What are the Tier 1 energy performance requirements?

Grounded in the retrieved California Green Building Standards Code (CALGreen) — click a citation to read the verbatim passage:

• CALGreen § 409.4 High relevance — show source text

  Solar access is the ratio of solar insolation including shade to the
  solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
  3.
  Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|

  A5.601.1 Scope. The measures contained in this appendix are not mandatory unless adopted by local government as specified in Section 101.7. The provisions of this section outline means of achieving enhanced construction or reach levels by incorporating addi

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-41

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  APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

  tional green building measures for newly constructed nonresidential buildings as well as additions and alterations. In order to meet one of the tier levels designers, builders or property owners are required to incorporate additional green building measures necessary to meet the threshold of each level. Refer to the provisions in Section 301.3 for nonresidential additions and alterations scope and application.

  A5.601.2 CALGreen Tier 1

  A5.601.2.1 Prerequisites. To achieve CALGreen tier status, a project must meet all of the mandatory measures in Chapter 5 and, in addition, meet the provisions of this section.

  A5.601.2.2 Energy performance. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

  A5.601.2.3 Tier 1. Comply with the energy efficiency requirements in Section A5.203.1.1 and Section A5.203.1.2.1.

  A5.601.2.4 Voluntary measures for Tier 1. In addition to the provisions of Sections A5.601.2.1 and A5.601.2.3 above, compliance with the following voluntary measures from Appendix A5 is required for Tier 1:

  1. From Division A5.1, a. Comply with the designated parking requirements for high-efficiency vehicles for a minimum of 35 percent of parking capacity per Section A5.106.5.1. b. Electric vehicle (EV) charging [N] and Table A5.106.5.3.1 w/ footnotes. c. Comply with thermal emittance, solar reflectance or SRI values for cool roofs in Section A5.106.11.2 and Table A5.106.11.2.2. [1]

  d. Comply with one elective measure selected from this division. 2. From Division A5.2 comply with ONE of the following:

  1. Outdoor lighting as described in A5.203.1.1.1.

  2. Service water heating in restaurants as described in A5.203.1.1.2.

  3. Warehouse Dock Seal Doors A5.203.1.1.3.

  4. Daylight Design Power Adjustments 5.203.1.1.4.

  5. Exhaust Air Heat Recovery A5.203.1.1.5.

  6. From Division A5.3,

  a. Comply with the 12-percent reduction for indoor potable water use in Section A5.303.2.3.1. b. Comply with one elective measure selected from this division.

  4. From Division A5.4,
• CALGreen § 601.2.4 High relevance — show source text

  A5.601.2.4 Voluntary measures for Tier 1. In addition to the provisions of Sections A5.601.2.1 and A5.601.2.3 above, compliance with the following voluntary measures from Appendix A5 is required for Tier 1:

  1. From Division A5.1, a. Comply with the designated parking requirements for high-efficiency vehicles for a minimum of 35 percent of parking capacity per Section A5.106.5.1. b. Electric vehicle (EV) charging [N] and Table A5.106.5.3.1 w/ footnotes. c. Comply with thermal emittance, solar reflectance or SRI values for cool roofs in Section A5.106.11.2 and Table A5.106.11.2.2. [1]

  d. Comply with one elective measure selected from this division. 2. From Division A5.2 comply with ONE of the following:

  1. Outdoor lighting as described in A5.203.1.1.1.

  2. Service water heating in restaurants as described in A5.203.1.1.2.

  3. Warehouse Dock Seal Doors A5.203.1.1.3.

  4. Daylight Design Power Adjustments 5.203.1.1.4.

  5. Exhaust Air Heat Recovery A5.203.1.1.5.

  6. From Division A5.3,

  a. Comply with the 12-percent reduction for indoor potable water use in Section A5.303.2.3.1. b. Comply with one elective measure selected from this division.

  4. From Division A5.4,

  a. Comply with recycled content of 10 percent of materials based on estimated total cost, or use two products from Table A5.405.4 for at least 75 percent by cost in Section A5.405.4. b. Comply with the 65-percent reduction in construction and demolition waste in Section A5.408.3.1. c. Comply with one elective measure selected from this division.

  5. From Division A5.5,

  a. Comply with resilient flooring systems for 90 percent of resilient flooring in Section A5.504.4.7. b. Comply with thermal insulation meeting 2009 CHPS low-emitting materials list in Section A5.504.4.8. c. Comply with one elective measure selected from this division. 6. Comply with one additional elective measure selected from any division.

  1 Cool roof is required for compliance with Tiers 1 and 2 and may be used to meet energy standards in Part 6, exceed energy standards and to mitigate heat island effect.

  A5.601.3 CALGreen Tier 2.

  A5.601.3.1 Prerequisites. To achieve CALGreen tier status, a project must meet all of the mandatory measures in Chapter 5 and, in addition, meet the provisions of this section.

