- What HBDP Stands For
- Who Issues the Credential
- What the Credential Signals
- The Seven Domains Behind the Name
- How the Exam Is Built and Delivered
- Eligibility Routes and Fee Mechanics
- Why the Acronym Causes Confusion
- Reading Versions and Conflicting Summaries
- Where HBDP Fits Among Related Credentials
- Keeping the Credential Current
- A Domain-Ordered First Month
- Frequently Asked Questions
- HBDP means High-Performance Building Design Professional, an ASHRAE certification. Other credentials share the acronym, so always confirm the issuer.
- The current exam outline has seven domains; Energy Analysis is the heaviest at 22% of the 100 scored items.
- You sit 115 questions in 2 hours 30 minutes. Fifteen are unscored trial items, and 70 of 100 scored items passes.
- ASHRAE membership is not required; four experience routes lead to eligibility, and fees differ for members and nonmembers.
What HBDP Stands For
HBDP stands for High-Performance Building Design Professional. It is a professional certification issued through ASHRAE's certification program, aimed at people who design buildings meant to perform well on energy, indoor environment, water, controls, and verified operation, rather than merely meeting minimum code on paper.
The words in the name each carry weight. "High-performance" signals measurable outcomes: energy use, carbon emissions, comfort, water efficiency, and whether the building does what the design promised. "Building design" places the credential in the design and engineering phase, not in facility operation or construction management. "Professional" means the credential is earned by demonstrating knowledge and experience, then maintained through renewal, rather than being a one-time course completion certificate.
If you landed here from a search for the acronym alone, this page covers one credential only. For related phrasing, see our explainers on what HBDP stands for, what HBDP is, and what HBDP certification involves.
Who Issues the Credential
The governing body is ASHRAE, the professional society behind many of the standards and guidelines that building designers use daily. The certification is administered through ASHRAE's certification program, and the exam is delivered through Kryterion test centers with scheduling handled through Webassessor.
That issuer relationship shapes the exam. Because ASHRAE writes the standards, the official preparation resource list leans heavily on its own documents: Standards 15, 55, 62.1, 90.1, 100, 105, 147, 189.1, 202, 209, 211, and 228; Guidelines 0, 14, 32, and 36; ASHRAE Handbook volumes; and related design and decarbonization guides. The resource list does not make purchase compulsory, and it does not name a single required edition for every document, so check the current resources page before buying anything.
What the Credential Signals
An HBDP credential tells a hiring manager or project owner that the holder has met an experience threshold, accepted a code of ethics, and passed a proctored, closed-book exam covering the full life of a high-performance project: analysis, design environment, controls, benchmarking, water, and commissioning.
Typical holders are mechanical and building-systems engineers, architects working on performance-driven projects, energy consultants, sustainability leads, and commissioning professionals. Firms that pursue performance-based, decarbonization, or green-building work have a natural interest in staff who can show a recognized credential, and some owners reference credentials in qualification requirements. We cover the job angle in more depth in our HBDP jobs overview.
A caution on earnings claims: there is no HBDP-specific salary premium established by the sources we reviewed. Government occupational data describes engineering occupations in general, not what a certification adds. If compensation is your main question, read the HBDP salary guide and the HBDP ROI analysis for how to reason about value without inventing numbers.
The Seven Domains Behind the Name
The clearest way to understand what "high-performance building design" means in this credential is to read the current exam content outline. ASHRAE's Candidate Guidebook, Appendix A, lists seven domains. Their published weights total 100% of the 100 scored items.
| Domain | Weight | What it asks of you |
|---|---|---|
| 1. General Information | 11% | Foundational concepts and context for high-performance design |
| 2. Energy Analysis | 22% | Analyzing and comparing building energy performance, including carbon emissions compliance |
| 3. Indoor and Site Environment | 16% | Occupant-facing conditions and site-related design factors |
| 4. Controls and Monitoring | 15% | Control strategies and monitoring that sustain performance |
| 5. Benchmarking with Performance Metrics | 13% | Measuring and comparing results against defined metrics |
| 6. Water Conservation | 11% | Reducing building and site water use |
| 7. Commissioning | 12% | Verifying that systems are delivered and operate as designed |
Domain 2: Energy Analysis (22%)
This is the largest single domain and the one most likely to separate prepared candidates from casual ones. Its Carbon Emissions Compliance subdomain carries four scored items, so decarbonization is explicitly in scope, not an afterthought.
- Expect calculation-minded scenarios where a basic nonscientific calculator helps.
- Standard 90.1 and Standard 189.1 are natural anchors for this area, along with the Handbook volumes listed in the official resources.
- Practice explaining why one design option beats another, not just computing a number.
