# Area Limitation for Incidental vs Accessory Uses

**URL:** <https://community.blackspectacles.com/t/area-limitation-for-incidental-vs-accessory-uses/2095>\
**Category:** Project Development & Documentation\
**Created:** [October 23, 2020, 11:51am UTC](https://community.blackspectacles.com/t/area-limitation-for-incidental-vs-accessory-uses/2095 "2020-10-23T11:51:58Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![JessicaY](https://yyz1.discourse-cdn.com/flex029/user_avatar/community.blackspectacles.com/jessicay/32/755_2.png) [@JessicaY](https://community.blackspectacles.com/u/JessicaY)\
**Post date:** [October 23, 2020, 11:51am UTC](https://community.blackspectacles.com/t/area-limitation-for-incidental-vs-accessory-uses/2095/1 "2020-10-23T11:51:58Z")

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Can someone help to clarify if the 10% floor area limitation for incidental use spaces is the aggregate value (similar to Accessory uses) or not ? IBC clearly states that 10% of the floor area is the aggregate value of all the accessory use spaces on a floor per 508.2.3. However, it’s not clearly stated for incidental uses.

Thank you

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**Author:** ![monicafitzpatrick](https://blackspectacles.com/uploads/images/1.png) [@monicafitzpatrick](https://community.blackspectacles.com/u/monicafitzpatrick)\
**Post date:** [October 26, 2020, 10:23pm UTC](https://community.blackspectacles.com/t/area-limitation-for-incidental-vs-accessory-uses/2095/2 "2020-10-26T22:23:22Z")

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@coachbryanhadley do you mind helping Jessica with this question?

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**Author:** ![coachbryanhadley\_SME](https://blackspectacles.com/uploads/images/20.png) [@coachbryanhadley\_SME](https://community.blackspectacles.com/u/coachbryanhadley_SME)\
**Post date:** [October 29, 2020, 2:22pm UTC](https://community.blackspectacles.com/t/area-limitation-for-incidental-vs-accessory-uses/2095/3 "2020-10-29T14:22:26Z")

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Hi @JessicaY,

Thanks for your question. Section 509.3 defines the area limitation for incidental uses:

 ![image](https://canada1.discourse-cdn.com/flex029/uploads/blackspectacles/original/1X/e16748388f2cdab4b383f89430ca96c7f0557196.png)

You can read more about incidental uses in Chapter 5 of the 2015 IBC: [https://codes.iccsafe.org/content/IBC2015/chapter-5-general-building-heights-and-areas](https://codes.iccsafe.org/content/IBC2015/chapter-5-general-building-heights-and-areas)  
_(scroll down to section 509)_

Hope it helps,