  A5.601.3.2 Energy performance. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

  A5.601.3.3 Tier 2. Comply with the energy efficiency requirements in Section A5.203.1.1 and Section A5.203.1.2.2.

• CALGreen § 203.2 High relevance — show source text

  SECTION A6.203—PERFORMANCE APPROACH

  A6.203.2 Energy performance. It is the intent of this code to encourage green buildings to achieve exemplary performance in the area of energy efficiency.

  A6.203.2.1 CALGreen Tier 1. [OSHPD 1] To achieve CALGreen [Tier 1, buildings must comply with the latest edition of “Savings By](http://www.energysoft.com/ep/ 2007SBDHProcedures.pdf) Design, Healthcare Modeling Procedures” found online at http://www.energysoft.com/ep/ 2007SBDHProcedures.pdf.

  A6.203.2.2 CALGreen Tier 2. [OSHPD 1] To achieve CALGreen Tier 2, buildings must exceed the latest edition of “Savings By Design, Healthcare Modeling Procedures” by a minimum of 15 percent.

  SECTION A6.204—PRESCRIPTIVE APPROACH

  A6.204.1 ENERGY STAR equipment and appliances. All equipment and appliances provided by the builder shall be ENERGY STAR labeled if ENERGY STAR is applicable to that equipment or appliance.

  A6.204.4 Commissioning. [OSHPD 1 & 4] Building commissioning shall be included in the design and construction processes of the building project to verify that the building’s energy related systems are installed, calibrated and perform according to the owner’s project requirements, basis of design and construction documents.

  The owner and designer shall designate an individual as the Commissioning Authority (CxA) to lead, review and oversee the completion of the commissioning process activities. The owner shall document the Owner’s Project Requirements (OPR). The design team shall develop the Basis of Design (BOD). The CxA shall review these documents for clarity and completeness. The owner and design team shall be responsible for updates to their respective documents, develop and incorporate commissioning requirements into the construction documents and develop and implement a commissioning plan. The CxA shall verify the installation and performance of the systems to be commissioned, verify that training and operation and maintenance documentation have been provided to the owner’s operations staff and complete a commissioning report.

  Commissioning process activities shall be completed for the following energy-related systems, at a minimum:

  1. Heating, ventilating, air conditioning and refrigeration (HVAC&R) systems (mechanical and passive) and associated controls.
  2. Lighting and daylighting controls.
  3. Domestic hot water systems.
  4. Renewable energy systems (wind, solar, etc.).
  5. Building envelope systems.

  A6.204.4.1 Owner’s Project Requirements (OPR). The expectations and requirements of the building shall be documented by the owner and the designer before the design phase of the project begins. This shall be reviewed by the CxA. At a minimum, this documentation shall include the following:

  1. Environmental and sustainability goals.
  2. Energy efficiency goals.
  3. Indoor environmental quality requirements.

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  APPENDIX A6.1 — VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

  4. Equipment and systems expectations.
  5. Building occupant and O&M personnel expectations.
• CALGreen § 405.4 High relevance — show source text

  4. From Division A5.4,

  a. Comply with recycled content of 10 percent of materials based on estimated total cost, or use two products from Table A5.405.4 for at least 75 percent by cost in Section A5.405.4. b. Comply with the 65-percent reduction in construction and demolition waste in Section A5.408.3.1. c. Comply with one elective measure selected from this division.

  5. From Division A5.5,

  a. Comply with resilient flooring systems for 90 percent of resilient flooring in Section A5.504.4.7. b. Comply with thermal insulation meeting 2009 CHPS low-emitting materials list in Section A5.504.4.8. c. Comply with one elective measure selected from this division. 6. Comply with one additional elective measure selected from any division.

  1 Cool roof is required for compliance with Tiers 1 and 2 and may be used to meet energy standards in Part 6, exceed energy standards and to mitigate heat island effect.

  A5.601.3 CALGreen Tier 2.

  A5.601.3.1 Prerequisites. To achieve CALGreen tier status, a project must meet all of the mandatory measures in Chapter 5 and, in addition, meet the provisions of this section.

  A5.601.3.2 Energy performance. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

  A5.601.3.3 Tier 2. Comply with the energy efficiency requirements in Section A5.203.1.1 and Section A5.203.1.2.2.

  A5.601.3.4 Voluntary measures for Tier 2. In addition to the provisions of Sections A5.601.3.1 and A5.601.3.3 above, compliance with the following voluntary measures from Appendix A5 is required for Tier 2:

  1. From Division A5.1, a. Comply with the designated parking requirements for fuel efficient vehicles for a minimum of 50 percent of parking capacity per Section A5.106.5.1. b. Electric vehicle (EV) charging [N] and Table A5.106.5.3.2 with footnotes. c. Comply with thermal emittance, solar reflectance or SRI values for cool roofs in Section A5.106.11.2 and Table A5.106.11.2.3. [1]

  d. Comply with three elective measures selected from this division.

