5% window light rule in basement

Question Icon
Posted by: from Barrie
7/26/2016 at 7:56:45 PM

I've built a bachelor apt in my basement with a bathroom, kitchen and a living space/bedroom which is 195sq. I'm working on getting a egress window installed that's no problem however the rule of 5% light from the glass requirement is impossible for me to meet. I don't have the room for 10sqft of window.

Is there anything I'm missing here? The room is combined bed/living space. I want to do it right, however I'm in a jam.

User Icon
Date/Time7/26/2016 at 10:41:09 PM

Hi there,

Egress window can't be less then 3.9 sq.ft. and no less then 18" in any direction, on top you need 5 sq.ft. of day light in your living room.

User Icon
Colin in Barrie
Date/Time7/27/2016 at 12:02:33 AM

So you take the sq ft of the living room say 200sq and 5% of that is 10sq ft or say 70 inches of glass area. Is this correct ?


User Icon
Colin in Barrie
Date/Time7/27/2016 at 12:04:07 AM

Thanks Steve,

However how did you get 5sq ft? This would be good.

Search the TrustedPros directory and discover the best contractors in your area.

Find your home service pro
Great renovations start with a great contractor.

Since 2004, TrustedPros has been helping homeowners find the right contractor for their home improvements and repairs.

Post Your Project

Within hours you'll be comparing offers from top-rated professionals. It's free to post and you're under no obligation to hire.

Trustedpros Inc. does not warrant the accuracy, completeness, safety, legality or usefulness of any Content, or Whether Content is Current and up-to-date, and TrustedPros Inc. Shall have no liability whatsoever with respect to your use or reliance upon any content or for content being removed or otherwise ceasing to be available. Please refer to the terms and conditions of use of this websites for more details.

Get Free Estimates

Post your project and compare offers from top-rated pros.