Domains 3 and 4: Indoor and Site Environment, Controls and Monitoring (31% combined)
Together these two domains carry nearly a third of the scored items. They reward candidates who think about what occupants experience and how automated systems keep it that way.
- Standards 55 and 62.1 connect directly to comfort and ventilation questions.
- Guideline 36 is relevant to high-performance sequences of operation for HVAC systems.
- Controls questions often test whether you can reason from a described system to the correct conclusion.
The remaining domains round out the lifecycle view: benchmarking tells you whether a building is actually performing, water conservation extends "performance" beyond energy, and commissioning closes the loop between design intent and delivered reality. For a domain-by-domain walkthrough, see our complete guide to the seven HBDP content areas.
How the Exam Is Built and Delivered
Meaning is also practical: knowing what you are signing up for. The exam is proctored, computer-based, single-best-answer multiple choice, closed book, and closed notes.
- Length: 115 questions, of which 100 are scored and 15 are unscored trial items interspersed throughout. You cannot tell which are which, so treat every question as live.
- Time: 2 hours 30 minutes. Breaks do not stop the timer.
- Passing score: 70 correct out of 100 scored items, confirmed by the guidebook, the Certification Committee's decision, and ASHRAE's certification FAQs. See the HBDP passing score article for detail.
- Tools: a basic nonscientific, nongraphing calculator is allowed; test-center personnel provide scratch paper and a pencil.
- Identification: two acceptable IDs, including government-issued photo identification whose name matches your registration, plus your examination authorization code.
- Extra time: qualifying non-native English speakers receive thirty additional minutes after self-attestation, declaration of native language, and provision of a professional reference who can confirm that status. That reference is not a requirement for other applicants.
We could not verify current at-home proctoring or adaptive testing, so plan on a Kryterion test center unless ASHRAE tells you otherwise during scheduling. Dates and logistics are covered in the HBDP exam dates guide, and difficulty is discussed in how hard the HBDP exam is.
Eligibility Routes and Fee Mechanics
Four ways to qualify
You do not need ASHRAE membership, a prep course, or a purchased publication. Eligibility rests on education or licensure plus building-system design experience:
| Route | Credential | Design experience |
|---|---|---|
| A | Government-recognized professional engineer or architect license | 4 years |
| B | Accredited engineering or related bachelor's degree | 5 years |
| C | Accredited relevant associate/technical degree or certificate | 7 years |
| D | High-school completion or equivalent | 10 years |
All applicants accept the Code of Ethics and must pass the exam. Details and edge cases are in our HBDP requirements article.
What the application costs
Current USD application fees, which include the examination, are $495 for ASHRAE members, $295 for Developing Economies members, and $745 for nonmembers. Corporate groups receive a quote. Once approved, you have a ninety-day window to schedule and sit; a forty-five-day extension costs $50 and must be requested at least five business days before the window expires.
If you need a retake, the first one after a three-month wait costs $220 for members, $130 for Developing Economies members, or $285 for nonmembers. Later retakes require the full applicable application fee. The HBDP certification cost breakdown puts these figures side by side with renewal charges.
Why the Acronym Causes Confusion
Searching "HBDP" can return material about other credentials that happen to share the same four letters. Those are different programs with different issuers, fees, dates, and content. Nothing on this page applies to them, and nothing about them applies here.
To avoid mixing sources, use this checklist whenever you read an HBDP page:
- Check the issuer. It should say ASHRAE.
- Check the expansion. It should read High-Performance Building Design Professional.
- Check the domains. The seven current domain names listed above should match.
- Check the format. 115 questions and 2 hours 30 minutes should appear for the current exam.
If a page fails any of these, it is probably describing something else, or describing an outdated version. For other phrasings people search, see our pages on the HBDP meaning, what HBDP means, and what an HBDP is.
Reading Versions and Conflicting Summaries
The outline has changed over time, and public summaries do not always agree. Here is the dated picture we could verify as of October 10, 2026.
- Current outline: ASHRAE's HBDP Candidate Guidebook, Appendix A, lists seven domains. The guide has no overall publication date or exam-form code, and Appendix B is marked "Revised 3/2025," which is not an independently named 2026 exam edition.
- Effective dates: an ASHRAE newsletter dated April 23, 2025 announced updated outlines effective June 1, 2025, with a June beta window. The Certification Committee's July 30, 2025 approved minutes confirm June beta testing and adoption of 70 as the passing score for that cohort and subsequent candidates.
- New form launch: the committee's January 31, 2026 approved minutes identify August 2025 as the launch of the new exam form. Outline effectiveness, beta administration, and form launch are three separate events.