  APPENDIX A5-42 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

  2. From Division A5.2 comply with TWO of the following:

  3. Outdoor lighting as described in A5.203.1.1.1.

  4. Service water heating in restaurants as described in A5.203.1.1.2.

  5. Warehouse Dock Seal Doors A5.203.1.1.3.

  6. Daylight Design Power Adjustments 5.203.1.1.4.

  7. Exhaust Air Heat Recovery A5.203.1.1.5.

  8. From Division A5.3,

• CALGreen § 170.2 High relevance — show source text

  The rated energy capacity shall be not less than the Minimum Rated Useable Energy Capacity determined by Equation 170.2-E, or by Equation 170.2-F if SARA was used to determine the PV capacity in Section 170.2-D, and the rated power capacity shall be not less than the Minimum Power Capacity determined by Equation 170.2-G. In mixed occupancy buildings, the total battery system capacity for the building shall be determined by applying the Minimum Rated Usable Energy Capacity to each of the listed building types and summing the capacities determined for each.

  EQUATION 170.2-E—BATTERY ENERGY STORAGE SYSTEM MINIMUM RATED USABLE ENERGY CAPACITY kWh batt = k((CFA × B)/(1000 × C [0.5] ))

  — EQUATION 170.2-F BATTERY ENERGY STORAGE SYSTEM MINIMUM RATED USABLE ENERGY CAPACITY, SARA-ADJUSTED kWh batt = k((CFA × B)/(1000 × C [0.5] )) × (kWP Vdc,SARA /kWP Vdc )

  268 2025 CALIFORNIA ENERGY CODE

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  MULTIFAMILY BUILDINGS—PERFORMANCE AND PRESCRIPTIVE COMPLIANCE APPROACHES

  where:

  kWh batt = Minimum Rated Usable Energy Capacity of the BESS in kWh.

  kW PVdc = Minimum Rated PV System Capacity in kW from Equation 170.2D. kW PVdc, SARA = Minimum Rated PV System Capacity in kW from the SARA calculation. CFA = Conditioned floor area that is subject to the PV system requirements of Section 170.2(g) in square feet.

  B = BESS Capacity Factor in Wh/square foot as specified in Table 170.2-V for the building type.

  C = Rated single charge-discharge cycle AC to AC (round-trip) efficiency of the BESS.

  EQUATION 170.2-G—BATTERY ENERGY STORAGE SYSTEM MINIMUM RATED POWER CAPACITY

  kW batt = kW batt /4

  where:

  kW batt = Minimum Rated Power Capacity of the BESS in kW dc .

  kWh batt = Minimum Rated Usable Energy Capacity of the BESS in kWh.

  Exception 1 to Section 170.2(h): No BESS is required if the installed PV system capacity is less than 15 percent of the capacity determined by Equation 170.2-D.

  Exception 2 to Section 170.2(h): No BESS is required in buildings with BESS requirements with less than 10 kWh minimum rated usable energy capacity.

  |TABLE 170.

• CALGreen § 409.2 Medium relevance — show source text

  Responsible Designer’s Declaration Statement:

  I attest that the Whole Building Life Cycle Analysis has been performed according to the requirements of Section A5.409.2 and has met the minimum 15 percent (Tier 1) or 20 percent (Tier 2) reduction in global warming potential as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of the California Energy Code currently in effect. Furthermore, I will ensure during construction that the material specifications will be reviewed for substantial conformance with the life cycle assessment indicated on the approved plans so at the close of construction the minimum reduction in global warming potential is thereby secured.

  Signature:	Col2
  Company:	Date:
  Address:	License:
  City/State/Zip:	Phone:

  WORKSHEET (WS-8) [BSC-CG] Section A5.409.3 PRODUCT GWP COMPLIANCE—PRESCRIPTIVE PATH

  Designer’s Declaration Statement:

  I attest that prescriptive compliance has been performed according to the requirements of Section A5.409.3 and products have met the maximum acceptable GWP value for the products listed in Table A5.409.3 for either Tier 1 or Tier 2. Furthermore, I will ensure during construction that any material specification substitution will be reviewed for substantial conformance with the requirements of Section A5.409.3 so at the close of construction the minimum 15 percent reduction in global warming potential is thereby secured.

  Signature:	Col2
  Company:	Date:
  Address:	License:
  City/State/Zip:	Phone:

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  COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

  WORKSHEET (WS-9) Section 5.409.2 and Section A5.409.2 WHOLE BUILDING LIFE CYCLE ASSESSMENT

  User input	Units
  	m2

  Upfront Carbon	Col2	Col3	Use Phase	End of Life	Total
  A1-3	A4	A5	B1-5	C1-4

  Percent Reduction	Col2
  Mandatory
  Tier 1
  Tier 2

  Upfront Carbon	Col2	Col3	Use Phase	End of Life	Total
  A1-3	A4	A5	B1-5	C1-4

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 8-7

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  COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

  Construction Waste Management (CWM) Plan

  Note: This sample form may be used to assist in documenting compliance with the waste management plan.

