTION AQ103
houses that are 400 square feet in area or less. Attention ■ ■ 2
is specifically paid to features such as compact stairs, ■ ■ 1/4
including stair handrails and headroom, ladders, reduced CEILING HEIGHT
ceiling heights in lofts and guard and emergency escape and AQ103.1Minimum ceiling height.
rescue opening requirements at lofts. Habitable space and hallways in tiny houses shall have a ceiling
height of not less than 6 feet 8 inches (2,032 mm). Bathrooms, toilet
rooms and kitchens shall have a ceiling height of not less than 6
SECTION AQ101 feet 4 inches (1,930 mm). Obstructions including, but not limited
GENERAL to, beams, girders, ducts and lighting, shall not extend below these
AQ101.1 Scope. minimum ceiling heights.
This appendix shall be applicable to tiny houses used as single Exception: Ceiling heights in lofts are permitted to be less than 6 feet
dwelling units. Tiny houses shall comply with this code except as 8 inches (2,032 mm).
otherwise stated in this appendix.
AQ102.1 General. SECTION AQ104
The following words and terms shall, for the purposes of this LOFTS
appendix, have the meanings shown herein. Refer to Chapter 2 of AQ104.1 Minimum loft area and dimensions.
this code for general definitions. Lofts used as a sleeping or living space shall meet the minimum
■ EGRESS ROOF ACCESS WINDOW. A skylight or roof window area and dimension requirements of Sections AQ104.1.1 through
■
designed and installed to satisfy the emergency escape and rescue AQ104.1.3.
opening requirements of Section R310.2. AQ104.1.1 Minimum area.
Lofts shall have a floor area of not less than 35 square feet (3.25 m ).

38 THE TINY HOUSE TACTICAL GUIDE