OR Landscape Contractor
Oregon Landscape Contractor Licensing Exam
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Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
Oregon requires anyone who installs, maintains, repairs, or contracts to perform landscape work for pay to operate under a license issued by the Oregon Landscape Contractors Board (LCB). The standardized licensing exam is the knowledge gate in that process. It is typically taken by the person who will serve as the business's qualifying individual - the owner-operator, principal, or designated supervisor whose competence the license rests on - though crew leads, estimators, and designers also sit it to sharpen their grasp of the trade.
The exam is broad rather than deep. It mixes Oregon-specific law and LCB rules with the technical side of the trade: plant selection and installation, irrigation and water management, soils, grading and drainage, hardscape construction, turf and ornamental maintenance, integrated pest management, and job site safety. A business and estimating block covers contracts, bidding, and financial management, which surprises candidates who expected a purely horticultural test.
Preparation works best in layers. Start with Oregon law and the LCB rules, since that material is unfamiliar and precisely worded. Then work through the technical domains, tying each to jobs you have actually run. Finish with practice questions taken under time pressure, and review every miss back to the underlying principle rather than memorizing the answer. This guide is independent study material and is not affiliated with or endorsed by the LCB.
What you'll study
About OR Landscape Contractor preparation
What is the exam format?
It is a multiple-choice licensing exam delivered in a proctored setting. The LCB publishes the current question count, time allowance, passing score, and scheduling logistics on its official website, and those details change from time to time, so confirm them there before you register rather than relying on secondhand information.
How difficult is the exam?
Most candidates with real field experience find the horticulture and construction sections manageable. The difficulty is breadth: you must also handle Oregon statute, LCB rules, contract requirements, and estimating. Candidates who only study plants and irrigation are the ones most often caught short.
How long do I have to complete it, and how many questions are there?
The LCB sets and publishes the current time limit and item count. Check the official site for the figure that applies to your testing appointment, and practice with that pace in mind - roughly a minute or so per question is a common planning assumption, but the official number controls.
What happens if I fail - can I retake it?
Retakes are generally available, but the LCB sets the waiting period, fees, and any limits on attempts. Confirm the current retake policy with the Board before you schedule. Use the interval to review your weakest domain rather than simply re-sitting the exam unchanged.
Does passing the exam mean I am licensed?
No. The exam is one requirement among several. Licensing also involves experience verification, surety bond and liability insurance requirements, and application paperwork. The LCB publishes the complete current list of requirements and fees; treat the exam as the knowledge step, not the finish line.
What should I study first?
Start with Oregon law, ORS Chapter 671, and the LCB administrative rules. That material is unfamiliar to most tradespeople, is worded precisely, and appears throughout the exam. Front-loading it means the remaining technical domains reinforce knowledge you already have from the field.
Why do experienced contractors fail?
Three recurring reasons: underestimating the law and business sections as 'common sense,' memorizing practice answers instead of understanding principles, and neglecting water management and soils because they feel routine. Read each question for the Oregon-specific answer, which is often stricter than general industry practice.
Can I bring notes, a calculator, or reference materials?
Assume a closed-book exam. The LCB publishes what is permitted in the testing room and what accommodations are available; check that page before your appointment. Formulas you might need for estimating or irrigation calculations should be memorized or practiced until they are automatic.
How should I build a study plan?
Work domain by domain in the order the exam weights them, spending the most time on law, plants, and irrigation. Take a timed practice set weekly, log every miss by topic, and re-study the underlying rule. Two focused passes over weak domains beat one broad read-through of everything.