CI in a certified CS building

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Director, Sustainable Buildings and Operations KEMA Mar 02 2010 Guest
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The LEED Rating System Selection Policy states that the

"LEED for Commercial Interiors rating system is appropriate for interior spaces that are undergoing alteration work of at least 60% of the certifying gross floor areaGross floor area (based on ASHRAE definition) is the sum of the floor areas of the spaces within the building, including basements, mezzanine and intermediate‐floored tiers, and penthouses wi th headroom height of 7.5 ft (2.2 meters) or greater. Measurements m ust be taken from the exterior 39 faces of exterior walls OR from the centerline of walls separating buildings, OR (for LEED CI certifying spaces) from the centerline of walls separating spaces. Excludes non‐en closed (or non‐enclosable) roofed‐over areas such as exterior covered walkways, porches, terraces or steps, roof overhangs, and similar features. Excludes air shafts, pipe trenches, and chimneys. Excludes floor area dedicated to the parking and circulation of motor vehicles. ( Note that while excluded features may not be part of the gross floor area, and therefore technically not a part of the LEED project building, they may still be required to be a part of the overall LEED project and subject to MPRs, prerequisites, and credits.).  If the following two statements describe the project, then a New Construction and Major Renovation rating system should be used:

1) the entity conducting the work leases OR owns and controls 90% or more of the building that the space is located in

2) there is new construction or major renovation occurring in 40% or more of the gross floor area of the building."

However, this seems inconsistent and possibly incorrect for a building that has already been certified under CS.  CS and CI were designed to be used in exactly this fashion, and using NC would mean that base buildingThe base building includes elements such as the structure, envelope, and building-level mechanical systems, such as central HVAC, and materials and products installed in the project (e.g., flooring, casework, wall coverings). system are effectively certified twice.  Our project is the interior buildoutThe time at which all habitable buildings on the project are complete and ready for occupancy. of 100% of the floor area of a LEED CS Gold building.

Can anyone shed any light on experiences using 2009 CI on 100% of certified CS building?


Leticia SooHoo, AIA, LEED AP+ Architect,Principal / Sustainability AlfaTech
Mar 03 2010
LEEDuser Member
1029 Thumbs Up

CI in a certified CS building

Andrea, I had a Twitter conversation with Lauren yesterday. LEED geek talk! I went through a similar scenario for a v2.2 project. The building was already CS certified. The tenant would take over the entire building and pursued LEED-CI certification. It was due to the fact that the building already had all the site credits built-out and claimed, and so was the core (all water fixtures were in) and common area HVAC and lighting controls. So I really think your project will be more appropriate for IDC if the site, core+shell are already there. Maybe a conversation with GBCIThe Green Building Certification Institute (GBCI) manages Leadership in Energy and Environmental Design (LEED) building certification and professional accreditation processes. It was established in 2008 with support from the U.S. Green Building Council (USGBC). won't hurt?

Leticia SooHoo, AIA, LEED AP+ Architect,Principal / Sustainability, AlfaTech Mar 10 2010 LEEDuser Member 1029 Thumbs Up

I went through a project just like your scenario and the tenant pursued LEED-CI certification.

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