- Earlier forecast: a 2023 announcement anticipated a first-quarter 2024 release of building-decarbonization-related job tasks. We treat that as a forecast, not as the actual launch.
- Legacy outlines: older standalone content outline copies list eight top-level areas, including an additional Energy and Materials Use and Management area, with different allocations. They do not supersede the current seven-domain guide.
One more source wrinkle: the general certification FAQ retains legacy PSI/AMP provider wording, while the current program page and guidebook specify Kryterion. When sources disagree, prefer the exam-specific guide and the dedicated current program page.
Where HBDP Fits Among Related Credentials
High-performance design sits near other building-performance credentials, but each has its own scope.
| Credential | General orientation |
|---|---|
| HBDP (ASHRAE) | Whole-project performance across analysis, environment, controls, benchmarking, water, and commissioning |
| BEMP (ASHRAE Building Energy Modeling Professional) | A separate ASHRAE credential centered on building energy modeling |
| LEED AP with specialty (USGBC) | A separate USGBC credential tied to the LEED rating system |
These comparison pages describe separate credentials and do not supply HBDP objectives, so treat them as context rather than study material. A designer who models energy heavily might pursue both HBDP and BEMP; a project team working toward LEED certification might value a LEED AP specialty alongside HBDP. Which is right depends on your role, your employer's project types, and what clients ask for.
Keeping the Credential Current
Earning HBDP is not permanent. Certification renews every three years, with the deadline falling on December 31 of the third year after certification. ASHRAE's example: certification earned in 2026 must be renewed by December 31, 2029.
- Requirement: 45 relevant professional development hours (PDHs), ethics compliance, a completed application, and payment.
- Project credit: up to 21 PDHs may come from qualifying high-performance building design projects.
- 2026 change: beginning in 2026, at least 50% of required PDHs must be continuing education.
- Teaching credit: three PDHs per hour for the first presentation and one per hour for each of the next two equivalent presentations, capped at 15 PDHs per cycle. The current HBDP page's 2026 rules supersede older teaching-credit wording in Appendix B.
- Renewal fees: $245 member, $145 Developing Economies member, $375 nonmember.
- Grace period (January 1 to March 31): $375, $225, and $495 respectively. PDHs earned after expiration cannot be applied to the previous cycle.
The general FAQ shows older, lower renewal prices; the exact current program page governs. Because a meaningful share of your PDHs must now be continuing education, start logging hours early in each cycle instead of reconstructing them in the final months.
A Domain-Ordered First Month
Once you know what the credential means, the next question is how to start. This is a suggested ordering driven by the domain weights, not an official plan, and it assumes you already meet an eligibility route.
Outline and standards map
- Read Appendix A of the Candidate Guidebook and the public sample items.
- Cover Domain 1 (General Information) while you build a list of which listed standards map to which domains.
Energy Analysis first
- Spend the longest block on Domain 2 (22%), including Carbon Emissions Compliance.
- Work calculation-style problems with a basic nonscientific calculator, since that is what you will have.
Environment and controls
- Pair Domain 3 (Indoor and Site Environment) with Domain 4 (Controls and Monitoring), since they interact in real designs.
- Defer Benchmarking, Water Conservation, and Commissioning to the following weeks.
The optional official practice exam has 30 questions, costs $49, and is single use within thirty days of purchase. It is neither a certification exam nor a validated diagnostic or pass predictor, so use it to practice format and pacing, not to forecast your result. Our HBDP study guide expands this into a full plan, and the HBDP cheat sheet condenses the facts into one page. You can also work through original questions on the main practice test site.
Key Takeaway
Treat the exam outline as the real definition of HBDP. If a topic is not in one of the seven domains, it is not what the credential measures; if it is, the domain weight tells you how much study time it deserves.
Frequently Asked Questions
HBDP stands for High-Performance Building Design Professional, a certification offered through ASHRAE. Other credentials use the same four letters, so confirm the issuer and the full name before relying on any page.
No. Membership is not required. Members do pay lower application and renewal fees than nonmembers: $495 versus $745 to apply, and $245 versus $375 to renew.
There are 115 questions in 2 hours 30 minutes. One hundred are scored and 15 are unscored trial items. You need 70 correct out of the 100 scored items to pass.
The current outline has seven: General Information (11%), Energy Analysis (22%), Indoor and Site Environment (16%), Controls and Monitoring (15%), Benchmarking with Performance Metrics (13%), Water Conservation (11%), and Commissioning (12%).
The sources we reviewed do not establish an HBDP-specific salary increase, so we do not assume one. Value depends on your role, your employer's project mix, and whether clients or colleagues recognize the credential. See our ROI analysis for a framework.