  Project Name:___________________________________________________

  Job #:__________________________________________________________

• CALGreen § 1-1 Medium relevance — show source text

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A6.1-1

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  APPENDIX A6.1-2 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  A6 VOLUNTARY STANDARDS FOR HEALTH FACILITIES [OSHPD 1, 2 & 4]

  DIVISION A6.1 – SITE PLANNING AND DESIGN

  SECTION A6.106—SITE DEVELOPMENT

  A6.106.9 Building orientation. Locate and orient the building as follows:

  1. When site and location permit, orient the building with the long sides facing north and south.
  2. Protect the building from thermal loss, drafts and degradation of the building envelope caused by wind and wind-driven materials such as dust, sand, snow and leaves, with building orientation and landscape features. Note: For information on sun angles and shading, visit: http://www2.aud.ucla.edu/energy-design-tools/.

  Calculations may be made using the Solar-2 tool.

  DIVISION A6.2 – ENERGY EFFICIENCY

  SECTION A6.202—DEFINITIONS

  A6.202.1 Definitions. The following words and terms shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein.

  ENERGY STAR. A joint program of the US Environmental Protection Agency and the US Department of Energy. ENERGY STAR is a voluntary program designed to identify and promote energy-efficient products and practices.

  SECTION A6.203—PERFORMANCE APPROACH

  A6.203.2 Energy performance. It is the intent of this code to encourage green buildings to achieve exemplary performance in the area of energy efficiency.

  A6.203.2.1 CALGreen Tier 1. [OSHPD 1] To achieve CALGreen [Tier 1, buildings must comply with the latest edition of “Savings By](http://www.energysoft.com/ep/ 2007SBDHProcedures.pdf) Design, Healthcare Modeling Procedures” found online at http://www.energysoft.com/ep/ 2007SBDHProcedures.pdf.

  A6.203.2.2 CALGreen Tier 2. [OSHPD 1] To achieve CALGreen Tier 2, buildings must exceed the latest edition of “Savings By Design, Healthcare Modeling Procedures” by a minimum of 15 percent.

  SECTION A6.204—PRESCRIPTIVE APPROACH

  A6.204.1 ENERGY STAR equipment and appliances. All equipment and appliances provided by the builder shall be ENERGY STAR labeled if ENERGY STAR is applicable to that equipment or appliance.

  A6.204.4 Commissioning. [OSHPD 1 & 4] Building commissioning shall be included in the design and construction processes of the building project to verify that the building’s energy related systems are installed, calibrated and perform according to the owner’s project requirements, basis of design and construction documents.

  The owner and designer shall designate an individual as the Commissioning Authority (CxA) to lead, review and oversee the completion of the commissioning process activities. The owner shall document the Owner’s Project Requirements (OPR).

• CALGreen § 409.4 Medium relevance — show source text

  Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
  3.
  Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|1.
  Exception: Allowance may be permitted in Tier 2 for up to 5-percent specialty purpose flooring.
  2.
  Solar water-heating system requirement for newly constructed restaurants as per A5.203.1.1.2.
  Exceptions:
  a. Buildings with a natural gas service water heater with a minimum of 95-percent thermal efficiency.
  b. Buildings where greater than 75 percent of the total roof area has annual solar access that is less than 70 percent. Solar access is the ratio of solar insolation including shade to the
  solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
  3.
  Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|1.
  Exception: Allowance may be permitted in Tier 2 for up to 5-percent specialty purpose flooring.
  2.
  Solar water-heating system requirement for newly constructed restaurants as per A5.203.1.1.2.
  Exceptions:
  a. Buildings with a natural gas service water heater with a minimum of 95-percent thermal efficiency.
  b. Buildings where greater than 75 percent of the total roof area has annual solar access that is less than 70 percent. Solar access is the ratio of solar insolation including shade to the
  solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access.
  3.
  Life cycle assessment compliant with Section A5.409.4 in this code may be substituted for prescriptive measures from Division A5.4.|

  A5.601.1 Scope. The measures contained in this appendix are not mandatory unless adopted by local government as specified in Section 101.7. The provisions of this section outline means of achieving enhanced construction or reach levels by incorporating addi

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-41

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  APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

  tional green building measures for newly constructed nonresidential buildings as well as additions and alterations. In order to meet one of the tier levels designers, builders or property owners are required to incorporate additional green building measures necessary to meet the threshold of each level. Refer to the provisions in Section 301.3 for nonresidential additions and alterations scope and application.

  A5.601.2 CALGreen Tier 1

  A5.601.2.1 Prerequisites. To achieve CALGreen tier status, a project must meet all of the mandatory measures in Chapter 5 and, in addition, meet the provisions of this section.

