- Which Outline Is the Real One? Version 2.0 vs. the Legacy Outline
- How the 111 Questions Are Delivered
- Reading the Published Percentage Ranges
- Domains 1-5: Foundations, Definitions, and Governance
- Domains 6-8: Climate, Policy Analysis, and Corporate Programs
- Domains 9-10: Buildings, Design, and Procurement
- Domains 11-14: Energy, Transportation, and Water
- Domains 15-16: Costing and Sustainability Plans
- Original Practice Questions to Test Your Reading
- A Domain-Driven Study Sequence
- Fees, Eligibility, and Renewal
- Frequently Asked Questions
- The current CSDP exam scope is AEE's Body of Knowledge Version 2.0, effective June 1, 2025, with 16 exam sections.
- Developing & Implementing Sustainability Plans carries the highest published range (7%-11%), followed by Sustainable Buildings (6%-10%).
- The exam has 111 graded multiple-choice questions in four hours, open-book and open-notes, with printed references only.
- Older 15-section, 2017 outlines still circulate online; their headings and weights are superseded.
Which Outline Is the Real One? Version 2.0 vs. the Legacy Outline
Before you study a single page, settle which outline you are studying from. The Certified Sustainable Development Professional (CSDP) credential, issued by the Association of Energy Engineers (AEE), is built on the CSDP Body of Knowledge & Study Guide, Version 2.0, which took effect June 1, 2025 after approval on May 15, 2025. It superseded Version 1.0, an older outline organized into 15 sections.
That distinction matters because AEE's own resource pages still link the older document alongside the current one, and several third-party prep sites continue to teach from the legacy topic list. If a course or flashcard deck is organized around 15 sections or quotes weights from the 2017 outline, treat it with caution. The 16 domains in this guide come from Version 2.0, and the detailed examination blueprint is supplied by the CSDP Certification Scheme 1.0.
How the 111 Questions Are Delivered
The examination consists of 111 graded multiple-choice questions taken over four hours. It is open-book and open-notes, but with a firm boundary: printed textbooks and bound notes are permitted, while digital reference access is prohibited. Stand-alone scientific, financial, or graphing calculators are allowed as long as they have no internet or Bluetooth capability.
You can test in person or through live remote proctoring delivered via ProctorU/Meazure Learning. Remote candidates need a compatible computer, webcam, microphone, and the Guardian Browser. Standard proctoring is included in the application fee; premium short-notice scheduling costs extra. One practical detail that catches people off guard: bathroom breaks do not stop the exam clock.
Open-book does not mean easy. With roughly two minutes per question on average, you cannot afford to hunt through an unfamiliar textbook for every item. The candidates who benefit from open-book rules are those who have tabbed and organized their printed references by domain so that lookups take seconds. For more on how the format shapes difficulty, read How Hard Is the CSDP Exam? Complete Difficulty Guide 2026.
Reading the Published Percentage Ranges
AEE publishes each domain as a range, not a fixed weight. For example, Sustainable Buildings is listed at 6%-10% and Why We Need Sustainable Development at 4%-6%. These ranges describe the portion of the exam each section is expected to occupy; they should not be converted into exact question counts, because the published figures do not support that precision.
| Domain | Published Range |
|---|---|
| 1. Why We Need Sustainable Development | 4%-6% |
| 2. Sustainable Development: Definitions | 4%-6% |
| 3. Environmental Aspects of Sustainable Development | 5%-7% |
| 4. Social Aspects of Sustainable Development | 4%-6% |
| 5. Governance and Policy for Sustainable Development | 4%-6% |
| 6. Climate Change and Decarbonization | 6%-8% |
| 7. Concept of Sustainable Policy Analysis | 5%-7% |
| 8. Corporate & Industrial Sustainability Programs | 5%-7% |
| 9. Sustainable Buildings | 6%-10% |
| 10. Sustainable Design and Procurement | 4%-6% |
| 11. Green, Clean, and Alternative Energy | 6%-8% |
| 12. Energy Systems and Technologies | 6%-8% |
| 13. Sustainable Transportation | 5%-7% |
| 14. Water Management | 5%-7% |
| 15. Financial Assessment & Life Cycle Costing | 6%-8% |
| 16. Developing & Implementing Sustainability Plans | 7%-11% |
Two patterns stand out. First, the exam is broad: no domain dominates, and even the heaviest ranges are modest. Second, the two highest-ranged domains, Developing & Implementing Sustainability Plans and Sustainable Buildings, are both applied, project-oriented areas. A candidate with a purely conceptual understanding of sustainability will struggle where the exam asks how to actually do the work.
Domains 1-5: Foundations, Definitions, and Governance
The first five domains establish the vocabulary and framing the rest of the exam assumes. They are individually light (mostly 4%-6%, with Environmental Aspects at 5%-7%), but together they form a meaningful share of the test, and they are often the fastest points to secure because the material is conceptual.
Domain 1: Why We Need Sustainable Development (4%-6%)
This domain covers the case for sustainable development: resource constraints, environmental pressures, and the reasons organizations and governments act.
