Section 2: Individual LEED Credit Reviews
LEED Credit ID-1.4A:
Use tree plantings to provide shade for
additional on-site impervious paving areas.
Exceed Heat Island Effect,
Basis for Cost Assumption
Non-Roof
This innovation credit is only pursued in the
Courthouse model--the scope of the Office
Intent (for all Innovation in Design Credits)
Building modernization does not include site work.
For the Courthouse model, a cost premium is
To provide design teams and projects the
defined through two changes to the site paving
opportunity to be awarded points for exceptional
materials:
performance above and beyond the
requirements set by the LEED Green Building
White Portland cement concrete is used
Rating System and/or innovative performance in
instead of standard gray concrete for
Green Building categories not specifically
sidewalks and other pathways.
addressed by the LEED Green Building Rating
Light-colored granite pavers (white, pink and
System.
light grey tones) are used instead of medium-
to-dark grey granite pavers. The premium
Requirement
defined for the light-colored pavers is
In writing, identify the intent of the proposed
primarily for additional transportation costs.
innovation credit, the proposed requirement for
compliance, the proposed submittals to
Summary of First Cost Impacts
demonstrate compliance, and the design
approach (strategies) that might be used to meet
the requirements.
Courthouse (New Construction, 262,000 GSF)
(1 point)
Total Credit Cost...................................... 5,337
Cost Impact ($/GSF) ..........................
||content||
.90/GSFCost Impact = 5
Cost Impact (%) ............................................ 0.41%
Office Building (Modernization, 306,600 GSF)
1
2
3
4
5
The credit is not applicable.
GSA
No
Low
Moderate
High
Standard
premium,
premium
premium
premium
(no cost)
psble svgs
(<50K)
(50-150K)
(>150K)
Additional Considerations
Practical Applications
None identified.
A LEED innovation and design credit can
Synergistic Credits
potentially be earned for exceeding the
requirements of credit SS-7.1 (Heat Island Effect,
None identified (with construction cost impacts).
Non-Roof). The proposed strategies for exceeding
the credit requirement include the following:
Supporting Calculations
Provide 100 percent of the building parking
underground.
Use light-colored paving materials (with an
average albedo of 0.3 or higher) for over 75
percent of the on-site impervious paving
areas.
GSA LEED COST STUDY
161
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