  A5.601.2.2 Energy performance. For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

• CALGreen § 602.1 Medium relevance — show source text

  VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A5-3

  A5.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A5-3 A5.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . APPENDIX A5-13 A5.3 Water Efficiency and Conservation . . . APPENDIX A5-19 A5.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-25 A5.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A5-35 A5.6 Voluntary Tiers . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-41 A5.601 CALGren Tier 1 and Tier 2. . . . . . . . . . APPENDIX A5-41

  A5.602 CALGreen Verification Guidelines Mandatory Measures Checklist . . . . . . . . . . . . . . . APPENDIX A5-44

  A5.602.1 CALGreen Verification Guidelines

  Tier 1 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-48

  A5.602.2 CALGreen Verification Guidelines

  Tier 2 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-55

  APPENDIX A6 VOLUNTARY STANDARDS FOR HEALTH

  FACILITIES [OSHPD 1, 2 & 4] . . . . . . . . . . . APPENDIX A6.1-3 A6.1 Site Planning and Design . . . . . . . . . . . APPENDIX A6.1-3 A6.2 Energy Efficiency . . . . . . . . . . . . . . . . . . APPENDIX A6.1-3 A6.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . APPENDIX A6.1-32 A6.5 Environmental Quality . . . . . . . . . . . . APPENDIX A6.1-33

  INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INDEX-1

  HISTORY NOTE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HIST-1

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  viii 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

  CHAPTER 1 – ADMINISTRATION

  (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

  |Adopting

• CALGreen § 8-40 Medium relevance — show source text

  . . . . . . . . . . . . . 8-40

  APPENDIX A4 RESIDENTIAL

  VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A4-3

  A4.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A4-3 A4.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . . APPENDIX A4-9 A4.3 Water Efficiency and Conservation . . . APPENDIX A4-13 A4.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A4-15 A4.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A4-19 A4.6 Tier 1 and Tier 2 . . . . . . . . . . . . . . . . . . . . APPENDIX A4-21

  Division A4.6—Residential Occupancies Application Checklist . . . . . . . . . . . . . APPENDIX A4-23 A4.7 Residential Model Ordinance . . . . . . . . . APPENDIX A4-31

  APPENDIX A5 NONRESIDENTIAL

  VOLUNTARY MEASURES. . . . . . . . . . . . . . . . . APPENDIX A5-3

  A5.1 Planning and Design . . . . . . . . . . . . . . . . . APPENDIX A5-3 A5.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . APPENDIX A5-13 A5.3 Water Efficiency and Conservation . . . APPENDIX A5-19 A5.4 Material Conservation and Resource Efficiency . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-25 A5.5 Environmental Quality . . . . . . . . . . . . . . APPENDIX A5-35 A5.6 Voluntary Tiers . . . . . . . . . . . . . . . . . . . . . APPENDIX A5-41 A5.601 CALGren Tier 1 and Tier 2. . . . . . . . . . APPENDIX A5-41

  A5.602 CALGreen Verification Guidelines Mandatory Measures Checklist . . . . . . . . . . . . . . . APPENDIX A5-44

  A5.602.1 CALGreen Verification Guidelines

  Tier 1 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-48

  A5.602.2 CALGreen Verification Guidelines

  Tier 2 Checklist . . . . . . . . . . . . . . . . . APPENDIX A5-55

  APPENDIX A6 VOLUNTARY STANDARDS FOR HEALTH

• CALGreen § 304.1 Medium relevance — show source text

  SECTION 304—VOLUNTARY TIERS

  304.1 Purpose. Voluntary tiers are intended to further encourage building practices that improve public health, safety and general welfare by promoting the use of building concepts which minimize the building’s impact on the environment and promote a more sustainable design.

  304.1.1 Tiers. The provisions of Divisions A4.6 and A5.6 outline means, in the form of voluntary tiers, for achieving enhanced construction levels by incorporating additional measures for residential and nonresidential new construction. Voluntary tiers may be adopted by local governments and, when adopted, enforced by local enforcing agencies. Buildings complying with tiers specified for each occupancy contain additional prerequisite and elective green building measures necessary to meet the threshold of each tier. See Section 101.7 of this code for procedures and requirements related to local amendments, additions or deletions, including changes to energy standards.

  [BSC & HCD] Where there are practical difficulties involved in complying with the threshold levels of a tier, the enforcing agency may grant modifications for individual cases. The enforcing agency shall first find that a special individual reason makes the strict letter of the tier impractical and that modification is in conformance with the intent and purpose of the measure. The details of any action granting modification shall be recorded and entered in the files of the enforcing agency.

  SECTION 305 [OSHPD 1]— CALGreen TIER 1 AND CALGreen TIER 2

  305.1 CALGreen Tier 1 and CALGreen Tier 2 buildings contain voluntary green building measures necessary to meet the threshold of each level.