- Be able to articulate the drivers that make sustainability a business and societal necessity
- Connect global trends to practical decisions a sustainability professional faces
Domain 2: Sustainable Development: Definitions (4%-6%)
Precise terminology is the point here. Exam items reward knowing what a term means and how it differs from near-synonyms.
- Learn the formal definitions in the Body of Knowledge rather than relying on everyday usage
- Watch for questions that test the distinction between related concepts
Domain 3: Environmental Aspects of Sustainable Development (5%-7%)
The environmental pillar: how human activity affects air, water, land, and ecosystems, and how those impacts are measured and managed.
Domain 4: Social Aspects of Sustainable Development (4%-6%)
The social pillar, including equity, community, and human well-being considerations that sit alongside environmental and economic factors.
Domain 5: Governance and Policy for Sustainable Development (4%-6%)
How institutions, regulations, and frameworks shape sustainability outcomes. This domain pairs naturally with Domain 7 on policy analysis, so study them in proximity.
These domains reward careful reading of the Body of Knowledge definitions. Because the exam is open-book, a well-tabbed glossary can turn definitional questions into quick lookups, but only if you have organized your references before test day.
Domains 6-8: Climate, Policy Analysis, and Corporate Programs
Domain 6: Climate Change and Decarbonization (6%-8%)
One of the more heavily ranged conceptual domains. Expect questions on how greenhouse gas emissions are understood, inventoried, and reduced.
- Understand the logic of decarbonization strategies, not just the vocabulary
- Be comfortable moving between organizational-level and broader policy-level framing
Domain 7: Concept of Sustainable Policy Analysis (5%-7%)
This domain is about evaluating policies and programs: how to weigh options, assess impacts, and reason about tradeoffs. It is analytical rather than memorization-based, so practice working through scenarios.
Domain 8: Corporate & Industrial Sustainability Programs (5%-7%)
How organizations structure and run sustainability efforts. This is where the exam begins to feel like day-to-day professional practice, and it connects directly to the planning work in Domain 16.
Candidates from an energy-management background often find Domain 6 familiar and Domain 7 less so, since policy analysis frameworks are not a standard part of engineering curricula. If that describes you, give Domain 7 extra time. If you are weighing how the CSDP compares with other credentials in this space, the eligibility and experience differences are covered in CSDP Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Domains 9-10: Buildings, Design, and Procurement
Domain 9: Sustainable Buildings (6%-10%)
The second-highest published range on the exam. Because the range runs up to 10%, this domain can account for a large share of your score, so it deserves serious preparation.
- Cover the principles of high-performance and sustainable building design and operation
- Be ready to apply building concepts to scenarios, not just define them
- Understand how green building programs and rating systems frame sustainability, and how they relate to the broader exam content
Domain 10: Sustainable Design and Procurement (4%-6%)
How sustainability is built into design decisions and purchasing. Think of it as the upstream counterpart to Domain 9: choices about what to specify and buy shape the impacts that follow.
Domains 11-14: Energy, Transportation, and Water
These four domains cover the technical systems that most sustainability programs ultimately target. Together they make up a large block of the exam, and each is ranged between 5% and 8%.
Domain 11: Green, Clean, and Alternative Energy (6%-8%)
Renewable and alternative energy sources, their characteristics, and where they fit into a sustainability strategy. Focus on understanding tradeoffs and appropriate applications rather than memorizing isolated facts.
Domain 12: Energy Systems and Technologies (6%-8%)
The technologies and systems that produce, convert, distribute, and use energy. For candidates coming from AEE's energy-management world, this is typically the most comfortable domain.
Domain 13: Sustainable Transportation (5%-7%)
How movement of people and goods can be made more sustainable, including fleet, fuel, and mode considerations. Candidates from facility or industrial backgrounds sometimes under-prepare here.
Domain 14: Water Management (5%-7%)
Water as a sustainability resource: conservation, efficiency, and management. Water is easy to treat as an afterthought next to energy, but it carries a real published range and appears across other domains such as buildings and corporate programs.
A useful way to study these four together is to notice how they interlock. Energy systems drive transportation choices, water use affects energy demand, and building design touches all of them. Questions that blend topics are plausible, so cross-referencing your notes between domains is time well spent.
Domains 15-16: Costing and Sustainability Plans
The final two domains are where the exam converts knowledge into action, and where the highest published range lives.
Domain 15: Financial Assessment & Life Cycle Costing (6%-8%)
How to evaluate the economics of sustainability measures over their full life, not just first cost. Expect calculation-oriented questions, which is exactly where an approved calculator and organized formula references pay off.
- Practice time-value-of-money reasoning and life cycle cost comparisons
- Be able to explain why a measure with a higher upfront cost may be the better long-term choice
A small naming note: the Certification Scheme table spells this domain's topic as "Costings," while the Body of Knowledge 2.0 and the June 2025 certification overview use "Costing." They refer to the same exam section, so don't be thrown if you see either spelling.
Domain 16: Developing & Implementing Sustainability Plans (7%-11%)
The single highest published range on the exam. This domain tests whether you can take everything else and turn it into an executable plan: setting goals, engaging stakeholders, selecting measures, and carrying them through.
