Building rotation around the compass

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Hi, eQuest Masters- this is my week for easy questions (I think):

I know that a new stand-alone building gets the 4-point rotation.

I know that an existing building project does not.

However, what is the protocol when one has an all new addition to an
existing building. The new addition under consideration doubles the floor
area and is registered for LEED certification?

Rotate or not? My guess is not.


Jeff Ross-Bain, PE, LEED AP BD+C, BEMP

Build Green. Save Time

Jeff Ross-Bain3's picture
Joined: 2011-09-30
Reputation: 0

Hi Jeff,

My loose understanding is the line of "rotations or not" is drawn by whether it's considered by LEED a "major renovation."

* 100% new construction - do the rotations

* 100% existing renovation - no rotations

* Combination of new construction and existing renovation - do the rotations if the new construction (by footprint) exceeds the existing building areas (>50% new construction). For that case, the building orientation is considered an existing condition. Note these building areas are tallied under other credit templates, so if the figures are close be sure to coordinate your interpretation and figures on this point with others on your LEED team.

That's the impression I've received between reviewers for a few projects anyway - I'm not certain whether this rule is actually in writing somewhere to cite. Perhaps someone else can chime in and inform/correct me on this?

For future reference, queries not specific to eQuest like this might reach more folks with answers to contribute via the [bldg.-sim] mailing list ;).

Best regards,

[cid:489575314 at 22072009-0ABB]


Nick-Caton's picture
Joined: 2011-09-30
Reputation: 605

Nick, Jeff,

I remember this issue coming up when I had lunch with Charles Eley a few months ago, but I
don't dare repeat what I remembered Charles' saying, because my memory is not that good.
Therefore, I'm forwarding this to Charles in hopes that he can chime in himself!


Joe Huang's picture
Joined: 2011-09-30
Reputation: 206

Rotation rules were relaxed in 90.1 2010 (see below). Since 90.1 2010 = 90.1
2007 + addenda, and given that LEED allows use of addenda, you may not have
to do rotations as long as you can justify that the orientation in your case
was dictated by site considerations, find the addendum where the change was
introduced, and reference it in your submittal. On the other hand, rotating
in eQUEST is so easy that it may take you less time to do that than to
justify exception to the reviewer.

Good luck,


Maria Karpman's picture
Joined: 2011-09-30
Reputation: 0