  305.1.1 CALGreen Tier 1. To achieve CALGreen Tier 1, buildings must comply with the latest edition of “Savings By Design, Healthcare Modeling Procedures” found online at http://www.energysoft.com/main/page_ downloads_ sbd_healthcare.html.

  305.1.2 CALGreen Tier 2. To achieve CALGreen Tier 2, buildings must exceed the latest edition of “Savings By Design, Healthcare Modeling Procedures” by a minimum of 15 percent.

  SECTION 306 [DSA-SS]—VOLUNTARY MEASURES

  306.1 Purpose. For public schools and community colleges, voluntary measures further encourage building practices that improve public health, safety and general welfare by promoting the use of building concepts which minimize the building’s impact on the environment and promote a more sustainable design.

  306.1.1 Appendix A5, Divisions A5.1 through A5.5, outline means of achieving enhanced sustainable design and construction by incorporating voluntary measures that exceed the mandatory measures.

  306.1.2 Chapter 5 Nonresidential Mandatory Measures that are not adopted as mandatory measures by DSA-SS are voluntary measures recommended and encouraged for the design, construction, verification and maintenance of non-energy systems.

  Note: The building commissioning requirements for energy efficiency specified in the California Energy Code are required.

  3-4 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

  CHAPTER 4 – RESIDENTIAL MANDATORY MEASURES

  (Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

• CALGreen § 602.1 Medium relevance — show source text

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-39

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  APPENDIX A5-40 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  A5 NONRESIDENTIAL VOLUNTARY MEASURES

  DIVISION A5.6 – VOLUNTARY TIERS

  SECTION A5.601—CALGreen TIER 1 AND TIER 2	Col2	Col3	Col4
  TABLE A5.601 NONRESIDENTIAL BUILDINGS: Green Building Standards Code Proposed Performance Approach Note: This table is intended only as an aid in illustrating the nonresidential tier structure (Refer to Checklists A5.602, A5.602.1 and A5.602.2 for CALGreen verification guidelines for Mandatory Checklist, Tier 1 Checklist and Tier 2 Checklist.)	TABLE A5.601 NONRESIDENTIAL BUILDINGS: Green Building Standards Code Proposed Performance Approach Note: This table is intended only as an aid in illustrating the nonresidential tier structure (Refer to Checklists A5.602, A5.602.1 and A5.602.2 for CALGreen verification guidelines for Mandatory Checklist, Tier 1 Checklist and Tier 2 Checklist.)	TABLE A5.601 NONRESIDENTIAL BUILDINGS: Green Building Standards Code Proposed Performance Approach Note: This table is intended only as an aid in illustrating the nonresidential tier structure (Refer to Checklists A5.602, A5.602.1 and A5.602.2 for CALGreen verification guidelines for Mandatory Checklist, Tier 1 Checklist and Tier 2 Checklist.)	TABLE A5.601 NONRESIDENTIAL BUILDINGS: Green Building Standards Code Proposed Performance Approach Note: This table is intended only as an aid in illustrating the nonresidential tier structure (Refer to Checklists A5.602, A5.602.1 and A5.602.2 for CALGreen verification guidelines for Mandatory Checklist, Tier 1 Checklist and Tier 2 Checklist.)
  CATEGORY	ENVIRONMENTAL PERFORMANCE GOAL	TIER 1	TIER 2
  All	Minimum Mandatory (See Mandatory Checklist)	Meet all of the provisions of Chapter 5 (See Tier 1 Checklist)	Meet all of the provisions of Chapter 5 (See Tier 2 Checklist)
  DIVISION 5.1 Planning and Design	Reuse of existing building	See Section A5.105.1 and Section A5.105.2 requirements	See Section A5.105.1 and Section A5.105.2 requirements
  DIVISION 5.1 Planning and Design	Designated Parking for Fuel Efficient Vehicles (Tier 1 and Tier 2 only)	Approx. 35% of total spaces	Approx. 50% of total spaces
  DIVISION 5.1 Planning and Design	Electric Vehicle Charging	Approx. 30% of total spaces	Approx. 45% of total spaces
  **DIVISION 5.

