GSAS Design and Build points estimator

Plan your GSAS rating before design freeze. Pick the level you expect to reach in each category. The tool applies the GSAS category weights, adds up the score and shows the star rating. This is a planning estimate. Your real rating comes from criterion-level assessment in the official GSAS scoring sheet for your typology.

Your estimate

Set a level for each category and press Estimate my rating.

Method and sources

Score = sum of (category weight / 100 x level). This matches the GSAS method at criterion level, where each criterion score is its weight times its level and the project score is the total.

Category	Weight
Urban Connectivity	6%
Site	17%
Energy	24%
Water	16%
Materials	9%
Indoor Environment	19%
Cultural and Economic Value	4%
Management and Operations	5%

Score X	Design and Build rating
X < 0	Certification denied
0.00 to 0.50	1 star
0.50 to 1.00	2 stars
1.00 to 1.50	3 stars
1.50 to 2.00	4 stars
2.00 to 2.50	5 stars
2.50 to 3.00	6 stars

Assumptions. The weights are the aggregated GSAS Design and Build category weights published in the GSAS Technical Guide (Figure 9). Weights for a specific typology (Commercial, Residential, Offices and others) differ by criterion and some criteria do not apply to every typology, so your typology's scoring sheet can give a different result. Using one average level per category is a simplification. Incentive weights and mandatory criteria are not modelled.

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