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855773520-LEED-v5-ID-C-Reference-Guide-Launch-Edition-1 - Page 176

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PATH 4. BASE BUILDING ENERGY EFFICIENCY (2 POINTS)

Locate in a base building that complies with one of the following:

  • ASHRAE 90.1-2022

  • Current ENERGY STAR® score of at least 75

  • LEED base building documentation of energy efficiency per Table 5

Table 5. LEED base building documentation of energy efficiency

Interior fit-out
classification		LEED Base Building Documentation of Energy EfficiencyCol3Col4
Interior fit-out
classification

Rating
system(s)

EA credit name and credit
option

Base building
minimum threshold
Initial build-out

LEED v5
BD+C


EAc3: Enhanced Energy
Efficiency

5 points
Alterations of
previously
occupied space

LEED v5
O+M

EAc2: Optimized Energy
Performance
5 points

Initial build-out
LEED v4 or
LEED v4.1
BD+C		EAc2: Optimized Energy
Performance		8 points

OR

Option 2. Energy Simulation (1–12 points)

Demonstrate an improvement in future source energy calculated per ASHRAE Standard 90.1, Normative Appendix G, “Performance Rating Method,” with the following additional provisions:

  • Use the ASHRAE 90.1 version applied for EAp2: Minimum Energy Efficiency .

  • Replace ASHRAE 90.1-2019 or 90.1-2022, Table 4.2.1.1, BPFs , with Table 7 below. For alterations except initial build-out construction, the following ASHRAE 90.1-2022 adjustments may be applied:

o Substantial alteration . Multiply the BPF by 1.05 if the alteration is defined as a

substantial alteration in ASHRAE 90.1-2022, Section G3.1.4(a).

o Other alterations . Apply ASHRAE 90.1-2022, Section G3.3 (“Performance

Calculations for Other Alterations”). For projects documented using ASHRAE 90.1-2019, Appendix G, replace all references to 90.1-2022, Section 5–10, prescriptive criteria with the corresponding 90.1-2019, Section 5–10 criteria.

  • Replace all references to “cost” with “future source energy.” Use an electric site-tosource energy conversion factor of 2.0 based on future projections for the U.S. A lower national average value may be used as applicable for projects outside of the U.S.

  • Model energy efficiency measures for plug and process loads using Section G2.5, “Exceptional Calculation Method,” or approved calculations in the LEED reference

U.S. Green Building Council LEED v5 Reference Guide for Interior Design and Construction, April 2025 Launch Edition 165

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