Page 176 - Green Building Through Integrated Design

152 INTEGRATED PROJECT MANAGEMENT—COST/BENEFIT ANALYSIS OF GREEN BUILDINGS

Figure 8.3 Cumulative cash flow WE Credit 1: Water Efficient
Landscaping. Paul Shahriari, GreenMind Inc.

WATER EFFICIENCY: CREDIT 3—WATER USE REDUCTION

Let’s look at another water-related situation. In this case, we want to reduce water
consumption in the building, a key issue identified in our visioning session, not only
to save operating costs but also to create environmental benefit and to reduce the
impact of development on urban infrastructure. Our options include specifying

TABLE 8.4 WATER EFFICIENCY: CREDIT 1 WATER-EFFICIENT LANDSCAPING

LEED CREDIT SOLUTION LEED CREDIT
#1 NATIVE/DROUGHT SOLUTION #2
TOLERANT PLANTS & RAINWATER CISTERN
NON-LEED NO PERMANENT & GRAYWATER
BUILDING IRRIGATION SYSTEM
Soft Cost None None Additional MEP
Impact engineering $5000
Hard Cost None 1. Decrease in land- 1. Rainwater
Impacts scape material costs cistern $50,000
$20,000 2. Graywater
2. Elimination of permanent system $30,000
irrigation system $25,000
Life-Cycle None 1. Water cost reduction Water cost
Benefits $15,000/year reduction
2. Irrigation system $15,000/year
maintenance cost
reduction $5000/year