Monaghan's Landscaping

4.6

(150)

LandscapingPortland, OR

(503) 847-9110 Get quote

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We're Monaghan's Landscaping, a family-owned and locally-owned landscaping company serving the Portland metro area since 1987. Founder Jamie Monaghan has built this business around one simple idea: landscaping done right, documented clearly, and backed by a real warranty. Nearly four decades in, we still walk every property, listen to what you want, and put it all in writing before any work begins. We handle the full range of outdoor work. That includes retaining wall installation, sod lawn installation, automatic sprinkler systems, artificial turf, and paver patios and walkways, plus drainage solutions, landscape design, grading and erosion control, landscape lighting, fire pits, outdoor kitchens, tree and shrub planting, seasonal cleanups, sprinkler repair, and commercial landscaping. Everything we build is designed for Portland's clay soil, seasonal rainfall, and freeze-thaw cycles. We work with homeowners across Multnomah, Clackamas, and Washington Counties, along with property managers, HOAs, and businesses. Whether you need a leveled backyard, a lawn installed in a day, or a full design-build project, we scale to fit your goals and budget. What makes us worth a call: we're a licensed Oregon landscape contractor (LCB# 7419), and every project starts with a free on-site consultation and a written, line-item estimate. You'll know the scope, timeline, and cost before you commit. Our work is covered by a 3-year workmanship warranty, with warranty terms spelled out in your proposal. We accept cash, check, credit card, and Venmo. Reach us at (503) 847-9110 or info@monaghanslandscaping.com to get started.

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Licensed OR contractorLCB# 7419Serving Portland sinceFamily owned + localFree on-site estimates3-year workmanshipRetaining walls + paversSod + artificial turfDrainage + sprinklersServing Portland metro

Services

Retaining wall installation

Professional retaining wall installation for residential and commercial properties in the Portland metro area. Concrete block, natural stone, boulder, and timber walls built for Oregon's clay soil and seasonal rainfall.

from $3,500 – $50,000

Sod lawn installation

A finished lawn in a single day, using perennial ryegrass and fine fescue blends grown in the Willamette Valley and recommended by OSU Extension for Western Oregon. Includes soil prep, grading, and installation on Portland's clay-heavy soil.

from $1,500 – $12,000

Automatic sprinkler system installation

Properly zoned irrigation system with smart controllers, backflow compliance, and zone-by-zone coverage designed for your property. Includes new installations, retrofits, and backflow prevention per Portland Water Bureau requirements.

from $3,000 – $8,000

Artificial turf installation

UV-stabilized synthetic turf on a drainage-ready aggregate base built for Portland's rain, giving you a clean, green yard year-round with zero maintenance. Includes antimicrobial infill and proper drainage integration.

from $5,000 – $20,000

Paver installation

Concrete, brick, natural stone, and permeable pavers for patios, walkways, and driveways on properly prepared bases designed for Portland's clay soil and freeze-thaw cycles.

from $3,000 – $25,000

Read our 150 reviews

Well-run and honest, Monaghan's landscaping did a big job putting in an 11-zone sprinkler system for me and it continues to work beautifully 2 years later. I appreciate their helpfulness and professionalism. Definitely would hire again.

Erik Steen

Every aspect of the work done by Monaghan's Landscaping was impressive, resulting in a stellar, desirable outcome. Jamie Monaghan's knowledge and commitment to his craft produced an opportunity for a harmonious collaboration throughout the project.

Susie Vischer

From start to finish Monaghan's Landscaping did a fabulous job! They communicated clearly. They were professional, efficient, and friendly. The crew took pride in their work. And, of course, my wall looks great.

Roxanne Hill

We used Monaghan Landscaping for a fairly major paving and retaining wall project in the back and side of our house. Lots of dirt was moved! The crew was very professional and we were extremely pleased with the outcome, so much so that we hired them again.

Karen Andrus-Hughes

I worked with Monaghan's on a small project at our house to install a flagstone patio and gravel pathway in our fairly small back yard. They did a fantastic job, quickly, at a reasonable market price and were able to schedule me in much sooner than expected.

Michael Hager

We had a great experience with Monaghan's Landscaping for our side yard landscaping project involving installing pavers, building steps, and raised beds over a slope. They were extremely professional and delivered excellent work.

Arun

Jamie and the team did an amazing job with our yard! They removed the river rocks that filled our yard, evened the ground, and put down a beautiful lawn that took root easily. But before they did any of that, Jamie came over and walked the property with us.

