15-0129 v2.1/Access to sunlight for adjacent site (Part II)


Upon further inspection, we have some additional thoughts. Initially, we thought L5, but it seems it is actually L6. With NO maximum F.A.R. and a 150’ height limit, the equivalent F.A.R. is in the range of FAR 10-12. The city, through their zoning ordinance, clearly wants this zone to be more like an L6 and this is the first project that would actually reach anywhere near that density and height. This is the first time we have had the opportunity to model this out and the team is finding it a better fit to be in the L6 zone. Do you agree that this site is classified as L6?


Thank you for your thoughtful and thorough post. As a result of this Dialogue entry, we have revised the Sunlight parameters to be less stringent for both the maximum allowable shade height on adjacent facades and for shading of the roof of an adjacent building with which the project shares a party wall. The revised section of the Imperative and corresponding footnote should read as follows:

Sunlight: The project may not block sunlight to adjacent building façades[81] and rooftops such that they are shaded above the maximum height allotted in the table below:

Maximum shade height on adjacent façade, measured on Winter Solstice between 10 am - 2 pm (meters):

Transect L2-L3: 6 m
Transect L4: 10 m
Transect L5: 15 m
Transect L6: 20 m
The project may not shade the roof of a development with which it shares a party wall, unless the adjoining development was built to a lesser density than acceptable for the Transect. This corresponds to a neighboring building that is at least two stories in L2-L3; four stories in L4; eight stories in L5; and sixteen stories in L6.

[81]: For projects located in Transects L5 and L6, there is no set maximum shade height on buildings located opposite from the project in an alleyway. (An alley is defined to be less than or equal to 4 meters wide). For Transect L4-L6, refer to the User’s Guide for instruction when there is no other building immediately adjacent to the proposed development.

This information has also been posted to the Living Building Challenge 2.0 Errata Sheet.

Post ID 1985

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