Our attic is entirely unfinished – exposed floor and wall studs. It has windows and is wired for a single light fixture. There is a fixed staircase up to the attic from the second floor where 19.5 is on the diagram below.
I've done some basic code research and as we only have 7.5 feet of height along the unfinished centerline, we clearly don't meet the "50% of the usable floor space should have a ceiling height of 7.5 ft or more" requirement.
Based on my approximations, we have about 400 square feet of area with 4 feet or more of height. I'd like to make use of it somehow other than just dry storage – even if it just means a carpeted play area for our children.
What are the implications of not meeting that height code? Would a contractor refuse to take the job? Would a DIY project be subject to fines? Why does the height even matter? I can understand not wanting someone to misrepresent it as a bedroom but any prospective buyer would immediately understand the reality of the situation upon climbing the stairs.
We're in Illinois if it matters. I'm having trouble finding anything other than "the code says" …
Best Answer
You say you don’t like answers that start with, “...the Code says...”, but I say, the Code says, “Habitable rooms, hallways and basements containing habitable spaces shall have a ceiling height of 7’ min. (ICC R305)
Also, it says, “ For rooms with sloped ceilings, the required floor area of the room shall have a ceiling height of not less than 5’ and not less than 50% shall have a ceiling height of 7’.”
It also says, “Conversion of basements and attics to habitable space shall provide a minimum height of 6’-8”.”
I’d quit arguing with people and go see your local Building Official and get a copy of Section 305 AND read it yourself. Talk to him/her. They’re there to help. (You’re getting a Building Permit, right?)
Maybe you can furr out the side walls to 5’ and make a great “habitable room” with bookcases, shelving, etc. along the walls. (Bathrooms, etc. is 6’-8” and showers are 6’ minimum height.)