Pittsburgh's expert arborists. Reading the hillside before the tree falls on it.

Every Pittsburgh neighborhood sits on some version of the same problem: thin acidic soil over rock, a climate that gets wetter with elevation, and root systems that never anchor as deep as the canopy above them suggests. We remove, prune, and cable through hemlock decline, ash borer, oak dieback, and the ice storms and derechos that find the weak point on every hillside stand. Expert arborists, on call around the clock, from the rivers to the ridge tops.

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Why Pittsburgh

Why Pittsburgh's slopes need a real arborist.

The Certified Arborist Tree Service brings expert arborists, consistent standards, and full insurance to every job across Pittsburgh's three rivers and the ridges above them, whether it is a single removal or a citywide storm cleanup.

Pittsburgh's ground works against a tree in two directions at once: rocky, thin, acidic soil drains fast on the flats and pools on the slopes, and a cool humid continental climate turns wetter with every hundred feet of elevation gained above a river valley. That combination is what pushes root plates loose on a saturated hillside long before the canopy shows any sign of stress.

Knowing which species hold up on this kind of terrain, and which ones fail predictably once ice storms, derechos, or a soaking week of rain arrive, is the difference between a tree that gets managed on a schedule and one that ends up on a roof mid winter.

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Why Pittsburgh trees fail

The risks we watch in Pittsburgh right now.

When a tree fails on a Pittsburgh hillside, the cause is almost always one of these four, and we check for all of them on every site visit.

Hemlock Woolly Adelgid

Eastern hemlocks tucked into Pittsburgh's shaded ravines and north facing slopes can carry this insect for years before the crown thins in any way a homeowner notices. By the time needles drop, the tree is often past saving, which is why we check the underside of twigs for the small white woolly cocoons at every visit, not just when a tree already looks sick.

Emerald Ash Borer

Ash planted along Pittsburgh's older streets and yards is, at this point, almost universally infested. A dead ash over a driveway or roofline is a standing hazard rather than a maybe, and the window to remove it safely closes fast once the wood starts to turn brittle.

Oak Decline

White oak and other native oaks on Pittsburgh's thin, rocky slopes show canopy dieback once drought stress stacks on root disturbance from nearby grading, utility trenching, or construction. We read the thinning crown for early decline signs well before it turns into a removal call.

Hillside Root Plate Failure

Saturated soil on Allegheny County's steep grades is the single biggest driver of sudden tree failure here. A tree that looked perfectly stable in dry weather can tip whole after a week of soaking rain, so we check lean, soil heave, and drainage on every sloped property we visit.

Service area

Our Pittsburgh service area.

Serving Pittsburgh, Allegheny County, and the surrounding Appalachian hill towns.

Areas we cover

Click an area to learn more about our work there.

What people are saying

Rated 4.9 stars across 140+ reviews.

Real reviews from real customers, straight from our Google Business Profile. Here's what people say once the crew has packed up and the yard is clean.

★★★★★

March 11th, a brief but strong storm came through Goodlettsville and blew over two giant trees in my front yard; one which was being supported by a 3rd tree that was facing and threatening my house. It was an…

Julie Bangs●3 days ago

★★★★★

From the time I inquired w this company about removing a tree that was strongly impacted from the major strong 80 mph winds on March 3, 2023, they provided us w exceptional service in every way . They were…

Jeanne Mason●3 weeks ago

★★★★★

CATS crew was amazing across the board from Mike & Lisa & Joe to the crew that came to our house. The consultation was easy and informative and made me feel comfortable in choosing them. The price was less…

Guy Hunt●1 month ago

Read all 140+ reviews on Google

What we do

A geotagged inventory of every tree on the property: species, age, condition, and recommended work, refreshed annually.

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Trees we know

The Pittsburgh species list, and what we watch for.

Local soil, local weather, local pests. Each species here fails in its own way, and we plan around all of them.

Red Maple

Tolerates Pittsburgh's acidic, rocky soil well, but a specimen left unpruned develops included bark and codominant stems that split apart the moment ice loads a wide crown.

Honeylocust

A frequent street tree pick for its tolerance of compacted urban soil, though older plantings often carry weak branch unions that only show up once a derecho tests them.

Callery Pear

Grows fast in newer Pittsburgh developments, and its narrow, tight branch angles fail almost on schedule the first time wind or ice loading hits a mature crown.

Sugar Maple

A backbone species on cooler, higher elevation lots around the city, sensitive to soil compaction and to road salt runoff collecting at the bottom of a sloped driveway.

White Pine

Reaches height quickly on Pittsburgh's acidic soils, so ice load and wind throw become the dominant risk once a stand pushes past forty feet.

White Oak

A native anchor of the Appalachian woodlots ringing Pittsburgh, worth protecting early since recovery is slow once oak decline sets in on a stressed, rocky slope.

Local expertise

Why an Expert Arborist Matters in Pittsburgh

Pittsburgh's terrain does a tree few favors. Steep grades, thin acidic soil, and a climate that gets wetter the higher you climb mean root systems here run shallower and less anchored than they look from street level. A crew with a chainsaw handles the tree that already failed. An arborist is trained to spot the one still standing that is about to.

Every estimate is walked in person by an experienced arborist who checks lean, soil saturation, and canopy health together, not just the one obvious dead limb. Cuts follow ANSI A300 standards, risk assessments are TRAQ qualified, and every property owner gets a written plan plus a current Certificate of Insurance before any work begins.

Across Greater Pittsburgh

From New Castle in Lawrence County down through the Allegheny County suburbs, ridge and river terrain shifts block by block, and so does the specific mix of pests, soil, and storm exposure we watch for.

Every community in our coverage list gets its own page built around what actually threatens trees in that town, not a reprint of Pittsburgh's page with the city name swapped out.

Pittsburgh FAQ

Local questions, local answers.

Don't see your question? Call us. Every call is answered by a human arborist, day or night.

Do I need a permit to remove a tree in Pittsburgh?

Local rules vary by jurisdiction, lot, and whether the tree is protected, and Pittsburgh's municipalities do not all agree with each other on the details. We confirm what your exact Allegheny County address requires and handle any permit or arborist report needed before work begins.

How fast can an arborist get to my property?

Most estimate visits happen within 24 hours, and storm emergencies get a crew on site the same day. We answer the phone around the clock, including for hillside properties after heavy rain has already started to move ground.

Why do so many trees fail on Pittsburgh hillsides specifically?

Thin, rocky, acidic soil over a steep grade does not hold a root plate the way flat, deep soil does. Add a week of saturating rain, an ice storm, or a derecho, and a tree that looked stable a month earlier can go over with almost no warning.

What is stressing trees in Pittsburgh right now?

Hemlock woolly adelgid is thinning ravine hemlocks, emerald ash borer has left most untreated ash dead or dying, and oak decline keeps showing up on drought stressed, rocky lots. Root plate failure on saturated hillsides remains the top risk once storm season arrives.

What standards do your arborists follow?

Every job runs to ANSI A300 pruning standards, and every risk assessment is TRAQ qualified. An expert arborist walks the property in person before any cutting starts, on a hillside lot or a flat one.

Are you insured?

Yes. We carry full general liability and workers' compensation on every crew and can email a current Certificate of Insurance before work begins, which most Pittsburgh HOAs and insurers ask to see.

Take back your trees today

One expert arborist. Every tree on your property.

Free estimate. Twenty-four-hour response. No contracts. No commitments.

Or call (844) 835-8733, answered 24/7 by a human.