Jordan G

From the moment we reached out to receive a quote about a project for our backyard, the process with Monaghan Landscaping could not have been more seamless and professional.

Kiley LaRue

I recently had a retaining wall that had failed redone on stone by Monaghan's and I am quite satisfied with their work. Follow up on my request for an estimate was prompt, the price was fair (came in under budget in the end).

Joseph Bubalo

Jamie, Colette and their team did a great job on our property. We've contracted them for pavement and landscaping job. The team was on time, professional, organized, attentive to our wishes and very quick.

Olena Dochez

Why choose us?

Serving Portland since

We've been landscaping across the Portland metro area since 1987, bringing decades of hands-on experience to every residential and commercial project we take on.

Licensed Oregon

We're a licensed Oregon landscape contractor, LCB# 7419, so you can hire us with confidence knowing the work meets state requirements and standards.

Written line-item

Every project starts with a free on-site consultation and a detailed written estimate showing scope, materials, and pricing. No verbal ballparks, no surprises.

3-year workmanship

Our work is backed by a 3-year workmanship warranty on structures and installations, with terms documented in your written proposal before we begin.

Built for Portland soil

From retaining walls to drainage, we design and build for Portland's clay soil, heavy seasonal rainfall, and freeze-thaw cycles so your investment lasts.

Family owned and local

We're a family-owned, locally-owned business rooted in the Portland metro, and we treat every yard like it's in our own neighborhood because it is.

Location & hours

Monaghan's Landscaping

7925 SW Canyon Ln, Portland, Oregon 97225

FAQs

What areas do you serve?

We serve the greater Portland metro area across Multnomah, Clackamas, and Washington Counties. That includes Portland, Lake Oswego, West Linn, Happy Valley, Beaverton, Aloha, Clackamas, Damascus, Milwaukie, Gladstone, Tigard, Tualatin, Oregon City, Hillsboro, Sherwood, Wilsonville, King City, Durham, and surrounding communities. If you're not sure whether we cover your area, call (503) 847-9110.

What services do you offer?

Our core services are retaining wall installation, sod lawn installation, automatic sprinkler systems, artificial turf, and paver installation. We also handle landscape design, drainage solutions, grading and erosion control, landscape lighting, fire pits and outdoor kitchens, tree and shrub planting, mulch, seasonal cleanups, sprinkler repair, hardscape renovation, and commercial landscaping.

What does pricing look like?

It depends on the scope of your project. We start with a free on-site consultation, then provide a detailed written estimate with line-item pricing, material specifications, and a timeline. You'll see exactly what everything costs before you commit, with no verbal ballpark guesses.

Are you licensed and insured?

Yes. We hold Oregon landscape contractor license LCB# 7419 and we're fully bonded and insured with general liability and workers' compensation coverage.

What's your warranty?

We provide a 3-year workmanship warranty on structures and installations, a 3-year warranty on equipment and fixtures, and a 1-year plant warranty with proper watering compliance. All warranty terms are documented in your written proposal before work begins.

How do I get started and how can I reach you?

Call us at (503) 847-9110, email info@monaghanslandscaping.com, or request a quote through our contact form. We'll schedule an on-site consultation, walk your property, and follow up with a detailed written estimate. There's no pressure and no obligation.

What payment methods do you accept?

We accept cash, check, credit card, and Venmo. We require a 50% deposit to begin work, with the balance due on completion, and for larger projects we can structure milestone-based or phased payments. All terms are documented in your written contract.

Do you work year-round in Portland?

Yes. Portland's mild climate lets us work through all four seasons. Fall and spring are ideal for planting, summer is peak construction season, and the wet winter months are actually the best time for drainage work when we can see exactly where water flows.

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Hours
Phone	(503) 847-9110
Email	info@monaghanslandscaping.com
Website	http://monaghanslandscaping.com/
Address	7925 SW Canyon Ln Portland, OR 97225
Price	$$
Founded	1987
License	LCB# 7419
Payment	Cash, Check, Credit Card, Venmo
Industry	Landscaping

Monaghan's Landscaping

Retaining wall installation

Sod lawn installation

Automatic sprinkler system installation

Artificial turf installation

Paver installation

Serving Portland since

Licensed Oregon

Written line-item

3-year workmanship

Built for Portland soil

Family owned and local

Contact Monaghan's Landscaping