LEED AP O+M Exam Prep (LEED v5)

This free LEED AP O+M exam prep guide follows GBCI's v5 O+M exam specifications: a domain priority map, a worked water-credit example, 27 original practice questions and a four-week plan. The O+M exam is still in beta, so scores are held until USGBC releases them, tentatively in February 2027 (current v5 exam guidance).

Worked example: turn a year of water data into a credit result

Original, unofficial example. U.S. units, as the exam shows them first.

A single-use office has 10,000 ft² of gross floor area. Over a complete 12-month reporting period it used 104,000 U.S. gallons of potable water. Assume the boundary, data and other requirements are valid. What is its water use intensity (WUI), its reduction from the office baseline, and its points under Water Efficiency Performance (WEc1)?

The four-field check

Before you calculate anything on an O+M performance question, pull out four things:

1. Which item and option. Prerequisite or credit? Which option or path? Point tables differ.
2. Period and baseline. A full reporting period? Compared with a historical baseline, a peer group, or a space-type target?
3. Metric and units. Total or intensity? Site or source energy? Gallons, kBtu, kWh or kW?
4. Stated conditions. Occupancy, exclusions, boundary, anything the question tells you to assume.

Now try Question 16, which uses the same method on energy data.

Jump to the practice questions

What the v5 O+M exam covers

Question counts are GBCI's published allocations in the LEED AP O+M v5 exam specifications (Exam specifications → LEED AP O+M v5, knowledge domains 1–8). They add up to 85. The exam itself has 100 questions, a mix of scored and unscored ones, and the handbook doesn't specify how many are unscored. Shares are our rounding of 85.

Energy and indoor quality together are 38 of the 85 allocations, about 45%. That tells you where the exam puts its weight. It isn't a rule for splitting your study hours; spend extra time on whatever you can't yet explain.

One shift to notice if you're coming from LEED BD+C: most O+M v5 topics are about measured performance. You'll see reporting periods, historical baselines, meter data, audits and surveys, rather than relying only on design-stage predictions. Many credit names even end in "Performance."

Review notes by domain

These notes cover the distinctions the practice questions test. They don't replace the reference guide; use them to know what to look for when you read it.

LEED Process: requirements before points

Points come from optional credits. Prerequisites are required at every certification level, so a big point total can't make up for one that's missing. Keep the person and the building separate, too: you earn a credential by passing an exam, while a building earns certification through a review of its data. (Guide to LEED Certification: Commercial, Apply and Certify)

LEED v5 sorts its outcomes into three impact areas: decarbonization, quality of life, and ecological conservation and restoration. Those aren't credit categories. Points that v4 notes filed under Innovation and Regional Priority now fall under Project Priorities, which covers regional priority, project-type priorities, exemplary performance, pilot credits, innovative strategies and having a LEED AP O+M as an on-site principal participant on the property management team. Platinum takes more than a points total, so read the Platinum requirements on their own. (PRc1 and Appendix I, printed pp. 82–84; PDF pp. 88–90) (Exam specifications, LEED Process 1.1–1.8)

Integrative Process: plans that match the building you actually run

Two assessments look outward. The Climate Resilience Assessment covers climate hazards, emissions scenarios, and acute and chronic stressors. The Human Impact Assessment covers working conditions, equity, vulnerable populations, demographics and occupant experience. Both are required, so they don't compete with each other. (IPp1–IPp2, printed pp. 6–9; PDF pp. 12–15)

Four items turn that into operations. The current facilities requirements (CFR) and O+M plan describe how the building is meant to run, including equipment set points. Operations Assessment and Policy sets policies such as purchasing, renovations and green cleaning. Operational Planning for Resilience adds staff roles, continuity of operations and an emergency response plan. Worker Safety and Training covers the safety program and training. A useful habit: when something changes in the building, trace it from the change, to the document it affects, to the person responsible, to the evidence it was done. (IPp3–IPp4 and IPc1–IPc2, printed pp. 10–15; PDF pp. 16–21) (Exam specifications, Integrative Process 2.1–2.7)

Location and Transportation: travel behavior and location efficiency

The Transportation Survey option measures how occupants actually travel. LTc1 also offers a Location Efficiency Score option using Walk Score; the survey is not the only route. (LTc1, Options 1–2, printed pp. 16–17; PDF pp. 22–23) Transportation demand management covers unbundled parking, shared mobility and bicycle facilities. Unbundled parking means the cost of a parking space is charged separately from rent or purchase, so people who don't need a space don't pay for one (USDOT, Parking Reforms). EV equipment is its own credit.

Sustainable Sites: match the fix to the problem

Heat islands, light at night and glass that birds hit are three different problems with three different fixes. For a roof, solar reflectance is the property that matters most. It's how much sunlight the surface reflects instead of absorbing. Thermal emittance is how well the surface sheds heat it has already absorbed (EPA, cool roofs). For bird collisions, glass is rated by threat factor, and the O+M option sets a maximum, so lower is better (v5 O+M SSc2, Option 2, printed p. 25).