• CALGreen § 106.9 Medium relevance — show source text

  FEATURE OR MEASURE	COMPLIANCE LEVELS	Col3	Col4	NOTES
  FEATURE OR MEASURE	Mandatory CALGreen	VOLUNTARY CALGreen	VOLUNTARY CALGreen	VOLUNTARY CALGreen
  FEATURE OR MEASURE	Mandatory CALGreen	Tier 1	Tier 2	Tier 2
  DIVISION A6.1 – PLANNING AND DESIGN
  SECTION Site Development	SECTION Site Development	SECTION Site Development	SECTION Site Development	SECTION Site Development
  **A6.106.9 Building orientation.**Locate and orient the building as follows: 1. When site and location permit, orient the building with the long sides facing north and south. 2. Protect the building from thermal loss, drafts and degradation of the building envelope caused by wind and wind-driven materials such as dust.			
  DIVISION A6.2 – ENERGY EFFICIENCY
  SECTION A6.203 Performance Measures	SECTION A6.203 Performance Measures	SECTION A6.203 Performance Measures	SECTION A6.203 Performance Measures	SECTION A6.203 Performance Measures
  A6.203.1 Energy performance. [OSHPD 1] **A6.203.1.1 CALGreen Tier 1. [OSHPD 1]**Buildings must comply with the latest edition of “Savings By Design, Healthcare Modeling Procedures.” A.5.203.1.2 CALGreen Tier 2. [OSHPD 1] Buildings must exceed the latest edition of “Savings By Design, Healthcare Modeling Procedures” by 15 percent.			
  SECTION A6.204 Prescriptive Measures
  **A6.204.1 ENERGY STAR equipment and appliances.**All equipment and appliances provided by the builder shall be ENERGY STAR labeled if ENERGY STAR is applicable to that equipment or appliance.			
  A6.204.4 Commissioning. Building commissioning for all building systems covered by T24, Part 6, process systems and renewable energy systems shall be included in the design and construction processes of the building project. Commissioning requirements shall include as a minimum items listed in Section A6.204.4. **A6.204.4.1 Owner’s Project Requirements (OPR).**Documented before the design phase of the project begins the OPR shall include items listed in Section A6.204.4. **A6.204.4.2 Basis of Design (BOD).**A written explanation of how the design of the building systems meets the OPR shall be completed at the design phase of the building project and updated periodically to cover the systems listed in Section A6.204.4.2. **A6.204.4.3 Commissioning plan.

• CALGreen § 602.1 High relevance — show source text

  )_|TABLE A5.601 NONRESIDENTIAL BUILDINGS: Green Building Standards Code Proposed Performance Approach
  Note: This table is intended only as an aid in illustrating the nonresidential tier structure (Refer to Checklists A5.602, A5.602.1 and A5.602.2 for
  CALGreen verification guidelines for Mandatory Checklist, Tier 1 Checklist and Tier 2 Checklist.)| |CATEGORY|ENVIRONMENTAL
  PERFORMANCE GOAL|TIER 1|TIER 2| |All|Minimum Mandatory
  (See Mandatory Checklist)|Meet all of the provisions
  of Chapter 5 (See Tier 1 Checklist)|Meet all of the provisions
  of Chapter 5 (See Tier 2 Checklist)| |DIVISION 5.1
  Planning and Design|Reuse of existing building|See Section A5.105.1 and Section
  A5.105.2 requirements|See Section A5.105.1 and Section
  A5.105.2 requirements| |DIVISION 5.1
  Planning and Design|Designated Parking for
  Fuel Efficient Vehicles
  (Tier 1 and Tier 2 only)|Approx. 35% of total spaces|Approx. 50% of total spaces| |DIVISION 5.1
  Planning and Design|Electric Vehicle Charging|Approx. 30% of total spaces|Approx. 45% of total spaces| |DIVISION 5.1
  Planning and Design|Cool Roof to Reduce
  Heat Island Effect|Roof Slope < 2:12 SRI 75
  Roof Slope > 2:12 SRI 16|Roof Slope < 2:12 SRI 82
  Roof Slope > 2:12 SRI 27| |DIVISION 5.1
  Planning and Design||1 additional Elective from Division A5.1|3 additional Electives from Division A5.1| |DIVISION 5.2
  Energy Efficiency|Energy Performance2a, 2b|Outdoor lighting power 90%
  of Part 6 allowance|Outdoor lighting power 90%
  of Part 6 allowance| |||If applicable, solar water-heating system
  with minimum solar savings fraction of 0.15|If applicable, solar water-heating system
  with minimum solar savings fraction of 0.15| |||Warehouse door seals|Warehouse door seals| |||Comply with day lighting requirements|Comply with day lighting requirements| |||Exhaust heat recovery|Exhaust heat recovery| |||Energy Budget 95% or 90%
  of Part 6 calculated value of allowance|Energy Budget 90% or 85%
  of Part 6 calculated value of allowance| |DIVISION 5.3
  Water Efficiency
  and Conservation|Indoor Water Use|12% Savings|20% Savings| |DIVISION 5.3
  Water Efficiency
  and Conservation||1 additional Elective from Division A5.3|3 additional Electives from Division A5.3| |DIVISION 5.4
  Material Conservation
  and Resource Efficiency3|Construction Waste Reduction|At least 65% reduction|At least 80% reduction| |**DIVISION 5.

• CALGreen § 62.1. Medium relevance — show source text

  3. Of Class 4 as defined in ASHRAE Standard 62.1.

  4. Systems expected to operate less than 20 hours per week.

  A5.203.1.2 Performance standard. Comply with one of the advanced efficiency levels indicated below.