- Treat this as the capstone domain; it draws on nearly every other section
- Study it last, once the earlier domains give you the raw material, then revisit it repeatedly
Key Takeaway
Domains 9 and 16 carry the widest and highest ranges, and both are applied. If you only have time to deepen two areas, make them these, and use Domain 15's costing skills to support your reasoning in both.
Original Practice Questions to Test Your Reading
The following are original study aids written to illustrate the kind of reasoning the domains call for. They are not drawn from live examination content. For a larger set of exam-style items, try the CSDP practice test.
Question 1 (Domain 15 style). A facility is comparing two equipment options. Option A costs less to purchase but has higher annual operating costs; Option B costs more upfront but is cheaper to run. Which approach best supports a sustainability-minded decision?
- Choose the option with the lowest purchase price
- Compare total costs over each option's service life
- Choose the option with the shortest installation time
- Choose whichever option the vendor recommends
Answer: B. Life cycle costing compares costs across the whole service life rather than purchase price alone.
Question 2 (Domain 16 style). A team is drafting a sustainability plan for an organization. Which element most directly turns the plan from a statement of intent into something that can be executed and tracked?
- A mission statement
- Defined goals with assigned responsibilities and measurable indicators
- A list of industry awards
- A general commitment to environmental values
Answer: B. Execution and tracking depend on specific goals, ownership, and measurement.
Notice that both questions reward reasoning over recall. That pattern is common to the applied domains, which is why working scenarios beats rereading summaries.
A Domain-Driven Study Sequence
Rather than a generic schedule, sequence your study around how the domains build on one another. This is one possible arrangement; adjust the pacing to your own timeline and background.
Vocabulary and framing (Domains 1-5)
- Read the definitions closely and tab your glossary
- These domains are quick wins and set the language for everything else
Climate, policy, and programs (Domains 6-8)
- Spend extra time on Domain 7 if policy analysis is new to you
- Connect Domain 8 to the planning work you will see in Domain 16
Technical systems (Domains 9-14)
- Prioritize Domain 9 for its 6%-10% range
- Study energy, transportation, and water as an interconnected set
Costing and planning (Domains 15-16)
- Drill calculations with your approved calculator
- Finish with Domain 16, then loop back to weak areas
Because the exam is open-book, the final phase should also include a dry run of your printed references: can you locate a topic in under a minute? Quick-reference organization is covered in the CSDP Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Fees, Eligibility, and Renewal
Understanding the domains is only part of the picture. The credential also has registration mechanics worth knowing up front.
| Item | Detail |
|---|---|
| Application and exam fee (US) | $400 |
| Retest fee | $200 |
| Renewal | $300 every three years |
| Training tuition (October 13-15, 2026 course) | $1,200 member / $1,300 non-member standard; $1,300 / $1,400 late |
| Course credit | 24 PDH / 2.4 CEU |
The training tuition is a separate purchase from the certification fee, and training registration and exam registration are separate steps. For a full itemization, see CSDP Certification Cost 2026: Complete Pricing Breakdown.
Eligibility requires approved preparatory training, an application, and one qualifying route:
- A four-year engineering or architectural degree, or a PE/RA license, plus three years of related experience
- A four-year science, business, or related degree plus five years
- An associate degree plus eight years
- A current CEM or REP plus three years
- Ten years of experience without the listed education or credentials
"Related experience" means energy efficiency, environmental science, pollution prevention, or sustainable development. A CSDP-IT designation gives candidates six years to meet full eligibility while using the same examination. International applicants should obtain local training, application, exam, and fee details from an AEE-approved training partner.
Certification requires a passing examination and Board approval. Retakes require at least 60 days between attempts, and a passing result must be achieved within three years of training; in-training status cannot be renewed. Renewal requires 10 professional credits per three-year cycle with documentation. One CEU earns two AEE credits, one PDH or contact hour earns 0.2, and continued employment and qualifying professional membership each earn up to three credits per cycle. The initial qualifying seminar cannot earn renewal credit.
Frequently Asked Questions
The current outline, CSDP Body of Knowledge & Study Guide Version 2.0 (effective June 1, 2025), lists 16 exam sections. An older 2017 outline with 15 sections is superseded, even though it may still be linked or taught elsewhere.
Developing & Implementing Sustainability Plans has the highest range at 7%-11%, followed by Sustainable Buildings at 6%-10%. These are published ranges, not fixed weights, so they should not be treated as exact question counts.
Yes, within limits. The exam is open-book and open-notes, but only printed textbooks and bound notes are permitted. Digital reference access is prohibited. Stand-alone calculators without internet or Bluetooth are allowed.
The exam has 111 graded multiple-choice questions to be completed in four hours. Bathroom breaks do not pause the clock, so plan your pacing accordingly.
No. The US application and examination fee is $400, while training tuition for the October 2026 AEE course is priced separately. Training registration and exam registration are also separate steps. See the overview of CSDP certification for background on how the pieces fit together.
Mastering all 16 domains comes down to knowing where the exam concentrates its applied questions, building a printed reference set you can navigate quickly, and practicing scenario-based reasoning. When you are ready to test yourself, head to the CSDP Exam Prep practice site.