Water Efficiency: make the numbers comparable

A water result is only as good as its data. Check the source (potable or alternative water), the area, the period, the units and the space-type baseline. A full year matters because water use is seasonal: irrigation and cooling towers can swing a summer quarter far above a winter one. Water use intensity divides total use by floor area so buildings of different sizes can be compared.

Submeters do a different job. A submeter sits downstream of the main meter and records part of the building's use, such as a cooling tower (DOE, Federal Metering Guidance, p. ix). That's how an operator separates a cooling-tower problem from everything else and then confirms a repair worked.

Do not confuse DOE's definition of an advanced meter with LEED Advanced Water Metering (WEc2). That credit requires permanent metering for at least two listed water subsystems, with coverage requirements for each. All meters, including whole-building meters, must be recorded at least weekly and used to analyze trends; meters owned by the building owner, management organization or tenant need calibration at the manufacturer's interval. (WEc2, printed p. 29; PDF p. 35)

Energy and Atmosphere: four numbers that aren't interchangeable

Four more distinctions:

• ENERGY STAR score. The 1–100 score compares a building with national peers of the same type, with 50 at the median and 75 or higher marking a top performer. It's calculated on source energy, which counts the losses in producing and delivering energy, not just the site energy on the bills (ENERGY STAR).
• Emissions scopes. Burning gas in your own boiler is Scope 1. Purchased electricity is Scope 2 (EPA).
• Renewable claims follow the renewable energy certificates (RECs). If a building sells the RECs from its rooftop solar, the buyer holds the claim (EPA, double counting).
• Commissioning finds problems, fixes them and verifies the fix. Retro-commissioning is for older buildings that were never commissioned (DOE FEMP).

Materials and Resources: prevent first, then keep the denominator honest

EPA ranks source reduction and reuse above recycling and composting, and both above energy recovery and disposal (EPA waste hierarchy). To calculate a diversion rate, use one period and one unit (usually weight). Divide what was diverted by everything generated. Missing records aren't zero waste. Don't count reused material twice. Seasonal or intermittent streams, such as a furniture cleanout, still belong in the ledger. The rating system decides which methods count as diversion, so check MRc1 before adding a stream to the numerator. (MRc1, printed pp. 58–59; PDF pp. 64–65)

Indoor Environmental Quality: what the evidence shows, and what it doesn't

A survey response rate tells you how many people answered, not how satisfied they are. For air quality, start with the source. EPA combines source removal or isolation, ventilation and filtration (EPA office IAQ guide). Integrated pest management (IPM) means identifying and monitoring pests, setting action thresholds, preventing problems, and using the lowest-risk control that works. Broadcast spraying is a last resort, not a ban (EPA IPM). The handbook names two Resilient Spaces management modes: one for respiratory diseases and one for episodic outdoor ambient conditions, such as wildfire smoke. (EQc6, printed p. 76; PDF p. 82)

LEED AP O+M practice questions (27, LEED v5)

These are original, unofficial Castleport questions written for the v5 O+M exam specifications. They aren't GBCI exam questions, and your score here doesn't predict your exam result.

This is a starter set covering all eight domains. It isn't a full-length exam. Each question has one best answer. Choose yours, then open the explanation.

How to use your results

Count one point for each correct answer out of 27, and mark any you skipped as skipped. Your percentage is how you did on these 27 questions, nothing more. It isn't a scaled score, and two to seven questions per domain is too few to measure domain readiness reliably. Use your misses to decide what to study next.

Keep a short mistake log as you go:

Your four-week LEED AP O+M study plan

This plan assumes five one-hour sessions a week (20 hours total), that you've already earned the Green Associate, and that you have the current v5 O+M reference material. It's our editorial plan, not a GBCI requirement or a promise that 20 hours is enough. A typical session runs about 10 minutes recalling earlier material, 30 minutes on the new topic, and 20 minutes applying it.

Need more time? Stretch the same 20 sessions over six weeks at three or four a week. If your Green Associate basics are rusty, add review first. If you run buildings for a living, move quickly through what you can already explain, and spend the time on LEED-specific rules. Don't keep retaking the same 27 questions until the percentage looks good; at that point you're testing memory.

Which exam will you sit if you book now?

It depends on the date you test, not the date you register. Every current O+M option is LEED v5, because the last v4 O+M test date was June 28, 2026.

Sources: USGBC, LEED v5 exam information (updated October 9, 2026) and the Candidate Handbook (Exam version). The discounted prices are our arithmetic from the published 50% discount. February 2027 is USGBC's tentative estimate, not a guaranteed date.

What else applies during the beta:

• English only, and no combined exam. You can't pair the Green Associate and the AP O+M in one sitting during the beta.
• A beta pass earns the same credential. USGBC says v4 and v5 exams lead to the same credential with the same recognition.
• Scores can't be released early. Beta results come out when the analysis is finished, and the final exam publishes after that.
• A Green Associate earned on v4 still makes you eligible, as long as it's active.

