Hiring a Landscaper in the Portland Area: Licenses, Permits and Cost Drivers

Quick answer

In Oregon, landscape construction for pay, including planting, irrigation, drainage and patios, requires a Landscape Contractors Board license, while routine maintenance does not. Pesticide applicators need Oregon Department of Agriculture licenses, and backflow testers must be state certified. Tree removal and taller retaining walls can need city permits. Cost depends on scope, materials, access, soil and drainage.

Last updated October 22, 2026

Oregon handles landscaping differently from most states. Here, the people who install your patio, plant your trees or repair your sprinklers are supposed to hold a specific state license, and the Portland-area cities have some of the more detailed tree rules in the region. Knowing who needs what license, which permits might apply, and what actually drives price will help you hire with confidence and compare quotes on more than the bottom line.

The Landscape Contractors Board license

The Oregon Landscape Contractors Board (LCB) states plainly that a license is required when performing landscape construction work for compensation. Its examples include:

Planting lawns, shrubs and trees
Soil preparation and grading
Installing or repairing irrigation
Building or repairing fences, patios, decks and drainage systems

What doesn't need an LCB license? The board describes landscape maintenance, meaning upkeep of an existing landscape such as mowing, pruning, edging, mulching and trimming, as not regulated by the state, though it notes cities and counties may have their own requirements. The LCB also lists adjusting sprinkler heads and programming controllers as work that doesn't require a license. But it is explicit that irrigation repair is not maintenance and does require a license.

You can verify a license through the "Verify a License" link on the LCB website. Ask for the license number in writing and check it before you sign or pay a deposit.

Where the CCB fits

Oregon also has a Construction Contractors Board (CCB) for general construction. The two overlap in places. According to the LCB, either a CCB or LCB license allows tree removal, stump grinding and limb guying, but planting trees requires an LCB license. CCB residential general contractors can do limited landscape work when building a new home, with a dollar cap per dwelling, but not irrigation. In practice, for a landscape project, ask which board licenses the company and make sure that license covers the work you're hiring them to do.

Pesticide licenses

If a lawn or landscape program includes weed killers, moss control or insect treatments, licensing shifts to the Oregon Department of Agriculture. ODA requires a commercial pesticide operator license for a business that advertises pesticide application services or applies pesticides on other people's property, and a commercial applicator license for the individuals who apply them. Ask for both, and ask how much notice you get before applications.

Backflow testing

Every in-ground sprinkler system on a public water supply needs a backflow prevention assembly, and in Portland the Water Bureau requires it to be tested every year by a state-certified tester. The Oregon Health Authority keeps the list of certified testers. Other providers around the metro run similar programs. Many irrigation companies have a certified tester on staff, but confirm it, and don't let a test lapse if you're hoping to claim a utility rebate on a new controller, since some rebates require an up-to-date test.

Permits that commonly come up

Trees

Tree rules vary by city and are often the permit homeowners trip over:

Portland requires a permit to remove private trees 12 inches or more in diameter, measured 4.5 feet above the ground. Heritage Trees and street trees have separate rules through Urban Forestry.
Gresham treats trees over 8 inches in diameter as regulated and gives extra protection in hillside, floodplain and habitat areas. Removing more than a small number of regulated trees, or any in a protected overlay, can trigger a longer review.
Lake Oswego runs a tree permit program that can require replacement trees.
West Linn handles tree removal permits through Parks and Recreation, with the City Arborist reviewing applications.

Other cities have their own rules. Make it clear in the contract who is responsible for getting any tree permit.

Retaining walls and grading

Walls above a certain height, or walls that support a driveway, structure or steep slope, commonly need a building permit and sometimes an engineer's design. Thresholds vary, so check with Portland Permitting and Development or your city's building department. On steep or landslide-prone lots, expect geotechnical input.

Stormwater and sensitive areas

In Washington County cities such as Beaverton, Hillsboro and Tigard, Clean Water Services lists relandscaping among the projects that may need its environmental review, and city permits wait on that step. Portland has environmental overlay zones along streams and natural areas. If your lot touches a creek, wetland or steep ravine, ask before you plan.

Utility locates

Oregon's locate service through Oregon 811 is free, and requests should go in at least two business days before digging. The contractor typically places the request, but confirm it was done before trenching, tilling or post-hole digging begins.

Rebates worth checking

Several metro water providers, including the Portland Water Bureau and Tualatin Valley Water District, have offered rebates on WaterSense labeled irrigation controllers and efficient sprinkler nozzles. Programs change and have conditions, so check your provider's current terms before you buy. We did not find a lawn replacement or turf removal rebate from the main metro water providers. In Portland, managing roof water on site may also qualify for a stormwater discount through Clean River Rewards.

What drives the cost

We don't publish local prices, because they vary too much by project to be useful. These are the factors that move a Portland-area estimate up or down:

Scope and size: square footage of beds, lawn or patio, and linear feet of wall, drain or fence.
Materials: plant sizes and quantities, paver or stone choice, wall block, and irrigation components.
Site access: narrow side yards, steep lots and stairs mean more hand labor.
Soil and drainage: removing old turf, ivy or blackberry, hauling soil, importing base rock and building drainage add up, especially on wet or sloped lots.
Engineering and permits: taller walls, hillside work and tree permits add time and fees.
Season: spring is the busiest time, and winter work in saturated soil can be slower.
Restoration: repairing lawn and beds disturbed by equipment.

How to compare quotes

Make sure every estimate describes the same project in writing: plant species and sizes, soil prep, base depth and compaction for hardscape, drainage details and outlet locations, irrigation zones and controller, who handles permits and locates, cleanup and haul-off, and any warranty. Ask for the LCB or CCB license number, a certificate of insurance, and photos or addresses of similar work. A bid that's much lower than the others often skips base prep, drainage or licensing, which is exactly where Portland projects fail.

Timing your project

Plan in winter, plant in fall or spring, and schedule hardscape and drainage for drier stretches when possible. Booking early helps, since companies fill up quickly once spring arrives. When you're ready, read our design and installation page or request a landscaping company.

Frequently asked questions

Does someone who only mows my lawn need a license?

The Oregon Landscape Contractors Board says routine landscape maintenance such as mowing, pruning and edging is not regulated by the state, though local rules may apply. If they apply pesticides or repair irrigation, other licenses come into play.

How do I check a landscaper's Oregon license?

Use the Verify a License link on the Oregon Landscape Contractors Board website. For general contractors, the Construction Contractors Board has its own license search.

Who gets the tree permit, me or the contractor?

Either can, depending on the city, but the property owner is ultimately responsible. Agree in writing who will apply, and don't let work start until the permit is issued.

Sources and further reading

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