  A5.203.1.2.1 Tier 1. Buildings complying with the first level of advanced energy efficiency shall have an Energy Budget that is no greater than indicated below, depending on building type and the type of energy systems included in the building project. If the newly constructed building or addition does not include indoor lighting or mechanical systems, then no additional performance requirements above Title 24, Part 6 are required.

  1. For nonresidential building projects that include indoor lighting or mechanical systems, but not both: No greater than 95 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.
  2. For nonresidential building projects that include indoor lighting and mechanical systems: No greater than 90 percent of the Title 24, Part 6 Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.

  APPENDIX A5-14 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

  3. For high-rise residential and hotel/motel building projects: No greater than 95 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.

  A5.203.1.2.2 Tier 2. Buildings complying with the second level of advanced energy efficiency shall have an Energy Budget that is no greater than indicated below, depending on building type and the type of energy systems included in the building project. If the newly constructed building or addition does not include indoor lighting or mechanical systems, then no additional performance requirements above Title 24, Part 6 are required.

  1. For nonresidential building projects that include indoor lighting or mechanical systems, but not both: No greater than 90 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.
  2. For nonresidential building projects that include indoor lighting and mechanical systems: No greater than 85 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.
  3. For high-rise residential and hotel/motel building projects: No greater than 95 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.

  Note: For Energy Budget calculations, high-rise residential and hotel/motel buildings are considered nonresidential buildings.

  SECTION A5.204—MANDATORY REQUIREMENTS FOR ALTERATIONS TO EXISTING BUILDINGS

  A5.204.1 Energy efficiency . Alterations to existing nonresidential buildings shall comply with Section A5.204.1.1.

  A5.204.1.1 Altered pool and/or spa heating for existing nonresidential buildings . Alteration of existing nonresidential pool and/or spa heating system shall meet the following.

  Heating source sizing. Heating systems or equipment for pools or spas shall meet one of the sizing requirements of Items 1 through 5 below: 1.

• CALGreen § 203.1.1.3 Medium relevance — show source text

  A5.203.1.1.3 Warehouse dock seal doors. Exterior loading dock doors that are adjacent to conditioned or indirectly conditioned spaces shall have dock seals or dock shelters installed at the time of permitting. This requirement shall apply to newly constructed buildings and to loading dock doors added to existing buildings.

  A5.203.1.1.4 Daylight Design Power Adjustments Factors (PAFs). Daylighting devices shall be installed as specified in Title 24, Part 6, Section 140.3(d).

  A5.203.1.1.5 Exhaust air heat recovery. Heat recovery requirements based on ASHRAE 90.1, Section 6.5.6.1 are adapted and modified for California climate zones as described below.

  1. Systems with minimum design outdoor air fraction of 80 percent or greater and supply air flow of 200 cfm or greater in climate zones 2, 9, 10, 11, 12, 13, 14, 15 shall have a heat recovery system.
  2. Heat recovery systems required by this section shall result in a net sensible energy recovery ratio of at least 60 percent for both heating and cooling as tested using AHRI 1060-2014 or 1061-2014 and certified by AHRI. A 60 percent sensible energy recovery ratio shall mean a change in the dry-bulb of the outdoor air supply equal to 60 percent of the difference between the outdoor air and exhaust air dry-bulb at design conditions. Provisions shall be made to bypass or control the energy recovery system to permit air economizer operation as required by Title 24, Part 6, Section 140.4(e), Economizers.

  Exceptions:

  1. Systems serving spaces that are not cooled and that are heated to less than 60°F.

  2. Where more than 60 percent of the outdoor air heating energy is provided from site-recovered energy.

  3. Where the sum of the airflow rates exhausted and relieved within 20 feet of each other is less than 75 percent of the design outdoor airflow rate, excluding exhaust air that is:

  4. Used for another energy recovery system;

  5. Not allowed by ASHRAE Standard 170 for use in energy recovery systems with leakage potential; or

  6. Of Class 4 as defined in ASHRAE Standard 62.1.

  7. Systems expected to operate less than 20 hours per week.

  A5.203.1.2 Performance standard. Comply with one of the advanced efficiency levels indicated below.

  A5.203.1.2.1 Tier 1. Buildings complying with the first level of advanced energy efficiency shall have an Energy Budget that is no greater than indicated below, depending on building type and the type of energy systems included in the building project. If the newly constructed building or addition does not include indoor lighting or mechanical systems, then no additional performance requirements above Title 24, Part 6 are required.

  1. For nonresidential building projects that include indoor lighting or mechanical systems, but not both: No greater than 95 percent of the Title 24, Part 6, Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.
  2. For nonresidential building projects that include indoor lighting and mechanical systems: No greater than 90 percent of the Title 24, Part 6 Energy Budget for the Standard Design Building as calculated by compliance software certified by the Energy Commission.

  APPENDIX A5-14 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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