How to decide: if you're ready before the beta deadlines and the discount matters, the beta is the cheaper attempt, but you'll wait months for a score. A beta seat cannot provide a result before the beta scores are released. Don't build a deadline around the tentative February 2027 date.

To register, sign in to your USGBC credentials dashboard, choose LEED AP O+M, select either the beta opt-in or standard registration option for your intended testing window, and pay. You'll get an eligibility ID; then you schedule with Prometric at a test center or online.

Exam facts at a glance

Sources: Candidate Handbook (Eligibility, Identification, Registration, Accommodations, Exam format); About the LEED AP with specialty exam; Exam registration and purchasing policies; Exam Results; Preparing for the LEED AP with Specialty exam.

Do you need LEED O+M project experience?

No, you don't have to document any. GBCI strongly recommends it, though, and the questions assume practical knowledge. If you haven't worked on a LEED O+M project, use a building you know. Pull a year of its utility and water bills, run the four-field check, and work out its EUI and water use intensity. Then read the v5 credit language for each topic and ask what evidence that building would need. (About the LEED AP with specialty exam)

LEED AP O+M or BD+C?

O+M fits people who run, manage or improve existing buildings: facility managers, building engineers, property and sustainability teams. BD+C fits people who design and build new buildings or major renovations. The two exams use different domain maps. Energy, for example, is 21 of 85 allocations on O+M and 18 of 85 on BD+C, and the topics differ too. (Candidate Handbook, O+M and BD+C exam specifications; Specialty descriptions) If design and construction is your work, use our LEED AP BD+C exam prep instead. Still need the first credential? Start with LEED Green Associate exam prep.

After you pass

Once GBCI confirms your result in writing, you can use "LEED AP O+M" after your name. Never use "LEED Accredited Professional." The specialty credential replaces your Green Associate. To keep it, earn 30 continuing education (CE) hours in each two-year reporting period. At least 6 of those hours must be LEED-specific to O+M. Active participation on a registered or certified LEED project under the matching rating system earns 1 CE hour per credit you worked on. You also need to renew and pay the renewal fee; CE hours alone don't keep the credential active. (Candidate Handbook, Designating your credential; CE hours; Renewing your LEED credential)

Which references should you use?

Use the handbook for the exam's scope and rules, and the rating system for credit requirements. The handbook's O+M reference list names:

• the LEED v5 Reference Guide for Operations and Maintenance (use the edition the current handbook lists)
• Foundations of LEED
• the Guide to LEED Certification: Commercial
• USGBC's Addenda Database

The free July 2026 O+M rating system PDF holds the requirements and point tables cited in this guide. It isn't the complete reference guide. Older v4 or v4.1 O+M notes are useful only for concepts you've checked against v5. Credit names, prerequisites, points and thresholds have changed.

Sources

Official exam and credential sources (GBCI/USGBC)

• LEED AP with Specialty Candidate Handbook — O+M v5 exam specifications, format, eligibility, ID, registration, accommodations, references (updated September 2026)
• LEED v5 exam information — beta phases, dates, discount, result timing (updated October 9, 2026)
• About the LEED AP with specialty exam — eligibility and fees (updated August 6, 2026)
• Preparing for the LEED AP with Specialty exam — exam version and units (updated October 9, 2026)
• Exam registration and purchasing policies — eligibility period and extension (updated September 11, 2026)
• Exam Results, CE hours, Renewing your LEED credential

Rating-system requirements

• USGBC LEED v5 Rating System: Operations and Maintenance, July 2026 — IPp1–IPp4, IPc1–IPc2, LTc1, SSc2 Option 2, WEp1, WEc1 Tables 1–2, WEc2, EAc1, MRc1, EQp2, EQc1, EQc3, EQc6, PRc1 and Appendix I. Credit links give printed and PDF page numbers.

Teaching sources

• ENERGY STAR: How the 1–100 score is calculated, What is EUI?, Source and site energy
• EIA: British thermal units, Measuring electricity
• EPA: Scope 1 and Scope 2 guidance, Double counting, Cool roofs, Waste management hierarchy, Office building IAQ guide, Integrated pest management
• DOE: Commissioning in Federal Buildings, Federal Metering Guidance (2022)
• USDOT: Parking Reforms

Last verified October 15, 2026: exam version and beta timeline, eligibility, format, scoring, fees, registration policies, O+M domain counts, credential maintenance, the cited rating-system requirements, and the teaching principles used in the worked example and answers. The study plan is an editorial planning aid, and the numbers in the exercises are hypothetical.

Castleport Test Prep is an independent exam prep publisher. We are not affiliated with, endorsed by, or approved by Green Business Certification Inc. (GBCI) or the U.S. Green Building Council (USGBC). LEED and related credential names are used only to identify their subjects; trademarks belong to their respective owners. The practice questions on this page are original and are not official exam questions.

By Castleport Test Prep Editorial Team

Developed with AI assistance and checked against the sources above. These source and editorial checks are not a credentialed professional review. How we create study resources.